AS12637 - SEEWEB SEEWEB s.r.lPI/PARFC 4890 ✓RPKI ✓ 10/10ASPA ✓

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AS overview

Test target: 2001:4b78::22 · dns2.seeweb.it · address space: mixed · prefixes announced: 10

prefix(es): 2a05:b6c1::/32, 2a02:e9::/32, 2a02:ea::/32, 2a0d:b000::/29, 2a04:2700::/29, 2a05:b6c0::/32, 2a0b:fd40::/29, 2001:4b78::/29 (+2 more)

Targets & per-vantage-point probe results (10 target(s) across 7 vantage point(s))

Source codes (hover any badge for full description): CUR=curated · NS/SOA/MX=DNS records · SPF=SPF TXT · DRV=holder-derived (www, ns1, mail, gw, …) · ATL=RIPE Atlas · PDB=PeeringDB · WHOIS=RIPE whois · RDAP=RIPE RDAP · HIT=IPv6 Hitlist · RTR=in-prefix path hop (router) · PRB=static prefix probe · SYN=synthetic prefix::1 fallback

Target IP / hostnameSourceSRB host (SOX, Belgrade)DE host (Berlin)DE host (Düsseldorf)NL host (go6lab)ITA host (Karsolink)SLO host (6connect)SLO host (T-2)
ping1500B:80:443reachedping1500B:80:443reachedping1500B:80:443reachedping1500B:80:443reachedping1500B:80:443reachedping1500B:80:443reachedping1500B:80:443reached
2001:4b78:1:20::28
smtp-avas.seeweb.it		MX✓✓refusedrefused✓✓✓refusedrefused✓✓✓refusedrefused✓✓✓??✓✓✓refusedrefused✓✓✓refusedrefused✓✓✓refusedrefused-
2001:4b78:1:3::140
dns1.seeweb.it		drv✓✓refusedrefused✓✓✓refusedrefused✓✓✓refusedrefused✓✓✓??✓✓✓refusedrefused✓✓✓refusedrefused✓✓✓refusedrefused-
2001:4b78:1:3::143
ns3.seeweb.it		drv✓✓refusedrefused✓✓✓refusedrefused✓✓✓refusedrefused✓✓✓??✓✓✓refusedrefused✓✓✓refusedrefused✓✓✓refusedrefused✓
2001:4b78:1:3::4
ns2.seeweb.it		drv✓✓refusedrefused✓✓✓refusedrefused✓✓✓refusedrefused✓✓✓??✓✓✓refusedrefused✓✓✓refusedrefused✓✓✓refusedrefused-
2001:4b78:1:a::75
anubi.seeweb.it		SPF✓✓openopen✓✓✓openopen✓✓✓openopen✓✓✓openopen✓✓✓openopen✓✓✓openopen✓✓✓openopen✓
2001:4b78:1:f:25::138
rah-b.seeweb.it		MX✓✓??-✓✓??-✓✓??-✓✓??-✓✓??-✓✓??-✓✓??-
2001:4b78:1:f::132
git.seeweb.it		drv✓✓??-✓✓??-✓✓??-✓✓??-✓✓??-✓✓??-✓✓??-
2001:4b78::22
dns2.seeweb.it		NS✓✓refusedrefused✓✓✓refusedrefused✓✓✓refusedrefused✓✓✓??✓✓✓refusedrefused✓✓✓refusedrefused✓✓✓refusedrefused✓
2001:4b78::5666
monitor.seeweb.it		drv✓✓?open-✓✓?open-✓✓?open-✓✓?open-✓✓?open-✓✓?open-✓✓?open-
2001:4b7a:100:1::1
ns3.freedns.si		NS✓✓refusedrefused✓✓✓refusedrefused✓✓✓refusedrefused✓✓✓??✓✓✓refusedrefused✓✓✓refusedrefused✓✓✓refusedrefused✓

MIX-IT / NAMEX / MINAP / TOP-IX / VSIX / EQUINIX-MILAN / BGPX-ROME / NAMEX-BARI / PCIX / DECIX-PALERMO peering

MIX-IT / NAMEX / MINAP / TOP-IX / VSIX / EQUINIX-MILAN / BGPX-ROME / NAMEX-BARI / PCIX / DECIX-PALERMO member - Open peering, peering member, since 2011-07-01. IPv6 LAN: 2001:7f8:b:100:1d1:a5d1:2637:86. Locations: -.

RPKI & ASPA

10 of 10 prefix(es) covered by a valid ROA.

PrefixRPKI stateReasonCovering VRP(s)
2a05:b6c1::/32✓ validmatched VRP (correct origin, length within maxLength)AS12637 /29 maxLen 48 (ripe)
2a02:e9::/32✓ validmatched VRP (correct origin, length within maxLength)AS12637 /32 maxLen 32 (ripe)
2a02:ea::/32✓ validmatched VRP (correct origin, length within maxLength)AS12637 /32 maxLen 48 (ripe)
2a0d:b000::/29✓ validmatched VRP (correct origin, length within maxLength)AS12637 /29 maxLen 48 (ripe)
2a04:2700::/29✓ validmatched VRP (correct origin, length within maxLength)AS12637 /29 maxLen 48 (ripe)
2a05:b6c0::/32✓ validmatched VRP (correct origin, length within maxLength)AS12637 /29 maxLen 48 (ripe)
2a0b:fd40::/29✓ validmatched VRP (correct origin, length within maxLength)AS12637 /29 maxLen 48 (ripe)
2001:4b78::/29✓ validmatched VRP (correct origin, length within maxLength)AS12637 /29 maxLen 48 (ripe)
2001:4b78::/32✓ validmatched VRP (correct origin, length within maxLength)AS12637 /32 maxLen 48 (ripe); AS12637 /29 maxLen 48 (ripe)
2a05:be80::/29✓ validmatched VRP (correct origin, length within maxLength)AS12637 /29 maxLen 48 (ripe)

ASPA: this AS has published an ASPA record listing 5 upstream provider(s) that are authorized to propagate routes from it: AS174, AS1299, AS2914, AS3303, AS50673. Routes from this AS that arrive via any other upstream are considered ASPA-invalid by validators that enforce ASPA.

Random-IP probe (yarrp) into the AS' prefixes

We probed 70 arbitrary IPv6 address(es) inside AS12637's announced prefix(es). No router inside the prefix responded. The deepest visible hop was 2001:918:100:11::1 at hop 15 - that router does not answer ICMPv6 Echo. This is not in AS12637's announced prefix; operationally it's the AS-edge / peering interface (often on an IXP peering address or an upstream's /127 link). The traceroute boundary is the AS edge: ICMPv6 Time-Exceeded responses from anything inside this AS are filtered.

ICMPv6 Type 2 (Packet Too Big) acceptance - active test

Type 2 honored. Forged ICMPv6 PTB (MTU=1280) was accepted by the destination's stack: the next 1500-byte Echo Reply arrived split into 2 fragments via the IPv6 Fragment Header.
method: ICMPv6 Echo + forged PTB, tested 2026-09-23T11:59:51Z

tracepath6 per-hop PMTU drilldown

For each target where Type 2 verdicts disagreed across vantages, tracepath -6 ran from every vantage to capture per-hop PMTU evolution along that vantage's actual forward path. A pmtu change entry on a hop means that hop's router generated a PTB and we observed the shrink; absence of any change combined with a not_honored verdict suggests a router somewhere downstream is silently dropping >MTU packets (an RFC 4890 violation) rather than sending a PTB.

Target 2001:4b78:1:20::28

amsterdam - verdict ?

(no hops captured)

belgrade - verdict honored

verdict = honored; final pmtu = 1500

#hop IPpmtu change
1<span class='muted'>no reply</span>
22001:7f8:1e:8::3a
32001:7f8:1e:8::3d
42001:67c:128c::699
52001:4b78:1:20::28
berlin - verdict honored

verdict = honored; final pmtu = 1500

#hop IPpmtu change
1<span class='muted'>no reply</span>
22a06:d1c0::dead:beef:1c02
32a00:c380:b200:230::174
42001:668:0:3:ffff:1:0:3d5d
52001:668:0:2:ffff:0:5995:890e
62001:668:0:3:ffff:0:2e21:53fe
72001:728:0:2000::1fd
82001:728:0:2000::212
92001:728:0:2000::25a
102001:728:0:5000::b4a
112001:4b78:0:f003::2
122001:4b78:1::f13a
132001:4b78:1:20::28
duseldorf - verdict honored

verdict = honored; final pmtu = 1500

#hop IPpmtu change
1<span class='muted'>no reply</span>
22001:4ba0:92f4:3::1
3<span class='muted'>no reply</span>
42001:4ba0:ffe9:109::2
52001:4ba0:ffe9:8a::2
62001:4ba0:ffe9:103e::1
72001:4ba0:ffe9:103b::1
82001:4ba0:ffe9:b8::
92001:4ba0:ffe9:a7::1
102001:4ba0:ffe9:da::2
112001:4ba0:ffe9:db::2
122001:7f8:b:100:1d1:a5d1:2637:86
132001:4b78:0:f003::2
142001:4b78:1::f13a
152001:4b78:1:20::28
go6lab - verdict not_honored

verdict = not_honored; final pmtu = 1500

#hop IPpmtu change
1<span class='muted'>no reply</span>
22a00:8642:1000:f000::1
32a00:8642:dc1:2::b
42001:7f8:1::a501:2637:1
52001:4b7a:0:f000::1
62001:4b78:0:f003::2
72001:4b78:1::f13a
82001:4b78:1:20::28
karsolink - verdict honored

verdict = honored; final pmtu = 1500

#hop IPpmtu change
1<span class='muted'>no reply</span>
22a12:d8c0:109f:121::a1
32a12:d8c0:101f:103::1
42001:7f8:b:100:1d1:a5d1:2637:86
52001:4b78:0:f003::2
62001:4b78:1::f13a
72001:4b78:1:20::28
odin - verdict honored

verdict = honored; final pmtu = 1500

#hop IPpmtu change
1<span class='muted'>no reply</span>
22607:fae0:a000:2::2
32a03:a100:0:201:1::1
42a03:a100:0:201:1::1
5<span class='muted'>no reply</span>
62001:470:0:2ea::2
7<span class='muted'>no reply</span>
82001:7f8:b:100:1d1:a5d1:2637:86
92001:4b78:0:f003::2
102001:4b78:1::f13a
112001:4b78:1:20::28
t2 - verdict honored

verdict = honored; final pmtu = 1500

#hop IPpmtu change
1<span class='muted'>no reply</span>
22a01:260:1::225
32a01:260:1:1::9c
42001:7f8:13::a500:6939:1
52001:470:e:43::2
62001:470:e:18::2
7<span class='muted'>no reply</span>
82001:470:e:153::2
92001:470:e:dd::1
102001:7f8:b:100:1d1:a5d1:2637:86
112001:4b78:0:f003::2
122001:4b78:1::f13a
132001:4b78:1:20::28

Target 2001:4b78:1:a::75

amsterdam - verdict ?

(no hops captured)

belgrade - verdict honored

verdict = honored; final pmtu = 1500

#hop IPpmtu change
1<span class='muted'>no reply</span>
22001:7f8:1e:8::3a
32001:7f8:1e:8::3d
42001:67c:128c::699
52001:4b78:1:a::75
berlin - verdict honored

verdict = honored; final pmtu = 1500

#hop IPpmtu change
1<span class='muted'>no reply</span>
22a06:d1c0::dead:beef:1c02
32a00:c380:b200:230::174
42001:668:0:3:ffff:1:0:3d5d
52001:668:0:2:ffff:0:5995:890e
62001:668:0:3:ffff:0:2e21:53fe
72001:728:0:2000::1fd
82001:728:0:2000::212
92001:728:0:2000::25a
102001:728:0:5000::b4a
112001:4b78:0:f003::2
122001:4b78:0:f004::1
132001:4b78:1:a::75
duseldorf - verdict honored

verdict = honored; final pmtu = 1500

#hop IPpmtu change
1<span class='muted'>no reply</span>
22001:4ba0:92f4:3::1
3<span class='muted'>no reply</span>
42001:4ba0:ffe9:109::2
52001:4ba0:ffe9:8a::2
62001:4ba0:ffe9:103e::1
72001:4ba0:ffe9:103b::1
82001:4ba0:ffe9:b8::
92001:4ba0:ffe9:a7::1
102001:4ba0:ffe9:da::2
112001:4ba0:ffe9:db::2
122001:7f8:b:100:1d1:a5d1:2637:86
132001:4b78:0:f003::2
142001:4b78:0:f004::1
152001:4b78:1:a::75
go6lab - verdict not_honored

verdict = not_honored; final pmtu = 1500

#hop IPpmtu change
1<span class='muted'>no reply</span>
22a00:8642:1000:f000::1
32a00:8642:dc1:2::b
42001:7f8:1::a501:2637:1
52001:4b7a:0:f000::1
62001:4b78:0:f003::2
72001:4b78:0:f004::1
82001:4b78:1:a::75
karsolink - verdict honored

verdict = honored; final pmtu = 1500

#hop IPpmtu change
1<span class='muted'>no reply</span>
22a12:d8c0:109f:121::a1
32a12:d8c0:101f:103::1
42001:7f8:b:100:1d1:a5d1:2637:86
52001:4b78:0:f003::2
62001:4b78:0:f004::1
72001:4b78:1:a::75
odin - verdict honored

verdict = honored; final pmtu = 1500

#hop IPpmtu change
1<span class='muted'>no reply</span>
22607:fae0:a000:2::2
32a03:a100:0:201:1::1
42a03:a100:0:201:1::1
5<span class='muted'>no reply</span>
62001:470:0:2ea::2
7<span class='muted'>no reply</span>
82001:7f8:b:100:1d1:a5d1:2637:86
92001:4b78:0:f003::2
102001:4b78:0:f004::1
112001:4b78:1:a::75
t2 - verdict honored

verdict = honored; final pmtu = 1500

#hop IPpmtu change
1<span class='muted'>no reply</span>
22a01:260:1::225
32a01:260:1:1::9c
42a01:260:1:1::39
52001:7f8:13::a500:6939:1
62001:470:e:18::2
72001:470:e:153::2
82001:470:e:dd::1
92001:470:e:dd::1
102001:7f8:b:100:1d1:a5d1:2637:86
112001:7f8:b:100:1d1:a5d1:2637:86
122001:4b78:0:f004::1
132001:4b78:0:f004::1
142001:4b78:1:a::75

Target 2001:4b78:1:3::140

amsterdam - verdict ?

(no hops captured)

belgrade - verdict honored

verdict = honored; final pmtu = 1500

#hop IPpmtu change
1<span class='muted'>no reply</span>
22001:7f8:1e:8::3a
32001:7f8:1e:8::3d
42001:67c:128c::699
52001:4b78:1:3::140
berlin - verdict honored

verdict = honored; final pmtu = 1500

#hop IPpmtu change
1<span class='muted'>no reply</span>
22a06:d1c0::dead:beef:1c02
32a00:c380:b200:230::174
42001:668:0:3:ffff:1:0:3d5d
52001:668:0:2:ffff:0:5995:890e
62001:668:0:3:ffff:0:2e21:53fe
72001:728:0:2000::1fd
82001:728:0:2000::212
92001:728:0:2000::25a
102001:728:0:5000::b4a
112001:4b78:0:f003::2
122001:4b78:1:3::140
duseldorf - verdict honored

verdict = honored; final pmtu = 1500

#hop IPpmtu change
1<span class='muted'>no reply</span>
22001:4ba0:92f4:3::1
3<span class='muted'>no reply</span>
42001:4ba0:ffe9:115::3
52001:4ba0:ffe9:8a::2
62001:4ba0:ffe9:103e::1
72001:4ba0:ffe9:103b::1
82001:4ba0:ffe9:b8::
92001:4ba0:ffe9:a7::1
102001:4ba0:ffe9:da::2
112001:4ba0:ffe9:db::2
122001:7f8:b:100:1d1:a5d1:2637:86
132001:4b78:0:f003::2
142001:4b78:1:3::140
go6lab - verdict not_honored

verdict = not_honored; final pmtu = 1500

#hop IPpmtu change
1<span class='muted'>no reply</span>
22a00:8642:1000:f000::1
32a00:8642:dc1:2::b
42001:7f8:1::a501:2637:1
52001:4b7a:0:f000::1
62001:4b78:0:f003::2
72001:4b78:1:3::140
karsolink - verdict honored

verdict = honored; final pmtu = 1500

#hop IPpmtu change
1<span class='muted'>no reply</span>
22a12:d8c0:109f:121::a1
32a12:d8c0:101f:103::1
42001:7f8:b:100:1d1:a5d1:2637:86
52001:4b78:0:f003::2
62001:4b78:1:3::140
odin - verdict honored

verdict = honored; final pmtu = 1500

#hop IPpmtu change
1<span class='muted'>no reply</span>
22607:fae0:a000:2::2
32a03:a100:0:201:1::1
42a03:a100:0:201:1::1
5<span class='muted'>no reply</span>
62001:470:0:2ea::2
7<span class='muted'>no reply</span>
82001:7f8:b:100:1d1:a5d1:2637:86
92001:4b78:0:f003::2
102001:4b78:1:3::140
t2 - verdict honored

verdict = honored; final pmtu = 1500

#hop IPpmtu change
1<span class='muted'>no reply</span>
22a01:260:1::225
32a01:260:1:1::9a
42a01:260:1:1::39
52001:7f8:13::a500:6939:1
62001:470:e:5a::2
72001:470:e:153::2
82001:470:e:153::2
92001:470:e:dd::1
102001:7f8:b:100:1d1:a5d1:2637:86
112001:4b78:0:f003::2
122001:4b78:1:3::140

Target 2001:4b78:1:3::4

amsterdam - verdict ?

(no hops captured)

belgrade - verdict honored

verdict = honored; final pmtu = 1500

#hop IPpmtu change
1<span class='muted'>no reply</span>
22001:7f8:1e:8::3a
32001:7f8:1e:8::3d
42001:67c:128c::699
52001:4b78:1:3::4
berlin - verdict honored

verdict = honored; final pmtu = 1500

#hop IPpmtu change
1<span class='muted'>no reply</span>
22a06:d1c0::dead:beef:1c02
32a00:c380:b200:230::174
42001:668:0:3:ffff:1:0:3d5d
52001:668:0:2:ffff:0:5995:890e
62001:668:0:3:ffff:0:2e21:53fe
72001:728:0:2000::1fd
82001:728:0:2000::212
92001:728:0:2000::25a
102001:728:0:5000::b4a
112001:4b78:0:f003::2
122001:4b78:1:3::4
duseldorf - verdict honored

verdict = honored; final pmtu = 1500

#hop IPpmtu change
1<span class='muted'>no reply</span>
22001:4ba0:92f4:3::1
3<span class='muted'>no reply</span>
42001:4ba0:ffe9:109::2
52001:4ba0:ffe9:8a::2
62001:4ba0:ffe9:103e::1
72001:4ba0:ffe9:103b::1
82001:4ba0:ffe9:b8::
92001:4ba0:ffe9:a7::1
102001:4ba0:ffe9:da::2
112001:4ba0:ffe9:db::2
122001:7f8:b:100:1d1:a5d1:2637:86
132001:4b78:0:f003::2
142001:4b78:1:3::4
go6lab - verdict not_honored

verdict = not_honored; final pmtu = 1500

#hop IPpmtu change
1<span class='muted'>no reply</span>
22a00:8642:1000:f000::1
32a00:8642:dc1:2::b
42001:7f8:1::a501:2637:1
52001:4b7a:0:f000::1
62001:4b78:0:f003::2
72001:4b78:1:3::4
karsolink - verdict honored

verdict = honored; final pmtu = 1500

#hop IPpmtu change
1<span class='muted'>no reply</span>
22a12:d8c0:109f:121::a1
32a12:d8c0:101f:103::1
42001:7f8:b:100:1d1:a5d1:2637:86
52001:4b78:0:f003::2
62001:4b78:1:3::4
odin - verdict honored

verdict = honored; final pmtu = 1500

#hop IPpmtu change
1<span class='muted'>no reply</span>
22607:fae0:a000:2::2
32a03:a100:0:201:1::1
42a03:a100:0:201:1::1
5<span class='muted'>no reply</span>
62001:470:0:2ea::2
7<span class='muted'>no reply</span>
82001:7f8:b:100:1d1:a5d1:2637:86
92001:4b78:0:f003::2
102001:4b78:1:3::4
t2 - verdict honored

verdict = honored; final pmtu = 1500

#hop IPpmtu change
1<span class='muted'>no reply</span>
22a01:260:1::225
32a01:260:1:1::9a
42a01:260:1:1::39
52001:470:e:43::2
62001:470:e:43::2
72001:470:e:153::2
82001:470:e:153::2
92001:470:e:dd::1
102001:7f8:b:100:1d1:a5d1:2637:86
112001:7f8:b:100:1d1:a5d1:2637:86
122001:4b78:1:3::4

Multi-vantage path map

Every hop of all vantages’ traceroutes toward the target, drawn left→right, grouped into per-AS bubbles (a hop seen from several vantages is one shared bubble, so converging paths merge). It answers two questions per vantage — shown on each source bubble as echo ✓/⚠/✗ · trace ✓/✗: did the destination reply to ICMPv6 Echo (✓ honored, ⚠ replied but PTB not honored, ✗ no reply), and did the traceroute reach it. A line to the target is drawn only when that vantage got an echo reply — solid if the PTB was honored, dashed if not (reachable but a broken-PMTUD / RFC 4890 violation). The path depth still shows how far the traceroute itself got, and runs of unanswered (* *) hops collapse into one dashed “silent” bubble. Open full size ↗

multi-vantage path diagram for AS12637

From SRB host (SOX, Belgrade)   openRFC 4890 ✓

filter likely at: (none) · min PMTU on path: 1500

4/4
Echo small (56B) 43.6ms
4/4
Echo 1500B (DF) 43.6ms
yes
Type 1 dest-unreach
443,80
TCP responds on

Path (traceroute + mtr + PTR)

#IP / PTRRTTmtr lossASAS holder
12a09:ab81::10.2ms0%*AS60733PERKE-NET - ZORAN PEROVIC trading as Agencija Perke.NET, RS
2sox-pn.sox.rs
2001:7f8:1e:8::3a		0.3ms0%AS13004SOX - Serbian Open Exchange DOO, RS
32001:7f8:1e:8::3d0.5ms0%AS13004SOX - Serbian Open Exchange DOO, RS
4*-0%-
5dns2.seeweb.it
2001:4b78::22		43.6ms0%AS12637SEEWEB - SEEWEB s.r.l., IT

tracepath -6

 1?: [LOCALHOST]                        0.013ms pmtu 1500
 1:  _gateway                                              0.991ms 
 1:  _gateway                                              0.745ms 
 2:  sox-pn.sox.rs                                         0.494ms 
 3:  2001:7f8:1e:8::3d                                     0.757ms asymm  2 
 4:  2001:67c:128c::699                                   17.239ms 
 5:  dns2.seeweb.it                                       45.514ms reached
     Resume: pmtu 1500 hops 5 back 8

From DE host (Berlin)   openRFC 4890 ✓

filter likely at: (none) · min PMTU on path: 1500

4/4
Echo small (56B) 19.1ms
4/4
Echo 1500B (DF) 19.1ms
yes
Type 1 dest-unreach
443,80
TCP responds on

Path (traceroute + mtr + PTR)

#IP / PTRRTTmtr lossASAS holder
1xe-0-0-13-178.gw01.ber01.as59645.net
2a06:d1c1:100:b::1		0.3ms0%*AS59645WYBT-NET - Tobias Fiebig, DE
2ae0-2453.cr10.ber01.lwlcom.net
2a06:d1c0::dead:beef:1c02		0.7ms0%*AS59645WYBT-NET - Tobias Fiebig, DE
3ae0-150.cr10.fra01.lwlcom.net
2a00:c380:b200:230::174		10.0ms0%AS50629LWLCOM - LWLcom GmbH, DE
4ae6-3257.cr5-fra2.ip6.gtt.net
2001:668:0:3:ffff:1:0:3d5d		9.5ms0%AS3257GTT-BACKBONE - GTT Communications Inc., US
52001:668:0:2:ffff:0:5995:890e9.4ms0%AS3257GTT-BACKBONE - GTT Communications Inc., US
62001:668:0:3:ffff:0:2e21:53fe35.0ms0%AS3257GTT-BACKBONE - GTT Communications Inc., US
7ae-16.r27.frnkge13.de.bb.gin.ntt.net
2001:728:0:2000::1fd		16.3ms0%AS2914NTT-DATA-2914 - NTT America, Inc., US
8ae-7.r23.mlanit02.it.bb.gin.ntt.net
2001:728:0:2000::212		17.9ms0%AS2914NTT-DATA-2914 - NTT America, Inc., US
9ae-17.a00.mlanit02.it.bb.gin.ntt.net
2001:728:0:2000::25a		18.3ms0%AS2914NTT-DATA-2914 - NTT America, Inc., US
10xe2-0-1.spock.mil.seeweb.it
2001:728:0:5000::b4a		18.5ms0%AS2914NTT-DATA-2914 - NTT America, Inc., US
11horus.seeweb.it
2001:4b78:2:a::8		18.6ms0%AS12637SEEWEB - SEEWEB s.r.l., IT
12dns2.seeweb.it
2001:4b78::22		18.6ms0%AS12637SEEWEB - SEEWEB s.r.l., IT

tracepath -6

 1?: [LOCALHOST]                        0.042ms pmtu 1500
 1:  xe-0-0-13-178.gw01.ber01.as59645.net                  0.971ms 
 1:  xe-0-0-13-178.gw01.ber01.as59645.net                  0.825ms 
 2:  ae0-2453.cr10.ber01.lwlcom.net                        1.202ms 
 3:  ae0-150.cr10.fra01.lwlcom.net                        10.988ms asymm  7 
 4:  ae6-3257.cr5-fra2.ip6.gtt.net                        10.560ms asymm  9 
 5:  2001:668:0:2:ffff:0:5995:890e                        10.013ms asymm  9 
 6:  2001:668:0:3:ffff:0:2e21:53fe                        16.790ms asymm  8 
 7:  ae-16.r27.frnkge13.de.bb.gin.ntt.net                 16.781ms asymm  9 
 8:  ae-7.r23.mlanit02.it.bb.gin.ntt.net                  18.402ms asymm 11 
 9:  ae-17.a00.mlanit02.it.bb.gin.ntt.net                 18.205ms asymm 10 
10:  xe2-0-1.spock.mil.seeweb.it                          19.246ms asymm 11 
11:  horus.seeweb.it                                      18.757ms 
12:  dns2.seeweb.it                                       19.352ms reached
     Resume: pmtu 1500 hops 12 back 12

From DE host (Düsseldorf)   openRFC 4890 ✓

filter likely at: (none) · min PMTU on path: 1500

4/4
Echo small (56B) 20.2ms
4/4
Echo 1500B (DF) 20.2ms
yes
Type 1 dest-unreach
443,80
TCP responds on

Path (traceroute + mtr + PTR)

#IP / PTRRTTmtr lossASAS holder
1xe-0-0-12-142.gw01.dus01.as59645.net
2a06:d1c1:100:d::1		0.2ms0%*AS59645WYBT-NET - Tobias Fiebig, DE
2eth1-0-12-h5594.edge5-dus1.bb.wiit.network
2001:4ba0:92f4:3::1		5.1ms0%AS24961MYLOC-AS - WIIT AG, DE
3lag13.agr3-dus3.bb.wiit.network
2001:4ba0:ffe9:7d::1		1.9ms0%AS24961MYLOC-AS - WIIT AG, DE
4lag30.core3-dus1.bb.wiit.network
2001:4ba0:ffe9:109::2		0.2ms0%AS24961MYLOC-AS - WIIT AG, DE
5lag0-vl1011.core1-fra-ix.bb.wiit.network
2001:4ba0:ffe9:8a::2		4.3ms0%AS24961MYLOC-AS - WIIT AG, DE
6lag0-vl1001.core1-nbg-ncd.bb.wiit.network
2001:4ba0:ffe9:103e::1		6.9ms0%AS24961MYLOC-AS - WIIT AG, DE
7lag0-vl6.core2-nbg-ncd.bb.wiit.network
2001:4ba0:ffe9:103b::1		7.0ms0%AS24961MYLOC-AS - WIIT AG, DE
82001:4ba0:ffe9:b811.6ms0%-
9lag0-vl1009.core1-muc-eq3.bb.wiit.network
2001:4ba0:ffe9:a7::1		9.6ms0%AS24961MYLOC-AS - WIIT AG, DE
10lag0-vl1001.core1-pda-vsix.bb.wiit.network
2001:4ba0:ffe9:da::2		20.2ms0%AS24961MYLOC-AS - WIIT AG, DE
11lag0-vl1001.core1-mil-mix.bb.wiit.network
2001:4ba0:ffe9:db::2		20.2ms0%AS24961MYLOC-AS - WIIT AG, DE
12seeweb-v6.mix-it.net @MIX-IT / NAMEX / MINAP / TOP-IX / VSIX / EQUINIX-MILAN / BGPX-ROME / NAMEX-BARI / PCIX / DECIX-PALERMO
2001:7f8:b:100:1d1:a5d1:2637:86		20.1ms0%-NA
13horus.seeweb.it
2001:4b78:2:a::8		20.1ms0%AS12637SEEWEB - SEEWEB s.r.l., IT
14dns2.seeweb.it
2001:4b78::22		20.1ms0%AS12637SEEWEB - SEEWEB s.r.l., IT

tracepath -6

 1?: [LOCALHOST]                        0.010ms pmtu 1500
 1:  xe-0-0-12-142.gw01.dus01.as59645.net                  0.368ms 
 1:  xe-0-0-12-142.gw01.dus01.as59645.net                  0.266ms 
 2:  eth1-0-12-h5594.edge5-dus1.bb.wiit.network           29.502ms 
 3:  no reply
 4:  lag30.core3-dus1.bb.wiit.network                      0.314ms 
 5:  lag0-vl1011.core1-fra-ix.bb.wiit.network              4.174ms 
 6:  lag0-vl1001.core1-nbg-ncd.bb.wiit.network             6.947ms 
 7:  lag0-vl6.core2-nbg-ncd.bb.wiit.network                6.812ms 
 8:  lag0-vl1006.core2-muc2.bb.wiit.network                9.590ms 
 9:  lag0-vl1009.core1-muc-eq3.bb.wiit.network             9.632ms 
10:  lag0-vl1001.core1-pda-vsix.bb.wiit.network           20.617ms 
11:  lag0-vl1001.core1-mil-mix.bb.wiit.network            20.100ms asymm  9 
12:  seeweb-v6.mix-it.net                                 20.428ms asymm 10 
13:  horus.seeweb.it                                      20.467ms asymm 10 
14:  dns2.seeweb.it                                       20.402ms reached
     Resume: pmtu 1500 hops 14 back 11

From NL host (go6lab)   openRFC 4890 ✓

filter likely at: (none) · min PMTU on path: 1500

4/4
Echo small (56B) 22.2ms
4/4
Echo 1500B (DF) 20.8ms
yes
Type 1 dest-unreach
-
TCP responds on

Path (traceroute + mtr + PTR)

#IP / PTRRTTmtr lossASAS holder
12a00:8642:42::25.1ms0%AS203993GNA-DC1-AS - S.J.M. Steffann, NL
2*-0%*-
3ccr2-ccr1.dc1.nogalliance.org
2a00:8642:dc1:2::b		4.8ms0%AS203993GNA-DC1-AS - S.J.M. Steffann, NL
4ams-ix.mil.seeweb.it
2001:7f8:1::a501:2637:1		20.2ms0%-NA
5horus.seeweb.it
2001:4b78:2:a::8		20.7ms0%AS12637SEEWEB - SEEWEB s.r.l., IT
6dns2.seeweb.it
2001:4b78::22		18.7ms0%AS12637SEEWEB - SEEWEB s.r.l., IT

tracepath -6

 1?: [LOCALHOST]                        0.057ms pmtu 1500
 1:  2a00:8642:42::2                                       4.957ms 
 1:  2a00:8642:42::2                                       1.994ms 
 2:  no reply
 3:  ccr2-ccr1.dc1.nogalliance.org                         3.652ms asymm  2 
 4:  ams-ix.mil.seeweb.it                                 20.409ms asymm  5 
 5:  horus.seeweb.it                                      20.488ms asymm  6 
 6:  dns2.seeweb.it                                       21.643ms reached
     Resume: pmtu 1500 hops 6 back 7

From ITA host (Karsolink)   openRFC 4890 ✓

filter likely at: (none) · min PMTU on path: 1500

4/4
Echo small (56B) 8.9ms
3/4
Echo 1500B (DF) 9.2ms
yes
Type 1 dest-unreach
443,80
TCP responds on

Path (traceroute + mtr + PTR)

#IP / PTRRTTmtr lossASAS holder
1*---
2*-0%*-
3*-10%-
4seeweb-v6.mix-it.net @MIX-IT / NAMEX / MINAP / TOP-IX / VSIX / EQUINIX-MILAN / BGPX-ROME / NAMEX-BARI / PCIX / DECIX-PALERMO
2001:7f8:b:100:1d1:a5d1:2637:86		8.5ms0%-NA
5horus.seeweb.it
2001:4b78:2:a::8		8.7ms0%AS12637SEEWEB - SEEWEB s.r.l., IT
6dns2.seeweb.it
2001:4b78::22		8.5ms0%AS12637SEEWEB - SEEWEB s.r.l., IT

Rate-limited ICMPv6: hop 3 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).

tracepath -6

 1?: [LOCALHOST]                        0.013ms pmtu 1500
 1:  no reply
 2:  2a12:d8c0:109f:121::a1                                0.968ms 
 3:  no reply
 4:  seeweb-v6.mix-it.net                                  9.030ms 
 5:  horus.seeweb.it                                       8.924ms asymm  6 
 6:  dns2.seeweb.it                                        9.024ms reached
     Resume: pmtu 1500 hops 6 back 7

From SLO host (6connect)   openRFC 4890 ✓

filter likely at: (none) · min PMTU on path: 1500

4/4
Echo small (56B) 12.2ms
3/4
Echo 1500B (DF) 12.3ms
yes
Type 1 dest-unreach
443,80
TCP responds on

Path (traceroute + mtr + PTR)

#IP / PTRRTTmtr lossASAS holder
1fw1-lju.6connect.com
2607:fae0:a000::2		0.3ms0%*AS80386CONNECT - 6connect, Inc., US
2*---
3*-0%-
4*-90%-
5*---
6*-90%-
7*---
8seeweb-v6.mix-it.net @MIX-IT / NAMEX / MINAP / TOP-IX / VSIX / EQUINIX-MILAN / BGPX-ROME / NAMEX-BARI / PCIX / DECIX-PALERMO
2001:7f8:b:100:1d1:a5d1:2637:86		85.6ms0%-NA
9horus.seeweb.it
2001:4b78:2:a::8		12.3ms0%AS12637SEEWEB - SEEWEB s.r.l., IT
10dns2.seeweb.it
2001:4b78::22		12.7ms0%AS12637SEEWEB - SEEWEB s.r.l., IT

Rate-limited ICMPv6: hop 4, hop 6 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).

tracepath -6

 1?: [LOCALHOST]                        0.038ms pmtu 9000
 1:  fw1-lju.6connect.com                                  0.601ms 
 1:  fw1-lju.6connect.com                                  0.455ms 
 2:  no reply
 3:  2a03:a100:0:201:1::1                                  1.139ms 
 4:  2a03:a100:0:201:1::1                                  1.639ms pmtu 1500
 4:  e0-1.core1.lju1.he.net                                2.438ms 
 5:  no reply
 6:  port-channel1.core1.zag2.he.net                       3.939ms 
 7:  no reply
 8:  seeweb-v6.mix-it.net                                 12.580ms asymm  9 
 9:  horus.seeweb.it                                      12.988ms 
10:  dns2.seeweb.it                                       12.513ms reached
     Resume: pmtu 1500 hops 10 back 10

From SLO host (T-2)   openRFC 4890 ✓

filter likely at: (none) · min PMTU on path: 1500

4/4
Echo small (56B) 32.7ms
4/4
Echo 1500B (DF) 32.6ms
yes
Type 1 dest-unreach
443,80
TCP responds on

Path (traceroute + mtr + PTR)

#IP / PTRRTTmtr lossASAS holder
1*---
22a01:260:1::2253.3ms0%*AS34779T-2-AS - T-2, d.o.o., SI
32a01-260-1-1--9c.core6.t-2.net
2a01:260:1:1::9c		2.1ms0%*AS34779T-2-AS - T-2, d.o.o., SI
42a01-260-1-1--39.core6.t-2.net
2a01:260:1:1::39		1.6ms0%AS34779T-2-AS - T-2, d.o.o., SI
5hurricane-electric.nikhef.nlsix.net
2001:7f8:13::a500:6939:1		33.9ms40%-NA
6be1.core2.fra2.he.net
2001:470:e:43::2		36.6ms30%AS6939HURRICANE - Hurricane Electric LLC, US
7be10.core1.zrh2.he.net
2001:470:e:153::2		48.3ms0%AS6939HURRICANE - Hurricane Electric LLC, US
8be1.core1.mil2.he.net
2001:470:e:dd::1		35.6ms0%AS6939HURRICANE - Hurricane Electric LLC, US
9be1.core1.mil2.he.net
2001:470:e:dd::1		36.0ms-AS6939HURRICANE - Hurricane Electric LLC, US
10seeweb-v6.mix-it.net @MIX-IT / NAMEX / MINAP / TOP-IX / VSIX / EQUINIX-MILAN / BGPX-ROME / NAMEX-BARI / PCIX / DECIX-PALERMO
2001:7f8:b:100:1d1:a5d1:2637:86		32.5ms0%-NA
11seeweb-v6.mix-it.net @MIX-IT / NAMEX / MINAP / TOP-IX / VSIX / EQUINIX-MILAN / BGPX-ROME / NAMEX-BARI / PCIX / DECIX-PALERMO
2001:7f8:b:100:1d1:a5d1:2637:86		33.7ms0%-NA
12horus.seeweb.it
2001:4b78:2:a::8		33.5ms0%AS12637SEEWEB - SEEWEB s.r.l., IT
13dns2.seeweb.it
2001:4b78::22		33.9ms-AS12637SEEWEB - SEEWEB s.r.l., IT

Rate-limited ICMPv6: hop 5, hop 6 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).

tracepath -6

 1?: [LOCALHOST]                        0.028ms pmtu 1500
 1:  no reply
 2:  2a01:260:1::225                                       2.143ms 
 3:  2a01-260-1-1--9a.core6.t-2.net                        2.271ms 
 4:  hurricane-electric.nikhef.nlsix.net                  34.908ms 
 5:  hurricane-electric.nikhef.nlsix.net                  34.449ms asymm  4 
 6:  be1.core2.fra2.he.net                                36.810ms asymm  5 
 7:  be10.core1.zrh2.he.net                               43.675ms asymm  8 
 8:  be1.core1.mil2.he.net                                33.524ms asymm  7 
 9:  be1.core1.mil2.he.net                                35.134ms asymm  7 
10:  seeweb-v6.mix-it.net                                 66.158ms asymm  8 
11:  seeweb-v6.mix-it.net                                 32.006ms asymm  8 
12:  horus.seeweb.it                                      32.825ms asymm  8 
13:  dns2.seeweb.it                                       32.940ms reached
     Resume: pmtu 1500 hops 13 back 9