AS overview
Test target: 2001:67c:26fc:ffff::1 · via IPv6 Hitlist (responsive) · address space: PI · prefixes announced: 1
prefix(es): 2001:67c:26fc::/48
Targets & per-vantage-point probe results (2 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 / hostname | Source | SRB host (SOX, Belgrade) | DE host (Berlin) | DE host (Düsseldorf) | NL host (go6lab) | ITA host (Karsolink) | SLO host (6connect) | SLO host (T-2) | ||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ping | 1500B | :80 | :443 | reached | ping | 1500B | :80 | :443 | reached | ping | 1500B | :80 | :443 | reached | ping | 1500B | :80 | :443 | reached | ping | 1500B | :80 | :443 | reached | ping | 1500B | :80 | :443 | reached | ping | 1500B | :80 | :443 | reached | ||
2001:67c:26fc:ffff::1 | hit | ✓ | ✓ | ? | ? | - | ✓ | ✓ | ? | ? | - | ✓ | ✓ | ? | ? | - | ✓ | ✓ | ? | ? | - | ✓ | ✓ | ? | ? | - | ✓ | ✓ | ? | ? | - | ✓ | ✓ | ? | ? | - |
2001:67c:26fc:ffff::2 | hit | ✓ | ✓ | ? | ? | - | ✓ | ✓ | ? | ? | - | ✓ | ✓ | ? | ? | - | ✓ | ✓ | ? | ? | - | ✓ | ✓ | ? | ? | - | ✓ | ✓ | ? | ? | - | ✓ | ✓ | ? | ? | - |
SIX peering
Not an SIX member, but our traceroute path crosses the SIX LAN from SLO host (6connect) - reached via an SIX-resident transit operator.
RPKI & ASPA
0 of 1 prefix(es) covered by a valid ROA, 1 not-found.
| Prefix | RPKI state | Reason | Covering VRP(s) |
|---|---|---|---|
2001:67c:26fc::/48 | - not-found | no covering VRP |
Random-IP probe (yarrp) into the AS' prefixes
At least one router inside AS50344's announced prefix replied during the random-target probe. Hop(s): 2001:67c:26fc:ffff::2. These are candidate targets for direct testing.
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 2026-09-23T10:32:50Z
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 ↗
- ● SRB host (SOX, Belgrade)
- ● DE host (Berlin)
- ● DE host (Düsseldorf)
- ● NL host (go6lab)
- ● ITA host (Karsolink)
- ● SLO host (6connect)
- ● SLO host (T-2)
- ── solid line = echo reply, PTB honored (clean reach)
- — — dashed line = echo reply but PTB not honored (RFC 4890 violation)
- no line = no echo reply (never reached)
- ◉ target: green = clean, amber = reachable-but-violation / unreachable
- ⚠ suspected drop AS
- ⋯ silent (unanswered) hops
- ● IXP hop
From SRB host (SOX, Belgrade) openRFC 4890 ✓
filter likely at: (none) · min PMTU on path: 1500
4/4
Echo small (56B) 17.9ms
4/4
Echo 1500B (DF) 17.9ms
no
Type 1 dest-unreach
-
TCP responds on
Path (traceroute + mtr + PTR)
| # | IP / PTR | RTT | mtr loss | AS | AS holder |
|---|---|---|---|---|---|
| 1 | 2a09:ab81::1 | 0.2ms | 0%* | AS60733 | PERKE-NET - ZORAN PEROVIC trading as Agencija Perke.NET, RS |
| 2 | sox-pn.sox.rs 2001:7f8:1e:8::3a | 0.4ms | 0% | AS13004 | SOX - Serbian Open Exchange DOO, RS |
| 3 | 2001:7f8:1e:8::3d | 0.6ms | 0% | AS13004 | SOX - Serbian Open Exchange DOO, RS |
| 4 | 2a02:2d8:0:a00e:232a | 13.6ms | 0% | - | |
| 5 | 2001:7f8:30:0:2:1:3:4779 | 17.4ms | 0% | - | NA |
| 6 | 2a01-260-1-1--d.core6.t-2.net 2a01:260:1:1::d | 17.7ms | 0%* | AS34779 | T-2-AS - T-2, d.o.o., SI |
| 7 | 2a01-260-1-1--9b.core6.t-2.net 2a01:260:1:1::9b | 18.1ms | 0%* | AS34779 | T-2-AS - T-2, d.o.o., SI |
| 8 | * | - | 0% | - | |
| 9 | * | - | - | - | |
| 10 | * | - | - | - | |
| 11 | * | - | - | - | |
| 12 | * | - | - | - | |
| 13 | * | - | - | - | |
| 14 | * | - | - | - | |
| 15 | * | - | - | - | |
| 16 | * | - | - | - | |
| 17 | * | - | - | - | |
| 18 | * | - | - | - | |
| 19 | * | - | - | - | |
| 20 | * | - | - | - |
tracepath -6
1?: [LOCALHOST] 0.022ms pmtu 1500
1: _gateway 0.404ms
1: _gateway 0.285ms
2: sox-pn.sox.rs 0.620ms
3: 2001:7f8:1e:8::3d 0.382ms asymm 2
4: ae8-930.RT.IRX.VIE.AT.retn.net 12.746ms asymm 3
5: 2001:7f8:30:0:2:1:3:4779 17.464ms asymm 8
6: 2a01-260-1-1--d.core6.t-2.net 17.411ms asymm 7
7: 2a01-260-1-1--9b.core6.t-2.net 17.846ms asymm 9
8: no reply
9: no reply
10: no reply
11: no reply
12: no reply
13: no reply
14: no reply
15: no reply
16: no reply
17: no reply
18: no reply
19: no reply
20: no reply
Too many hops: pmtu 1500
Resume: pmtu 1500 From DE host (Berlin) openRFC 4890 ✓
filter likely at: (none) · min PMTU on path: 1500
4/4
Echo small (56B) 32.2ms
4/4
Echo 1500B (DF) 32.0ms
no
Type 1 dest-unreach
-
TCP responds on
Path (traceroute + mtr + PTR)
| # | IP / PTR | RTT | mtr loss | AS | AS holder |
|---|---|---|---|---|---|
| 1 | xe-0-0-13-178.gw01.ber01.as59645.net 2a06:d1c1:100:b::1 | 0.2ms | 0%* | AS59645 | WYBT-NET - Tobias Fiebig, DE |
| 2 | ae0-2453.cr10.ber01.lwlcom.net 2a06:d1c0::dead:beef:1c02 | 0.5ms | 0%* | AS59645 | WYBT-NET - Tobias Fiebig, DE |
| 3 | ae3-90.cr10.ham01.lwlcom.net 2a00:c380:b200:230::192 | 4.7ms | 0% | AS50629 | LWLCOM - LWLcom GmbH, DE |
| 4 | ae0-50.cr11.ham01.lwlcom.net 2a00:c380:b200:230::45 | 5.0ms | 0% | AS50629 | LWLCOM - LWLcom GmbH, DE |
| 5 | 2a00:c380:f000::4b | 5.1ms | 0% | AS50629 | LWLCOM - LWLcom GmbH, DE |
| 6 | ae4-2087.dus10.core-backbone.com 2a01:4a0:0:2087::33 | 11.2ms | 0% | AS201011 | CORE-BACKBONE - Core-Backbone GmbH, DE |
| 7 | ae21-2071.fra10.core-backbone.com 2a01:4a0:0:2071::4 | 10.5ms | 0% | AS201011 | CORE-BACKBONE - Core-Backbone GmbH, DE |
| 8 | ae2-2021.fra20.core-backbone.com 2a01:4a0:0:2021::4 | 10.6ms | 0% | AS201011 | CORE-BACKBONE - Core-Backbone GmbH, DE |
| 9 | ae6-2003.nbg20.core-backbone.com 2a01:4a0:0:2003::2 | 12.0ms | 0% | AS201011 | CORE-BACKBONE - Core-Backbone GmbH, DE |
| 10 | ae2-2032.muc20.core-backbone.com 2a01:4a0:0:2032::7 | 14.6ms | 0% | AS201011 | CORE-BACKBONE - Core-Backbone GmbH, DE |
| 11 | ae1-2028.vie10.core-backbone.com 2a01:4a0:0:2028::10 | 20.1ms | 0% | AS201011 | CORE-BACKBONE - Core-Backbone GmbH, DE |
| 12 | 2a01:4a0:1338:115::2 | 32.1ms | 0% | AS201011 | CORE-BACKBONE - Core-Backbone GmbH, DE |
| 13 | 2a01-260-1-1--d.core6.t-2.net 2a01:260:1:1::d | 31.4ms | 0%* | AS34779 | T-2-AS - T-2, d.o.o., SI |
| 14 | 2a01-260-1-1--9b.core6.t-2.net 2a01:260:1:1::9b | 32.9ms | 0%* | AS34779 | T-2-AS - T-2, d.o.o., SI |
| 15 | * | - | 10% | - | |
| 16 | * | - | - | - | |
| 17 | * | - | - | - | |
| 18 | * | - | - | - | |
| 19 | * | - | - | - | |
| 20 | * | - | - | - |
Rate-limited ICMPv6: hop 15 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.025ms pmtu 1500
1: xe-0-0-13-178.gw01.ber01.as59645.net 0.534ms
1: xe-0-0-13-178.gw01.ber01.as59645.net 0.543ms
2: ae0-2453.cr10.ber01.lwlcom.net 0.949ms
3: ae3-90.cr10.ham01.lwlcom.net 5.300ms
4: ae0-50.cr11.ham01.lwlcom.net 5.315ms
5: 2a00:c380:f000::4b 5.517ms asymm 4
6: ae4-2087.dus10.core-backbone.com 11.719ms asymm 5
7: ae21-2071.fra10.core-backbone.com 11.286ms asymm 5
8: ae2-2021.fra20.core-backbone.com 11.084ms asymm 4
9: ae6-2003.nbg20.core-backbone.com 12.298ms asymm 6
10: ae2-2032.muc20.core-backbone.com 14.952ms asymm 7
11: ae1-2028.vie10.core-backbone.com 20.555ms asymm 8
12: 2a01:4a0:1338:115::2 32.077ms
13: 2a01-260-1-1--d.core6.t-2.net 31.705ms asymm 11
14: 2a01-260-1-1--9b.core6.t-2.net 33.158ms asymm 13
15: no reply
16: no reply
17: no reply
18: no reply
19: no reply
20: no reply
Too many hops: pmtu 1500
Resume: pmtu 1500 From DE host (Düsseldorf) openRFC 4890 ✓
filter likely at: (none) · min PMTU on path: 1500
3/4
Echo small (56B) 28.6ms
4/4
Echo 1500B (DF) 28.7ms
no
Type 1 dest-unreach
-
TCP responds on
Path (traceroute + mtr + PTR)
| # | IP / PTR | RTT | mtr loss | AS | AS holder |
|---|---|---|---|---|---|
| 1 | xe-0-0-12-142.gw01.dus01.as59645.net 2a06:d1c1:100:d::1 | 9.7ms | 0%* | AS59645 | WYBT-NET - Tobias Fiebig, DE |
| 2 | ipv6.decix-dusseldorf.core1.dus1.he.net 2001:7f8:9e::1b1b:0:1 | 7.4ms | 0% | - | NA |
| 3 | * | - | - | - | |
| 4 | be6.core2.ams2.he.net 2001:470:0:61c::2 | 9.2ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 5 | t-2.interxionfra11.nlsix.net 2001:7f8:13::a503:4779:1 | 33.6ms | 0% | - | NA |
| 6 | 2a01-260-1-1--9d.core6.t-2.net 2a01:260:1:1::9d | 33.8ms | 0%* | AS34779 | T-2-AS - T-2, d.o.o., SI |
| 7 | * | - | 0% | - | |
| 8 | * | - | - | - | |
| 9 | * | - | - | - | |
| 10 | * | - | - | - | |
| 11 | * | - | - | - | |
| 12 | * | - | - | - | |
| 13 | * | - | - | - | |
| 14 | * | - | - | - | |
| 15 | * | - | - | - | |
| 16 | * | - | - | - | |
| 17 | * | - | - | - | |
| 18 | * | - | - | - | |
| 19 | * | - | - | - | |
| 20 | * | - | - | - |
tracepath -6
1?: [LOCALHOST] 0.026ms pmtu 1500
1: xe-0-0-12-142.gw01.dus01.as59645.net 0.436ms
1: xe-0-0-12-142.gw01.dus01.as59645.net 0.298ms
2: ipv6.decix-dusseldorf.core1.dus1.he.net 7.321ms asymm 3
3: no reply
4: be6.core2.ams2.he.net 9.525ms asymm 6
5: t-2.interxionfra11.nlsix.net 32.087ms asymm 11
6: 2a01-260-1-1--9d.core6.t-2.net 34.076ms asymm 12
7: no reply
8: no reply
9: no reply
10: no reply
11: no reply
12: no reply
13: no reply
14: no reply
15: no reply
16: no reply
17: no reply
18: no reply
19: no reply
20: no reply
Too many hops: pmtu 1500
Resume: pmtu 1500 From NL host (go6lab) openRFC 4890 ✓
filter likely at: (none) · min PMTU on path: 1500
4/4
Echo small (56B) 50.5ms
4/4
Echo 1500B (DF) 39.7ms
no
Type 1 dest-unreach
-
TCP responds on
Path (traceroute + mtr + PTR)
| # | IP / PTR | RTT | mtr loss | AS | AS holder |
|---|---|---|---|---|---|
| 1 | 2a00:8642:42::2 | 1.0ms | 0% | AS203993 | GNA-DC1-AS - S.J.M. Steffann, NL |
| 2 | * | - | 0%* | - | |
| 3 | 2a00:1ca8:1::194 | 3.8ms | 0% | AS50673 | Serverius-as - Serverius Holding B.V., NL |
| 4 | 2a03:3f40::10:33 | 4.7ms | 0% | AS50673 | Serverius-as - Serverius Holding B.V., NL |
| 5 | t-2.interxionfra11.nlsix.net 2001:7f8:13::a503:4779:1 | 39.9ms | 0% | - | NA |
| 6 | 2a01-260-1-1--9d.core6.t-2.net 2a01:260:1:1::9d | 41.7ms | 0%* | AS34779 | T-2-AS - T-2, d.o.o., SI |
| 7 | * | - | 0% | - | |
| 8 | * | - | - | - | |
| 9 | * | - | - | - | |
| 10 | * | - | - | - | |
| 11 | * | - | - | - | |
| 12 | * | - | - | - | |
| 13 | * | - | - | - | |
| 14 | * | - | - | - | |
| 15 | * | - | - | - | |
| 16 | * | - | - | - | |
| 17 | * | - | - | - | |
| 18 | * | - | - | - | |
| 19 | * | - | - | - | |
| 20 | * | - | - | - |
tracepath -6
1?: [LOCALHOST] 0.037ms pmtu 1500
1: 2a00:8642:42::2 2.800ms
1: 2a00:8642:42::2 4.483ms
2: no reply
3: 2a00:1ca8:1::194 2.656ms
4: 2a03:3f40::10:33 6.834ms
5: t-2.interxionfra11.nlsix.net 40.587ms asymm 6
6: 2a01-260-1-1--9d.core6.t-2.net 38.783ms asymm 7
7: no reply
8: no reply
9: no reply
10: no reply
11: no reply
12: no reply
13: no reply
14: no reply
15: no reply
16: no reply
17: no reply
18: no reply
19: no reply
20: no reply
Too many hops: pmtu 1500
Resume: pmtu 1500 From ITA host (Karsolink) openRFC 4890 ✓
filter likely at: (none) · min PMTU on path: 1500
4/4
Echo small (56B) 39.3ms
4/4
Echo 1500B (DF) 39.4ms
no
Type 1 dest-unreach
-
TCP responds on
Path (traceroute + mtr + PTR)
| # | IP / PTR | RTT | mtr loss | AS | AS holder |
|---|---|---|---|---|---|
| 1 | * | - | - | - | |
| 2 | * | - | - | - | |
| 3 | * | - | - | - | |
| 4 | * | - | - | - | |
| 5 | 100ge0-0-0-20.core1.vie1.he.net 2001:470:0:414::1 | 23.7ms | 20% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 6 | 2001:7f8:30:0:2:1:3:4779 | 20.0ms | 0% | - | NA |
| 7 | 2a01-260-1-1--d.core6.t-2.net 2a01:260:1:1::d | 44.4ms | 0%* | AS34779 | T-2-AS - T-2, d.o.o., SI |
| 8 | 2a01-260-1-1--9b.core6.t-2.net 2a01:260:1:1::9b | 43.2ms | 0%* | AS34779 | T-2-AS - T-2, d.o.o., SI |
| 9 | * | - | 0% | - | |
| 10 | * | - | - | - | |
| 11 | * | - | - | - | |
| 12 | * | - | - | - | |
| 13 | * | - | - | - | |
| 14 | * | - | - | - | |
| 15 | * | - | - | - | |
| 16 | * | - | - | - | |
| 17 | * | - | - | - | |
| 18 | * | - | - | - | |
| 19 | * | - | - | - | |
| 20 | * | - | - | - |
Rate-limited ICMPv6: hop 5 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.031ms pmtu 1500
1: karsolink-01.net.karsolink.com 0.959ms
1: karsolink-01.net.karsolink.com 0.853ms
2: 2a12:d8c0:109f:121::a1 0.746ms
3: 2a12:d8c0:101f:103::1 8.887ms
4: no reply
5: 100ge0-0-0-20.core1.vie1.he.net 21.410ms
6: 2001:7f8:30:0:2:1:3:4779 19.707ms
7: 2a01-260-1-1--d.core6.t-2.net 44.962ms asymm 11
8: 2a01-260-1-1--9b.core6.t-2.net 43.154ms asymm 11
9: no reply
10: no reply
11: no reply
12: no reply
13: no reply
14: no reply
15: no reply
16: no reply
17: no reply
18: no reply
19: no reply
20: no reply
Too many hops: pmtu 1500
Resume: pmtu 1500 From SLO host (6connect) openRFC 4890 ✓
filter likely at: (none) · min PMTU on path: 1500
4/4
Echo small (56B) 1.4ms
4/4
Echo 1500B (DF) 1.3ms
no
Type 1 dest-unreach
-
TCP responds on
Path (traceroute + mtr + PTR)
| # | IP / PTR | RTT | mtr loss | AS | AS holder |
|---|---|---|---|---|---|
| 1 | fw1-lju.6connect.com 2607:fae0:a000::2 | 0.3ms | 0%* | AS8038 | 6CONNECT - 6connect, Inc., US |
| 2 | * | - | - | - | |
| 3 | * | - | 80% | - | |
| 4 | six.t-2.si @SIX 2001:7f8:46::3:4779 | 1.3ms | 0% | AS34779 | T-2 |
| 5 | 2a01-260-1-1--9b.core6.t-2.net 2a01:260:1:1::9b | 1.4ms | 0%* | AS34779 | T-2-AS - T-2, d.o.o., SI |
| 6 | * | - | 0% | - | |
| 7 | * | - | - | - | |
| 8 | * | - | - | - | |
| 9 | * | - | - | - | |
| 10 | * | - | - | - | |
| 11 | * | - | - | - | |
| 12 | * | - | - | - | |
| 13 | * | - | - | - | |
| 14 | * | - | - | - | |
| 15 | * | - | - | - | |
| 16 | * | - | - | - | |
| 17 | * | - | - | - | |
| 18 | * | - | - | - | |
| 19 | * | - | - | - | |
| 20 | * | - | - | - |
Rate-limited ICMPv6: hop 3 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.027ms pmtu 9000
1: fw1-lju.6connect.com 0.734ms
1: fw1-lju.6connect.com 0.590ms
2: no reply
3: 2a03:a100:0:201:1::1 1.044ms
4: 2a03:a100:0:201:1::1 1.163ms pmtu 1500
4: six.t-2.si 1.315ms
5: 2a01-260-1-1--9b.core6.t-2.net 1.763ms
6: no reply
7: no reply
8: no reply
9: no reply
10: no reply
11: no reply
12: no reply
13: no reply
14: no reply
15: no reply
16: no reply
17: no reply
18: no reply
19: no reply
20: no reply
Too many hops: pmtu 1500From SLO host (T-2) openRFC 4890 ✓
filter likely at: (none) · min PMTU on path: 1500
4/4
Echo small (56B) 1.7ms
4/4
Echo 1500B (DF) 2.0ms
no
Type 1 dest-unreach
-
TCP responds on
Path (traceroute + mtr + PTR)
| # | IP / PTR | RTT | mtr loss | AS | AS holder |
|---|---|---|---|---|---|
| 1 | * | - | - | - | |
| 2 | 2a01:260:1::225 | 14.9ms | 0%* | AS34779 | T-2-AS - T-2, d.o.o., SI |
| 3 | * | - | 0% | - | |
| 4 | * | - | - | - | |
| 5 | * | - | - | - | |
| 6 | * | - | - | - | |
| 7 | * | - | - | - | |
| 8 | * | - | - | - | |
| 9 | * | - | - | - | |
| 10 | * | - | - | - | |
| 11 | * | - | - | - | |
| 12 | * | - | - | - | |
| 13 | * | - | - | - | |
| 14 | * | - | - | - | |
| 15 | * | - | - | - | |
| 16 | * | - | - | - | |
| 17 | * | - | - | - | |
| 18 | * | - | - | - | |
| 19 | * | - | - | - | |
| 20 | * | - | - | - |
tracepath -6
1?: [LOCALHOST] 0.025ms pmtu 1500
1: 2a01:261:313:b814::1 0.891ms
2: 2a01:260:1::225 4.572ms
3: no reply
4: no reply
5: no reply
6: no reply
7: no reply
8: no reply
9: no reply
10: no reply
11: no reply
12: no reply
13: no reply
14: no reply
15: no reply
16: no reply
17: no reply
18: no reply
19: no reply
20: no reply
Too many hops: pmtu 1500
Resume: pmtu 1500