AS209387 NEMEXI NEMEXI SRL

AS overview

Test target: 2a09:5dc3:ffff::1 · static prefix probe · address space: PA · prefixes announced: 1

prefix(es): 2a09:5dc3:ffff::/48

Targets & per-vantage-point probe results (1 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)
Target IP / hostname	Source	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
`2a09:5dc3:ffff::1`	prb	✓	✓	refused	refused	✓	✓	✓	refused	refused	✓	✓	✓	refused	refused	✓	✓	✓	?	?	✓	✓	✓	refused	refused	✓	✓	✓	refused	refused	✓	✓	✓	refused	refused	-

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

Not an MIX-IT / NAMEX / MINAP / TOP-IX / VSIX / EQUINIX-MILAN / BGPX-ROME / NAMEX-BARI / PCIX / DECIX-PALERMO member, but our traceroute path crosses the MIX-IT / NAMEX / MINAP / TOP-IX / VSIX / EQUINIX-MILAN / BGPX-ROME / NAMEX-BARI / PCIX / DECIX-PALERMO LAN from DE host (Düsseldorf), ITA host (Karsolink), SLO host (6connect), SLO host (T-2) - reached via an MIX-IT / NAMEX / MINAP / TOP-IX / VSIX / EQUINIX-MILAN / BGPX-ROME / NAMEX-BARI / PCIX / DECIX-PALERMO-resident transit operator.

RPKI & ASPA

1 of 1 prefix(es) covered by a valid ROA.

Prefix	RPKI state	Reason	Covering VRP(s)
`2a09:5dc3:ffff::/48`	✓ valid	matched VRP (correct origin, length within maxLength)	AS209387 /48 maxLen 48 (ripe); AS44084 /30 maxLen 30 (ripe)

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 2026-09-23T12:05:59Z

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) 45.8ms

4/4

Echo 1500B (DF) 45.9ms

yes

Type 1 dest-unreach

443,80

TCP responds on

Path (traceroute + mtr + PTR)

#	IP / PTR	RTT	mtr loss	AS	AS holder
1	2a09:ab81::1	0.3ms	0%*	AS60733	PERKE-NET - ZORAN PEROVIC trading as Agencija Perke.NET, RS
2	sox-pn.sox.rs 2001:7f8:1e:8::3a	0.5ms	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	12.7ms	0%	-
5	RT.TC2.AMS.NL.retn.net 2a02:2d8::57f5:e0b4	28.6ms	0%	AS9002	RETN-AS - RETN Limited, GB
6	ams-ix.ipv6.itgate.net 2001:7f8:1::a501:2779:1	30.1ms	0%	-	NA
7	be12.Woogie.core.MIL2.ipv6.ITgate.net 2001:1418:1::f2	38.8ms	0%	AS12779	ITGATE - IT.Gate S.p.A., IT
8	multiwire-MIL-gw6.customer.itgate.net 2001:1418:9:1::82	38.5ms	0%	AS12779	ITGATE - IT.Gate S.p.A., IT
9	2a09:6240:0:7::1	45.5ms	0%	AS44084	MULTIWIRE-AS - Multiwire S.r.l., IT
10	2a09:5dc3:ffff::1	46.0ms	0%	AS209387	NEMEXI - NEMEXI SRL, IT

tracepath -6

 1?: [LOCALHOST]                        0.023ms pmtu 1500
 1:  _gateway                                              0.788ms 
 1:  _gateway                                              0.523ms 
 2:  sox-pn.sox.rs                                         0.516ms 
 3:  2001:7f8:1e:8::3d                                     0.641ms asymm  2 
 4:  ae8-930.RT.IRX.VIE.AT.retn.net                       12.963ms asymm  3 
 5:  RT.TC2.AMS.NL.retn.net                               29.069ms 
 6:  ams-ix.ipv6.itgate.net                               30.486ms 
 7:  be12.Woogie.core.MIL2.ipv6.ITgate.net                38.910ms asymm  5 
 8:  multiwire-MIL-gw6.customer.itgate.net                38.661ms asymm  5 
 9:  2a09:6240:0:7::1                                     45.983ms asymm  6 
10:  2a09:5dc3:ffff::1                                    46.098ms reached
     Resume: pmtu 1500 hops 10 back 7

From DE host (Berlin) openRFC 4890 ✓

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

4/4

Echo small (56B) 32.3ms

4/4

Echo 1500B (DF) 32.6ms

yes

Type 1 dest-unreach

443,80

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	0.3ms	0%*	AS59645	WYBT-NET - Tobias Fiebig, DE
2	ae0-2453.cr10.ber01.lwlcom.net 2a06:d1c0::dead:beef:1c02	0.7ms	0%*	AS59645	WYBT-NET - Tobias Fiebig, DE
3	ae0-150.cr10.fra01.lwlcom.net 2a00:c380:b200:230::174	11.8ms	0%	AS50629	LWLCOM - LWLcom GmbH, DE
4	ae0-100.cr10.fra02.lwlcom.net 2a00:c380:b200:230::215	10.2ms	0%	AS50629	LWLCOM - LWLcom GmbH, DE
5	ae0-10.cr10.fra06.lwlcom.net 2a00:c380:b200:230::236	10.1ms	0%	AS50629	LWLCOM - LWLcom GmbH, DE
6	ams-ix.1-ix.net 2001:7f8:115:1::7	25.6ms	0%	-	NA
7	ams-ix.ipv6.itgate.net 2001:7f8:1::a501:2779:1	22.5ms	0%	-	NA
8	be12.Woogie.core.MIL2.ipv6.ITgate.net 2001:1418:1::f2	25.2ms	0%	AS12779	ITGATE - IT.Gate S.p.A., IT
9	multiwire-MIL-gw6.customer.itgate.net 2001:1418:9:1::82	25.2ms	0%	AS12779	ITGATE - IT.Gate S.p.A., IT
10	2a09:6240:0:7::1	32.2ms	0%	AS44084	MULTIWIRE-AS - Multiwire S.r.l., IT
11	2a09:5dc3:ffff::1	32.3ms	0%	AS209387	NEMEXI - NEMEXI SRL, IT

tracepath -6

 1?: [LOCALHOST]                        0.021ms pmtu 1500
 1:  xe-0-0-13-178.gw01.ber01.as59645.net                  0.616ms 
 1:  xe-0-0-13-178.gw01.ber01.as59645.net                  0.502ms 
 2:  ae0-2453.cr10.ber01.lwlcom.net                        1.246ms 
 3:  ae0-150.cr10.fra01.lwlcom.net                        10.589ms asymm  7 
 4:  ae0-100.cr10.fra02.lwlcom.net                        10.525ms asymm  8 
 5:  ae0-10.cr10.fra06.lwlcom.net                         10.337ms asymm  7 
 6:  ams-ix.1-ix.net                                      16.539ms asymm  8 
 7:  ams-ix.ipv6.itgate.net                               22.733ms asymm  6 
 8:  be12.Woogie.core.MIL2.ipv6.ITgate.net                25.321ms 
 9:  multiwire-MIL-gw6.customer.itgate.net                25.327ms asymm 11 
10:  2a09:6240:0:7::1                                     32.374ms asymm 12 
11:  2a09:5dc3:ffff::1                                    32.984ms reached
     Resume: pmtu 1500 hops 11 back 13

From DE host (Düsseldorf) openRFC 4890 ✓

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

4/4

Echo small (56B) 27.7ms

4/4

Echo 1500B (DF) 27.6ms

yes

Type 1 dest-unreach

443,80

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	0.2ms	0%*	AS59645	WYBT-NET - Tobias Fiebig, DE
2	eth1-0-12-h5594.edge5-dus1.bb.wiit.network 2001:4ba0:92f4:3::1	1.0ms	0%	AS24961	MYLOC-AS - WIIT AG, DE
3	*	-	-	-
4	lag30.core3-dus1.bb.wiit.network 2001:4ba0:ffe9:109::2	0.3ms	0%	AS24961	MYLOC-AS - WIIT AG, DE
5	lag0-vl1011.core1-fra-ix.bb.wiit.network 2001:4ba0:ffe9:8a::2	4.4ms	0%	AS24961	MYLOC-AS - WIIT AG, DE
6	lag0-vl1001.core1-nbg-ncd.bb.wiit.network 2001:4ba0:ffe9:103e::1	6.9ms	0%	AS24961	MYLOC-AS - WIIT AG, DE
7	lag0-vl6.core2-nbg-ncd.bb.wiit.network 2001:4ba0:ffe9:103b::1	7.0ms	0%	AS24961	MYLOC-AS - WIIT AG, DE
8	2001:4ba0:ffe9:b8	9.7ms	0%	-
9	lag0-vl1009.core1-muc-eq3.bb.wiit.network 2001:4ba0:ffe9:a7::1	9.6ms	0%	AS24961	MYLOC-AS - WIIT AG, DE
10	lag0-vl1001.core1-pda-vsix.bb.wiit.network 2001:4ba0:ffe9:da::2	20.3ms	0%	AS24961	MYLOC-AS - WIIT AG, DE
11	lag0-vl1001.core1-mil-mix.bb.wiit.network 2001:4ba0:ffe9:db::2	20.2ms	0%	AS24961	MYLOC-AS - WIIT AG, DE
12	multiwire-AS44084.mix-it.net @MIX-IT / NAMEX / MINAP / TOP-IX / VSIX / EQUINIX-MILAN / BGPX-ROME / NAMEX-BARI / PCIX / DECIX-PALERMO 2001:7f8:b:100:1d1:a5d4:4084:69	20.2ms	0%	-	NA
13	2a09:6240:0:7::1	27.2ms	0%	AS44084	MULTIWIRE-AS - Multiwire S.r.l., IT
14	2a09:5dc3:ffff::1	27.4ms	0%	AS209387	NEMEXI - NEMEXI SRL, IT

tracepath -6

 1?: [LOCALHOST]                        0.024ms pmtu 1500
 1:  xe-0-0-12-142.gw01.dus01.as59645.net                  0.333ms 
 1:  xe-0-0-12-142.gw01.dus01.as59645.net                  0.288ms 
 2:  eth1-0-12-h5594.edge5-dus1.bb.wiit.network            1.142ms 
 3:  no reply
 4:  lag30.core3-dus1.bb.wiit.network                      0.433ms 
 5:  lag0-vl1011.core1-fra-ix.bb.wiit.network              4.431ms 
 6:  lag0-vl1001.core1-nbg-ncd.bb.wiit.network             7.057ms 
 7:  lag0-vl6.core2-nbg-ncd.bb.wiit.network                7.135ms 
 8:  lag0-vl1006.core2-muc2.bb.wiit.network                9.624ms 
 9:  lag0-vl1009.core1-muc-eq3.bb.wiit.network             9.837ms 
10:  lag0-vl1001.core1-pda-vsix.bb.wiit.network           20.335ms 
11:  lag0-vl1001.core1-mil-mix.bb.wiit.network            20.337ms asymm  9 
12:  multiwire-AS44084.mix-it.net                         20.242ms asymm 10 
13:  2a09:6240:0:7::1                                     27.607ms asymm 11 
14:  2a09:5dc3:ffff::1                                    27.851ms reached
     Resume: pmtu 1500 hops 14 back 12

From NL host (go6lab) openRFC 4890 ✓

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

4/4

Echo small (56B) 29.6ms

4/4

Echo 1500B (DF) 28.6ms

yes

Type 1 dest-unreach

TCP responds on

Path (traceroute + mtr + PTR)

#	IP / PTR	RTT	mtr loss	AS	AS holder
1	2a00:8642:42::2	1.6ms	0%	AS203993	GNA-DC1-AS - S.J.M. Steffann, NL
2	gw.friends.steffann.nl 2a00:8642:1000:f000::1	3.4ms	0%*	AS203993	GNA-DC1-AS - S.J.M. Steffann, NL
3	ccr2-ccr1.dc1.nogalliance.org 2a00:8642:dc1:2::b	3.4ms	0%	AS203993	GNA-DC1-AS - S.J.M. Steffann, NL
4	ams-ix.ipv6.itgate.net 2001:7f8:1::a501:2779:1	4.8ms	10%	-	NA
5	be12.Woogie.core.MIL2.ipv6.ITgate.net 2001:1418:1::f2	20.1ms	0%	AS12779	ITGATE - IT.Gate S.p.A., IT
6	multiwire-MIL-gw6.customer.itgate.net 2001:1418:9:1::82	20.4ms	0%	AS12779	ITGATE - IT.Gate S.p.A., IT
7	2a09:6240:0:7::1	27.6ms	0%	AS44084	MULTIWIRE-AS - Multiwire S.r.l., IT
8	2a09:5dc3:ffff::1	29.0ms	0%	AS209387	NEMEXI - NEMEXI SRL, IT

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

tracepath -6

 1?: [LOCALHOST]                        0.028ms pmtu 1500
 1:  2a00:8642:42::2                                       1.373ms 
 1:  2a00:8642:42::2                                       2.153ms 
 2:  no reply
 3:  ccr2-ccr1.dc1.nogalliance.org                         5.498ms asymm  2 
 4:  ams-ix.ipv6.itgate.net                                7.668ms asymm  3 
 5:  be12.Woogie.core.MIL2.ipv6.ITgate.net                20.439ms asymm  4 
 6:  multiwire-MIL-gw6.customer.itgate.net                20.546ms asymm  5 
 7:  2a09:6240:0:7::1                                     26.386ms asymm  6 
 8:  2a09:5dc3:ffff::1                                    28.301ms reached
     Resume: pmtu 1500 hops 8 back 7

From ITA host (Karsolink) openRFC 4890 ✓

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

4/4

Echo small (56B) 16.2ms

3/4

Echo 1500B (DF) 16.2ms

yes

Type 1 dest-unreach

443,80

TCP responds on

Path (traceroute + mtr + PTR)

#	IP / PTR	RTT	mtr loss	AS	AS holder
1	karsolink-01.net.karsolink.com 2a12:d8c0:105a:9001::1	0.4ms	-	AS204471	KARSOLINK - 2S Computers SRL, IT
2	2a12:d8c0:109f:121::a1	0.3ms	0%*	AS204471	KARSOLINK - 2S Computers SRL, IT
3	*	-	-	-
4	multiwire-AS44084.mix-it.net @MIX-IT / NAMEX / MINAP / TOP-IX / VSIX / EQUINIX-MILAN / BGPX-ROME / NAMEX-BARI / PCIX / DECIX-PALERMO 2001:7f8:b:100:1d1:a5d4:4084:69	8.7ms	0%	-	NA
5	2a09:6240:0:7::1	15.7ms	0%	AS44084	MULTIWIRE-AS - Multiwire S.r.l., IT
6	2a09:5dc3:ffff::1	15.9ms	0%	AS209387	NEMEXI - NEMEXI SRL, IT

tracepath -6

 1?: [LOCALHOST]                        0.029ms pmtu 1500
 1:  no reply
 2:  2a12:d8c0:109f:121::a1                                0.753ms 
 3:  no reply
 4:  multiwire-as44084.mix-it.net                          9.415ms 
 5:  2a09:6240:0:7::1                                     16.428ms 
 6:  2a09:5dc3:ffff::1                                    16.428ms reached
     Resume: pmtu 1500 hops 6 back 6

From SLO host (6connect) openRFC 4890 ✓

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

4/4

Echo small (56B) 17.6ms

4/4

Echo 1500B (DF) 18.3ms

yes

Type 1 dest-unreach

443,80

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	2a03:a100:0:201:1::1	0.8ms	0%	AS56635	XENYA - XENYA inzeniring, proizvodnja in trgovina, d.o.o. Ljubljana, SI
4	e0-1.core1.lju1.he.net 2001:470:1:5be::1	2.1ms	20%	AS6939	HURRICANE - Hurricane Electric LLC, US
5	*	-	-	-
6	*	-	30%	-
7	*	-	-	-
8	multiwire-AS44084.mix-it.net @MIX-IT / NAMEX / MINAP / TOP-IX / VSIX / EQUINIX-MILAN / BGPX-ROME / NAMEX-BARI / PCIX / DECIX-PALERMO 2001:7f8:b:100:1d1:a5d4:4084:69	13.6ms	0%	-	NA
9	2a09:6240:0:7::1	17.3ms	0%	AS44084	MULTIWIRE-AS - Multiwire S.r.l., IT
10	2a09:5dc3:ffff::1	17.6ms	0%	AS209387	NEMEXI - NEMEXI SRL, 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]                        0.043ms pmtu 9000
 1:  fw1-lju.6connect.com                                  0.554ms 
 1:  fw1-lju.6connect.com                                  0.516ms 
 2:  no reply
 3:  2a03:a100:0:201:1::1                                  1.325ms 
 4:  2a03:a100:0:201:1::1                                  1.061ms pmtu 1500
 4:  e0-1.core1.lju1.he.net                                2.225ms 
 5:  no reply
 6:  port-channel1.core1.zag2.he.net                       4.452ms 
 7:  no reply
 8:  multiwire-AS44084.mix-it.net                         10.835ms asymm  6 
 9:  2a09:6240:0:7::1                                     17.265ms asymm  7 
10:  2a09:5dc3:ffff::1                                    18.102ms reached
     Resume: pmtu 1500 hops 10 back 8

From SLO host (T-2) openRFC 4890 ✓

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

4/4

Echo small (56B) 41.0ms

4/4

Echo 1500B (DF) 41.0ms

yes

Type 1 dest-unreach

443,80

TCP responds on

Path (traceroute + mtr + PTR)

#	IP / PTR	RTT	mtr loss	AS	AS holder
1	*	-	0%*	-
2	2a01:260:1::225	6.6ms	0%*	AS34779	T-2-AS - T-2, d.o.o., SI
3	2a01-260-1-1--9a.core6.t-2.net 2a01:260:1:1::9a	12.5ms	0%*	AS34779	T-2-AS - T-2, d.o.o., SI
4	hurricane-electric.nikhef.nlsix.net 2001:7f8:13::a500:6939:1	154.5ms	0%*	-	NA
5	be7.core2.fra2.he.net 2001:470:e:18::2	154.6ms	0%	AS6939	HURRICANE - Hurricane Electric LLC, US
6	be3.core4.fra1.he.net 2001:470:e:5a::2	153.5ms	10%	AS6939	HURRICANE - Hurricane Electric LLC, US
7	be3.core4.fra1.he.net 2001:470:e:5a::2	153.5ms	30%	AS6939	HURRICANE - Hurricane Electric LLC, US
8	be1.core1.mil2.he.net 2001:470:e:dd::1	153.4ms	0%	AS6939	HURRICANE - Hurricane Electric LLC, US
9	*	-	0%	-
10	multiwire-AS44084.mix-it.net @MIX-IT / NAMEX / MINAP / TOP-IX / VSIX / EQUINIX-MILAN / BGPX-ROME / NAMEX-BARI / PCIX / DECIX-PALERMO 2001:7f8:b:100:1d1:a5d4:4084:69	146.8ms	-	-	NA
11	multiwire-AS44084.mix-it.net @MIX-IT / NAMEX / MINAP / TOP-IX / VSIX / EQUINIX-MILAN / BGPX-ROME / NAMEX-BARI / PCIX / DECIX-PALERMO 2001:7f8:b:100:1d1:a5d4:4084:69	141.0ms	0%	-	NA
12	2a09:6240:0:7::1	43.8ms	0%	AS44084	MULTIWIRE-AS - Multiwire S.r.l., IT

Rate-limited ICMPv6: hop 6, hop 7 (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                                       9.221ms 
 3:  2a01-260-1-1--9a.core6.t-2.net                        3.858ms 
 4:  2a01-260-1-1--39.core6.t-2.net                        2.604ms asymm  3 
 5:  hurricane-electric.nikhef.nlsix.net                  36.325ms asymm  4 
 6:  be3.core4.fra1.he.net                                49.279ms asymm  7 
 7:  be3.core4.fra1.he.net                                46.696ms 
 8:  be10.core1.zrh2.he.net                               50.541ms 
 9:  be1.core1.mil2.he.net                                38.887ms asymm  7 
10:  multiwire-AS44084.mix-it.net                         36.500ms asymm  7 
11:  multiwire-AS44084.mix-it.net                         36.696ms asymm  7 
12:  2a09:5dc3:ffff::1                                    39.849ms reached
     Resume: pmtu 1500 hops 12 back 9