AS overview
Test target: 2a01:190:15e8:100::30 · ns3.nextlayer.com · address space: unknown · prefixes announced: 1
prefix(es): 2a01:190:15e8::/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 | ||
2a01:190:15e8:100::30ns3.nextlayer.com | NS | ✓ | ✓ | ? | ? | - | ✓ | ✓ | ? | ? | - | ✓ | ✓ | ? | ? | - | ✓ | ✓ | ? | ? | - | ✓ | ✓ | ? | ? | - | ✓ | ✓ | ? | ? | - | ✓ | ✓ | ? | ? | - |
2a01:190:15e8:101::203nextlayer.at | DMARC | ✓ | ✓ | open | open | ✓ | ✓ | ✓ | open | open | ✓ | ✓ | ✓ | open | open | - | ✓ | ✓ | open | open | ✓ | ✓ | ✓ | open | open | ✓ | ✓ | ✓ | open | open | ✓ | ✓ | ✓ | open | open | ✓ |
VIX / AAIX / SAIX / TIROL-IX / ERA-IX peering
Not an VIX / AAIX / SAIX / TIROL-IX / ERA-IX member, but our traceroute path crosses the VIX / AAIX / SAIX / TIROL-IX / ERA-IX LAN from SRB host (SOX, Belgrade), SLO host (T-2) - reached via an VIX / AAIX / SAIX / TIROL-IX / ERA-IX-resident transit operator.
RPKI & ASPA
1 of 1 prefix(es) covered by a valid ROA.
| Prefix | RPKI state | Reason | Covering VRP(s) |
|---|---|---|---|
2a01:190:15e8::/48 | ✓ valid | matched VRP (correct origin, length within maxLength) | AS29330 /48 maxLen 48 (ripe); AS1764 /29 maxLen 32 (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 2026-09-23T13:33:28Z
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 2a01:190:15e8:101::203
amsterdam - verdict ?
(no hops captured)
belgrade - verdict honored
verdict = honored; final pmtu = 1500
| # | hop IP | pmtu change |
|---|---|---|
| 1 | <span class='muted'>no reply</span> | |
| 2 | 2001:7f8:1e::4 | |
| 3 | 2001:7f8:30:0:2:1:0:8218 | |
| 4 | 2001:1b48:2:107::4:2 | |
| 5 | 2a01:190:15e8:101::203 |
berlin - verdict honored
verdict = honored; final pmtu = 1500
| # | hop IP | pmtu change |
|---|---|---|
| 1 | <span class='muted'>no reply</span> | |
| 2 | 2a06:d1c0::dead:beef:1c02 | |
| 3 | 2001:7f8:19:1::201a:1 | |
| 4 | 2001:1b48:2:2::6:2 | |
| 5 | 2001:1b48:2:107::4:2 | |
| 6 | 2a01:190:15e8:101::203 |
duseldorf - verdict honored
verdict = honored; final pmtu = 1500
| # | hop IP | pmtu change |
|---|---|---|
| 1 | <span class='muted'>no reply</span> | |
| 2 | 2001:4ba0:92f4:3::1 | |
| 3 | <span class='muted'>no reply</span> | |
| 4 | 2001:4ba0:ffe9:109::2 | |
| 5 | 2001:4ba0:ffe9:4f::1 | |
| 6 | 2001:7f8::201a:0:1 | |
| 7 | 2001:1b48:2:3::36:2 | |
| 8 | 2001:1b48:2:2::e:2 | |
| 9 | 2a01:190:15e8:101::203 |
go6lab - verdict not_honored
verdict = not_honored; final pmtu = 1500
| # | hop IP | pmtu change |
|---|---|---|
| 1 | <span class='muted'>no reply</span> | |
| 2 | 2a00:8642:1000:f000::1 | |
| 3 | 2a00:8642:dc1:2::b | |
| 4 | 2001:7f8:1::a500:1764:1 | |
| 5 | 2a01:190:1764:800a::1 | |
| 6 | <span class='muted'>no reply</span> | |
| 7 | 2a01:190:15e8:101::203 |
karsolink - verdict honored
verdict = honored; final pmtu = 1500
| # | hop IP | pmtu change |
|---|---|---|
| 1 | <span class='muted'>no reply</span> | |
| 2 | 2a12:d8c0:109f:121::a1 | |
| 3 | 2a12:d8c0:101f:103::1 | |
| 4 | 2001:7f8:b:100:1d1:a5d0:8218:208 | |
| 5 | 2001:1b48:2:c::1:1 | |
| 6 | 2001:1b48:2:2::9:1 | |
| 7 | 2001:1b48:2:107::19:2 | |
| 8 | 2a01:190:15e8:101::203 |
odin - verdict honored
verdict = honored; final pmtu = 1500
| # | hop IP | pmtu change |
|---|---|---|
| 1 | <span class='muted'>no reply</span> | |
| 2 | 2607:fae0:a000:2::2 | |
| 3 | 2a00:ee1:800:9::1 | |
| 4 | 2a00:ee0:1:10::2 | |
| 5 | 2a00:ee0:1:10::2 | |
| 6 | 2001:1b48:2:2::6:2 | |
| 7 | 2001:1b48:2:107::4:2 | |
| 8 | 2a01:190:15e8:101::203 |
t2 - verdict honored
verdict = honored; final pmtu = 1500
| # | hop IP | pmtu change |
|---|---|---|
| 1 | <span class='muted'>no reply</span> | |
| 2 | 2a01:260:1::225 | |
| 3 | 2a01:260:1:1::9c | |
| 4 | 2a01:260:1:1::25 | |
| 5 | 2001:7f8:30:0:2:1:0:8218 | |
| 6 | 2001:1b48:2:107::4:2 | |
| 7 | 2a01:190:15e8:101::203 |
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
Path (traceroute + mtr + PTR)
| # | IP / PTR | RTT | mtr loss | AS | AS holder |
|---|---|---|---|---|---|
| 1 | 2a09:ab81::1 | 0.4ms | 0%* | AS60733 | PERKE-NET - ZORAN PEROVIC trading as Agencija Perke.NET, RS |
| 2 | 2001:7f8:1e::4 | 0.4ms | 0% | AS13004 | SOX - Serbian Open Exchange DOO, RS |
| 3 | 2001:7f8:30:0:2:1:0:8218 @VIX / AAIX / SAIX / TIROL-IX / ERA-IX | 12.7ms | 0% | - | NA |
| 4 | 2001:1b48:2:107::4:2 | 12.8ms | 0% | AS8218 | NEO-ASN - Zayo Infrastructure France SA, FR |
| 5 | * | - | 0% | - | |
| 6 | * | - | - | - | |
| 7 | * | - | - | - | |
| 8 | * | - | - | - | |
| 9 | * | - | - | - | |
| 10 | * | - | - | - | |
| 11 | * | - | - | - | |
| 12 | * | - | - | - | |
| 13 | * | - | - | - | |
| 14 | * | - | - | - | |
| 15 | * | - | - | - | |
| 16 | * | - | - | - |
tracepath -6
1?: [LOCALHOST] 0.013ms pmtu 1500
1: _gateway 0.660ms
1: _gateway 0.662ms
2: 2001:7f8:1e::4 12.543ms
3: 2001:7f8:30:0:2:1:0:8218 11.642ms
4: ??? 13.028ms
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
Too many hops: pmtu 1500
Resume: pmtu 1500 From DE host (Berlin) openRFC 4890 ✓
filter likely at: (none) · min PMTU on path: 1500
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 | zayoeurope.bcix.de 2001:7f8:19:1::201a:1 | 10.3ms | 0% | - | NA |
| 4 | 2001:1b48:2:2::6:2 | 23.5ms | 0% | AS8218 | NEO-ASN - Zayo Infrastructure France SA, FR |
| 5 | 2001:1b48:2:107::4:2 | 18.2ms | 0% | AS8218 | NEO-ASN - Zayo Infrastructure France SA, FR |
| 6 | * | - | 0% | - | |
| 7 | * | - | - | - | |
| 8 | * | - | - | - | |
| 9 | * | - | - | - | |
| 10 | * | - | - | - | |
| 11 | * | - | - | - | |
| 12 | * | - | - | - | |
| 13 | * | - | - | - | |
| 14 | * | - | - | - | |
| 15 | * | - | - | - | |
| 16 | * | - | - | - |
tracepath -6
1?: [LOCALHOST] 0.023ms pmtu 1500
1: xe-0-0-13-178.gw01.ber01.as59645.net 0.660ms
1: xe-0-0-13-178.gw01.ber01.as59645.net 0.450ms
2: ae0-2453.cr10.ber01.lwlcom.net 0.853ms
3: zayoeurope.bcix.de 11.833ms asymm 8
4: 2001:1b48:2:2::6:2 18.477ms asymm 5
5: 2001:1b48:2:107::4:2 18.219ms asymm 6
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
Too many hops: pmtu 1500
Resume: pmtu 1500 From DE host (Düsseldorf) openRFC 4890 ✓
filter likely at: (none) · min PMTU on path: 1500
Path (traceroute + mtr + PTR)
| # | IP / PTR | RTT | mtr loss | AS | AS holder |
|---|---|---|---|---|---|
| 1 | * | - | 0%* | - | |
| 2 | eth1-0-12-h5594.edge5-dus1.bb.wiit.network 2001:4ba0:92f4:3::1 | 5.7ms | 0% | AS24961 | MYLOC-AS - WIIT AG, DE |
| 3 | * | - | - | - | |
| 4 | lag11.core3-dus1.bb.wiit.network 2001:4ba0:ffe9:115::3 | 0.2ms | 0% | AS24961 | MYLOC-AS - WIIT AG, DE |
| 5 | lag8.core1-dus-ix.bb.wiit.network 2001:4ba0:ffe9:8::2 | 0.4ms | 0% | AS24961 | MYLOC-AS - WIIT AG, DE |
| 6 | decix.tcr1.itx5.fra.as8218.eu 2001:7f8::201a:0:2 | 13.3ms | 0% | - | NA |
| 7 | 2001:1b48:2:3::36:2 | 8.3ms | 0% | AS8218 | NEO-ASN - Zayo Infrastructure France SA, FR |
| 8 | 2001:1b48:2:2::e:2 | 10.6ms | 0% | AS8218 | NEO-ASN - Zayo Infrastructure France SA, FR |
| 9 | 2001:1b48:2:2::6:2 | 23.9ms | 0% | AS8218 | NEO-ASN - Zayo Infrastructure France SA, FR |
| 10 | 2001:1b48:2:107::4:2 | 24.0ms | - | AS8218 | NEO-ASN - Zayo Infrastructure France SA, FR |
| 11 | * | - | - | - | |
| 12 | * | - | - | - | |
| 13 | * | - | - | - | |
| 14 | * | - | - | - | |
| 15 | * | - | - | - | |
| 16 | * | - | - | - |
tracepath -6
1?: [LOCALHOST] 0.021ms pmtu 1500
1: xe-0-0-12-142.gw01.dus01.as59645.net 0.404ms
1: xe-0-0-12-142.gw01.dus01.as59645.net 0.189ms
2: eth1-0-12-h5594.edge5-dus1.bb.wiit.network 8.103ms
3: no reply
4: lag30.core3-dus1.bb.wiit.network 0.405ms
5: lag2.core1-dus-ix.bb.wiit.network 0.438ms
6: decix.tcr1.itx5.fra.as8218.eu 10.907ms asymm 7
7: 2001:1b48:2:3::36:2 8.468ms
8: 2001:1b48:2:2::e:2 11.025ms asymm 5
9: 2001:1b48:2:2::6:2 24.117ms asymm 6
10: no reply
11: no reply
12: no reply
13: no reply
14: no reply
15: no reply
16: 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
Path (traceroute + mtr + PTR)
| # | IP / PTR | RTT | mtr loss | AS | AS holder |
|---|---|---|---|---|---|
| 1 | 2a00:8642:42::2 | 0.0ms | 0% | AS203993 | GNA-DC1-AS - S.J.M. Steffann, NL |
| 2 | * | - | - | - | |
| 3 | * | - | 90% | - | |
| 4 | ams-ix.r06.nikh.ams.nl.nextlayer.net 2001:7f8:1::a500:1764:1 | 23.9ms | 0% | - | NA |
| 5 | ip6-ae1-0-r31.inx.vie.nextlayer.net 2a01:190:1764:800a::1 | 24.8ms | 0% | AS1764 | NEXTLAYER-AS - Next Layer Telekommunikationsdienstleistungs- und Beratungs GmbH, AT |
| 6 | * | - | - | - | |
| 7 | * | - | 0% | - | |
| 8 | * | - | - | - | |
| 9 | * | - | - | - | |
| 10 | * | - | - | - | |
| 11 | * | - | - | - | |
| 12 | * | - | - | - | |
| 13 | * | - | - | - | |
| 14 | * | - | - | - | |
| 15 | * | - | - | - | |
| 16 | * | - | - | - |
Rate-limited ICMPv6: hop 3 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.031ms pmtu 1500
1: 2a00:8642:42::2 2.243ms
1: 2a00:8642:42::2 1.568ms
2: gw.friends.steffann.nl 3.041ms
3: no reply
4: ams-ix.r06.nikh.ams.nl.nextlayer.net 22.163ms asymm 8
5: ip6-ae2-0-r31.inx.vie.nextlayer.net 21.313ms asymm 11
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
Too many hops: pmtu 1500
Resume: pmtu 1500 From ITA host (Karsolink) openRFC 4890 ✓
filter likely at: (none) · min PMTU on path: 1500
Path (traceroute + mtr + PTR)
| # | IP / PTR | RTT | mtr loss | AS | AS holder |
|---|---|---|---|---|---|
| 1 | * | - | - | - | |
| 2 | * | - | - | - | |
| 3 | * | - | - | - | |
| 4 | zayoeurope-AS8218.mix-it.net 2001:7f8:b:100:1d1:a5d0:8218:208 | 22.0ms | 0% | - | NA |
| 5 | 2001:1b48:2:c::1:1 | 8.8ms | 0% | AS8218 | NEO-ASN - Zayo Infrastructure France SA, FR |
| 6 | 2001:1b48:2:2::9:1 | 21.1ms | 0% | AS8218 | NEO-ASN - Zayo Infrastructure France SA, FR |
| 7 | 2001:1b48:2:107::19:2 | 19.7ms | 0% | AS8218 | NEO-ASN - Zayo Infrastructure France SA, FR |
| 8 | * | - | 0% | - | |
| 9 | * | - | - | - | |
| 10 | * | - | - | - | |
| 11 | * | - | - | - | |
| 12 | * | - | - | - | |
| 13 | * | - | - | - | |
| 14 | * | - | - | - | |
| 15 | * | - | - | - | |
| 16 | * | - | - | - |
tracepath -6
1?: [LOCALHOST] 0.010ms pmtu 1500
1: karsolink-01.net.karsolink.com 0.585ms
2: 2a12:d8c0:109f:121::a1 0.602ms
3: 2a12:d8c0:101f:103::1 8.644ms
4: zayoeurope-AS8218.mix-it.net 9.039ms
5: 2001:1b48:2:c::1:1 9.047ms
6: 2001:1b48:2:2::9:1 19.844ms
7: 2001:1b48:2:107::19:2 20.081ms
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
Too many hops: pmtu 1500
Resume: pmtu 1500 From SLO host (6connect) openRFC 4890 ✓
filter likely at: (none) · min PMTU on path: 1500
Path (traceroute + mtr + PTR)
| # | IP / PTR | RTT | mtr loss | AS | AS holder |
|---|---|---|---|---|---|
| 1 | fw1-lju.6connect.com 2607:fae0:a000::2 | 0.4ms | 0%* | AS8038 | 6CONNECT - 6connect, Inc., US |
| 2 | * | - | - | - | |
| 3 | * | - | 60% | - | |
| 4 | 2a00:ee0:1:15::2 | 1.0ms | 0% | AS5603 | SIOL-NET - Telekom Slovenije, d.d., SI |
| 5 | decix.tcr1.itx5.fra.as8218.eu 2001:7f8::201a:0:2 | 15.3ms | 0% | - | NA |
| 6 | 2001:1b48:2:2::6:2 | 15.2ms | 0% | AS8218 | NEO-ASN - Zayo Infrastructure France SA, FR |
| 7 | 2001:1b48:2:107::4:2 | 16.2ms | 0% | AS8218 | NEO-ASN - Zayo Infrastructure France SA, FR |
| 8 | * | - | 0% | - | |
| 9 | * | - | - | - | |
| 10 | * | - | - | - | |
| 11 | * | - | - | - | |
| 12 | * | - | - | - | |
| 13 | * | - | - | - | |
| 14 | * | - | - | - | |
| 15 | * | - | - | - | |
| 16 | * | - | - | - |
Rate-limited ICMPv6: hop 3 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.022ms pmtu 9000
1: fw1-lju.6connect.com 0.597ms
1: fw1-lju.6connect.com 0.747ms
2: no reply
3: no reply
4: 2a00:ee0:1:10::2 1.325ms asymm 3
5: 2a00:ee0:1:15::2 1.562ms pmtu 1500
5: decix.tcr1.itx5.fra.as8218.eu 16.509ms
6: 2001:1b48:2:2::6:2 15.529ms asymm 4
7: 2001:1b48:2:107::4:2 15.683ms asymm 6
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
Too many hops: pmtu 1500From SLO host (T-2) openRFC 4890 ✓
filter likely at: (none) · min PMTU on path: 1500
Path (traceroute + mtr + PTR)
| # | IP / PTR | RTT | mtr loss | AS | AS holder |
|---|---|---|---|---|---|
| 1 | * | - | 0%* | - | |
| 2 | 2a01:260:1::225 | 4.4ms | 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 | 2.5ms | 0%* | AS34779 | T-2-AS - T-2, d.o.o., SI |
| 4 | 2a01-260-1-1--38.core6.t-2.net 2a01:260:1:1::38 | 2.1ms | 0%* | AS34779 | T-2-AS - T-2, d.o.o., SI |
| 5 | 2001:7f8:30:0:2:1:0:8218 @VIX / AAIX / SAIX / TIROL-IX / ERA-IX | 7.8ms | 0% | - | NA |
| 6 | 2001:1b48:2:107::4:2 | 8.1ms | 0% | AS8218 | NEO-ASN - Zayo Infrastructure France SA, FR |
| 7 | 2001:1b48:2:107::4:2 | 8.3ms | 0% | AS8218 | NEO-ASN - Zayo Infrastructure France SA, FR |
| 8 | * | - | - | - | |
| 9 | * | - | - | - | |
| 10 | * | - | - | - | |
| 11 | * | - | - | - | |
| 12 | * | - | - | - | |
| 13 | * | - | - | - | |
| 14 | * | - | - | - | |
| 15 | * | - | - | - | |
| 16 | * | - | - | - |
tracepath -6
1?: [LOCALHOST] 0.016ms pmtu 1500
1: 2a01:261:313:b814::1 0.787ms
2: 2a01:260:1::225 2.026ms
3: 2a01-260-1-1--9c.core6.t-2.net 2.436ms
4: 2a01-260-1-1--c.core6.t-2.net 5.311ms
5: 2a01-260-1-1--c.core6.t-2.net 4.326ms asymm 4
6: 2001:7f8:30:0:2:1:0:8218 11.609ms asymm 5
7: 2001:1b48:2:107::4:2 9.040ms asymm 6
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
Too many hops: pmtu 1500
Resume: pmtu 1500