AS overview
Test target: 2a0c:6300::1 · static prefix probe · address space: unknown · prefixes announced: 5
prefix(es): 2a00:ad03::/32, 2a0c:6300::/30, 2a00:ad07:3000::/36, 2a00:ad00::/29, 2a00:ad00:2010::/44
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) | ||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | ||
2a0c:6300::1 | prb | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | ? | ? | ✓ | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | ✓ |
SOX peering
Not an SOX member, but our traceroute path crosses the SOX LAN from SRB host (SOX, Belgrade), DE host (Berlin), NL host (go6lab) - reached via an SOX-resident transit operator.
RPKI & ASPA
5 of 5 prefix(es) covered by a valid ROA.
| Prefix | RPKI state | Reason | Covering VRP(s) |
|---|---|---|---|
2a00:ad07:3000::/36 | ✓ valid | matched VRP (correct origin, length within maxLength) | AS41897 /36 maxLen 36 (ripe); AS41897 /29 maxLen 29 (ripe) |
2a00:ad00::/29 | ✓ valid | matched VRP (correct origin, length within maxLength) | AS41897 /29 maxLen 29 (ripe) |
2a00:ad03::/32 | ✓ valid | matched VRP (correct origin, length within maxLength) | AS41897 /32 maxLen 32 (ripe); AS41897 /29 maxLen 29 (ripe) |
2a0c:6300::/30 | ✓ valid | matched VRP (correct origin, length within maxLength) | AS41897 /30 maxLen 30 (ripe) |
2a00:ad00:2010::/44 | ✓ valid | matched VRP (correct origin, length within maxLength) | AS41897 /44 maxLen 44 (ripe); AS41897 /29 maxLen 29 (ripe) |
Random-IP probe (yarrp) into the AS' prefixes
At least one router inside AS41897's announced prefix replied during the random-target probe. Hop(s): 2a00:ad00:1000:10::2, 2a00:ad00:1000:11::2, 2a00:ad00:1000:12::1, 2a00:ad00:1000:13::1, 2a00:ad00:1000:14::1. 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 2026-09-23T11:09:06Z
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 | 0.3ms | 0%* | AS60733 | PERKE-NET - ZORAN PEROVIC trading as Agencija Perke.NET, RS |
| 2 | sat-trakt.sox.rs @SOX 2001:7f8:1e::33 | 10.8ms | 0% | AS13004 | Serbian Open eXchange |
| 3 | 2a0c:6300::1 | 12.3ms | 0% | AS41897 | SAT-TRAKT-AS - Sat-Trakt D.O.O., RS |
tracepath -6
1?: [LOCALHOST] 0.015ms pmtu 1500
1: _gateway 0.351ms
1: _gateway 1.105ms
2: sat-trakt.sox.rs 11.144ms asymm 5
3: 2a0c:6300::1 12.445ms reached
Resume: pmtu 1500 hops 3 back 6 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 | ae0-150.cr10.fra01.lwlcom.net 2a00:c380:b200:230::174 | 10.1ms | 0% | AS50629 | LWLCOM - LWLcom GmbH, DE |
| 4 | ae0-100.cr10.fra02.lwlcom.net 2a00:c380:b200:230::215 | 10.6ms | 0% | AS50629 | LWLCOM - LWLcom GmbH, DE |
| 5 | ae0-10.cr10.fra06.lwlcom.net 2a00:c380:b200:230::236 | 9.9ms | 0% | AS50629 | LWLCOM - LWLcom GmbH, DE |
| 6 | * | - | - | - | |
| 7 | sat-trakt.sox.rs @SOX 2001:7f8:1e::33 | 33.4ms | 0% | AS13004 | Serbian Open eXchange |
| 8 | 2a0c:6300::1 | 37.6ms | 0% | AS41897 | SAT-TRAKT-AS - Sat-Trakt D.O.O., RS |
tracepath -6
1?: [LOCALHOST] 0.027ms pmtu 1500
1: xe-0-0-13-178.gw01.ber01.as59645.net 0.415ms
1: xe-0-0-13-178.gw01.ber01.as59645.net 0.393ms
2: ae0-2453.cr10.ber01.lwlcom.net 0.889ms
3: ae0-150.cr10.fra01.lwlcom.net 10.435ms asymm 7
4: ae0-100.cr10.fra02.lwlcom.net 10.353ms asymm 8
5: ae0-10.cr10.fra06.lwlcom.net 10.098ms asymm 7
6: no reply
7: sat-trakt.sox.rs 33.841ms
8: 2a0c:6300::1 38.024ms reached
Resume: pmtu 1500 hops 8 back 9 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 | xe-0-0-12-142.gw01.dus01.as59645.net 2a06:d1c1:100:d::1 | 0.3ms | 0%* | AS59645 | WYBT-NET - Tobias Fiebig, DE |
| 2 | eth1-0-12-h5594.edge5-dus1.bb.wiit.network 2001:4ba0:92f4:3::1 | 1.2ms | 0% | AS24961 | MYLOC-AS - WIIT AG, DE |
| 3 | lag13.agr3-dus3.bb.wiit.network 2001:4ba0:ffe9:7d::1 | 2.3ms | 0% | AS24961 | MYLOC-AS - WIIT AG, DE |
| 4 | lag11.core3-dus1.bb.wiit.network 2001:4ba0:ffe9:115::3 | 0.3ms | 0% | AS24961 | MYLOC-AS - WIIT AG, DE |
| 5 | ddf-b4-link.ip.twelve99.net 2001:2035:0:9fb::1 | 0.7ms | 0% | AS1299 | TWELVE99 - Arelion Sweden AB, SE |
| 6 | ddf-b5-link.ip.twelve99.net 2001:2034:a:336::1 | 2.2ms | 0% | AS1299 | TWELVE99 - Arelion Sweden AB, SE |
| 7 | 2001:2034:a:15a | 21.8ms | 0% | - | |
| 8 | * | - | - | - | |
| 9 | bpt-b6-link.ip.twelve99.net 2001:2034:a:22b::1 | 20.2ms | 0% | AS1299 | TWELVE99 - Arelion Sweden AB, SE |
| 10 | 2a0c:6300::1 | 24.0ms | 0% | AS41897 | SAT-TRAKT-AS - Sat-Trakt D.O.O., RS |
tracepath -6
1?: [LOCALHOST] 0.040ms pmtu 1500
1: xe-0-0-12-142.gw01.dus01.as59645.net 0.369ms
1: xe-0-0-12-142.gw01.dus01.as59645.net 0.220ms
2: eth1-0-12-h5594.edge5-dus1.bb.wiit.network 1.552ms
3: no reply
4: lag30.core3-dus1.bb.wiit.network 0.504ms
5: ddf-b4-link.ip.twelve99.net 0.862ms
6: ddf-b5-link.ip.twelve99.net 2.782ms
7: ffm-bb1-link.ip.twelve99.net 21.665ms asymm 6
8: no reply
9: bpt-b6-link.ip.twelve99.net 20.699ms asymm 6
10: 2a0c:6300::1 24.304ms reached
Resume: pmtu 1500 hops 10 back 7 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 | 3.3ms | 0% | AS203993 | GNA-DC1-AS - S.J.M. Steffann, NL |
| 2 | * | - | 0%* | - | |
| 3 | 2a00:1ca8:1::194 | 3.9ms | 0% | AS50673 | Serverius-as - Serverius Holding B.V., NL |
| 4 | 2a03:3f40::10:41 | 3.7ms | 0% | AS50673 | Serverius-as - Serverius Holding B.V., NL |
| 5 | 2001:b28:3ff::32cb:0:1 | 52.3ms | 0% | AS31500 | GNM-AS - Global Network Management Inc, AG |
| 6 | sat-trakt.sox.rs @SOX 2001:7f8:1e::33 | 42.3ms | 0% | AS13004 | Serbian Open eXchange |
| 7 | 2a0c:6300::1 | 42.1ms | 0% | AS41897 | SAT-TRAKT-AS - Sat-Trakt D.O.O., RS |
tracepath -6
1?: [LOCALHOST] 0.036ms pmtu 1500
1: 2a00:8642:42::2 2.940ms
1: 2a00:8642:42::2 2.402ms
2: gw.friends.steffann.nl 10.434ms
3: 2a00:1ca8:1::194 5.937ms
4: 2a03:3f40::10:41 5.656ms
5: 2001:b28:3ff::32cb:0:1 49.861ms
6: sat-trakt.sox.rs 43.809ms asymm 7
7: 2a0c:6300::1 36.697ms reached
Resume: pmtu 1500 hops 7 back 8 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 | * | - | 0%* | - | |
| 2 | * | - | 0%* | - | |
| 3 | * | - | 0% | - | |
| 4 | 2a02:2d8:4:1815:232a | 7.2ms | 0% | - | |
| 5 | RT.DPX.BUD.HU.retn.net 2a02:2d8::57f5:e0ad | 20.2ms | 10% | AS9002 | RETN-AS - RETN Limited, GB |
| 6 | 2001:7f8:35::4:1897:1 | 27.4ms | 0% | - | NA |
| 7 | 2a00:ad00:1000:10::2 | 21.1ms | 0% | AS41897 | SAT-TRAKT-AS - Sat-Trakt D.O.O., RS |
| 8 | 2a0c:6300::1 | 20.0ms | 0% | AS41897 | SAT-TRAKT-AS - Sat-Trakt D.O.O., RS |
Rate-limited ICMPv6: hop 5 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.029ms pmtu 1500
1: karsolink-01.net.karsolink.com 1.038ms
1: karsolink-01.net.karsolink.com 1.149ms
2: 2a12:d8c0:109f:121::a1 1.014ms
3: 2a12:d8c0:101f:103::1 9.099ms
4: ae8-202.rt.clr.mil.it.retn.net 8.243ms asymm 5
5: rt.dpx.bud.hu.retn.net 21.185ms asymm 6
6: 2001:7f8:35::4:1897:1 33.666ms asymm 9
7: 2a00:ad00:1000:17::2 22.261ms asymm 8
8: 2a0c:6300::1 22.047ms reached
Resume: pmtu 1500 hops 8 back 7 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 | 0.2ms | 0%* | AS8038 | 6CONNECT - 6connect, Inc., US |
| 2 | ccr-to-fw-ccr1-gw-lju.6connect.com 2607:fae0:a000:2::2 | 0.6ms | - | AS8038 | 6CONNECT - 6connect, Inc., US |
| 3 | 2a03:a100:0:201:1::1 | 0.5ms | 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 | 1.6ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 5 | 100ge0-0-0-5.core1.vie1.he.net 2001:470:0:578::1 | 8.4ms | 20% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 6 | e0-35.core2.bts1.he.net 2001:470:0:412::2 | 7.6ms | - | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 7 | * | - | 0% | - | |
| 8 | 2001:7f8:35::4:1897:1 | 20.0ms | 0% | - | NA |
| 9 | 2a0c:6300::1 | 16.5ms | 0% | AS41897 | SAT-TRAKT-AS - Sat-Trakt D.O.O., RS |
Rate-limited ICMPv6: hop 5 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.015ms pmtu 9000
1: fw1-lju.6connect.com 0.620ms
1: fw1-lju.6connect.com 0.530ms
2: no reply
3: 2a03:a100:0:201:1::1 0.779ms
4: 2a03:a100:0:201:1::1 1.000ms pmtu 1500
4: e0-1.core1.lju1.he.net 2.312ms
5: 100ge0-0-0-5.core1.vie1.he.net 8.609ms
6: no reply
7: no reply
8: 2001:7f8:35::4:1897:1 15.758ms asymm 11
9: 2a0c:6300::1 15.615ms reached
Resume: pmtu 1500 hops 9 back 9 From 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 | * | - | - | - | |
| 2 | 2a01:260:1::225 | 2.8ms | 0%* | AS34779 | T-2-AS - T-2, d.o.o., SI |
| 3 | 2a01-260-1-1--9c.core6.t-2.net 2a01:260:1:1::9c | 2.4ms | 0%* | AS34779 | T-2-AS - T-2, d.o.o., SI |
| 4 | hurricane-electric.nikhef.nlsix.net 2001:7f8:13::a500:6939:1 | 39.5ms | 0%* | - | NA |
| 5 | hurricane-electric.nikhef.nlsix.net 2001:7f8:13::a500:6939:1 | 35.4ms | 0% | - | NA |
| 6 | be4.core1.vie1.he.net 2001:470:e:149::2 | 29.9ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 7 | be4.core1.vie1.he.net 2001:470:e:149::2 | 29.9ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 8 | * | - | - | - | |
| 9 | 2a00:ad00:1000:11::2 | 43.2ms | 0% | AS41897 | SAT-TRAKT-AS - Sat-Trakt D.O.O., RS |
| 10 | 2a0c:6300::1 | 37.6ms | 0% | AS41897 | SAT-TRAKT-AS - Sat-Trakt D.O.O., RS |
tracepath -6
1?: [LOCALHOST] 0.029ms pmtu 1500
1: 2a01:261:313:b814::1 1.705ms
1: no reply
2: 2a01:260:1::225 2.719ms
3: 2a01-260-1-1--9a.core6.t-2.net 2.570ms
4: hurricane-electric.nikhef.nlsix.net 36.586ms
5: be7.core2.fra2.he.net 42.632ms
6: be4.core1.vie1.he.net 30.888ms asymm 5
7: e0-35.core2.bts1.he.net 34.845ms asymm 6
8: 2001:7f8:35::4:1897:1 40.358ms
9: 2001:7f8:35::4:1897:1 35.937ms asymm 8
10: 2a00:ad00:1000:10::2 40.847ms asymm 7
11: 2a00:ad00:1000:11::2 37.983ms asymm 7
12: 2a0c:6300::1 38.285ms reached
Resume: pmtu 1500 hops 12 back 6