AS overview
Test target: 2a02:840:101:126::2:1 · via IPv6 Hitlist (responsive) · address space: mixed · prefixes announced: 2
prefix(es): 2a02:840::/32, 2a01:b4a0:1000::/48
Targets & per-vantage-point probe results (9 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 | ||
2a02:840:101:126::2:1 | hit | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | ? | ? | ✓ | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | ✓ |
2a02:840:101:126::2:2 | hit | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | ? | ? | ✓ | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | ✓ |
2a02:840:1:1000::162 | hit | ✓ | ✓ | open | open | ✓ | ✓ | ✓ | open | open | ✓ | ✓ | ✓ | open | open | ✓ | ✓ | ✓ | open | open | ✓ | ✓ | ✓ | open | open | ✓ | ✓ | ✓ | open | open | ✓ | ✓ | ✓ | open | open | ✓ |
2a02:840:1:1000::165 | hit | ✓ | ✓ | open | open | ✓ | ✓ | ✓ | open | open | ✓ | ✓ | ✓ | open | open | ✓ | ✓ | ✓ | open | open | ✓ | ✓ | ✓ | open | open | ✓ | ✓ | ✓ | open | open | ✓ | ✓ | ✓ | open | open | ✓ |
2a02:840:1:1000::170 | hit | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | ? | ? | ✓ | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | - |
2a02:840:1:1000::2 | hit | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | ? | ? | ✓ | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | - |
2a02:840:1:1000::203 | hit | ✓ | ✓ | open | refused | ✓ | ✓ | ✓ | open | refused | ✓ | ✓ | ✓ | open | refused | ✓ | ✓ | ✓ | open | ? | ✓ | ✓ | ✓ | open | refused | ✓ | ✓ | ✓ | open | refused | ✓ | ✓ | ✓ | open | refused | - |
2a02:840:1:1000::205 | hit | ✓ | ✓ | open | open | ✓ | ✓ | ✓ | open | open | ✓ | ✓ | ✓ | open | open | ✓ | ✓ | ✓ | open | open | ✓ | ✓ | ✓ | open | open | ✓ | ✓ | ✓ | open | open | ✓ | ✓ | ✓ | open | open | ✓ |
2a02:840::1 | prb | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | ? | ? | ✓ | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | - |
SIX peering
Not an SIX member, but our traceroute path crosses the SIX LAN from SLO host (6connect), SLO host (T-2) - reached via an SIX-resident transit operator.
RPKI & ASPA
1 of 2 prefix(es) covered by a valid ROA, 1 not-found.
| Prefix | RPKI state | Reason | Covering VRP(s) |
|---|---|---|---|
2a02:840::/32 | ✓ valid | matched VRP (correct origin, length within maxLength) | AS3212 /32 maxLen 32 (ripe); AS41828 /32 maxLen 32 (ripe) |
2a01:b4a0:1000::/48 | - not-found | no covering VRP |
ASPA: this AS has published an ASPA record listing 1 upstream provider(s) that are authorized to propagate routes from it: AS3212. 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 AS41828's announced prefix(es). No router inside the prefix responded. The deepest visible hop was 2a00:fc0:10:301::2 at hop 20 - that router answers ICMPv6 Echo. This is not in AS41828's announced prefix; operationally it's the AS-edge / peering interface (often on a SIX 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 2026-09-23T10:35:10Z
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 | 0.2ms | 0%* | AS60733 | PERKE-NET - ZORAN PEROVIC trading as Agencija Perke.NET, RS |
| 2 | 2001:7f8:1e::121 | 2.1ms | 80% | AS13004 | SOX - Serbian Open Exchange DOO, RS |
| 3 | 2a03:dd80:1:1::1 | 1.6ms | - | AS21215 | UGNI - UNITED GROUP NETWORK INFRASTRUCTURE d.o.o. Beograd, RS |
| 4 | * | - | 90% | - | |
| 5 | 2a00:fc0:3212:3::a | 15.5ms | 0% | AS3212 | TELEMACH - Telemach Slovenija d.o.o., SI |
| 6 | 2a02:840:101:126::2:1 | 20.4ms | 0% | AS41828 | TELEMACH-HOSTING - Telemach Slovenija d.o.o., SI |
Rate-limited ICMPv6: hop 2, hop 4 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.015ms pmtu 1500
1: _gateway 0.513ms
1: _gateway 0.484ms
2: 2001:7f8:1e::121 1.436ms
3: 2a03:dd80:1:1::1 1.422ms asymm 2
4: 2a03:dd80:2:e::1 14.331ms
5: 2a00:fc0:3212:3::a 14.859ms asymm 6
6: 2a02:840:101:126::2:1 18.623ms reached
Resume: pmtu 1500 hops 6 back 5 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 | ae0-40.cr10.muc02.lwlcom.net 2a00:c380:b200:230::178 | 11.5ms | 0% | AS50629 | LWLCOM - LWLcom GmbH, DE |
| 4 | ae0-10.cr10.muc01.lwlcom.net 2a00:c380:b200:230::177 | 11.6ms | 0% | AS50629 | LWLCOM - LWLcom GmbH, DE |
| 5 | * | - | 10% | - | |
| 6 | 2a02:840:101:126::2:1 | 36.9ms | 0% | AS41828 | TELEMACH-HOSTING - Telemach Slovenija d.o.o., SI |
Rate-limited ICMPv6: hop 5 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.018ms pmtu 1500
1: xe-0-0-13-178.gw01.ber01.as59645.net 0.833ms
1: xe-0-0-13-178.gw01.ber01.as59645.net 0.817ms
2: ae0-2453.cr10.ber01.lwlcom.net 1.298ms
3: ae0-40.cr10.muc02.lwlcom.net 11.806ms
4: ae0-10.cr10.muc01.lwlcom.net 11.835ms
5: 2001:7f8:30:0:2:1:0:3212 21.826ms asymm 7
6: 2a02:840:101:126::2:1 30.790ms reached
Resume: pmtu 1500 hops 6 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 | 0.2ms | 0%* | AS59645 | WYBT-NET - Tobias Fiebig, DE |
| 2 | ae0-101.cr10.dus02.lwlcom.net 2a06:d1c0::dead:beef:1301 | 0.2ms | 0%* | AS59645 | WYBT-NET - Tobias Fiebig, DE |
| 3 | ae0-40.cr10.dus05.lwlcom.net 2a00:c380:b200:230::199 | 0.3ms | 0% | AS50629 | LWLCOM - LWLcom GmbH, DE |
| 4 | ae0-10.cr10.ams02.lwlcom.net 2a00:c380:b200:230::101 | 3.4ms | 0% | AS50629 | LWLCOM - LWLcom GmbH, DE |
| 5 | 2001:7f8:13::a500:3212:1 | 23.2ms | 0% | - | NA |
| 6 | 2a02:840:101:126::2:1 | 57.0ms | 0% | AS41828 | TELEMACH-HOSTING - Telemach Slovenija d.o.o., SI |
tracepath -6
1?: [LOCALHOST] 0.012ms pmtu 1500
1: xe-0-0-12-142.gw01.dus01.as59645.net 0.428ms
1: xe-0-0-12-142.gw01.dus01.as59645.net 0.826ms
2: ae0-101.cr10.dus02.lwlcom.net 0.565ms
3: ae0-40.cr10.dus05.lwlcom.net 0.685ms
4: ae0-10.cr10.ams02.lwlcom.net 3.497ms
5: 2001:7f8:13::a500:3212:1 22.920ms asymm 7
6: 2a02:840:101:126::2:1 28.719ms reached
Resume: pmtu 1500 hops 6 back 8 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 | 2.5ms | 0% | AS203993 | GNA-DC1-AS - S.J.M. Steffann, NL |
| 2 | * | - | 0%* | - | |
| 3 | 2a00:1ca8:1::194 | 3.6ms | 0% | AS50673 | Serverius-as - Serverius Holding B.V., NL |
| 4 | 2a03:3f40::10:33 | 5.4ms | 0% | AS50673 | Serverius-as - Serverius Holding B.V., NL |
| 5 | 2001:7f8:13::a500:3212:1 | 23.7ms | 0% | - | NA |
| 6 | 2a02:840:101:126::2:1 | 28.7ms | 0% | AS41828 | TELEMACH-HOSTING - Telemach Slovenija d.o.o., SI |
tracepath -6
1?: [LOCALHOST] 0.047ms pmtu 1500
1: ??? 6.300ms
1: ??? 3.372ms
2: gw.friends.steffann.nl 9.146ms
3: 2a00:1ca8:1::194 305.254ms
4: 2a03:3f40::10:33 6.431ms
5: 2001:7f8:13::a500:3212:1 25.626ms asymm 8
6: 2a02:840:101:126::2:1 30.257ms reached
Resume: pmtu 1500 hops 6 back 9 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 | * | - | 0%* | - | |
| 3 | * | - | 90% | - | |
| 4 | * | - | - | - | |
| 5 | 100ge0-0-0-20.core1.vie1.he.net 2001:470:0:414::1 | 21.8ms | 20% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 6 | telemach-d-o-o.e0-77.core2.vie1.he.net 2001:470:1:bcc::2 | 21.1ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 7 | 2a02:840:101:126::2:1 | 29.5ms | 0% | AS41828 | TELEMACH-HOSTING - Telemach Slovenija d.o.o., SI |
Rate-limited ICMPv6: hop 3, 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: no reply
2: 2a12:d8c0:109f:121::a1 0.841ms
3: 2a12:d8c0:101f:6::1 10.173ms
4: no reply
5: 100ge0-0-0-20.core1.vie1.he.net 21.934ms
6: telemach-d-o-o.e0-66.core2.vie1.he.net 22.755ms asymm 7
7: 2a02:840:101:126::2:1 122.681ms reached
Resume: pmtu 1500 hops 7 back 8 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 | 0.3ms | 0%* | AS8038 | 6CONNECT - 6connect, Inc., US |
| 2 | * | - | - | - | |
| 3 | * | - | 40% | - | |
| 4 | 2001:7f8:46::2:1215 @SIX | 9.5ms | 0% | AS51988 | ARNES-SIX - ARNES, SI |
| 5 | 2a03:dd80:1:1::1 | 10.7ms | 10% | AS21215 | UGNI - UNITED GROUP NETWORK INFRASTRUCTURE d.o.o. Beograd, RS |
| 6 | 2a03:dd80:2:e::1 | 9.7ms | 40% | AS21215 | UGNI - UNITED GROUP NETWORK INFRASTRUCTURE d.o.o. Beograd, RS |
| 7 | 2a00:fc0:3212:1::a | 9.7ms | 0% | AS3212 | TELEMACH - Telemach Slovenija d.o.o., SI |
| 8 | 2a00:fc0:3212:200::a | 9.9ms | 0% | AS3212 | TELEMACH - Telemach Slovenija d.o.o., SI |
| 9 | 2a02:840:101:126::2:1 | 19.6ms | 0% | AS41828 | TELEMACH-HOSTING - Telemach Slovenija d.o.o., SI |
Rate-limited ICMPv6: hop 3, hop 5, hop 6 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.021ms pmtu 9000
1: fw1-lju.6connect.com 0.471ms
1: fw1-lju.6connect.com 0.429ms
2: no reply
3: 2a03:a100:0:201:1::1 1.058ms
4: 2a03:a100:0:201:1::1 0.902ms pmtu 1500
4: e0-1.core1.lju1.he.net 2.491ms
5: no reply
6: telemach-d-o-o.e0-77.core2.vie1.he.net 8.341ms asymm 5
7: 2a02:840:101:126::2:1 23.269ms reached
Resume: pmtu 1500 hops 7 back 6 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 | 12.4ms | 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 | 11.1ms | 0%* | AS34779 | T-2-AS - T-2, d.o.o., SI |
| 4 | 2001:7f8:46::2:1215 @SIX | 20.4ms | 70% | AS51988 | ARNES-SIX - ARNES, SI |
| 5 | * | - | 70% | - | |
| 6 | * | - | 70% | - | |
| 7 | 2a00:fc0:3212:1::a | 20.3ms | 0% | AS3212 | TELEMACH - Telemach Slovenija d.o.o., SI |
| 8 | * | - | 0% | - | |
| 9 | 2a02:840:101:126::2:1 | 15.5ms | - | AS41828 | TELEMACH-HOSTING - Telemach Slovenija d.o.o., SI |
Rate-limited ICMPv6: hop 4, hop 5, hop 6 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.026ms pmtu 1500
1: 2a01:261:313:b814::1 1.031ms
2: 2a01:260:1::225 3.239ms
3: 2a01-260-1-1--9a.core6.t-2.net 2.567ms
4: 2001:7f8:46::2:1215 12.462ms
5: 2a03:dd80:1:1::1 12.970ms asymm 4
6: no reply
7: 2a00:fc0:3212:3::a 11.178ms
8: 2a00:fc0:3212:200::a 12.174ms asymm 7
9: 2a02:840:101:126::2:1 38.237ms reached
Resume: pmtu 1500 hops 9 back 6