AS overview
Test target: 2a01:80a0:1::1 · static prefix probe · address space: mixed · prefixes announced: 3
prefix(es): 2a01:80a0:1::/48, 2a01:80a0:1000::/36, 2a01:80a0: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) | ||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | ||
2a01:80a0:1::1 | prb | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | ? | ? | ✓ | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | ✓ |
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), DE host (Düsseldorf), ITA host (Karsolink), SLO host (6connect) - reached via an VIX / AAIX / SAIX / TIROL-IX / ERA-IX-resident transit operator.
RPKI & ASPA
0 of 3 prefix(es) covered by a valid ROA, 3 not-found.
| Prefix | RPKI state | Reason | Covering VRP(s) |
|---|---|---|---|
2a01:80a0:1::/48 | - not-found | no covering VRP | |
2a01:80a0:1000::/36 | - not-found | no covering VRP | |
2a01:80a0:ffff::/48 | - not-found | no covering VRP |
Random-IP probe (yarrp) into the AS' prefixes
We probed 70 arbitrary IPv6 address(es) inside AS62156's announced prefix(es). No router inside the prefix responded. The deepest visible hop was 2a02:ab8:0:ff::1e6 at hop 17 - that router answers ICMPv6 Echo. This is not in AS62156's announced prefix; operationally it's the AS-edge / peering interface (often on an IXP 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 2026-09-23T13:33:46Z
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 | sox-pn.sox.rs 2001:7f8:1e:8::3a | 0.2ms | 0% | AS13004 | SOX - Serbian Open Exchange DOO, RS |
| 3 | 2001:7f8:1e:8::3d | 0.5ms | 0% | AS13004 | SOX - Serbian Open Exchange DOO, RS |
| 4 | 2001:67c:128c::699 | 39.7ms | 0% | - | NA |
| 5 | hu0-15-0-0.lontr4.London.opentransit.net 2001:688:0:2::c3 | 39.8ms | 0% | AS5511 | Opentransit - Orange S.A., FR |
| 6 | * | - | - | - | |
| 7 | be4.core2.ams2.he.net 2001:470:0:293::2 | 43.6ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 8 | be1.core2.fra2.he.net 2001:470:e:43::2 | 39.7ms | 10% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 9 | be4.core1.vie1.he.net 2001:470:e:149::2 | 40.7ms | 30% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 10 | vix1.kapper.net @VIX / AAIX / SAIX / TIROL-IX / ERA-IX 2001:7f8:30:0:1:1:4:8943 | 42.7ms | 0% | - | NA |
| 11 | 2a01:80a0:1::1 | 42.5ms | 0% | AS62156 | HXS - HXS GmbH, AT |
Rate-limited ICMPv6: hop 8, hop 9 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.014ms pmtu 1500
1: _gateway 0.509ms
1: _gateway 0.475ms
2: sox-pn.sox.rs 0.386ms
3: 2001:7f8:1e:8::3d 0.616ms asymm 2
4: 2001:67c:128c::699 15.729ms
5: hu0-15-0-0.lontr4.London.opentransit.net 40.154ms asymm 6
6: no reply
7: be4.core2.ams2.he.net 42.036ms
8: be7.core2.fra2.he.net 42.598ms asymm 6
9: be4.core1.vie1.he.net 43.092ms asymm 5
10: vix1.kapper.net 41.798ms asymm 3
11: 2a01:80a0:1::1 42.591ms reached
Resume: pmtu 1500 hops 11 back 4 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 | 0.4ms | 0%* | AS59645 | WYBT-NET - Tobias Fiebig, DE |
| 2 | ae0-2453.cr10.ber01.lwlcom.net 2a06:d1c0::dead:beef:1c02 | 0.8ms | 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 | 18.1ms | 0% | AS8218 | NEO-ASN - Zayo Infrastructure France SA, FR |
| 5 | 2001:1b48:2:7::1:2 | 18.3ms | 0% | AS8218 | NEO-ASN - Zayo Infrastructure France SA, FR |
| 6 | 2001:1b48:2:107::8:2 | 18.2ms | 0% | AS8218 | NEO-ASN - Zayo Infrastructure France SA, FR |
| 7 | bgp01-ten0-0-0-vl4006.bgp01-bgp02.core.kapper.net 2a02:ab8:0:ff::21a | 18.2ms | 0% | AS48943 | KAPPERNET - KAPPER NETWORK-COMMUNICATIONS GmbH, AT |
| 8 | vl4011.cr01.vivi1.kapper.net 2a02:ab8:0:ff::1f4 | 18.4ms | 0% | AS48943 | KAPPERNET - KAPPER NETWORK-COMMUNICATIONS GmbH, AT |
| 9 | 2a01:80a0:1::1 | 18.0ms | 0% | AS62156 | HXS - HXS GmbH, AT |
tracepath -6
1?: [LOCALHOST] 0.022ms pmtu 1500
1: xe-0-0-13-178.gw01.ber01.as59645.net 0.437ms
1: xe-0-0-13-178.gw01.ber01.as59645.net 0.454ms
2: ae0-2453.cr10.ber01.lwlcom.net 1.071ms
3: zayoeurope.bcix.de 10.311ms asymm 8
4: 2001:1b48:2:2::6:2 18.430ms asymm 5
5: 2001:1b48:2:7::1:2 18.350ms
6: 2001:1b48:2:107::8:2 18.544ms asymm 7
7: bgp01-ten0-0-0-vl4006.bgp01-bgp02.core.kapper.net 18.383ms asymm 6
8: vl4011.cr01.vivi1.kapper.net 19.052ms asymm 5
9: 2a01:80a0:1::1 18.558ms reached
Resume: pmtu 1500 hops 9 back 6 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 | ipv6.decix-dusseldorf.core1.dus1.he.net 2001:7f8:9e::1b1b:0:1 | 5.8ms | 0% | - | NA |
| 3 | 100ge0-0-0-18.core4.fra1.he.net 2001:470:0:52e::1 | 16.0ms | 40% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 4 | be8.core1.prg1.he.net 2001:470:e:1e::2 | 21.1ms | 10% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 5 | be3.core1.vie1.he.net 2001:470:e:a7::2 | 16.7ms | 20% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 6 | vix1.kapper.net @VIX / AAIX / SAIX / TIROL-IX / ERA-IX 2001:7f8:30:0:1:1:4:8943 | 20.5ms | 0% | - | NA |
| 7 | 2a01:80a0:1::1 | 20.2ms | 0% | AS62156 | HXS - HXS GmbH, AT |
Rate-limited ICMPv6: hop 3, hop 4, hop 5 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.014ms pmtu 1500
1: xe-0-0-12-142.gw01.dus01.as59645.net 0.303ms
1: xe-0-0-12-142.gw01.dus01.as59645.net 0.219ms
2: ipv6.decix-dusseldorf.core1.dus1.he.net 7.456ms asymm 3
3: 100ge0-0-0-18.core4.fra1.he.net 6.210ms asymm 4
4: be8.core1.prg1.he.net 14.114ms asymm 5
5: be3.core1.vie1.he.net 18.654ms asymm 4
6: vix1.kapper.net 20.761ms
7: 2a01:80a0:1::1 20.331ms reached
Resume: pmtu 1500 hops 7 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 | 2.2ms | 0% | AS203993 | GNA-DC1-AS - S.J.M. Steffann, NL |
| 2 | gw.friends.steffann.nl 2a00:8642:1000:f000::1 | 6.1ms | 0%* | AS203993 | GNA-DC1-AS - S.J.M. Steffann, NL |
| 3 | 2a00:1ca8:1::194 | 6.6ms | 0% | AS50673 | Serverius-as - Serverius Holding B.V., NL |
| 4 | 2a03:3f40::10:33 | 4.4ms | 0% | AS50673 | Serverius-as - Serverius Holding B.V., NL |
| 5 | zayo-nl.interxiondus2.nlsix.net 2001:7f8:13::a500:8218:2 | 12.5ms | 0% | - | NA |
| 6 | 2001:1b48:2:2::6:2 | 23.2ms | 0% | AS8218 | NEO-ASN - Zayo Infrastructure France SA, FR |
| 7 | 2001:1b48:2:7::1:2 | 25.0ms | 0% | AS8218 | NEO-ASN - Zayo Infrastructure France SA, FR |
| 8 | 2001:1b48:2:107::8:2 | 24.0ms | 0% | AS8218 | NEO-ASN - Zayo Infrastructure France SA, FR |
| 9 | bgp01-ten0-0-0-vl4006.bgp01-bgp02.core.kapper.net 2a02:ab8:0:ff::21a | 22.1ms | 0% | AS48943 | KAPPERNET - KAPPER NETWORK-COMMUNICATIONS GmbH, AT |
| 10 | vl4011.cr01.vivi1.kapper.net 2a02:ab8:0:ff::1f4 | 23.7ms | 0% | AS48943 | KAPPERNET - KAPPER NETWORK-COMMUNICATIONS GmbH, AT |
| 11 | 2a01:80a0:1::1 | 23.9ms | 0% | AS62156 | HXS - HXS GmbH, AT |
tracepath -6
1?: [LOCALHOST] 0.040ms pmtu 1500
1: 2a00:8642:42::2 2.516ms
1: 2a00:8642:42::2 2.771ms
2: no reply
3: 2a00:1ca8:1::194 5.647ms
4: 2a03:3f40::10:33 6.722ms
5: zayo-nl.interxiondus2.nlsix.net 12.647ms
6: 2001:1b48:2:2::6:2 26.401ms
7: 2001:1b48:2:7::1:2 25.276ms
8: 2001:1b48:2:107::8:2 24.354ms asymm 9
9: bgp01-ten0-0-0-vl4006.bgp01-bgp02.core.kapper.net 36.072ms asymm 8
10: vl4011.cr01.vivi1.kapper.net 24.175ms asymm 7
11: 2a01:80a0:1::1 26.978ms reached
Resume: pmtu 1500 hops 11 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 | * | - | 10% | - | |
| 4 | * | - | - | - | |
| 5 | 100ge0-0-0-20.core1.vie1.he.net 2001:470:0:414::1 | 22.1ms | 30% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 6 | vix1.kapper.net @VIX / AAIX / SAIX / TIROL-IX / ERA-IX 2001:7f8:30:0:1:1:4:8943 | 16.5ms | 0% | - | NA |
| 7 | 2a01:80a0:1::1 | 15.7ms | 0% | AS62156 | HXS - HXS GmbH, AT |
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] 0.039ms pmtu 1500
1: karsolink-01.net.karsolink.com 0.680ms
1: karsolink-01.net.karsolink.com 0.667ms
2: 2a12:d8c0:109f:121::a1 0.772ms
3: no reply
4: no reply
5: 100ge0-0-0-20.core1.vie1.he.net 23.454ms
6: vix1.kapper.net 17.261ms
7: 2a01:80a0:1::1 16.081ms reached
Resume: pmtu 1500 hops 7 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 | 0.4ms | 0%* | AS8038 | 6CONNECT - 6connect, Inc., US |
| 2 | * | - | - | - | |
| 3 | 2a03:a100:0:201:1::1 | 1.3ms | 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 | 2.3ms | 40% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 5 | 100ge0-0-0-5.core1.vie1.he.net 2001:470:0:578::1 | 9.1ms | 20% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 6 | vix1.kapper.net @VIX / AAIX / SAIX / TIROL-IX / ERA-IX 2001:7f8:30:0:1:1:4:8943 | 7.9ms | 0% | - | NA |
| 7 | 2a01:80a0:1::1 | 7.7ms | 0% | AS62156 | HXS - HXS GmbH, AT |
Rate-limited ICMPv6: hop 4, hop 5 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.064ms pmtu 9000
1: fw1-lju.6connect.com 0.578ms
1: fw1-lju.6connect.com 0.536ms
2: no reply
3: 2a03:a100:0:201:1::1 1.516ms
4: 2a03:a100:0:201:1::1 0.925ms pmtu 1500
4: e0-1.core1.lju1.he.net 2.067ms
5: 100ge0-0-0-5.core1.vie1.he.net 8.290ms
6: vix1.kapper.net 8.490ms asymm 4
7: 2a01:80a0:1::1 8.150ms reached
Resume: pmtu 1500 hops 7 back 5 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 | * | - | 0%* | - | |
| 2 | 2a01:260:1::225 | 2.5ms | 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 | 2.1ms | 0%* | AS34779 | T-2-AS - T-2, d.o.o., SI |
| 4 | * | - | - | - | |
| 5 | * | - | 0% | - | |
| 6 | 100ge0-0-0-31.core1.vie1.he.net 2001:470:0:4a8::1 | 11.1ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 7 | 2a01:80a0:1::1 | 10.5ms | 0% | AS62156 | HXS - HXS GmbH, AT |
tracepath -6
1?: [LOCALHOST] 0.026ms pmtu 1500
1: no reply
2: 2a01:260:1::225 2.898ms
3: 2a01-260-1-1--9a.core6.t-2.net 2.643ms
4: 2a01-260-1-1--38.core6.t-2.net 2.889ms asymm 3
5: 100ge0-0-0-31.core1.vie1.he.net 12.345ms
6: vix1.kapper.net 11.288ms asymm 5
7: 2a01:80a0:1::1 10.814ms reached
Resume: pmtu 1500 hops 7 back 6