AS overview
Test target: 2a03:c380:4010:0:213:174:160:2 · ns3.acantho.net · address space: PA · prefixes announced: 1
prefix(es): 2a03:c380::/32
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 | ||
2a03:c380:4010:0:213:174:160:2ns3.acantho.net | NS | ✓ | ✓ | ? | ? | - | ✓ | ✓ | ? | ? | - | ✓ | ✓ | ? | ? | - | ✓ | ✓ | ? | ? | - | ✓ | ✓ | ? | ? | - | ✓ | ✓ | ? | ? | - | ✓ | ✓ | ? | ? | - |
MIX-IT / NAMEX / MINAP / TOP-IX / VSIX / EQUINIX-MILAN / BGPX-ROME / NAMEX-BARI / PCIX / DECIX-PALERMO peering
MIX-IT / NAMEX / MINAP / TOP-IX / VSIX / EQUINIX-MILAN / BGPX-ROME / NAMEX-BARI / PCIX / DECIX-PALERMO member - Open peering, peering member, since 2013-05-20. IPv6 LAN: 2001:7f8:b:100:1d1:a5d2:1309:84. Locations: -.
RPKI & ASPA
1 of 1 prefix(es) covered by a valid ROA.
| Prefix | RPKI state | Reason | Covering VRP(s) |
|---|---|---|---|
2a03:c380::/32 | ✓ valid | matched VRP (correct origin, length within maxLength) | AS21309 /32 maxLen 32 (ripe) |
Random-IP probe (yarrp) into the AS' prefixes
We probed 35 arbitrary IPv6 address(es) inside AS21309's announced prefix(es). No router inside the prefix responded. The deepest visible hop was 2001:7f8:b:100:1d1:a5d2:1309:84 at hop 12 - that router does not answer ICMPv6 Echo. This is not in AS21309'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 2026-09-23T12:03:49Z
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::4 | 0.6ms | 0% | AS13004 | SOX - Serbian Open Exchange DOO, RS |
| 3 | 2001:7f8:30:0:2:1:0:9002 | 23.8ms | 0% | - | NA |
| 4 | RT.VSX.PDA.IT.retn.net 2a02:2d8::57f5:e07e | 20.9ms | 0% | AS9002 | RETN-AS - RETN Limited, GB |
| 5 | GW-AS21309.retn.net 2a02:2d8:4:180f:232a::1 | 35.0ms | 0% | AS9002 | RETN-AS - RETN Limited, GB |
| 6 | fc00:13::1 | 36.5ms | 80% | - | NA |
| 7 | ffff:10 | 35.3ms | 0% | - | |
| 8 | * | - | - | - | |
| 9 | * | - | - | - | |
| 10 | * | - | - | - | |
| 11 | * | - | - | - | |
| 12 | * | - | 0% | - | |
| 13 | * | - | - | - | |
| 14 | * | - | - | - | |
| 15 | * | - | - | - | |
| 16 | * | - | - | - | |
| 17 | * | - | - | - |
Rate-limited ICMPv6: hop 6 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.017ms pmtu 1500
1: _gateway 0.442ms
1: _gateway 0.454ms
2: 2001:7f8:1e::4 0.448ms
3: 2001:7f8:30:0:2:1:0:9002 43.176ms
4: RT.VSX.PDA.IT.retn.net 35.071ms
5: GW-AS21309.retn.net 35.078ms asymm 11
6: no reply
7: ::ffff:10.13.1.18 35.286ms asymm 13
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
17: 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 | 0.7ms | 0%* | AS59645 | WYBT-NET - Tobias Fiebig, DE |
| 3 | retn.bcix.de 2001:7f8:19:1::232a:1 | 10.3ms | 0% | - | NA |
| 4 | RT.VSX.PDA.IT.retn.net 2a02:2d8::57f5:e07e | 62.3ms | 0% | AS9002 | RETN-AS - RETN Limited, GB |
| 5 | GW-AS21309.retn.net 2a02:2d8:4:180f:232a::1 | 25.4ms | 0% | AS9002 | RETN-AS - RETN Limited, GB |
| 6 | * | - | 40% | - | |
| 7 | * | - | - | - | |
| 8 | * | - | - | - | |
| 9 | * | - | - | - | |
| 10 | * | - | - | - | |
| 11 | * | - | - | - | |
| 12 | * | - | 0% | - | |
| 13 | * | - | - | - | |
| 14 | * | - | - | - | |
| 15 | * | - | - | - | |
| 16 | * | - | - | - | |
| 17 | * | - | - | - |
Rate-limited ICMPv6: hop 6 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.029ms pmtu 1500
1: xe-0-0-13-178.gw01.ber01.as59645.net 0.304ms
1: xe-0-0-13-178.gw01.ber01.as59645.net 0.340ms
2: ae0-2453.cr10.ber01.lwlcom.net 0.642ms
3: retn.bcix.de 10.619ms asymm 5
4: RT.VSX.PDA.IT.retn.net 22.763ms asymm 5
5: GW-AS21309.retn.net 25.599ms asymm 12
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
17: 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 | 15.6ms | 0% | AS24961 | MYLOC-AS - WIIT AG, DE |
| 3 | lag10-h5f01.agr4-dus1.bb.wiit.network 2001:4ba0:ffe9:7c::1 | 159.5ms | 0% | AS24961 | MYLOC-AS - WIIT AG, DE |
| 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 | 4.2ms | 0% | AS24961 | MYLOC-AS - WIIT AG, DE |
| 6 | lag0-vl1001.core1-nbg-ncd.bb.wiit.network 2001:4ba0:ffe9:103e::1 | 6.8ms | 0% | AS24961 | MYLOC-AS - WIIT AG, DE |
| 7 | lag0-vl6.core2-nbg-ncd.bb.wiit.network 2001:4ba0:ffe9:103b::1 | 6.9ms | 0% | AS24961 | MYLOC-AS - WIIT AG, DE |
| 8 | 2001:4ba0:ffe9:b8 | 9.5ms | 0% | - | |
| 9 | lag0-vl1009.core1-muc-eq3.bb.wiit.network 2001:4ba0:ffe9:a7::1 | 9.7ms | 0% | AS24961 | MYLOC-AS - WIIT AG, DE |
| 10 | lag0-vl1001.core1-pda-vsix.bb.wiit.network 2001:4ba0:ffe9:da::2 | 20.4ms | 0% | AS24961 | MYLOC-AS - WIIT AG, DE |
| 11 | lag0-vl1001.core1-mil-mix.bb.wiit.network 2001:4ba0:ffe9:db::2 | 20.3ms | 0% | AS24961 | MYLOC-AS - WIIT AG, DE |
| 12 | acantho-v6.mix-it.net @MIX-IT / NAMEX / MINAP / TOP-IX / VSIX / EQUINIX-MILAN / BGPX-ROME / NAMEX-BARI / PCIX / DECIX-PALERMO 2001:7f8:b:100:1d1:a5d2:1309:84 | 24.9ms | 70% | - | NA |
| 13 | * | - | - | - | |
| 14 | * | - | - | - | |
| 15 | * | - | - | - | |
| 16 | * | - | - | - | |
| 17 | * | - | - | - |
Rate-limited ICMPv6: hop 12 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.032ms pmtu 1500
1: xe-0-0-12-142.gw01.dus01.as59645.net 0.544ms
1: xe-0-0-12-142.gw01.dus01.as59645.net 0.190ms
2: eth1-0-12-h5594.edge5-dus1.bb.wiit.network 6.321ms
3: no reply
4: lag11.core3-dus1.bb.wiit.network 0.647ms
5: lag0-vl1011.core1-fra-ix.bb.wiit.network 4.205ms
6: lag0-vl1001.core1-nbg-ncd.bb.wiit.network 7.061ms
7: lag0-vl6.core2-nbg-ncd.bb.wiit.network 6.896ms
8: lag0-vl1006.core2-muc2.bb.wiit.network 9.412ms
9: lag0-vl1009.core1-muc-eq3.bb.wiit.network 9.625ms
10: lag0-vl1001.core1-pda-vsix.bb.wiit.network 20.430ms
11: lag0-vl1001.core1-mil-mix.bb.wiit.network 20.299ms asymm 9
12: no reply
13: no reply
14: no reply
15: no reply
16: no reply
17: 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 | 3.4ms | 0% | AS203993 | GNA-DC1-AS - S.J.M. Steffann, NL |
| 2 | gw.friends.steffann.nl 2a00:8642:1000:f000::1 | 8.2ms | 0%* | AS203993 | GNA-DC1-AS - S.J.M. Steffann, NL |
| 3 | ccr2-ccr1.dc1.nogalliance.org 2a00:8642:dc1:2::b | 3.2ms | 0% | AS203993 | GNA-DC1-AS - S.J.M. Steffann, NL |
| 4 | ams-ix.retn.net 2001:7f8:1::a500:9002:1 | 5.8ms | 0% | - | NA |
| 5 | RT.VSX.PDA.IT.retn.net 2a02:2d8::57f5:e07e | 25.6ms | 0% | AS9002 | RETN-AS - RETN Limited, GB |
| 6 | GW-AS21309.retn.net 2a02:2d8:4:180f:232a::1 | 27.6ms | 0% | AS9002 | RETN-AS - RETN Limited, GB |
| 7 | * | - | - | - | |
| 8 | * | - | - | - | |
| 9 | * | - | - | - | |
| 10 | * | - | - | - | |
| 11 | * | - | - | - | |
| 12 | * | - | - | - | |
| 13 | * | - | 0% | - | |
| 14 | * | - | - | - | |
| 15 | * | - | - | - | |
| 16 | * | - | - | - | |
| 17 | * | - | - | - |
tracepath -6
1?: [LOCALHOST] 0.043ms pmtu 1500
1: 2a00:8642:42::2 2.871ms
1: 2a00:8642:42::2 4.172ms
2: no reply
3: ccr2-ccr1.dc1.nogalliance.org 4.092ms asymm 2
4: ams-ix.retn.net 5.452ms asymm 7
5: RT.VSX.PDA.IT.retn.net 23.859ms asymm 6
6: GW-AS21309.retn.net 31.783ms asymm 7
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
17: 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 | * | - | 0%* | - | |
| 3 | * | - | - | - | |
| 4 | acantho-v6.mix-it.net @MIX-IT / NAMEX / MINAP / TOP-IX / VSIX / EQUINIX-MILAN / BGPX-ROME / NAMEX-BARI / PCIX / DECIX-PALERMO 2001:7f8:b:100:1d1:a5d2:1309:84 | 13.2ms | 0% | - | NA |
| 5 | * | - | - | - | |
| 6 | * | - | - | - | |
| 7 | * | - | - | - | |
| 8 | * | - | - | - | |
| 9 | * | - | - | - | |
| 10 | * | - | 0% | - | |
| 11 | * | - | - | - | |
| 12 | * | - | - | - | |
| 13 | * | - | - | - | |
| 14 | * | - | - | - | |
| 15 | * | - | - | - | |
| 16 | * | - | - | - | |
| 17 | * | - | - | - |
tracepath -6
1?: [LOCALHOST] 0.033ms pmtu 1500
1: no reply
2: no reply
3: no reply
4: no reply
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
17: 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 | 0.3ms | 0%* | AS8038 | 6CONNECT - 6connect, Inc., US |
| 2 | * | - | - | - | |
| 3 | 2a03:a100:0:201:1::1 | 0.6ms | 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 | 1.9ms | 70% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 5 | * | - | - | - | |
| 6 | port-channel1.core1.zag2.he.net 2001:470:0:2ea::2 | 4.1ms | 80% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 7 | * | - | - | - | |
| 8 | * | - | - | - | |
| 9 | * | - | - | - | |
| 10 | * | - | - | - | |
| 11 | * | - | - | - | |
| 12 | * | - | - | - | |
| 13 | * | - | - | - | |
| 14 | * | - | 0% | - | |
| 15 | * | - | - | - |
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] 0.023ms pmtu 9000
1: fw1-lju.6connect.com 0.665ms
1: fw1-lju.6connect.com 0.619ms
2: no reply
3: 2a03:a100:0:201:1::1 1.020ms
4: 2a03:a100:0:201:1::1 0.978ms pmtu 1500
4: e0-1.core1.lju1.he.net 2.470ms
5: no reply
6: port-channel1.core1.zag2.he.net 4.649ms
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
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 | 11.6ms | 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 | 8.8ms | 0%* | AS34779 | T-2-AS - T-2, d.o.o., SI |
| 4 | 2a01-260-1-1--39.core6.t-2.net 2a01:260:1:1::39 | 8.8ms | 0% | AS34779 | T-2-AS - T-2, d.o.o., SI |
| 5 | be7.core2.fra2.he.net 2001:470:e:18::2 | 44.6ms | 10% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 6 | be7.core2.fra2.he.net 2001:470:e:18::2 | 44.5ms | 50% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 7 | be10.core1.zrh2.he.net 2001:470:e:153::2 | 52.7ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 8 | be1.core1.mil2.he.net 2001:470:e:dd::1 | 43.4ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 9 | be1.core1.mil2.he.net 2001:470:e:dd::1 | 44.4ms | - | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 10 | acantho-v6.mix-it.net @MIX-IT / NAMEX / MINAP / TOP-IX / VSIX / EQUINIX-MILAN / BGPX-ROME / NAMEX-BARI / PCIX / DECIX-PALERMO 2001:7f8:b:100:1d1:a5d2:1309:84 | 47.1ms | 80% | - | NA |
| 11 | acantho-v6.mix-it.net @MIX-IT / NAMEX / MINAP / TOP-IX / VSIX / EQUINIX-MILAN / BGPX-ROME / NAMEX-BARI / PCIX / DECIX-PALERMO 2001:7f8:b:100:1d1:a5d2:1309:84 | 48.9ms | - | - | NA |
| 12 | * | - | - | - | |
| 13 | * | - | - | - | |
| 14 | * | - | - | - | |
| 15 | * | - | - | - | |
| 16 | * | - | 0% | - | |
| 17 | * | - | - | - |
Rate-limited ICMPv6: hop 5, hop 6, hop 10 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.027ms pmtu 1500
1: no reply
2: 2a01:260:1::225 2.802ms
3: 2a01-260-1-1--9a.core6.t-2.net 2.313ms
4: 2a01-260-1-1--39.core6.t-2.net 2.831ms asymm 3
5: be7.core2.fra2.he.net 38.677ms
6: be1.core2.fra2.he.net 37.438ms asymm 5
7: be10.core1.zrh2.he.net 44.996ms asymm 8
8: be1.core1.mil2.he.net 33.567ms asymm 7
9: be1.core1.mil2.he.net 34.961ms asymm 7
10: no reply
11: no reply
12: no reply
13: no reply
14: no reply
15: no reply
16: no reply
17: no reply
Too many hops: pmtu 1500
Resume: pmtu 1500