AS overview
Test target: 2a00:9520::1 · static prefix probe · address space: mixed · prefixes announced: 1
prefix(es): 2a00:9520::/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 | ||
2a00:9520::1 | prb | ✓ | ✓ | refused | refused | - | ✓ | ✓ | refused | refused | - | ✓ | ✓ | refused | refused | - | ✓ | ✓ | ? | ? | - | ✓ | ✓ | refused | refused | - | ✓ | ✓ | refused | refused | - | ✓ | ✓ | refused | refused | - |
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 2021-07-21. IPv6 LAN: 2001:7f8:b:100:1d1:a5d5:6641:158. Locations: -.
RPKI & ASPA
1 of 1 prefix(es) covered by a valid ROA.
| Prefix | RPKI state | Reason | Covering VRP(s) |
|---|---|---|---|
2a00:9520::/48 | ✓ valid | matched VRP (correct origin, length within maxLength) | AS56641 /32 maxLen 48 (ripe) |
Random-IP probe (yarrp) into the AS' prefixes
We probed 35 arbitrary IPv6 address(es) inside AS56641's announced prefix(es). No router inside the prefix responded. The deepest visible hop was 2001:470:1:7c7::2 at hop 10 - that router answers ICMPv6 Echo. This is not in AS56641'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 2026-09-23T12:01:07Z
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 | sox-pn.sox.rs 2001:7f8:1e:8::3a | 0.5ms | 0% | AS13004 | SOX - Serbian Open Exchange DOO, RS |
| 3 | e0-33.core2.beg1.he.net 2001:470:1:6e5::1 | 1.3ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 4 | e0-34.core2.bts1.he.net 2001:470:0:33f::2 | 8.3ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 5 | 100ge0-0-0-2.core1.vie1.he.net 2001:470:0:412::1 | 10.8ms | 40% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 6 | * | - | - | - | |
| 7 | anima-sgr-spa.e0-12.core2.mil1.he.net 2001:470:1:7c7::2 | 20.1ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
Rate-limited ICMPv6: hop 5 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.011ms pmtu 1500
1: _gateway 0.696ms
1: _gateway 0.346ms
2: sox-pn.sox.rs 14.406ms
3: e0-33.core2.beg1.he.net 1.356ms
4: e0-34.core2.bts1.he.net 8.680ms
5: no reply
6: no reply
7: anima-sgr-spa.e0-12.core2.mil1.he.net 20.131ms reached
Resume: pmtu 1500 hops 7 back 7 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 | 0.3ms | 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 | hurricane-electric.bcix.de 2001:7f8:19:1::1b1b:1 | 15.7ms | 0% | - | NA |
| 4 | * | - | - | - | |
| 5 | be47.core1.prg1.he.net 2001:470:e:67::2 | 15.9ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 6 | * | - | 50% | - | |
| 7 | be10.core1.zrh2.he.net 2001:470:e:153::2 | 21.3ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 8 | be1.core1.mil2.he.net 2001:470:e:dd::1 | 24.7ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 9 | * | - | - | - | |
| 10 | * | - | 0% | - | |
| 11 | * | - | - | - | |
| 12 | * | - | - | - | |
| 13 | * | - | - | - | |
| 14 | * | - | - | - |
Rate-limited ICMPv6: hop 6 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.040ms pmtu 1500
1: xe-0-0-13-178.gw01.ber01.as59645.net 0.658ms
1: xe-0-0-13-178.gw01.ber01.as59645.net 0.553ms
2: ae0-2453.cr10.ber01.lwlcom.net 0.889ms
3: hurricane-electric.bcix.de 18.350ms asymm 6
4: no reply
5: be47.core1.prg1.he.net 15.743ms asymm 6
6: be8.core4.fra1.he.net 16.591ms asymm 5
7: be10.core1.zrh2.he.net 20.930ms asymm 6
8: be1.core1.mil2.he.net 26.001ms asymm 7
9: no reply
10: no reply
11: no reply
12: no reply
13: no reply
14: 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 | xe-0-0-12-142.gw01.dus01.as59645.net 2a06:d1c1:100:d::1 | 0.2ms | 0%* | AS59645 | WYBT-NET - Tobias Fiebig, DE |
| 2 | ipv6.decix-dusseldorf.core1.dus1.he.net 2001:7f8:9e::1b1b:0:1 | 5.7ms | 0% | - | NA |
| 3 | * | - | 60% | - | |
| 4 | be10.core1.zrh2.he.net 2001:470:e:153::2 | 11.3ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 5 | be1.core1.mil2.he.net 2001:470:e:dd::1 | 16.1ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 6 | * | - | - | - | |
| 7 | anima-sgr-spa.e0-12.core2.mil1.he.net 2001:470:1:7c7::2 | 14.1ms | 10% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
Rate-limited ICMPv6: hop 3, hop 7 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.018ms pmtu 1500
1: xe-0-0-12-142.gw01.dus01.as59645.net 0.307ms
1: xe-0-0-12-142.gw01.dus01.as59645.net 0.288ms
2: ipv6.decix-dusseldorf.core1.dus1.he.net 6.379ms asymm 3
3: no reply
4: be10.core1.zrh2.he.net 12.580ms asymm 5
5: be1.core1.mil2.he.net 16.884ms asymm 6
6: no reply
7: anima-sgr-spa.e0-12.core2.mil1.he.net 14.364ms reached
Resume: pmtu 1500 hops 7 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 | 1.2ms | 0% | AS203993 | GNA-DC1-AS - S.J.M. Steffann, NL |
| 2 | * | - | 0%* | - | |
| 3 | speed-ix.he.net 2001:7f8:b7::a500:6939:1 | 5.8ms | 0% | - | NA |
| 4 | be2.core4.fra1.he.net 2001:470:e:38::2 | 10.6ms | 20% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 5 | be10.core1.zrh2.he.net 2001:470:e:153::2 | 18.1ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 6 | be1.core1.mil2.he.net 2001:470:e:dd::1 | 19.9ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 7 | * | - | - | - | |
| 8 | anima-sgr-spa.e0-12.core2.mil1.he.net 2001:470:1:7c7::2 | 18.9ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
Rate-limited ICMPv6: hop 4 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.041ms pmtu 1500
1: 2a00:8642:42::2 0.895ms
1: 2a00:8642:42::2 3.357ms
2: no reply
3: speed-ix.he.net 7.492ms
4: be2.core4.fra1.he.net 14.830ms
5: be10.core1.zrh2.he.net 18.901ms
6: be1.core1.mil2.he.net 22.239ms
7: no reply
8: anima-sgr-spa.e0-12.core2.mil1.he.net 62.760ms reached
Resume: pmtu 1500 hops 8 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 | karsolink-01.net.karsolink.com 2a12:d8c0:105a:9001::1 | 0.3ms | 0%* | AS204471 | KARSOLINK - 2S Computers SRL, IT |
| 2 | 2a12:d8c0:109f:121::a1 | 0.3ms | 0%* | AS204471 | KARSOLINK - 2S Computers SRL, IT |
| 3 | 2a12:d8c0:101f:103::1 | 8.6ms | 90% | AS204471 | KARSOLINK - 2S Computers SRL, IT |
| 4 | * | - | - | - | |
| 5 | * | - | 0% | - | |
| 6 | * | - | - | - | |
| 7 | * | - | - | - | |
| 8 | * | - | - | - | |
| 9 | * | - | - | - | |
| 10 | * | - | - | - | |
| 11 | * | - | - | - | |
| 12 | * | - | - | - | |
| 13 | * | - | - | - | |
| 14 | * | - | - | - |
Rate-limited ICMPv6: hop 3 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.045ms pmtu 1500
1: karsolink-01.net.karsolink.com 1.245ms
2: 2a12:d8c0:109f:121::a1 0.639ms
3: 2a12:d8c0:101f:103::1 9.845ms
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
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 | 0.7ms | 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 | 2.2ms | 60% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 5 | * | - | - | - | |
| 6 | port-channel1.core1.zag2.he.net 2001:470:0:2ea::2 | 5.5ms | 60% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 7 | * | - | - | - | |
| 8 | anima-sgr-spa.e0-12.core2.mil1.he.net 2001:470:1:7c7::2 | 12.7ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
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] 0.021ms pmtu 9000
1: fw1-lju.6connect.com 5.749ms
1: fw1-lju.6connect.com 0.592ms
2: no reply
3: 2a03:a100:0:201:1::1 1.371ms
4: 2a03:a100:0:201:1::1 1.347ms pmtu 1500
4: e0-1.core1.lju1.he.net 2.189ms
5: no reply
6: port-channel1.core1.zag2.he.net 4.257ms
7: no reply
8: anima-sgr-spa.e0-12.core2.mil1.he.net 12.951ms reached
Resume: pmtu 1500 hops 8 back 8 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 | 2a01:261:313:b814::1 | 0.7ms | 0%* | AS34779 | T-2-AS - T-2, d.o.o., SI |
| 2 | 2a01:260:1::225 | 3.0ms | 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 | 2.7ms | 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 | 2.6ms | 0%* | AS34779 | T-2-AS - T-2, d.o.o., SI |
| 5 | port-channel1.core1.zag2.he.net 2001:470:0:2ea::2 | 10.1ms | - | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 6 | * | - | 0% | - | |
| 7 | * | - | - | - | |
| 8 | * | - | 0% | - | |
| 9 | * | - | - | - | |
| 10 | * | - | - | - | |
| 11 | * | - | - | - | |
| 12 | * | - | - | - | |
| 13 | * | - | - | - | |
| 14 | * | - | - | - |
tracepath -6
1?: [LOCALHOST] 0.027ms pmtu 1500
1: 2a01:261:313:b814::1 0.699ms
1: 2a01:261:313:b814::1 0.804ms
2: 2a01:260:1::225 18.826ms
3: 2a01-260-1-1--9c.core6.t-2.net 4.055ms
4: 2a01-260-1-1--38.core6.t-2.net 2.699ms asymm 3
5: no reply
6: port-channel1.core1.zag2.he.net 10.652ms 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
Too many hops: pmtu 1500
Resume: pmtu 1500