AS overview
Test target: 2a0b:1a00::1 · static prefix probe · address space: mixed · prefixes announced: 2
prefix(es): 2a0b:1a00::/29, 2a0e:2680::/29
Targets & per-vantage-point probe results (1 target(s) across 3 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 | NL host (go6lab) | ITA host (Karsolink) | SLO host (6connect) | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ping | 1500B | :80 | :443 | reached | ping | 1500B | :80 | :443 | reached | ping | 1500B | :80 | :443 | reached | ||
2a0b:1a00::1 | prb | ✓ | ✓ | ? | ? | ✓ | ✓ | ✓ | 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 2022-12-22. IPv6 LAN: 2001:7f8:b:100:1d1:a520:7054:176. Locations: -.
RPKI & ASPA
2 of 2 prefix(es) covered by a valid ROA.
| Prefix | RPKI state | Reason | Covering VRP(s) |
|---|---|---|---|
2a0b:1a00::/29 | ✓ valid | matched VRP (correct origin, length within maxLength) | AS207054 /29 maxLen 29 (ripe) |
2a0e:2680::/29 | ✓ valid | matched VRP (correct origin, length within maxLength) | AS207054 /29 maxLen 29 (ripe) |
Random-IP probe (yarrp) into the AS' prefixes
We probed 30 arbitrary IPv6 address(es) inside AS207054's announced prefix(es). No router inside the prefix responded. The deepest visible hop was 2001:470:0:2ea::2 at hop 6 - that router answers ICMPv6 Echo. This is not in AS207054'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 2026-05-30T12:46:53Z
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::3 | 1.6ms | 0% | AS203993 | STEFFANN-DC-AS - S.J.M. Steffann, NL |
| 2 | gw.friends.steffann.nl 2a00:8642:1000:f000::1 | 2.7ms | 0%* | AS203993 | STEFFANN-DC-AS - S.J.M. Steffann, NL |
| 3 | * | - | - | - | |
| 4 | be1.core3.ams1.he.net 2001:470:e:5e::1 | 6.2ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 5 | be2.core4.fra1.he.net 2001:470:e:38::2 | 12.0ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 6 | * | - | - | - | |
| 7 | * | - | - | - | |
| 8 | * | - | - | - | |
| 9 | 2001:7f8:5f:ffff::73 | 22.7ms | 0% | - | NA |
| 10 | 2a0b:1a00:10:1 | 23.3ms | 0% | - | |
| 11 | 2a0b:1a00::1 | 23.0ms | 0% | AS207054 | FLYNET-IT - FLYNET SRL, IT |
tracepath -6
1?: [LOCALHOST] 0.030ms pmtu 1500
1: 2a00:8642:42::3 1.534ms
1: 2a00:8642:42::3 1.157ms
2: gw.friends.steffann.nl 1.670ms
3: no reply
4: be1.core3.ams1.he.net 4.400ms
5: be2.core4.fra1.he.net 10.222ms
6: no reply
7: no reply
8: no reply
9: 2001:7f8:5f:ffff::73 22.312ms
10: 2a0b:1a00:5:2::1 21.336ms asymm 9
11: 2a0b:1a00::1 23.905ms reached
Resume: pmtu 1500 hops 11 back 11 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 | 0.4ms | 0%* | AS204471 | KARSOLINK - 2S Computers SRL, IT |
| 2 | 2a12:d8c0:109f:121::a1 | 0.4ms | 0%* | AS204471 | KARSOLINK - 2S Computers SRL, IT |
| 3 | 2a12:d8c0:101f:103::1 | 8.5ms | 0% | AS204471 | KARSOLINK - 2S Computers SRL, IT |
| 4 | 2001:7f8:b9::31:1 | 8.1ms | 0% | - | NA |
| 5 | 2a0b:1a00:10:1 | 8.2ms | 0% | - | |
| 6 | 2a0b:1a00::1 | 9.3ms | 0% | AS207054 | FLYNET-IT - FLYNET SRL, IT |
tracepath -6
1?: [LOCALHOST] 0.031ms pmtu 1500
1: karsolink-01.net.karsolink.com 0.753ms
2: 2a12:d8c0:109f:121::a1 0.948ms
3: 2a12:d8c0:101f:103::1 8.963ms
4: 2001:7f8:b9::31:1 8.737ms
5: 2a0b:1a00:10:1:: 8.802ms
6: 2a0b:1a00::1 9.262ms reached
Resume: pmtu 1500 hops 6 back 6 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 | 0.8ms | 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 | 2.1ms | 60% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 5 | * | - | - | - | |
| 6 | port-channel1.core1.zag2.he.net 2001:470:0:2ea::2 | 4.7ms | 40% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 7 | * | - | - | - | |
| 8 | flynet-AS207054-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:a520:7054:176 | 11.9ms | 0% | - | NA |
| 9 | 2a0b:1a00:10:1 | 16.2ms | 0% | - | |
| 10 | 2a0b:1a00:10:1 | 15.5ms | 0% | - | |
| 11 | 2a0b:1a00::1 | 28.4ms | 0% | AS207054 | FLYNET-IT - FLYNET SRL, IT |
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] 0.030ms pmtu 1500
1: fw1-lju.6connect.com 0.391ms
1: fw1-lju.6connect.com 0.335ms
2: no reply
3: 2a03:a100:0:201:1::1 0.790ms
4: e0-1.core1.lju1.he.net 2.136ms
5: no reply
6: port-channel1.core1.zag2.he.net 4.373ms
7: no reply
8: 2001:7f8:5f:ffff::73 16.206ms
9: 2a0b:1a00:10:1:: 16.378ms
10: 2a0b:1a00:10:1:: 16.180ms asymm 9
11: 2a0b:1a00::1 16.500ms reached
Resume: pmtu 1500 hops 11 back 10