AS overview
Test target: 2a05:9d40:dc1:d1::2 · ns1.spadhausen.com · address space: unknown · prefixes announced: 2
prefix(es): 2a05:9d40::/29, 2a05:9d40:8000::/48
Targets & per-vantage-point probe results (2 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 | ||
2a05:9d40:dc1:d1::2ns1.spadhausen.com | drv | ✓ | ✓ | ? | ? | - | ✓ | ✓ | ? | ? | - | ✓ | ✓ | ? | ? | - |
2a05:9d40:dc2:d2::2ns2.spadhausen.com | drv | ✓ | ✓ | ? | ? | ✓ | ✓ | ✓ | 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 - Selective peering, peering member, since 2018-09-26. IPv6 LAN: 2001:7f8:b:100:1d1:a5d6:2166:36. Locations: -.
RPKI & ASPA
2 of 2 prefix(es) covered by a valid ROA.
| Prefix | RPKI state | Reason | Covering VRP(s) |
|---|---|---|---|
2a05:9d40::/29 | ✓ valid | matched VRP (correct origin, length within maxLength) | AS62166 /29 maxLen 29 (ripe) |
2a05:9d40:8000::/48 | ✓ valid | matched VRP (correct origin, length within maxLength) | AS62166 /48 maxLen 48 (ripe); AS62166 /29 maxLen 29 (ripe) |
Random-IP probe (yarrp) into the AS' prefixes
We probed 30 arbitrary IPv6 address(es) inside AS62166's announced prefix(es). No router inside the prefix responded. The deepest visible hop was 2a02:2d8::57f5:e080 at hop 6 - that router answers ICMPv6 Echo. This is not in AS62166'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 2026-05-30T12:45:34Z
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 | 1.3ms | 0% | AS203993 | STEFFANN-DC-AS - S.J.M. Steffann, NL |
| 2 | gw.friends.steffann.nl 2a00:8642:1000:f000::1 | 2.3ms | 0%* | AS203993 | STEFFANN-DC-AS - S.J.M. Steffann, NL |
| 3 | 2a00:1ca8:1::194 | 2.7ms | 10% | AS50673 | Serverius-as - Serverius Holding B.V., NL |
| 4 | 2a03:3f40::10:33 | 5.6ms | 0% | AS50673 | Serverius-as - Serverius Holding B.V., NL |
| 5 | 2a02:2d8:1:a001:232a | 4.1ms | 0% | - | |
| 6 | RT.MIX.MIL.IT.retn.net 2a02:2d8::57f5:e080 | 19.5ms | 0% | AS9002 | RETN-AS - RETN Limited, GB |
| 7 | GW-SpadHausen.retn.net 2a02:2d8:1:b804:232a::1 | 19.7ms | 0% | AS9002 | RETN-AS - RETN Limited, GB |
| 8 | host-2a05-9d40-0-0-0-0-2110-2.ip.spadhausen.com 2a05:9d40::2110:2 | 19.3ms | 0% | AS62166 | SPADHAUSEN - Spadhausen SRL Unipersonale, IT |
| 9 | host-2a05-9d40-0-0-0-0-2011-2.ip.spadhausen.com 2a05:9d40::2011:2 | 26.6ms | 0% | AS62166 | SPADHAUSEN - Spadhausen SRL Unipersonale, IT |
| 10 | host-2a05-9d40-0-0-0-0-6003-2.ip.spadhausen.com 2a05:9d40::6003:2 | 28.7ms | 0% | AS62166 | SPADHAUSEN - Spadhausen SRL Unipersonale, IT |
| 11 | * | - | 0% | - | |
| 12 | * | - | - | - | |
| 13 | * | - | - | - | |
| 14 | * | - | - | - | |
| 15 | * | - | - | - | |
| 16 | * | - | - | - | |
| 17 | * | - | - | - | |
| 18 | * | - | - | - | |
| 19 | * | - | - | - | |
| 20 | * | - | - | - | |
| 21 | * | - | - | - | |
| 22 | * | - | - | - | |
| 23 | * | - | - | - | |
| 24 | * | - | - | - |
Rate-limited ICMPv6: hop 3 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.033ms pmtu 1500
1: 2a00:8642:42::3 1.194ms
1: 2a00:8642:42::3 1.132ms
2: gw.friends.steffann.nl 2.297ms
3: 2a00:1ca8:1::194 2.708ms
4: 2a03:3f40::10:33 6.072ms
5: ae1-499.RT.SRV.DRO.NL.retn.net 4.419ms
6: RT.MIX.MIL.IT.retn.net 19.071ms
7: GW-SpadHausen.retn.net 18.954ms
8: host-2a05-9d40-0-0-0-0-2110-2.ip.spadhausen.com 19.180ms
9: host-2a05-9d40-0-0-0-0-2011-2.ip.spadhausen.com 27.247ms asymm 10
10: host-2a05-9d40-0-0-0-0-6003-2.ip.spadhausen.com 27.730ms asymm 11
11: no reply
12: no reply
13: no reply
14: no reply
15: no reply
16: no reply
17: no reply
18: no reply
19: no reply
20: no reply
21: no reply
22: no reply
23: no reply
24: 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 | 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 | spadhausen-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:a5d6:2166:36 | 14.2ms | 0% | - | NA |
| 5 | host-2a05-9d40-0-0-0-0-2110-2.ip.spadhausen.com 2a05:9d40::2110:2 | 14.2ms | 0% | AS62166 | SPADHAUSEN - Spadhausen SRL Unipersonale, IT |
| 6 | host-2a05-9d40-0-0-0-0-2011-2.ip.spadhausen.com 2a05:9d40::2011:2 | 19.3ms | 0% | AS62166 | SPADHAUSEN - Spadhausen SRL Unipersonale, IT |
| 7 | host-2a05-9d40-0-0-0-0-6003-2.ip.spadhausen.com 2a05:9d40::6003:2 | 17.5ms | 0% | AS62166 | SPADHAUSEN - Spadhausen SRL Unipersonale, IT |
| 8 | * | - | 0% | - | |
| 9 | * | - | - | - | |
| 10 | * | - | - | - | |
| 11 | * | - | - | - | |
| 12 | * | - | - | - | |
| 13 | * | - | - | - | |
| 14 | * | - | - | - | |
| 15 | * | - | - | - | |
| 16 | * | - | - | - | |
| 17 | * | - | - | - | |
| 18 | * | - | - | - | |
| 19 | * | - | - | - | |
| 20 | * | - | - | - | |
| 21 | * | - | - | - | |
| 22 | * | - | - | - | |
| 23 | * | - | - | - | |
| 24 | * | - | - | - |
tracepath -6
1?: [LOCALHOST] 0.028ms pmtu 1500
1: karsolink-01.net.karsolink.com 0.668ms
2: no reply
3: 2a12:d8c0:101f:103::1 9.095ms
4: spadhausen-v6.mix-it.net 14.582ms asymm 7
5: host-2a05-9d40-0-0-0-0-2110-2.ip.spadhausen.com 14.546ms asymm 8
6: host-2a05-9d40-0-0-0-0-2011-2.ip.spadhausen.com 19.912ms asymm 10
7: host-2a05-9d40-0-0-0-0-6003-2.ip.spadhausen.com 17.893ms asymm 11
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
18: no reply
19: no reply
20: no reply
21: no reply
22: no reply
23: no reply
24: 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 | 2a00:ee1:800:9::1 | 1.9ms | 0% | AS5603 | SIOL-NET - Telekom Slovenije, d.d., SI |
| 4 | 2a00:ee0:1:15::2 | 1.0ms | 0% | AS5603 | SIOL-NET - Telekom Slovenije, d.d., SI |
| 5 | de-cix1.rt.act.fkt.de.retn.net 2001:7f8::232a:0:1 | 16.0ms | 0% | - | NA |
| 6 | RT.MIX.MIL.IT.retn.net 2a02:2d8::57f5:e080 | 19.4ms | 0% | AS9002 | RETN-AS - RETN Limited, GB |
| 7 | GW-SpadHausen.retn.net 2a02:2d8:1:b804:232a::1 | 18.5ms | 0% | AS9002 | RETN-AS - RETN Limited, GB |
| 8 | host-2a05-9d40-0-0-0-0-2110-2.ip.spadhausen.com 2a05:9d40::2110:2 | 14.1ms | 0% | AS62166 | SPADHAUSEN - Spadhausen SRL Unipersonale, IT |
| 9 | host-2a05-9d40-0-0-0-0-2011-2.ip.spadhausen.com 2a05:9d40::2011:2 | 23.8ms | 0% | AS62166 | SPADHAUSEN - Spadhausen SRL Unipersonale, IT |
| 10 | host-2a05-9d40-0-0-0-0-6003-2.ip.spadhausen.com 2a05:9d40::6003:2 | 25.0ms | 0% | AS62166 | SPADHAUSEN - Spadhausen SRL Unipersonale, IT |
| 11 | * | - | 0% | - | |
| 12 | * | - | - | - | |
| 13 | * | - | - | - | |
| 14 | * | - | - | - | |
| 15 | * | - | - | - | |
| 16 | * | - | - | - | |
| 17 | * | - | - | - | |
| 18 | * | - | - | - | |
| 19 | * | - | - | - | |
| 20 | * | - | - | - | |
| 21 | * | - | - | - | |
| 22 | * | - | - | - | |
| 23 | * | - | - | - | |
| 24 | * | - | - | - |
tracepath -6
1?: [LOCALHOST] 0.029ms pmtu 1500
1: fw1-lju.6connect.com 0.559ms
1: fw1-lju.6connect.com 0.386ms
2: no reply
3: 2a00:ee1:800:9::1 2.024ms
4: 2a00:ee0:1:15::2 1.583ms asymm 3
5: de-cix1.rt.act.fkt.de.retn.net 14.619ms asymm 9
6: RT.MIX.MIL.IT.retn.net 31.220ms asymm 9
7: GW-SpadHausen.retn.net 13.971ms
8: host-2a05-9d40-0-0-0-0-2110-2.ip.spadhausen.com 14.120ms
9: host-2a05-9d40-0-0-0-0-2011-2.ip.spadhausen.com 25.496ms asymm 12
10: host-2a05-9d40-0-0-0-0-6003-2.ip.spadhausen.com 23.437ms asymm 13
11: no reply
12: no reply
13: no reply
14: no reply
15: no reply
16: no reply
17: no reply
18: no reply
19: no reply
20: no reply
21: no reply
22: no reply
23: no reply
24: no reply
Too many hops: pmtu 1500
Resume: pmtu 1500