AS overview
Test target: 2a06:42c0::1 · static prefix probe · address space: PA · prefixes announced: 3
prefix(es): 2a06:42c0::/29, 2a0e:1ec0::/29, 2a0f:79c0::/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 | ||
2a06:42c0::1 | prb | ✓ | ✓ | open | open | ✓ | ✓ | ✓ | open | open | ✓ | ✓ | ✓ | open | open | ✓ |
RPKI & ASPA
3 of 3 prefix(es) covered by a valid ROA.
| Prefix | RPKI state | Reason | Covering VRP(s) |
|---|---|---|---|
2a06:42c0::/29 | ✓ valid | matched VRP (correct origin, length within maxLength) | AS200424 /29 maxLen 32 (ripe) |
2a0e:1ec0::/29 | ✓ valid | matched VRP (correct origin, length within maxLength) | AS200424 /29 maxLen 32 (ripe) |
2a0f:79c0::/29 | ✓ valid | matched VRP (correct origin, length within maxLength) | AS200424 /29 maxLen 32 (ripe) |
Random-IP probe (yarrp) into the AS' prefixes
We probed 30 arbitrary IPv6 address(es) inside AS200424's announced prefix(es). No router inside the prefix responded. The deepest visible hop was 2001:b00:1:1:1::1c3 at hop 8 - that router does not answer ICMPv6 Echo. This is not in AS200424'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 2026-05-30T12:45:42Z
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 | 1.1ms | 0% | AS203993 | STEFFANN-DC-AS - S.J.M. Steffann, NL |
| 2 | gw.friends.steffann.nl 2a00:8642:1000:f000::1 | 2.1ms | 0%* | AS203993 | STEFFANN-DC-AS - S.J.M. Steffann, NL |
| 3 | 2a00:1ca8:1::194 | 2.8ms | 0% | AS50673 | Serverius-as - Serverius Holding B.V., NL |
| 4 | 2a03:3f40::10:33 | 5.4ms | 0% | AS50673 | Serverius-as - Serverius Holding B.V., NL |
| 5 | 2001:7f8:1::a501:2874:1 | 24.9ms | 0% | - | NA |
| 6 | 2001:b00:1:1:3::13b | 20.3ms | 0% | AS12874 | FASTWEB - Fastweb SpA, IT |
| 7 | 2001:b00:1:1:1::1c5 | 21.7ms | 20% | AS12874 | FASTWEB - Fastweb SpA, IT |
| 8 | 2a06:42c0::1 | 22.2ms | 0% | AS200424 | CODEMA - Alessandro Coratelli trading as CODEMA, IT |
Rate-limited ICMPv6: hop 7 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.037ms pmtu 1500
1: 2a00:8642:42::3 1.633ms
1: 2a00:8642:42::3 1.393ms
2: no reply
3: 2a00:1ca8:1::194 3.044ms
4: 2a03:3f40::10:33 5.379ms
5: 2001:7f8:1::a501:2874:1 21.457ms
6: 2001:b00:1:1:3::139 21.469ms
7: 2001:b00:1:1:1::1c3 22.199ms
8: 2a06:42c0::1 22.708ms 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 | 0.4ms | 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:6::1 | 10.1ms | 20% | AS204471 | KARSOLINK - 2S Computers SRL, IT |
| 4 | fastweb.minap.it 2001:7f8:c5::a501:2874:1 | 11.0ms | 40% | AS12874 | Fastweb S.p.A. |
| 5 | 2001:b00:1:1:1::1a9 | 9.7ms | 0% | AS12874 | FASTWEB - Fastweb SpA, IT |
| 6 | 2001:b00:1:1:1::1c5 | 10.3ms | 0% | AS12874 | FASTWEB - Fastweb SpA, IT |
| 7 | 2a06:42c0::1 | 10.3ms | 0% | AS200424 | CODEMA - Alessandro Coratelli trading as CODEMA, IT |
Rate-limited ICMPv6: hop 3, hop 4 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.032ms pmtu 1500
1: no reply
2: 2a12:d8c0:109f:121::a1 0.853ms
3: 2a12:d8c0:101f:6::1 10.420ms
4: no reply
5: 2001:b00:1:1:1::1a7 10.108ms
6: 2001:b00:1:1:1::1c3 10.858ms
7: 2a06:42c0::1 11.717ms reached
Resume: pmtu 1500 hops 7 back 4 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 | 0.2ms | 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 | 2001:7f8:46:0:1::3303 | 8.0ms | 0% | AS51988 | ARNES-SIX - ARNES, SI |
| 5 | 2001:918:100:74::1 | 7.9ms | 0% | AS3303 | SWISSCOM - Swisscom (Schweiz) AG, CH |
| 6 | 2001:4d98:a000::119 | 165.9ms | 10% | - | NA |
| 7 | 2001:b00:1:1:1::1ad | 9.9ms | 0% | AS12874 | FASTWEB - Fastweb SpA, IT |
| 8 | 2001:b00:1:1:1::1c3 | 10.6ms | 0% | AS12874 | FASTWEB - Fastweb SpA, IT |
| 9 | 2a06:42c0::1 | 10.6ms | 0% | AS200424 | CODEMA - Alessandro Coratelli trading as CODEMA, IT |
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: fw1-lju.6connect.com 0.513ms
1: fw1-lju.6connect.com 0.583ms
2: no reply
3: 2a03:a100:0:201:1::1 0.933ms
4: 2001:7f8:46:0:1::3303 7.971ms
5: 2001:918:100:74::1 8.078ms
6: 2001:4d98:a000::119 24.248ms asymm 11
7: 2001:b00:1:1:3::139 10.421ms asymm 9
8: 2001:b00:1:1:1::1c5 10.795ms asymm 10
9: 2a06:42c0::1 10.320ms reached
Resume: pmtu 1500 hops 9 back 8