AS overview
Test target: 2a0c:9a40:8e30::1 · static prefix probe · address space: unknown · prefixes announced: 1
prefix(es): 2a0c:9a40:8e30::/48
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 | ||
2a0c:9a40:8e30::1 | prb | ✓ | ✓ | open | open | ✓ | ✓ | ✓ | open | open | ✓ | ✓ | ✓ | open | open | ✓ |
RPKI & ASPA
1 of 1 prefix(es) covered by a valid ROA.
| Prefix | RPKI state | Reason | Covering VRP(s) |
|---|---|---|---|
2a0c:9a40:8e30::/48 | ✓ valid | matched VRP (correct origin, length within maxLength) | AS208229 /48 maxLen 48 (ripe) |
ASPA: this AS has published an ASPA record listing 3 upstream provider(s) that are authorized to propagate routes from it: AS6517, AS41720, AS216309. Routes from this AS that arrive via any other upstream are considered ASPA-invalid by validators that enforce ASPA.
Random-IP probe (yarrp) into the AS' prefixes
We probed 15 arbitrary IPv6 address(es) inside AS208229's announced prefix(es). No router inside the prefix responded. The deepest visible hop was 2001:978:2:2a::120:2 at hop 11 - that router answers ICMPv6 Echo. This is not in AS208229'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 2026-05-30T12:47:15Z
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 | 1.2ms | 0% | AS203993 | STEFFANN-DC-AS - S.J.M. Steffann, NL |
| 2 | gw.friends.steffann.nl 2a00:8642:1000:f000::1 | 1.9ms | 0%* | AS203993 | STEFFANN-DC-AS - S.J.M. Steffann, NL |
| 3 | 2a00:1ca8:1::194 | 2.0ms | 0% | AS50673 | Serverius-as - Serverius Holding B.V., NL |
| 4 | 2a03:3f40::10:41 | 3.2ms | 0% | AS50673 | Serverius-as - Serverius Holding B.V., NL |
| 5 | * | - | 90% | - | |
| 6 | * | - | 90% | - | |
| 7 | be2950.ccr42.fra05.atlas.cogentco.com 2001:550:0:1000::9a36:482a | 11.4ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 8 | * | - | 90% | - | |
| 9 | port-channel5892.ccr92.mil02.atlas.cogentco.com 2001:550:0:1000::9a36:3ed9 | 24.9ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 10 | be4466.rcr51.b019138-1.mil02.atlas.cogentco.com 2001:550:0:1000::9a36:4bbe | 24.9ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 11 | 2001:978:2:2a::120:2 | 27.6ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 12 | * | - | - | - | |
| 13 | 2a0c:9a40:8e30::1 | 45.2ms | 0% | AS208229 | MICHELE-ROBERTAZZI - MICHELE ROBERTAZZI, IT |
Rate-limited ICMPv6: hop 5, hop 6, hop 8 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.051ms pmtu 1500
1: 2a00:8642:42::3 1.844ms
1: 2a00:8642:42::3 1.579ms
2: gw.friends.steffann.nl 2.412ms
3: 2a00:1ca8:1::194 3.120ms
4: 2a03:3f40::10:41 3.874ms
5: 2001:978:2:40::3:1 4.662ms
6: be3458.ccr42.ams03.atlas.cogentco.com 5.810ms
7: be2950.ccr42.fra05.atlas.cogentco.com 12.054ms
8: be7944.ccr22.muc03.atlas.cogentco.com 16.906ms
9: port-channel5892.ccr92.mil02.atlas.cogentco.com 24.827ms
10: be4466.rcr51.b019138-1.mil02.atlas.cogentco.com 26.238ms
11: 2001:978:2:2a::120:2 28.393ms asymm 10
12: no reply
13: 2a0c:9a40:8e30::1 46.584ms reached
Resume: pmtu 1500 hops 13 back 12 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 | - | 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 | 8.6ms | 0% | AS204471 | KARSOLINK - 2S Computers SRL, IT |
| 4 | * | - | - | - | |
| 5 | * | - | - | - | |
| 6 | 2a0c:9a40:8e30::1 | 26.7ms | 0% | AS208229 | MICHELE-ROBERTAZZI - MICHELE ROBERTAZZI, IT |
tracepath -6
1?: [LOCALHOST] 0.034ms pmtu 1500
1: karsolink-01.net.karsolink.com 0.673ms
1: karsolink-01.net.karsolink.com 0.780ms
2: 2a12:d8c0:109f:121::a1 0.966ms
3: 2a12:d8c0:101f:103::1 9.043ms
4: no reply
5: no reply
6: 2a0c:9a40:8e30::1 27.531ms reached
Resume: pmtu 1500 hops 6 back 8 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 | 10% | 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 | 20% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 5 | * | - | - | - | |
| 6 | port-channel1.core1.zag2.he.net 2001:470:0:2ea::2 | 3.7ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 7 | * | - | - | - | |
| 8 | navigabene.minap.it 2001:7f8:c5::a504:1720:1 | 19.4ms | 0% | - | NA |
| 9 | * | - | - | - | |
| 10 | 2a0c:9a40:8e30::1 | 37.7ms | 0% | AS208229 | MICHELE-ROBERTAZZI - MICHELE ROBERTAZZI, 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] 0.028ms pmtu 1500
1: fw1-lju.6connect.com 0.564ms
1: fw1-lju.6connect.com 0.492ms
2: no reply
3: no reply
4: e0-1.core1.lju1.he.net 2.223ms
5: no reply
6: port-channel1.core1.zag2.he.net 81.294ms
7: no reply
8: navigabene-v6.mix-it.net 19.713ms asymm 13
9: no reply
10: 2a0c:9a40:8e30::1 37.657ms reached
Resume: pmtu 1500 hops 10 back 13