AS overview
Test target: 2a09:840::2 · static prefix probe · address space: PA · prefixes announced: 1
prefix(es): 2a09:840::/32
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 | ||
2a09:840::2 | prb | ✓ | ✓ | ? | ? | ✓ | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | ✓ |
MIX-IT / NAMEX / MINAP / TOP-IX / VSIX / EQUINIX-MILAN / BGPX-ROME / NAMEX-BARI / PCIX / DECIX-PALERMO peering
Not an MIX-IT / NAMEX / MINAP / TOP-IX / VSIX / EQUINIX-MILAN / BGPX-ROME / NAMEX-BARI / PCIX / DECIX-PALERMO member, but our traceroute path crosses the MIX-IT / NAMEX / MINAP / TOP-IX / VSIX / EQUINIX-MILAN / BGPX-ROME / NAMEX-BARI / PCIX / DECIX-PALERMO LAN from ITA host (Karsolink), SLO host (6connect) - reached via an MIX-IT / NAMEX / MINAP / TOP-IX / VSIX / EQUINIX-MILAN / BGPX-ROME / NAMEX-BARI / PCIX / DECIX-PALERMO-resident transit operator.
RPKI & ASPA
1 of 1 prefix(es) covered by a valid ROA.
| Prefix | RPKI state | Reason | Covering VRP(s) |
|---|---|---|---|
2a09:840::/32 | ✓ valid | matched VRP (correct origin, length within maxLength) | AS203201 /32 maxLen 32 (ripe); AS209634 /32 maxLen 32 (ripe) |
Random-IP probe (yarrp) into the AS' prefixes
We probed 15 arbitrary IPv6 address(es) inside AS209634's announced prefix(es). No router inside the prefix responded. The deepest visible hop was 2a07:2e80:0:307::2 at hop 16 - that router answers ICMPv6 Echo. This is not in AS209634'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 2026-05-30T12:46:37Z
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 | * | - | 0%* | - | |
| 3 | 2a00:1ca8:1::194 | 2.9ms | 10% | AS50673 | Serverius-as - Serverius Holding B.V., NL |
| 4 | 2a03:3f40::10:41 | 2.7ms | 0% | AS50673 | Serverius-as - Serverius Holding B.V., NL |
| 5 | * | - | 50% | - | |
| 6 | * | - | 90% | - | |
| 7 | 2001:978:3::ca | 3.7ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 8 | 2001:2034:a:77 | 4.2ms | 0% | - | |
| 9 | * | - | - | - | |
| 10 | mno-b8-link.ip.twelve99.net 2001:2034:a:1d3::1 | 27.7ms | 0% | AS1299 | TWELVE99 - Arelion Sweden AB, SE |
| 11 | 2a09:840::2 | 26.9ms | 0% | AS209634 | ExplorerServizi - Explorer Servizi S.R.L, IT |
Rate-limited ICMPv6: hop 3, hop 5, hop 6 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.043ms pmtu 1500
1: 2a00:8642:42::3 1.573ms
1: 2a00:8642:42::3 1.355ms
2: gw.friends.steffann.nl 2.740ms
3: 2a00:1ca8:1::194 2.736ms
4: 2a03:3f40::10:41 3.155ms
5: 2001:978:2:40::3:1 4.813ms
6: no reply
7: 2001:978:3::ca 4.577ms asymm 6
8: adm-bb2-link.ip.twelve99.net 3.872ms asymm 7
9: no reply
10: mno-b8-link.ip.twelve99.net 29.398ms asymm 9
11: 2a09:840::2 30.882ms reached
Resume: pmtu 1500 hops 11 back 13 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 | * | - | 0%* | - | |
| 2 | 2a12:d8c0:109f:121::a1 | 0.4ms | 0%* | AS204471 | KARSOLINK - 2S Computers SRL, IT |
| 3 | 2a12:d8c0:101f:103::1 | 8.5ms | 10% | AS204471 | KARSOLINK - 2S Computers SRL, IT |
| 4 | supernap-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:a520:3201:218 | 9.4ms | 0% | - | NA |
| 5 | 2a07:2e80:0:307::2 | 8.9ms | 0% | AS203201 | IT-SUPERNAP - INFRASTRUCTURE ITALIA COLO S.R.L., IT |
| 6 | 2a09:840::2 | 8.9ms | 10% | AS209634 | ExplorerServizi - Explorer Servizi S.R.L, IT |
Rate-limited ICMPv6: hop 3, hop 6 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.028ms pmtu 1500
1: no reply
2: 2a12:d8c0:109f:121::a1 1.157ms
3: 2a12:d8c0:101f:103::1 8.936ms
4: supernap-v6.mix-it.net 10.454ms
5: 2a07:2e80:0:307::2 9.441ms
6: 2a09:840::2 9.645ms 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 | 0.2ms | 0%* | AS8038 | 6CONNECT - 6connect, Inc., US |
| 2 | * | - | 0%* | - | |
| 3 | 2a03:a100:0:201:1::1 | 0.7ms | 70% | AS56635 | XENYA - XENYA inzeniring, proizvodnja in trgovina, d.o.o. Ljubljana, SI |
| 4 | e0-1.core1.lju1.he.net 2001:470:1:5be::1 | 1.7ms | 70% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 5 | * | - | - | - | |
| 6 | port-channel1.core1.zag2.he.net 2001:470:0:2ea::2 | 4.0ms | 10% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 7 | * | - | - | - | |
| 8 | supernap-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:a520:3201:218 | 11.0ms | 0% | - | NA |
| 9 | 2a07:2e80:0:307::2 | 10.6ms | 0% | AS203201 | IT-SUPERNAP - INFRASTRUCTURE ITALIA COLO S.R.L., IT |
| 10 | 2a09:840::2 | 10.6ms | 0% | AS209634 | ExplorerServizi - Explorer Servizi S.R.L, IT |
Rate-limited ICMPv6: hop 3, hop 4, hop 6 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.032ms pmtu 1500
1: fw1-lju.6connect.com 0.614ms
1: fw1-lju.6connect.com 0.619ms
2: ccr-to-fw-ccr1-gw-lju.6connect.com 0.741ms
3: 2a03:a100:0:201:1::1 0.859ms
4: e0-1.core1.lju1.he.net 2.336ms
5: no reply
6: port-channel1.core1.zag2.he.net 5.936ms
7: no reply
8: supernap-v6.mix-it.net 11.474ms asymm 7
9: 2a07:2e80:0:307::2 10.995ms asymm 7
10: 2a09:840::2 10.757ms reached
Resume: pmtu 1500 hops 10 back 9