AS overview
Test target: 2a07:1ec0:829::a5 · dns.topix.it · address space: mixed · prefixes announced: 1
prefix(es): 2a07:1ec0::/29
Targets & per-vantage-point probe results (4 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 | ||
2a07:1ec0:829::a20top-ix.org | whois | ✓ | ✓ | open | open | ✓ | ✓ | ✓ | open | open | ✓ | ✓ | ✓ | open | open | ✓ |
2a07:1ec0:829::a5dns.topix.it | NS | ✓ | ✓ | ? | ? | ✓ | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | ✓ |
2a07:1ec0:829::a6dns1.topix.it | NS | ✓ | ✓ | ? | ? | ✓ | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | ✓ |
2a07:1ec0:829::a7dns2.topix.it | NS | ✓ | ✓ | ? | ? | ✓ | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | ✓ |
RPKI & ASPA
1 of 1 prefix(es) covered by a valid ROA.
| Prefix | RPKI state | Reason | Covering VRP(s) |
|---|---|---|---|
2a07:1ec0::/29 | ✓ valid | matched VRP (correct origin, length within maxLength) | AS41364 /29 maxLen 29 (ripe) |
Random-IP probe (yarrp) into the AS' prefixes
We probed 15 arbitrary IPv6 address(es) inside AS41364'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 AS41364'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 2026-05-30T12:46:04Z
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 | 0.7ms | 0% | AS203993 | STEFFANN-DC-AS - S.J.M. Steffann, NL |
| 2 | gw.friends.steffann.nl 2a00:8642:1000:f000::1 | 1.4ms | 0%* | AS203993 | STEFFANN-DC-AS - S.J.M. Steffann, NL |
| 3 | 2a00:1ca8:1::194 | 2.1ms | 0% | AS50673 | Serverius-as - Serverius Holding B.V., NL |
| 4 | 2a03:3f40::10:33 | 5.0ms | 0% | AS50673 | Serverius-as - Serverius Holding B.V., NL |
| 5 | ams-ix.ipv6.itgate.net 2001:7f8:1::a501:2779:1 | 4.6ms | 0% | - | NA |
| 6 | if-0-2-0-1.Muttley-Monster.TRN.ipv6.itgate.net 2001:1418:1::10e2 | 21.5ms | 0% | AS12779 | ITGATE - IT.Gate S.p.A., IT |
| 7 | * | - | - | - | |
| 8 | 2a07:1ec0:829::a5 | 26.8ms | 0% | AS41364 | TOP-IX_DP - CONSORZIO TOPIX - TORINO E PIEMONTE EXCHANGE POINT, IT |
tracepath -6
1?: [LOCALHOST] 0.038ms pmtu 1500
1: 2a00:8642:42::3 1.542ms
1: 2a00:8642:42::3 1.327ms
2: no reply
3: 2a00:1ca8:1::194 4.017ms
4: 2a03:3f40::10:33 4.983ms
5: ams-ix.ipv6.itgate.net 5.411ms asymm 3
6: if-0-2-0-1.Muttley-Monster.TRN.ipv6.itgate.net 22.836ms asymm 5
7: no reply
8: 2a07:1ec0:829::a5 27.506ms 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 | * | - | 0%* | - | |
| 2 | * | - | 0%* | - | |
| 3 | 2a12:d8c0:109f:106::a2 | 3.2ms | 10% | AS204471 | KARSOLINK - 2S Computers SRL, IT |
| 4 | 2001:7f8:5f:ffff::33 | 11.1ms | 20% | - | NA |
| 5 | 2a07:1ec0:829::a5 | 10.5ms | 0% | AS41364 | TOP-IX_DP - CONSORZIO TOPIX - TORINO E PIEMONTE EXCHANGE POINT, 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] 0.031ms pmtu 1500
1: no reply
2: 2a12:d8c0:109f:121::a1 0.984ms
3: 2a12:d8c0:109f:106::a2 3.782ms
4: 2001:7f8:5f:ffff::33 11.779ms asymm 6
5: 2a07:1ec0:829::a5 11.485ms reached
Resume: pmtu 1500 hops 5 back 7 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 | * | - | 0%* | - | |
| 3 | * | - | 30% | - | |
| 4 | e0-1.core1.lju1.he.net 2001:470:1:5be::1 | 2.1ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 5 | * | - | - | - | |
| 6 | port-channel1.core1.zag2.he.net 2001:470:0:2ea::2 | 3.6ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 7 | * | - | - | - | |
| 8 | * | - | - | - | |
| 9 | 2a07:1ec0:829::a5 | 15.0ms | 0% | AS41364 | TOP-IX_DP - CONSORZIO TOPIX - TORINO E PIEMONTE EXCHANGE POINT, IT |
Rate-limited ICMPv6: hop 3 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.018ms pmtu 1500
1: fw1-lju.6connect.com 0.576ms
1: fw1-lju.6connect.com 0.491ms
2: ccr-to-fw-ccr1-gw-lju.6connect.com 0.897ms
3: no reply
4: e0-1.core1.lju1.he.net 2.368ms
5: no reply
6: port-channel1.core1.zag2.he.net 4.309ms
7: no reply
8: no reply
9: 2a07:1ec0:829::a5 15.029ms reached
Resume: pmtu 1500 hops 9 back 9