AS overview
Test target: 2a07:73c4::1 · static prefix probe · address space: PA · prefixes announced: 2
prefix(es): 2a07:73c0::/30, 2a07:73c4::/30
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 | ||
2a07:73c4::1 | prb | ✓ | ✓ | ? | ? | - | ✓ | ✓ | ? | ? | - | ✓ | ✓ | ? | ? | - |
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 - Open peering, peering member, since 2019-10-22. IPv6 LAN: -. Locations: -.
RPKI & ASPA
2 of 2 prefix(es) covered by a valid ROA.
| Prefix | RPKI state | Reason | Covering VRP(s) |
|---|---|---|---|
2a07:73c0::/30 | ✓ valid | matched VRP (correct origin, length within maxLength) | AS49535 /30 maxLen 30 (ripe); AS49535 /29 maxLen 29 (ripe) |
2a07:73c4::/30 | ✓ valid | matched VRP (correct origin, length within maxLength) | AS49535 /30 maxLen 30 (ripe); AS49535 /29 maxLen 29 (ripe) |
Random-IP probe (yarrp) into the AS' prefixes
We probed 30 arbitrary IPv6 address(es) inside AS49535's announced prefix(es). No router inside the prefix responded. The deepest visible hop was 2001:978:2:2a::e0:2 at hop 25 - that router answers ICMPv6 Echo. This is not in AS49535'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 2026-05-30T12:46:16Z
From NL host (go6lab) openRFC 4890 ✓
filter likely at: (none) · min PMTU on path: 1500
4/4
Echo small (56B) 30.6ms
4/4
Echo 1500B (DF) 30.3ms
no
Type 1 dest-unreach
-
TCP responds on
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 | 2.0ms | 0%* | AS203993 | STEFFANN-DC-AS - S.J.M. Steffann, NL |
| 3 | 2a00:1ca8:1::194 | 1.6ms | 0% | AS50673 | Serverius-as - Serverius Holding B.V., NL |
| 4 | 2a03:3f40::10:41 | 2.1ms | 0% | AS50673 | Serverius-as - Serverius Holding B.V., NL |
| 5 | * | - | 60% | - | |
| 6 | * | - | - | - | |
| 7 | be3343.ccr41.fra05.atlas.cogentco.com 2001:550:0:1000::9a36:3e8d | 11.9ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 8 | be5516.ccr21.muc03.atlas.cogentco.com 2001:550:0:1000::9a36:3e7a | 17.4ms | - | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 9 | port-channel5891.ccr91.mil02.atlas.cogentco.com 2001:550:0:1000::9a36:3db5 | 25.7ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 10 | be5012.rcr51.b019138-1.mil02.atlas.cogentco.com 2001:550:0:1000::9a36:4bda | 26.5ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 11 | te0-0-2-1.nr14.b019138-1.mil02.atlas.cogentco.com 2001:550:0:1000::9a19:c66 | 26.2ms | 30% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 12 | * | - | 0% | - | |
| 13 | * | - | - | - | |
| 14 | * | - | - | - | |
| 15 | * | - | - | - | |
| 16 | * | - | - | - | |
| 17 | * | - | - | - | |
| 18 | * | - | - | - | |
| 19 | * | - | - | - | |
| 20 | * | - | - | - | |
| 21 | * | - | - | - | |
| 22 | * | - | - | - | |
| 23 | * | - | - | - | |
| 24 | * | - | - | - |
Rate-limited ICMPv6: hop 5, hop 11 (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 1.435ms
1: 2a00:8642:42::3 1.419ms
2: gw.friends.steffann.nl 2.406ms
3: 2a00:1ca8:1::194 3.374ms
4: 2a03:3f40::10:41 2.482ms
5: 2001:978:2:40::3:1 4.337ms
6: no reply
7: be3343.ccr41.fra05.atlas.cogentco.com 11.516ms
8: no reply
9: port-channel5891.ccr91.mil02.atlas.cogentco.com 25.444ms
10: be4466.rcr51.b019138-1.mil02.atlas.cogentco.com 25.578ms
11: te0-0-2-3.nr14.b019138-1.mil02.atlas.cogentco.com 25.919ms
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
4/4
Echo small (56B) 14.9ms
4/4
Echo 1500B (DF) 14.9ms
no
Type 1 dest-unreach
-
TCP responds on
Path (traceroute + mtr + PTR)
| # | IP / PTR | RTT | mtr loss | AS | AS holder |
|---|---|---|---|---|---|
| 1 | * | - | 0%* | - | |
| 2 | * | - | 0%* | - | |
| 3 | 2a12:d8c0:101f:6::1 | 9.9ms | 30% | AS204471 | KARSOLINK - 2S Computers SRL, IT |
| 4 | 2a03:b020:1:51::a | 10.2ms | 10% | AS41327 | FIBERTELECOM-AS - Fiber Telecom S.p.A., IT |
| 5 | 2a03:b020::246 | 10.2ms | 0% | AS41327 | FIBERTELECOM-AS - Fiber Telecom S.p.A., IT |
| 6 | 2001:978:2:2a::e7:1 | 11.0ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 7 | be4823.agr61.mil02.atlas.cogentco.com 2001:550:0:1000::9a19:8c5 | 10.9ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 8 | port-channel4690.ccr92.mil02.atlas.cogentco.com 2001:550:0:1000::9a36:3f3e | 10.3ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 9 | be5012.rcr51.b019138-1.mil02.atlas.cogentco.com 2001:550:0:1000::9a36:4bda | 11.7ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 10 | te0-0-2-3.nr14.b019138-1.mil02.atlas.cogentco.com 2001:550:0:1000::9a19:c6a | 11.4ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 11 | * | - | 0% | - | |
| 12 | * | - | - | - | |
| 13 | * | - | - | - | |
| 14 | * | - | - | - | |
| 15 | * | - | - | - | |
| 16 | * | - | - | - | |
| 17 | * | - | - | - | |
| 18 | * | - | - | - | |
| 19 | * | - | - | - | |
| 20 | * | - | - | - | |
| 21 | * | - | - | - | |
| 22 | * | - | - | - | |
| 23 | * | - | - | - | |
| 24 | * | - | - | - |
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] 0.029ms pmtu 1500
1: karsolink-01.net.karsolink.com 0.742ms
1: karsolink-01.net.karsolink.com 0.800ms
2: 2a12:d8c0:109f:121::a1 0.802ms
3: 2a12:d8c0:101f:6::1 10.438ms
4: 2a03:b020:1:51::a 10.790ms
5: 2a03:b020::246 13.390ms asymm 6
6: 2001:978:2:2a::e7:1 11.364ms asymm 7
7: be4823.agr61.mil02.atlas.cogentco.com 11.549ms asymm 8
8: port-channel4690.ccr92.mil02.atlas.cogentco.com 10.911ms asymm 9
9: be4466.rcr51.b019138-1.mil02.atlas.cogentco.com 12.067ms asymm 10
10: te0-0-2-3.nr14.b019138-1.mil02.atlas.cogentco.com 11.788ms 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 SLO host (6connect) openRFC 4890 ✓
filter likely at: (none) · min PMTU on path: 1500
4/4
Echo small (56B) 178.9ms
4/4
Echo 1500B (DF) 179.0ms
no
Type 1 dest-unreach
-
TCP responds on
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 | * | - | 0% | - | |
| 4 | 2a00:ee0:1:15::2 | 1.1ms | 0% | AS5603 | SIOL-NET - Telekom Slovenije, d.d., SI |
| 5 | 2001:41a8:20:2::169 | 8.9ms | 0% | AS6762 | SEABONE-NET - TELECOM ITALIA SPARKLE S.p.A., IT |
| 6 | loa1-loop0-v6.loa.seabone.net 2001:41a8:4070::1 | 166.2ms | 0% | AS6762 | SEABONE-NET - TELECOM ITALIA SPARKLE S.p.A., IT |
| 7 | be3082.ccr41.lax04.atlas.cogentco.com 2001:550:3::1b5 | 175.1ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 8 | * | - | 90% | - | |
| 9 | be2931.ccr31.phx01.atlas.cogentco.com 2001:550:0:1000::9a36:2c55 | 187.7ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 10 | be5473.ccr22.elp02.atlas.cogentco.com 2001:550:0:1000::9a36:a645 | 167.7ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 11 | be3846.ccr32.dfw01.atlas.cogentco.com 2001:550:0:1000::9a36:a51d | 164.7ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 12 | be5384.ccr32.oma02.atlas.cogentco.com 2001:550:0:1000::9a36:1f5e | 174.0ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 13 | be5068.ccr42.ord01.atlas.cogentco.com 2001:550:0:1000::9a36:a64a | 171.0ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 14 | port-channel2717.ccr91.cle04.atlas.cogentco.com 2001:550:0:1000::9a36:6de | 162.3ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 15 | be2994.ccr32.yyz02.atlas.cogentco.com 2001:550:0:1000::9a36:1fea | 171.2ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 16 | be3260.ccr22.ymq01.atlas.cogentco.com 2001:550:0:1000::9a36:2a5a | 174.7ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 17 | be3043.ccr22.lpl01.atlas.cogentco.com 2001:550:0:1000::9a36:2ca5 | 180.7ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 18 | port-channel8665.ccr91.lhr01.atlas.cogentco.com 2001:550:0:1000::9a36:4ada | 177.4ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 19 | be2732.ccr42.par01.atlas.cogentco.com 2001:550:0:1000::9a36:4b89 | 181.2ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 20 | * | - | 70% | - | |
| 21 | port-channel5890.ccr91.mil02.atlas.cogentco.com 2001:550:0:1000::9a36:3da5 | 175.3ms | 80% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 22 | be5012.rcr51.b019138-1.mil02.atlas.cogentco.com 2001:550:0:1000::9a36:4bda | 190.0ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 23 | te0-0-2-1.nr14.b019138-1.mil02.atlas.cogentco.com 2001:550:0:1000::9a19:c66 | 190.7ms | 10% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 24 | * | - | 0% | - |
Rate-limited ICMPv6: hop 8, hop 20, hop 21, hop 23 (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 0.557ms
1: fw1-lju.6connect.com 0.470ms
2: no reply
3: no reply
4: 2a00:ee0:1:10::2 1.951ms asymm 3
5: 2001:41a8:20:2::169 9.471ms asymm 6
6: loa1-loop0-v6.loa.seabone.net 166.243ms asymm 7
7: be3082.ccr41.lax04.atlas.cogentco.com 174.939ms
8: no reply
9: be2932.ccr32.phx01.atlas.cogentco.com 186.831ms asymm 8
10: be5471.ccr21.elp02.atlas.cogentco.com 178.228ms asymm 9
11: be3821.ccr31.dfw01.atlas.cogentco.com 170.708ms asymm 8
12: be5384.ccr32.oma02.atlas.cogentco.com 172.260ms asymm 9
13: be5214.ccr41.ord01.atlas.cogentco.com 168.886ms asymm 9
14: port-channel2717.ccr91.cle04.atlas.cogentco.com 162.510ms asymm 10
15: be2993.ccr31.yyz02.atlas.cogentco.com 177.370ms asymm 8
16: be3259.ccr21.ymq01.atlas.cogentco.com 176.205ms asymm 8
17: be3042.ccr21.lpl01.atlas.cogentco.com 171.596ms asymm 8
18: port-channel8665.ccr91.lhr01.atlas.cogentco.com 177.602ms asymm 10
19: be8670.ccr41.par01.atlas.cogentco.com 181.627ms asymm 9
20: no reply
21: port-channel5889.ccr92.mil02.atlas.cogentco.com 184.465ms asymm 8
22: be5012.rcr51.b019138-1.mil02.atlas.cogentco.com 180.580ms asymm 9
23: te0-0-2-1.nr14.b019138-1.mil02.atlas.cogentco.com 180.774ms asymm 11
24: no reply
Too many hops: pmtu 1500
Resume: pmtu 1500