AS overview
Test target: 2a13:71c0::1 · (no live host found) · address space: PA · prefixes announced: 1
prefix(es): 2a13:71c0::/29
RPKI & ASPA
0 of 1 prefix(es) covered by a valid ROA, 1 not-found.
| Prefix | RPKI state | Reason | Covering VRP(s) |
|---|---|---|---|
2a13:71c0::/29 | - not-found | no covering VRP |
Random-IP probe (yarrp) into the AS' prefixes
At least one router inside AS59429's announced prefix replied during the random-target probe. Hop(s): 2a13:71c0:ffff::1. These are candidate targets for direct testing.
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 2026-05-25T12:38:45Z
From NL host (go6lab) no ipv6 implementationRFC 4890 ✓
filter likely at: no host (announced, no deployment) · 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 | 2.2ms | 0%* | AS203993 | STEFFANN-DC-AS - S.J.M. Steffann, NL |
| 3 | 2a00:1ca8:1::194 | 2.2ms | 0% | AS50673 | Serverius-as - Serverius Holding B.V., NL |
| 4 | 2a03:3f40::10:33 | 6.6ms | 0% | AS50673 | Serverius-as - Serverius Holding B.V., NL |
| 5 | 2001:7f8:1::a501:2874:1 | 21.2ms | 0% | - | NA |
| 6 | 2001:b00:1:1:3::139 | 21.6ms | 0% | AS12874 | FASTWEB - Fastweb SpA, IT |
| 7 | 2001:b00:ffff:fc26::ebc9:2 | 34.6ms | 0% | AS12874 | FASTWEB - Fastweb SpA, IT |
| 8 | 2001:b00:ffff:fc26:93:61:53:48 | 33.4ms | 90% | AS12874 | FASTWEB - Fastweb SpA, IT |
| 9 | 2a13:71c0::1 | 34.0ms | 0% | AS59429 | POLOTEC - Polo Navacchio S.p.A., IT |
Rate-limited ICMPv6: hop 8 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.034ms pmtu 1500
1: 2a00:8642:42::3 1.597ms
1: 2a00:8642:42::3 1.569ms
2: gw.friends.steffann.nl 2.696ms
3: 2a00:1ca8:1::194 3.175ms
4: 2a03:3f40::10:33 5.682ms
5: no reply
6: 2001:b00:1:1:3::139 21.754ms
7: 2001:b00:ffff:fc26::ebc9:2 36.182ms asymm 10
8: 2001:b00:ffff:fc26:93:61:53:48 33.201ms asymm 9
9: 2a13:71c0::1 33.724ms reached
Resume: pmtu 1500 hops 9 back 10 From ITA host (Karsolink) no ipv6 implementationRFC 4890 ✓
filter likely at: no host (announced, no deployment) · min PMTU on path: 1500
Path (traceroute + mtr + PTR)
| # | IP / PTR | RTT | mtr loss | AS | AS holder |
|---|---|---|---|---|---|
| 1 | * | - | 0%* | - | |
| 2 | * | - | 0%* | - | |
| 3 | 2a12:d8c0:101f:6::1 | 10.0ms | 60% | AS204471 | KARSOLINK - 2S Computers SRL, IT |
| 4 | * | - | 60% | - | |
| 5 | 2001:b00:1:1:1::1a7 | 9.8ms | 0% | AS12874 | FASTWEB - Fastweb SpA, IT |
| 6 | 2001:b00:ffff:fc26::ebc9:2 | 29.2ms | 0% | AS12874 | FASTWEB - Fastweb SpA, IT |
| 7 | 2001:b00:ffff:fc26:93:61:53:48 | 26.2ms | 80% | AS12874 | FASTWEB - Fastweb SpA, IT |
| 8 | 2a13:71c0::1 | 21.8ms | 0% | AS59429 | POLOTEC - Polo Navacchio S.p.A., IT |
Rate-limited ICMPv6: hop 3, hop 4, hop 7 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.028ms pmtu 1500
1: karsolink-01.net.karsolink.com 0.850ms
2: 2a12:d8c0:109f:121::a1 0.835ms
3: 2a12:d8c0:101f:6::1 10.244ms
4: fastweb.minap.it 11.914ms
5: 2001:b00:1:1:1::1a7 10.116ms
6: 2001:b00:ffff:fc26::ebc9:2 26.415ms asymm 9
7: 2001:b00:ffff:fc26:93:61:53:48 25.571ms asymm 8
8: 2a13:71c0::1 23.328ms reached
Resume: pmtu 1500 hops 8 back 9 From SLO host (6connect) no ipv6 implementationRFC 4890 ✓
filter likely at: no host (announced, no deployment) · 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 | 2a03:a100:0:201:1::1 | 0.7ms | 20% | AS56635 | XENYA - XENYA inzeniring, proizvodnja in trgovina, d.o.o. Ljubljana, SI |
| 4 | 2001:7f8:46:0:1::3303 | 9.5ms | 0% | AS51988 | ARNES-SIX - ARNES, SI |
| 5 | 2001:918:100:74::1 | 8.0ms | 0% | AS3303 | SWISSCOM - Swisscom (Schweiz) AG, CH |
| 6 | * | - | 80% | - | |
| 7 | 2001:b00:1:1:3::139 | 10.4ms | 0% | AS12874 | FASTWEB - Fastweb SpA, IT |
| 8 | 2001:b00:ffff:fc26::ebc9:2 | 23.8ms | 0% | AS12874 | FASTWEB - Fastweb SpA, IT |
| 9 | 2001:b00:ffff:fc26:93:61:53:48 | 23.7ms | 80% | AS12874 | FASTWEB - Fastweb SpA, IT |
| 10 | 2a13:71c0::1 | 23.3ms | 0% | AS59429 | POLOTEC - Polo Navacchio S.p.A., IT |
Rate-limited ICMPv6: hop 3, hop 6, hop 9 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.040ms pmtu 1500
1: fw1-lju.6connect.com 0.516ms
1: fw1-lju.6connect.com 0.571ms
2: ccr-to-fw-ccr1-gw-lju.6connect.com 0.639ms
3: 2a03:a100:0:201:1::1 1.138ms
4: 2001:7f8:46:0:1::3303 8.217ms
5: 2001:918:100:74::1 7.867ms
6: 2001:4d98:a000::15d 139.381ms
7: 2001:b00:1:1:3::139 10.772ms asymm 9
8: 2001:b00:ffff:fc26::ebc9:2 23.614ms asymm 13
9: 2001:b00:ffff:fc26:93:61:53:48 24.355ms asymm 12
10: 2a13:71c0::1 23.641ms reached
Resume: pmtu 1500 hops 10 back 13