AS overview
Test target: 2a06:52c0:1::1 · static prefix probe · address space: PA · prefixes announced: 2
prefix(es): 2a06:52c0:1::/48, 2a06:52c0:2::/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 | ||
2a06:52c0:1::1 | prb | ✓ | ✓ | open | open | ✓ | ✓ | ✗ | open | open | ✓ | ✓ | ✗ | open | open | ✓ |
RPKI & ASPA
0 of 2 prefix(es) covered by a valid ROA, 2 not-found.
| Prefix | RPKI state | Reason | Covering VRP(s) |
|---|---|---|---|
2a06:52c0:1::/48 | - not-found | no covering VRP | |
2a06:52c0:2::/48 | - not-found | no covering VRP |
Random-IP probe (yarrp) into the AS' prefixes
We probed 30 arbitrary IPv6 address(es) inside AS201483's announced prefix(es). No router inside the prefix responded. The deepest visible hop was 2001:470:12:1dc::2 at hop 17 - that router answers ICMPv6 Echo. This is not in AS201483'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 2026-05-30T12:45:43Z
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 | 1.0ms | 0% | AS203993 | STEFFANN-DC-AS - S.J.M. Steffann, NL |
| 2 | * | - | 0%* | - | |
| 3 | speed-ix.fibertelecom.it 2001:7f8:b7::a504:1327:1 | 3.6ms | 0% | - | NA |
| 4 | 2a03:b020::247 | 19.6ms | 0% | AS41327 | FIBERTELECOM-AS - Fiber Telecom S.p.A., IT |
| 5 | 2a06:52c0:1::1 | 19.2ms | 0% | AS201483 | BLSIT-AS - B.L.S. Consulting S.r.l., IT |
tracepath -6
1?: [LOCALHOST] 0.049ms pmtu 1500
1: 2a00:8642:42::3 1.937ms
1: 2a00:8642:42::3 2.036ms
2: gw.friends.steffann.nl 2.549ms
3: speed-ix.fibertelecom.it 4.388ms
4: 2a03:b020::247 20.332ms
5: 2a06:52c0:1::1 20.070ms reached
Resume: pmtu 1500 hops 5 back 5 From ITA host (Karsolink) echo onlyRFC 4890 ✓
filter likely at: destination AS201483 (BLSIT-AS) · min PMTU on path: 1480
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 | * | - | 80% | - | |
| 4 | * | - | - | - | |
| 5 | * | - | - | - | |
| 6 | * | - | - | - | |
| 7 | e0-36.core2.dus1.he.net 2001:470:0:52e::2 | 32.7ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 8 | tserv2.dus1.he.net 2001:470:0:3b2::2 | 23.3ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 9 | tunnel578905-pt.tunnel.tserv18.dus1.ipv6.he.net 2001:470:12:1d4::2 | 47.8ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 10 | 2a06:52c0:1::1 | 25.9ms | 0% | AS201483 | BLSIT-AS - B.L.S. Consulting S.r.l., IT |
Rate-limited ICMPv6: hop 3 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.038ms pmtu 1500
1: karsolink-01.net.karsolink.com 0.862ms
1: karsolink-01.net.karsolink.com 0.665ms
2: 2a12:d8c0:109f:121::a1 0.903ms
3: 2a12:d8c0:101f:6::1 10.493ms
4: no reply
5: no reply
6: no reply
7: e0-36.core2.dus1.he.net 24.110ms
8: tserv2.dus1.he.net 23.840ms
9: tserv2.dus1.he.net 23.830ms pmtu 1480
9: tunnel578905-pt.tunnel.tserv18.dus1.ipv6.he.net 47.189ms
10: 2a06:52c0:1::1 27.747ms reached
Resume: pmtu 1480 hops 10 back 6 From SLO host (6connect) echo onlyRFC 4890 ✓
filter likely at: destination AS201483 (BLSIT-AS) · min PMTU on path: 1480
Path (traceroute + mtr + PTR)
| # | IP / PTR | RTT | mtr loss | AS | AS holder |
|---|---|---|---|---|---|
| 1 | fw1-lju.6connect.com 2607:fae0:a000::2 | 0.6ms | 0%* | AS8038 | 6CONNECT - 6connect, Inc., US |
| 2 | ccr-to-fw-ccr1-gw-lju.6connect.com 2607:fae0:a000:2::2 | 0.7ms | 0%* | AS8038 | 6CONNECT - 6connect, Inc., US |
| 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 | 1.8ms | 10% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 5 | 100ge0-0-0-5.core1.vie1.he.net 2001:470:0:578::1 | 8.8ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 6 | 100ge0-0-0-19.core2.fra2.he.net 2001:470:0:7ef::1 | 19.5ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 7 | be3.core4.fra1.he.net 2001:470:e:5a::2 | 18.2ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 8 | * | - | - | - | |
| 9 | e0-36.core2.dus1.he.net 2001:470:0:52e::2 | 21.4ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 10 | tserv2.dus1.he.net 2001:470:0:3b2::2 | 20.2ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 11 | tunnel578905-pt.tunnel.tserv18.dus1.ipv6.he.net 2001:470:12:1d4::2 | 45.1ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 12 | 2a06:52c0:1::1 | 32.7ms | 0% | AS201483 | BLSIT-AS - B.L.S. Consulting S.r.l., 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 0.442ms
1: fw1-lju.6connect.com 0.567ms
2: ccr-to-fw-ccr1-gw-lju.6connect.com 0.727ms
3: 2a03:a100:0:201:1::1 0.632ms
4: e0-1.core1.lju1.he.net 2.061ms
5: 100ge0-0-0-5.core1.vie1.he.net 7.990ms
6: 100ge0-0-0-19.core2.fra2.he.net 18.435ms asymm 7
7: be3.core4.fra1.he.net 18.428ms asymm 8
8: no reply
9: e0-36.core2.dus1.he.net 21.833ms
10: tserv2.dus1.he.net 20.847ms asymm 11
11: tserv2.dus1.he.net 20.489ms pmtu 1480
11: tunnel578905-pt.tunnel.tserv18.dus1.ipv6.he.net 45.655ms
12: 2a06:52c0:1::1 34.154ms reached
Resume: pmtu 1480 hops 12 back 12