AS overview
Test target: 2a0a:1301::1 · static prefix probe · address space: PA · prefixes announced: 2
prefix(es): 2a0a:1301::/32, 2a0a:1300::/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 | ||
2a0a:1301::1 | prb | ✓ | ✓ | ? | ? | ✓ | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | ✓ |
RPKI & ASPA
0 of 2 prefix(es) covered by a valid ROA, 2 not-found.
| Prefix | RPKI state | Reason | Covering VRP(s) |
|---|---|---|---|
2a0a:1301::/32 | - not-found | no covering VRP | |
2a0a:1300::/32 | - not-found | no covering VRP |
Random-IP probe (yarrp) into the AS' prefixes
We probed 30 arbitrary IPv6 address(es) inside AS207028's announced prefix(es). No router inside the prefix responded. The deepest visible hop was 2001:1418:8:1::192 at hop 13 - that router answers ICMPv6 Echo. This is not in AS207028'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 2026-05-30T12:46:39Z
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 | 1.1ms | 0% | AS203993 | STEFFANN-DC-AS - S.J.M. Steffann, NL |
| 2 | gw.friends.steffann.nl 2a00:8642:1000:f000::1 | 1.9ms | 0%* | AS203993 | STEFFANN-DC-AS - S.J.M. Steffann, NL |
| 3 | ccr2-ccr1.dc1.nogalliance.org 2a00:8642:dc1:2::b | 2.0ms | 0% | AS203993 | STEFFANN-DC-AS - S.J.M. Steffann, NL |
| 4 | ams-ix.ipv6.itgate.net 2001:7f8:1::a501:2779:1 | 3.9ms | 0% | - | NA |
| 5 | if-0-2-0-1.Muttley-Monster.TRN.ipv6.itgate.net 2001:1418:1::10e2 | 20.6ms | 0% | AS12779 | ITGATE - IT.Gate S.p.A., IT |
| 6 | 2a0a:1301::1 | 20.7ms | 0% | AS207028 | SFSC - ASSOCIAZIONE DI PROMOZIONE SOCIALE SENZA FILI SENZA CONFINI, IT |
tracepath -6
1?: [LOCALHOST] 0.031ms pmtu 1500
1: 2a00:8642:42::3 1.348ms
1: 2a00:8642:42::3 1.403ms
2: gw.friends.steffann.nl 2.477ms
3: ccr2-ccr1.dc1.nogalliance.org 2.525ms asymm 2
4: ams-ix.ipv6.itgate.net 5.290ms asymm 3
5: if-0-2-0-1.Muttley-Monster.TRN.ipv6.itgate.net 21.963ms
6: 2a0a:1301::1 21.598ms reached
Resume: pmtu 1500 hops 6 back 6 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 | karsolink-01.net.karsolink.com 2a12:d8c0:105a:9001::1 | 0.3ms | 0%* | AS204471 | KARSOLINK - 2S Computers SRL, IT |
| 2 | * | - | 0%* | - | |
| 3 | 2a12:d8c0:101f:6::1 | 10.0ms | 30% | AS204471 | KARSOLINK - 2S Computers SRL, IT |
| 4 | itgate.minap.it 2001:7f8:c5::a501:2779:1 | 10.7ms | 0% | AS12779 | ITgate S.p.A. |
| 5 | if-0-2-0-1.Muttley-Monster.TRN.ipv6.itgate.net 2001:1418:1::10e2 | 12.5ms | 0% | AS12779 | ITGATE - IT.Gate S.p.A., IT |
| 6 | 2a0a:1301::1 | 12.0ms | 0% | AS207028 | SFSC - ASSOCIAZIONE DI PROMOZIONE SOCIALE SENZA FILI SENZA CONFINI, IT |
Rate-limited ICMPv6: hop 3 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.031ms pmtu 1500
1: no reply
2: 2a12:d8c0:109f:121::a1 1.022ms
3: 2a12:d8c0:101f:6::1 10.409ms
4: itgate.minap.it 11.330ms
5: no reply
6: 2a0a:1301::1 12.640ms 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 | 0.3ms | 0%* | AS8038 | 6CONNECT - 6connect, Inc., US |
| 2 | * | - | - | - | |
| 3 | 2a00:ee1:800:9::1 | 1.9ms | 60% | AS5603 | SIOL-NET - Telekom Slovenije, d.d., SI |
| 4 | 2a00:ee0:1:10::2 | 1.0ms | 0% | AS5603 | SIOL-NET - Telekom Slovenije, d.d., SI |
| 5 | de-cix.fra.ipv6.itgate.net 2001:7f8::31eb:0:1 | 15.0ms | 0% | - | NA |
| 6 | if-0-2-0-1.Muttley-Monster.TRN.ipv6.itgate.net 2001:1418:1::10e2 | 18.2ms | 0% | AS12779 | ITGATE - IT.Gate S.p.A., IT |
| 7 | 2a0a:1301::1 | 18.0ms | 0% | AS207028 | SFSC - ASSOCIAZIONE DI PROMOZIONE SOCIALE SENZA FILI SENZA CONFINI, IT |
Rate-limited ICMPv6: hop 3 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.029ms pmtu 1500
1: fw1-lju.6connect.com 0.554ms
1: fw1-lju.6connect.com 0.478ms
2: no reply
3: 2a00:ee1:800:9::1 2.760ms
4: 2a00:ee0:1:15::2 1.161ms asymm 3
5: de-cix.fra.ipv6.itgate.net 15.101ms asymm 9
6: if-0-2-0-1.Muttley-Monster.TRN.ipv6.itgate.net 18.312ms asymm 9
7: 2a0a:1301::1 18.366ms reached
Resume: pmtu 1500 hops 7 back 10