AS overview
Test target: 2a07:c700:0:1200::1 · ns1.zcom.it · address space: PA · prefixes announced: 1
prefix(es): 2a07:c700::/29
Targets & per-vantage-point probe results (6 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:c700:0:1200::1ns1.zcom.it | NS | ✓ | ✓ | ? | ? | - | ✓ | ✓ | ? | ? | - | ✓ | ✓ | ? | ? | - |
2a07:c700:0:200::1webmail.limitis.com | drv | ✓ | ✓ | open | open | - | ✓ | ✓ | open | open | - | ✓ | ✓ | open | open | - |
2a07:c700:0:800::1mail.limitis.it | drv | ✓ | ✓ | open | open | - | ✓ | ✓ | open | open | - | ✓ | ✓ | open | open | - |
2a07:c700:0:800::2mail.limitis.it | drv | ✓ | ✓ | open | open | - | ✓ | ✓ | open | open | - | ✓ | ✓ | open | open | - |
2a07:c700:0:800::3mail.limitis.it | drv | ✓ | ✓ | open | open | - | ✓ | ✓ | open | open | - | ✓ | ✓ | open | open | - |
2a07:c700:0:800::4mail.limitis.it | drv | ✓ | ✓ | open | open | - | ✓ | ✓ | open | open | - | ✓ | ✓ | open | open | - |
MIX-IT / NAMEX / MINAP / TOP-IX / VSIX / EQUINIX-MILAN / BGPX-ROME / NAMEX-BARI / PCIX / DECIX-PALERMO peering
Not an MIX-IT / NAMEX / MINAP / TOP-IX / VSIX / EQUINIX-MILAN / BGPX-ROME / NAMEX-BARI / PCIX / DECIX-PALERMO member, but our traceroute path crosses the MIX-IT / NAMEX / MINAP / TOP-IX / VSIX / EQUINIX-MILAN / BGPX-ROME / NAMEX-BARI / PCIX / DECIX-PALERMO LAN from SLO host (6connect) - reached via an MIX-IT / NAMEX / MINAP / TOP-IX / VSIX / EQUINIX-MILAN / BGPX-ROME / NAMEX-BARI / PCIX / DECIX-PALERMO-resident transit operator.
RPKI & ASPA
1 of 1 prefix(es) covered by a valid ROA.
| Prefix | RPKI state | Reason | Covering VRP(s) |
|---|---|---|---|
2a07:c700::/29 | ✓ valid | matched VRP (correct origin, length within maxLength) | AS50178 /29 maxLen 29 (ripe) |
Random-IP probe (yarrp) into the AS' prefixes
We probed 15 arbitrary IPv6 address(es) inside AS50178's announced prefix(es). No router inside the prefix responded. The deepest visible hop was fdb9:8736:30c3::1 at hop 10 - that router does not answer ICMPv6 Echo. This is not in AS50178'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 2026-05-30T12:46:21Z
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 | 1.3ms | 0% | AS203993 | STEFFANN-DC-AS - S.J.M. Steffann, NL |
| 2 | gw.friends.steffann.nl 2a00:8642:1000:f000::1 | 1.8ms | 0%* | AS203993 | STEFFANN-DC-AS - S.J.M. Steffann, NL |
| 3 | 2a00:1ca8:1::194 | 2.6ms | 0% | AS50673 | Serverius-as - Serverius Holding B.V., NL |
| 4 | 2a03:3f40::10:33 | 5.4ms | 0% | AS50673 | Serverius-as - Serverius Holding B.V., NL |
| 5 | 2001:7f8:1::a501:2874:1 | 21.7ms | 0% | - | NA |
| 6 | 2001:b00:1:1:3::133 | 20.2ms | 0% | AS12874 | FASTWEB - Fastweb SpA, IT |
| 7 | 2001:b00:1:1:3::147 | 21.4ms | 0% | AS12874 | FASTWEB - Fastweb SpA, IT |
| 8 | 2a02:2058:2:2::a | 28.1ms | 0% | AS44512 | KONVERTO-AS - KONVERTO SPA, IT |
| 9 | k.limitis.net 2a02:2058:2:2::b | 27.8ms | 0% | AS44512 | KONVERTO-AS - KONVERTO SPA, IT |
| 10 | fdb9:8736:30c3::1 | 27.5ms | 0% | - | NA |
| 11 | * | - | 0% | - | |
| 12 | * | - | - | - | |
| 13 | * | - | - | - | |
| 14 | * | - | - | - | |
| 15 | * | - | - | - | |
| 16 | * | - | - | - | |
| 17 | * | - | - | - | |
| 18 | * | - | - | - | |
| 19 | * | - | - | - | |
| 20 | * | - | - | - | |
| 21 | * | - | - | - | |
| 22 | * | - | - | - | |
| 23 | * | - | - | - | |
| 24 | * | - | - | - |
tracepath -6
1?: [LOCALHOST] 0.062ms pmtu 1500
1: 2a00:8642:42::3 1.127ms
1: 2a00:8642:42::3 1.482ms
2: gw.friends.steffann.nl 2.510ms
3: 2a00:1ca8:1::194 3.512ms
4: 2a03:3f40::10:33 6.236ms
5: 2001:7f8:1::a501:2874:1 22.855ms
6: 2001:b00:1:1:3::133 21.066ms
7: 2001:b00:1:1:3::147 21.839ms
8: 2a02:2058:2:2::a 28.995ms asymm 5
9: k.limitis.net 28.298ms asymm 6
10: fdb9:8736:30c3::1 28.307ms asymm 7
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 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 | 2a12:d8c0:109f:121::a1 | 0.4ms | 0%* | AS204471 | KARSOLINK - 2S Computers SRL, IT |
| 3 | 2a12:d8c0:101f:6::1 | 10.2ms | 40% | AS204471 | KARSOLINK - 2S Computers SRL, IT |
| 4 | fastweb.minap.it 2001:7f8:c5::a501:2874:1 | 11.2ms | 20% | AS12874 | Fastweb S.p.A. |
| 5 | 2001:b00:1:1:1::1b1 | 9.7ms | 0% | AS12874 | FASTWEB - Fastweb SpA, IT |
| 6 | 2001:b00:1:1:3::145 | 10.1ms | 0% | AS12874 | FASTWEB - Fastweb SpA, IT |
| 7 | 2a02:2058:2:2::a | 14.4ms | 0% | AS44512 | KONVERTO-AS - KONVERTO SPA, IT |
| 8 | k.limitis.net 2a02:2058:2:2::b | 14.0ms | 0% | AS44512 | KONVERTO-AS - KONVERTO SPA, IT |
| 9 | * | - | - | - | |
| 10 | * | - | 0% | - | |
| 11 | * | - | - | - | |
| 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] 0.059ms pmtu 1500
1: karsolink-01.net.karsolink.com 1.213ms
1: karsolink-01.net.karsolink.com 0.713ms
2: no reply
3: 2a12:d8c0:101f:6::1 10.454ms
4: no reply
5: 2001:b00:1:1:1::1b1 10.003ms
6: 2001:b00:1:1:3::147 10.668ms
7: 2a02:2058:2:2::a 14.786ms asymm 5
8: k.limitis.net 14.503ms asymm 6
9: no reply
10: no reply
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
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 | ccr-to-fw-ccr1-gw-lju.6connect.com 2607:fae0:a000:2::2 | 0.5ms | - | AS8038 | 6CONNECT - 6connect, Inc., US |
| 3 | 2a00:ee1:800:9::1 | 1.8ms | 40% | AS5603 | SIOL-NET - Telekom Slovenije, d.d., SI |
| 4 | 2a00:ee0:1:15::2 | 1.1ms | 0% | AS5603 | SIOL-NET - Telekom Slovenije, d.d., SI |
| 5 | 2a11:4142:2002 | 1.0ms | 0% | - | |
| 6 | 2620:107:4008:e85::2 | 8.0ms | 0% | - | NA |
| 7 | konverto-AS44512-v6.mix-it.net @MIX-IT / NAMEX / MINAP / TOP-IX / VSIX / EQUINIX-MILAN / BGPX-ROME / NAMEX-BARI / PCIX / DECIX-PALERMO 2001:7f8:b:100:1d1:a5d4:4512:108 | 10.6ms | 0% | - | NA |
| 8 | 2a02:2058:fe:2::b | 15.2ms | 0% | AS44512 | KONVERTO-AS - KONVERTO SPA, IT |
| 9 | k.limitis.net 2a02:2058:2:2::b | 14.7ms | 0% | AS44512 | KONVERTO-AS - KONVERTO SPA, IT |
| 10 | * | - | - | - | |
| 11 | * | - | 0% | - | |
| 12 | * | - | - | - | |
| 13 | * | - | - | - | |
| 14 | * | - | - | - | |
| 15 | * | - | - | - | |
| 16 | * | - | - | - | |
| 17 | * | - | - | - | |
| 18 | * | - | - | - | |
| 19 | * | - | - | - | |
| 20 | * | - | - | - | |
| 21 | * | - | - | - | |
| 22 | * | - | - | - | |
| 23 | * | - | - | - | |
| 24 | * | - | - | - |
Rate-limited ICMPv6: hop 3 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.026ms pmtu 1500
1: fw1-lju.6connect.com 0.386ms
1: fw1-lju.6connect.com 0.467ms
2: no reply
3: 2a00:ee1:800:9::1 2.119ms
4: 2a00:ee0:1:10::2 1.066ms asymm 3
5: 2a11:4142:2002:: 1.056ms asymm 6
6: 2620:107:4008:e85::2 10.229ms asymm 7
7: konverto-AS44512-v6.mix-it.net 10.885ms asymm 8
8: 2a02:2058:fe:2::b 15.032ms asymm 9
9: k.limitis.net 14.957ms asymm 10
10: no reply
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