AS overview
Test target: 2a05:c6c0:17::221 · dns1.ivo.cloud · address space: PA · prefixes announced: 2
prefix(es): 2a02:e50::/32, 2a05:c6c0::/29
Targets & per-vantage-point probe results (3 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 | ||
2a02:e50:0:874::82dns2.ivo.cloud | NS | ✓ | ✓ | ? | ? | - | ✓ | ✓ | ? | ? | - | ✓ | ✓ | ? | ? | - |
2a05:c6c0:17:1::5dtssi.it | whois | ✓ | ✓ | open | open | - | ✓ | ✓ | open | open | - | ✓ | ✓ | open | open | - |
2a05:c6c0:17::221dns1.ivo.cloud | NS | ✓ | ✓ | ? | ? | - | ✓ | ✓ | ? | ? | - | ✓ | ✓ | ? | ? | - |
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 - Selective peering, peering member, since 2013-04-25. IPv6 LAN: 2001:7f8:b:100:1d1:a5d4:9605:127. Locations: -.
RPKI & ASPA
2 of 2 prefix(es) covered by a valid ROA.
| Prefix | RPKI state | Reason | Covering VRP(s) |
|---|---|---|---|
2a02:e50::/32 | ✓ valid | matched VRP (correct origin, length within maxLength) | AS49605 /32 maxLen 32 (ripe) |
2a05:c6c0::/29 | ✓ valid | matched VRP (correct origin, length within maxLength) | AS49605 /29 maxLen 29 (ripe) |
Random-IP probe (yarrp) into the AS' prefixes
We probed 30 arbitrary IPv6 address(es) inside AS49605's announced prefix(es). No router inside the prefix responded. The deepest visible hop was 2001:470:0:2ea::2 at hop 6 - that router answers ICMPv6 Echo. This is not in AS49605'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 2026-05-30T12:45:38Z
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 | 1.4ms | 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 | ccr2-ccr1.dc1.nogalliance.org 2a00:8642:dc1:2::b | 2.4ms | 0% | AS203993 | STEFFANN-DC-AS - S.J.M. Steffann, NL |
| 4 | 2001:7f8:1::a504:9605:1 | 22.6ms | 0% | - | NA |
| 5 | 2a02:e50:0:10::2 | 31.1ms | 0% | AS49605 | DTS-AS - Digital Telecommunication Services S.r.l., IT |
| 6 | 2a02:e50:0:10::18a | 29.2ms | 0% | AS49605 | DTS-AS - Digital Telecommunication Services S.r.l., IT |
| 7 | * | - | 0% | - | |
| 8 | * | - | - | - | |
| 9 | * | - | - | - | |
| 10 | * | - | - | - | |
| 11 | * | - | - | - | |
| 12 | * | - | - | - | |
| 13 | * | - | - | - | |
| 14 | * | - | - | - | |
| 15 | * | - | - | - | |
| 16 | * | - | - | - | |
| 17 | * | - | - | - | |
| 18 | * | - | - | - | |
| 19 | * | - | - | - | |
| 20 | * | - | - | - | |
| 21 | * | - | - | - | |
| 22 | * | - | - | - | |
| 23 | * | - | - | - | |
| 24 | * | - | - | - |
tracepath -6
1?: [LOCALHOST] 0.031ms pmtu 1500
1: 2a00:8642:42::3 1.491ms
1: 2a00:8642:42::3 1.186ms
2: gw.friends.steffann.nl 2.156ms
3: ccr2-ccr1.dc1.nogalliance.org 2.480ms asymm 2
4: 2001:7f8:1::a504:9605:1 34.823ms asymm 5
5: 2a02:e50:0:10::2 29.536ms asymm 7
6: 2a02:e50:0:10::18a 29.607ms asymm 7
7: no reply
8: no reply
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 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 | 2a12:d8c0:109f:121::a1 | 0.4ms | 0%* | AS204471 | KARSOLINK - 2S Computers SRL, IT |
| 3 | 2a12:d8c0:101f:6::1 | 10.0ms | 0% | AS204471 | KARSOLINK - 2S Computers SRL, IT |
| 4 | ivo.minap.it 2001:7f8:c5::a504:9605:1 | 10.1ms | 0% | - | NA |
| 5 | 2a02:e50:0:10::2 | 16.8ms | 0% | AS49605 | DTS-AS - Digital Telecommunication Services S.r.l., IT |
| 6 | 2a02:e50:0:10::18a | 16.7ms | 0% | AS49605 | DTS-AS - Digital Telecommunication Services S.r.l., IT |
| 7 | * | - | 0% | - | |
| 8 | * | - | - | - | |
| 9 | * | - | - | - | |
| 10 | * | - | - | - | |
| 11 | * | - | - | - | |
| 12 | * | - | - | - | |
| 13 | * | - | - | - | |
| 14 | * | - | - | - | |
| 15 | * | - | - | - | |
| 16 | * | - | - | - | |
| 17 | * | - | - | - | |
| 18 | * | - | - | - | |
| 19 | * | - | - | - | |
| 20 | * | - | - | - | |
| 21 | * | - | - | - | |
| 22 | * | - | - | - | |
| 23 | * | - | - | - | |
| 24 | * | - | - | - |
tracepath -6
1?: [LOCALHOST] 0.029ms pmtu 1500
1: karsolink-01.net.karsolink.com 0.741ms
1: karsolink-01.net.karsolink.com 0.897ms
2: no reply
3: 2a12:d8c0:101f:6::1 10.596ms
4: ivo.minap.it 12.685ms
5: 2a02:e50:0:10::2 37.341ms asymm 6
6: 2a02:e50:0:10::18a 17.387ms
7: no reply
8: no reply
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 | * | - | - | - | |
| 3 | 2a03:a100:0:201:1::1 | 0.6ms | 60% | AS56635 | XENYA - XENYA inzeniring, proizvodnja in trgovina, d.o.o. Ljubljana, SI |
| 4 | e0-1.core1.lju1.he.net 2001:470:1:5be::1 | 3.9ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 5 | * | - | - | - | |
| 6 | port-channel1.core1.zag2.he.net 2001:470:0:2ea::2 | 4.0ms | 20% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 7 | * | - | - | - | |
| 8 | ivo.minap.it 2001:7f8:c5::a504:9605:1 | 12.3ms | 0% | - | NA |
| 9 | 2a02:e50:0:10::2 | 18.6ms | 0% | AS49605 | DTS-AS - Digital Telecommunication Services S.r.l., IT |
| 10 | 2a02:e50:0:10::18a | 18.8ms | 0% | AS49605 | DTS-AS - Digital Telecommunication Services S.r.l., IT |
| 11 | * | - | 0% | - | |
| 12 | * | - | - | - | |
| 13 | * | - | - | - | |
| 14 | * | - | - | - | |
| 15 | * | - | - | - | |
| 16 | * | - | - | - | |
| 17 | * | - | - | - | |
| 18 | * | - | - | - | |
| 19 | * | - | - | - | |
| 20 | * | - | - | - | |
| 21 | * | - | - | - | |
| 22 | * | - | - | - | |
| 23 | * | - | - | - | |
| 24 | * | - | - | - |
Rate-limited ICMPv6: hop 3, hop 6 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.035ms pmtu 1500
1: fw1-lju.6connect.com 0.527ms
1: fw1-lju.6connect.com 0.517ms
2: no reply
3: 2a03:a100:0:201:1::1 0.699ms
4: e0-1.core1.lju1.he.net 1.801ms
5: no reply
6: port-channel1.core1.zag2.he.net 4.363ms
7: no reply
8: ivo.minap.it 12.474ms
9: 2a02:e50:0:10::2 19.842ms asymm 10
10: 2a02:e50:0:10::18a 19.041ms
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