AS overview
Test target: 2a02:20d8:20d8:2a02:: · dns2.lepida.it · address space: mixed · prefixes announced: 2
prefix(es): 2001:678:1158::/48, 2a02:20d8::/29
Targets & per-vantage-point probe results (2 target(s) across 7 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 | SRB host (SOX, Belgrade) | DE host (Berlin) | DE host (Düsseldorf) | NL host (go6lab) | ITA host (Karsolink) | SLO host (6connect) | SLO host (T-2) | ||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ping | 1500B | :80 | :443 | reached | ping | 1500B | :80 | :443 | reached | ping | 1500B | :80 | :443 | reached | ping | 1500B | :80 | :443 | reached | ping | 1500B | :80 | :443 | reached | ping | 1500B | :80 | :443 | reached | ping | 1500B | :80 | :443 | reached | ||
2a02:20d8:20d8:2a02::dns2.lepida.it | NS | ✓ | ✓ | refused | refused | - | ✓ | ✓ | refused | refused | - | ✓ | ✓ | refused | refused | - | ✓ | ✓ | ? | ? | - | ✓ | ✓ | refused | refused | - | ✓ | ✓ | refused | refused | - | ✓ | ✓ | refused | refused | - |
2a02:20d8::1ipv6.lepida.it | drv | ✓ | ✓ | ? | ? | - | ✓ | ✓ | ? | ? | - | ✓ | ✓ | ? | ? | - | ✓ | ✓ | ? | ? | - | ✓ | ✗ | ? | ? | - | ✓ | ✓ | ? | ? | - | ✓ | ✓ | ? | ? | - |
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 - Open peering, peering member, since 2013-05-03. IPv6 LAN: 2001:7f8:b:100:1d1:a5d3:1638:129. Locations: -.
RPKI & ASPA
1 of 2 prefix(es) covered by a valid ROA, 1 not-found.
| Prefix | RPKI state | Reason | Covering VRP(s) |
|---|---|---|---|
2001:678:1158::/48 | - not-found | no covering VRP | |
2a02:20d8::/29 | ✓ valid | matched VRP (correct origin, length within maxLength) | AS31638 /29 maxLen 32 (ripe) |
Random-IP probe (yarrp) into the AS' prefixes
At least one router inside AS31638's announced prefix replied during the random-target probe. Hop(s): 2001:678:1158::1, 2a02:20d8::1e, 2a02:20d8::22. 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 2026-09-23T12:02:26Z
Multi-vantage path map
Every hop of all vantages’ traceroutes toward the target, drawn left→right, grouped into per-AS bubbles (a hop seen from several vantages is one shared bubble, so converging paths merge). It answers two questions per vantage — shown on each source bubble as echo ✓/⚠/✗ · trace ✓/✗: did the destination reply to ICMPv6 Echo (✓ honored, ⚠ replied but PTB not honored, ✗ no reply), and did the traceroute reach it. A line to the target is drawn only when that vantage got an echo reply — solid if the PTB was honored, dashed if not (reachable but a broken-PMTUD / RFC 4890 violation). The path depth still shows how far the traceroute itself got, and runs of unanswered (* *) hops collapse into one dashed “silent” bubble. Open full size ↗
- ● SRB host (SOX, Belgrade)
- ● DE host (Berlin)
- ● DE host (Düsseldorf)
- ● NL host (go6lab)
- ● ITA host (Karsolink)
- ● SLO host (6connect)
- ● SLO host (T-2)
- ── solid line = echo reply, PTB honored (clean reach)
- — — dashed line = echo reply but PTB not honored (RFC 4890 violation)
- no line = no echo reply (never reached)
- ◉ target: green = clean, amber = reachable-but-violation / unreachable
- ⚠ suspected drop AS
- ⋯ silent (unanswered) hops
- ● IXP hop
From SRB host (SOX, Belgrade) openRFC 4890 ✓
filter likely at: (none) · min PMTU on path: 1500
Path (traceroute + mtr + PTR)
| # | IP / PTR | RTT | mtr loss | AS | AS holder |
|---|---|---|---|---|---|
| 1 | 2a09:ab81::1 | 0.3ms | 0%* | AS60733 | PERKE-NET - ZORAN PEROVIC trading as Agencija Perke.NET, RS |
| 2 | sox-pn.sox.rs 2001:7f8:1e:8::3a | 0.4ms | 0% | AS13004 | SOX - Serbian Open Exchange DOO, RS |
| 3 | 2001:7f8:1e:8::3d | 0.4ms | 0% | AS13004 | SOX - Serbian Open Exchange DOO, RS |
| 4 | 2a02:2d8:0:a00e:232a | 12.7ms | 20% | - | |
| 5 | 2a02:2d8::57f5:e05f | 22.2ms | 0% | AS9002 | RETN-AS - RETN Limited, GB |
| 6 | GW-AS31638.retn.net 2a02:2d8:4:d002:232a::1 | 29.3ms | 0% | AS9002 | RETN-AS - RETN Limited, GB |
| 7 | 2a02:20d8::1e | 29.4ms | 0% | AS31638 | ASN-LEPIDA - Lepida S.c.p.A., IT |
| 8 | felix.lepida.it 2a02:20d8::9 | 31.9ms | 0% | AS31638 | ASN-LEPIDA - Lepida S.c.p.A., IT |
| 9 | 2a02:20d8:20d8:2a02 | 31.2ms | 0% | - |
Rate-limited ICMPv6: hop 4 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.009ms pmtu 1500
1: _gateway 0.950ms
1: _gateway 0.670ms
2: sox-pn.sox.rs 0.635ms
3: 2001:7f8:1e:8::3d 0.702ms asymm 2
4: ae8-930.RT.IRX.VIE.AT.retn.net 12.962ms asymm 3
5: 2a02:2d8::57f5:e05f 22.809ms asymm 4
6: GW-AS31638.retn.net 29.663ms asymm 5
7: 2a02:20d8::1e 29.824ms asymm 6
8: felix.lepida.it 31.839ms asymm 7
9: 2a02:20d8:20d8:2a02:: 31.374ms reached
Resume: pmtu 1500 hops 9 back 8 From DE host (Berlin) 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 | ae0-2453.cr10.ber01.lwlcom.net 2a06:d1c0::dead:beef:1c02 | 0.7ms | 0%* | AS59645 | WYBT-NET - Tobias Fiebig, DE |
| 3 | retn.bcix.de 2001:7f8:19:1::232a:1 | 11.7ms | 0% | - | NA |
| 4 | 2a02:2d8::57f5:e05f | 24.1ms | 0% | AS9002 | RETN-AS - RETN Limited, GB |
| 5 | * | - | - | - | |
| 6 | 2a02:20d8::1e | 24.6ms | 0% | AS31638 | ASN-LEPIDA - Lepida S.c.p.A., IT |
| 7 | felix.lepida.it 2a02:20d8::9 | 29.4ms | 0% | AS31638 | ASN-LEPIDA - Lepida S.c.p.A., IT |
| 8 | 2a02:20d8:20d8:2a02 | 26.4ms | 0% | - |
tracepath -6
1?: [LOCALHOST] 0.022ms pmtu 1500
1: xe-0-0-13-178.gw01.ber01.as59645.net 0.714ms
1: xe-0-0-13-178.gw01.ber01.as59645.net 0.709ms
2: ae0-2453.cr10.ber01.lwlcom.net 0.963ms
3: retn.bcix.de 10.875ms asymm 5
4: 2a02:2d8::57f5:e05f 24.473ms asymm 5
5: no reply
6: 2a02:20d8::1e 24.977ms asymm 9
7: felix.lepida.it 26.957ms asymm 10
8: 2a02:20d8:20d8:2a02:: 26.808ms reached
Resume: pmtu 1500 hops 8 back 11 From DE host (Düsseldorf) 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 | eth1-0-12-h5594.edge5-dus1.bb.wiit.network 2001:4ba0:92f4:3::1 | 28.9ms | 0% | AS24961 | MYLOC-AS - WIIT AG, DE |
| 3 | lag10-h5f01.agr4-dus1.bb.wiit.network 2001:4ba0:ffe9:7c::1 | 471.1ms | 0% | AS24961 | MYLOC-AS - WIIT AG, DE |
| 4 | lag30.core3-dus1.bb.wiit.network 2001:4ba0:ffe9:109::2 | 0.4ms | 0% | AS24961 | MYLOC-AS - WIIT AG, DE |
| 5 | lag2.core1-dus-ix.bb.wiit.network 2001:4ba0:ffe9:4f::1 | 0.5ms | 0% | AS24961 | MYLOC-AS - WIIT AG, DE |
| 6 | alpha.lepida.it 2001:7f8::7b96:0:2 | 18.2ms | 0% | - | NA |
| 7 | 2a02:20d8::22 | 18.4ms | 0% | AS31638 | ASN-LEPIDA - Lepida S.c.p.A., IT |
| 8 | felix.lepida.it 2a02:20d8::9 | 21.0ms | 0% | AS31638 | ASN-LEPIDA - Lepida S.c.p.A., IT |
| 9 | 2a02:20d8:20d8:2a02 | 20.7ms | 0% | - |
tracepath -6
1?: [LOCALHOST] 0.019ms pmtu 1500
1: xe-0-0-12-142.gw01.dus01.as59645.net 0.514ms
1: xe-0-0-12-142.gw01.dus01.as59645.net 0.233ms
2: eth1-0-12-h5594.edge5-dus1.bb.wiit.network 7.901ms
3: no reply
4: lag11.core3-dus1.bb.wiit.network 0.410ms
5: lag8.core1-dus-ix.bb.wiit.network 0.397ms
6: alpha.lepida.it 18.392ms
7: 2a02:20d8::22 18.719ms
8: felix.lepida.it 21.202ms asymm 9
9: 2a02:20d8:20d8:2a02:: 20.780ms reached
Resume: pmtu 1500 hops 9 back 10 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::2 | 1.7ms | 0% | AS203993 | GNA-DC1-AS - S.J.M. Steffann, NL |
| 2 | * | - | - | - | |
| 3 | ccr2-ccr1.dc1.nogalliance.org 2a00:8642:dc1:2::b | 6.2ms | 0% | AS203993 | GNA-DC1-AS - S.J.M. Steffann, NL |
| 4 | * | - | - | - | |
| 5 | 2a02:20d8::22 | 25.6ms | 0% | AS31638 | ASN-LEPIDA - Lepida S.c.p.A., IT |
| 6 | felix.lepida.it 2a02:20d8::9 | 27.4ms | 0% | AS31638 | ASN-LEPIDA - Lepida S.c.p.A., IT |
| 7 | 2a02:20d8:20d8:2a02 | 29.4ms | 0% | - |
tracepath -6
1?: [LOCALHOST] 0.038ms pmtu 1500
1: 2a00:8642:42::2 2.641ms
1: 2a00:8642:42::2 3.799ms
2: no reply
3: ccr2-ccr1.dc1.nogalliance.org 5.790ms asymm 2
4: no reply
5: 2a02:20d8::22 24.318ms asymm 8
6: felix.lepida.it 26.592ms asymm 10
7: 2a02:20d8:20d8:2a02:: 26.798ms reached
Resume: pmtu 1500 hops 7 back 11 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 | * | - | - | - | |
| 2 | * | - | - | - | |
| 3 | * | - | - | - | |
| 4 | 2001:7f8:b9::17:1 | 12.2ms | 0% | - | NA |
| 5 | 2a02:20d8::1e | 12.5ms | 0% | AS31638 | ASN-LEPIDA - Lepida S.c.p.A., IT |
| 6 | felix.lepida.it 2a02:20d8::9 | 14.2ms | 0% | AS31638 | ASN-LEPIDA - Lepida S.c.p.A., IT |
| 7 | 2a02:20d8:20d8:2a02 | 14.1ms | 0% | - |
tracepath -6
1?: [LOCALHOST] 0.054ms pmtu 1500
1: no reply
2: no reply
3: no reply
4: 2001:7f8:b9::17:1 25.899ms
5: 2a02:20d8::1e 58.480ms
6: felix.lepida.it 14.722ms
7: 2a02:20d8:20d8:2a02:: 14.776ms reached
Resume: pmtu 1500 hops 7 back 7 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 | 1.8ms | 0% | AS5603 | SIOL-NET - Telekom Slovenije, d.d., SI |
| 4 | 2a00:ee0:1:10::2 | 1.1ms | 0% | AS5603 | SIOL-NET - Telekom Slovenije, d.d., SI |
| 5 | alpha.lepida.it 2001:7f8::7b96:0:2 | 54.6ms | 0% | - | NA |
| 6 | 2a02:20d8::22 | 36.8ms | 0% | AS31638 | ASN-LEPIDA - Lepida S.c.p.A., IT |
| 7 | felix.lepida.it 2a02:20d8::9 | 21.0ms | 0% | AS31638 | ASN-LEPIDA - Lepida S.c.p.A., IT |
| 8 | 2a02:20d8:20d8:2a02 | 20.9ms | 0% | - |
tracepath -6
1?: [LOCALHOST] 0.041ms pmtu 9000
1: fw1-lju.6connect.com 0.601ms
1: fw1-lju.6connect.com 0.556ms
2: no reply
3: 2a00:ee1:800:9::1 2.381ms
4: 2a00:ee0:1:15::2 1.176ms asymm 3
5: 2a00:ee0:1:15::2 9.994ms pmtu 1500
5: alpha.lepida.it 37.452ms asymm 8
6: 2a02:20d8::22 39.849ms asymm 9
7: felix.lepida.it 21.222ms asymm 8
8: 2a02:20d8:20d8:2a02:: 21.198ms reached
Resume: pmtu 1500 hops 8 back 10 From SLO host (T-2) openRFC 4890 ✓
filter likely at: (none) · min PMTU on path: 1500
Path (traceroute + mtr + PTR)
| # | IP / PTR | RTT | mtr loss | AS | AS holder |
|---|---|---|---|---|---|
| 1 | * | - | - | - | |
| 2 | 2a01:260:1::225 | 2.2ms | 0%* | AS34779 | T-2-AS - T-2, d.o.o., SI |
| 3 | 2a01-260-1-1--9a.core6.t-2.net 2a01:260:1:1::9a | 2.1ms | 0%* | AS34779 | T-2-AS - T-2, d.o.o., SI |
| 4 | 2a01-260-1-1--38.core6.t-2.net 2a01:260:1:1::38 | 2.5ms | 0%* | AS34779 | T-2-AS - T-2, d.o.o., SI |
| 5 | port-channel1.core1.zag2.he.net 2001:470:0:2ea::2 | 9.7ms | - | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 6 | * | - | 40% | - | |
| 7 | lepida-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:a5d3:1638:129 | 23.0ms | - | - | NA |
| 8 | lepida-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:a5d3:1638:129 | 22.6ms | 0% | - | NA |
| 9 | 2a02:20d8::1e | 23.4ms | 0% | AS31638 | ASN-LEPIDA - Lepida S.c.p.A., IT |
| 10 | 2a02:20d8:20d8:2a02 | 27.2ms | 0% | - |
Rate-limited ICMPv6: hop 6 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.027ms pmtu 1500
1: no reply
2: 2a01:260:1::225 3.087ms
3: 2a01-260-1-1--9c.core6.t-2.net 3.441ms
4: 2a01-260-1-1--38.core6.t-2.net 2.923ms asymm 3
5: port-channel1.core1.zag2.he.net 10.304ms asymm 7
6: port-channel1.core1.zag2.he.net 10.131ms asymm 7
7: lepida.minap.it 19.428ms
8: 2a02:20d8::1e 25.730ms
9: 2a02:20d8::1e 24.024ms asymm 8
10: 2a02:20d8:20d8:2a02:: 23.887ms reached
Resume: pmtu 1500 hops 10 back 10