AS overview
Test target: 2a10:1c40::ffff · static prefix probe · address space: PA · prefixes announced: 2
prefix(es): 2a10:1c40:1::/48, 2a10:1c40::/48
Targets & per-vantage-point probe results (1 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 | ||
2a10:1c40::ffff | prb | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | ? | ? | ✓ | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | 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) |
|---|---|---|---|
2a10:1c40:1::/48 | - not-found | no covering VRP | |
2a10:1c40::/48 | - not-found | no covering VRP |
Random-IP probe (yarrp) into the AS' prefixes
At least one router inside AS206222's announced prefix replied during the random-target probe. Hop(s): 2a10:1c40::1. 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 2026-09-23T12:08:21Z
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 | 0.5ms | 0% | AS13004 | SOX - Serbian Open Exchange DOO, RS |
| 3 | 2001:7f8:1e:8::3d | 0.5ms | 0% | AS13004 | SOX - Serbian Open Exchange DOO, RS |
| 4 | 2001:67c:128c::699 | 17.9ms | 0% | - | NA |
| 5 | 2a10:1c40::ffff | 40.4ms | 0% | AS206222 | duemilanet - 2000net srl, IT |
tracepath -6
1?: [LOCALHOST] 0.011ms pmtu 1500
1: _gateway 0.434ms
1: _gateway 0.543ms
2: sox-pn.sox.rs 0.561ms
3: 2001:7f8:1e:8::3d 0.593ms asymm 2
4: 2001:67c:128c::699 17.228ms
5: 2a10:1c40::ffff 39.105ms reached
Resume: pmtu 1500 hops 5 back 9 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 | xe-0-0-13-178.gw01.ber01.as59645.net 2a06:d1c1:100:b::1 | 0.2ms | 0%* | AS59645 | WYBT-NET - Tobias Fiebig, DE |
| 2 | ae0-2453.cr10.ber01.lwlcom.net 2a06:d1c0::dead:beef:1c02 | 0.5ms | 0%* | AS59645 | WYBT-NET - Tobias Fiebig, DE |
| 3 | ae0-150.cr10.fra01.lwlcom.net 2a00:c380:b200:230::174 | 10.2ms | 0% | AS50629 | LWLCOM - LWLcom GmbH, DE |
| 4 | ae0-100.cr10.fra02.lwlcom.net 2a00:c380:b200:230::215 | 10.3ms | 0% | AS50629 | LWLCOM - LWLcom GmbH, DE |
| 5 | ffm-b29-link.ip.twelve99.net 2001:2035:0:2741::1 | 12.6ms | 0% | AS1299 | TWELVE99 - Arelion Sweden AB, SE |
| 6 | 2001:2034:a:3bb | 27.6ms | 0% | - | |
| 7 | retelitdigital-ic-375445.ip.twelve99-cust.net 2001:2035:0:24bc::2 | 21.8ms | 0% | AS1299 | TWELVE99 - Arelion Sweden AB, SE |
| 8 | 2001:1bd0:0:2::5 | 20.1ms | 0% | AS28716 | RETELIT-AS - Retelit Digital Services S.p.A., IT |
| 9 | 2a10:1c40::ffff | 21.5ms | 0% | AS206222 | duemilanet - 2000net srl, IT |
tracepath -6
1?: [LOCALHOST] 0.010ms pmtu 1500
1: xe-0-0-13-178.gw01.ber01.as59645.net 28.423ms
1: xe-0-0-13-178.gw01.ber01.as59645.net 0.417ms
2: ae0-2453.cr10.ber01.lwlcom.net 0.986ms
3: ae0-150.cr10.fra01.lwlcom.net 10.427ms asymm 7
4: ae0-100.cr10.fra02.lwlcom.net 10.789ms asymm 8
5: ffm-b29-link.ip.twelve99.net 13.127ms asymm 9
6: ffm-bb2-link.ip.twelve99.net 27.952ms asymm 7
7: retelitdigital-ic-375445.ip.twelve99-cust.net 19.967ms asymm 13
8: 2001:1bd0:0:2::5 20.228ms asymm 12
9: 2a10:1c40::ffff 20.656ms reached
Resume: pmtu 1500 hops 9 back 13 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 | xe-0-0-12-142.gw01.dus01.as59645.net 2a06:d1c1:100:d::1 | 0.2ms | 0%* | AS59645 | WYBT-NET - Tobias Fiebig, DE |
| 2 | eth1-0-12-h5594.edge5-dus1.bb.wiit.network 2001:4ba0:92f4:3::1 | 0.9ms | 0% | AS24961 | MYLOC-AS - WIIT AG, DE |
| 3 | * | - | - | - | |
| 4 | lag30.core3-dus1.bb.wiit.network 2001:4ba0:ffe9:109::2 | 0.2ms | 0% | AS24961 | MYLOC-AS - WIIT AG, DE |
| 5 | lag8.core1-dus-ix.bb.wiit.network 2001:4ba0:ffe9:8::2 | 0.4ms | 0% | AS24961 | MYLOC-AS - WIIT AG, DE |
| 6 | 6te2-2.mivivxmr01.retelit.it 2001:7f8::702c:0:1 | 14.0ms | 0% | - | NA |
| 7 | 2001:1bd0:0:2::5 | 19.3ms | 0% | AS28716 | RETELIT-AS - Retelit Digital Services S.p.A., IT |
| 8 | 2a10:1c40::ffff | 16.1ms | 0% | AS206222 | duemilanet - 2000net srl, IT |
tracepath -6
1?: [LOCALHOST] 0.018ms pmtu 1500
1: xe-0-0-12-142.gw01.dus01.as59645.net 0.407ms
1: xe-0-0-12-142.gw01.dus01.as59645.net 0.395ms
2: eth1-0-12-h5594.edge5-dus1.bb.wiit.network 1.133ms
3: no reply
4: lag11.core3-dus1.bb.wiit.network 0.392ms
5: lag2.core1-dus-ix.bb.wiit.network 0.589ms
6: 6te2-2.mivivxmr01.retelit.it 14.022ms asymm 12
7: 2001:1bd0:0:2::5 14.666ms asymm 11
8: 2a10:1c40::ffff 14.827ms reached
Resume: pmtu 1500 hops 8 back 12 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 | 1.8ms | 0% | AS203993 | GNA-DC1-AS - S.J.M. Steffann, NL |
| 2 | * | - | 0%* | - | |
| 3 | 2a00:1ca8:1::194 | 7.8ms | 0% | AS50673 | Serverius-as - Serverius Holding B.V., NL |
| 4 | 2a03:3f40::10:33 | 5.8ms | 0% | AS50673 | Serverius-as - Serverius Holding B.V., NL |
| 5 | ae22-404.ams10.core-backbone.com 2a01:4a0:1338:155::1 | 6.7ms | 0% | AS201011 | CORE-BACKBONE - Core-Backbone GmbH, DE |
| 6 | ae16-2074.fra10.core-backbone.com 2a01:4a0:0:2074::3 | 11.1ms | 0% | AS201011 | CORE-BACKBONE - Core-Backbone GmbH, DE |
| 7 | ae2-2021.fra20.core-backbone.com 2a01:4a0:0:2021::4 | 14.6ms | 0% | AS201011 | CORE-BACKBONE - Core-Backbone GmbH, DE |
| 8 | 6te2-2.mivivxmr01.retelit.it 2001:7f8::702c:0:1 | 25.6ms | 0% | - | NA |
| 9 | 2001:1bd0:0:2::5 | 24.3ms | 0% | AS28716 | RETELIT-AS - Retelit Digital Services S.p.A., IT |
| 10 | 2a10:1c40::ffff | 51.9ms | 0% | AS206222 | duemilanet - 2000net srl, IT |
tracepath -6
1?: [LOCALHOST] 0.061ms pmtu 1500
1: 2a00:8642:42::2 173.798ms
1: 2a00:8642:42::2 3.832ms
2: gw.friends.steffann.nl 3.998ms
3: 2a00:1ca8:1::194 4.089ms
4: 2a03:3f40::10:33 7.871ms
5: ae22-404.ams10.core-backbone.com 5.709ms
6: ae16-2074.fra10.core-backbone.com 13.746ms
7: ae2-2021.fra20.core-backbone.com 15.333ms
8: 6te2-2.mivivxmr01.retelit.it 23.332ms asymm 7
9: 2001:1bd0:0:2::5 24.350ms asymm 8
10: 2a10:1c40::ffff 27.441ms reached
Resume: pmtu 1500 hops 10 back 9 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 | 0.4ms | - | AS204471 | KARSOLINK - 2S Computers SRL, IT |
| 2 | * | - | 0%* | - | |
| 3 | * | - | 40% | - | |
| 4 | 2a03:b020:1:51::a | 10.0ms | 0% | AS41327 | FIBERTELECOM-AS - Fiber Telecom S.p.A., IT |
| 5 | 2a03:b020::224 | 18.7ms | 0% | AS41327 | FIBERTELECOM-AS - Fiber Telecom S.p.A., IT |
| 6 | 6te2-2.mivivxmr01.retelit.it 2001:7f8::702c:0:1 | 19.9ms | 0% | - | NA |
| 7 | 2001:1bd0:0:2::5 | 19.8ms | 0% | AS28716 | RETELIT-AS - Retelit Digital Services S.p.A., IT |
| 8 | 2a10:1c40::ffff | 59.7ms | 0% | AS206222 | duemilanet - 2000net srl, IT |
Rate-limited ICMPv6: hop 3 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.032ms pmtu 1500
1: no reply
2: 2a12:d8c0:109f:121::a1 0.736ms
3: 2a12:d8c0:101f:6::1 10.303ms
4: 2a03:b020:1:51::a 10.587ms
5: 2a03:b020::224 22.830ms
6: 6te2-2.mivivxmr01.retelit.it 20.819ms asymm 7
7: 2001:1bd0:0:2::5 20.453ms asymm 6
8: 2a10:1c40::ffff 72.859ms reached
Resume: pmtu 1500 hops 8 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 | 2.2ms | 50% | 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 | 6te2-2.mivivxmr01.retelit.it 2001:7f8::702c:0:1 | 17.2ms | 0% | - | NA |
| 6 | 2001:1bd0:0:2::5 | 17.2ms | 0% | AS28716 | RETELIT-AS - Retelit Digital Services S.p.A., IT |
| 7 | 2a10:1c40::ffff | 34.8ms | 0% | AS206222 | duemilanet - 2000net srl, IT |
Rate-limited ICMPv6: hop 3 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.030ms pmtu 9000
1: fw1-lju.6connect.com 0.594ms
1: fw1-lju.6connect.com 0.741ms
2: no reply
3: 2a00:ee1:800:9::1 3.242ms
4: 2a00:ee0:1:15::2 1.447ms asymm 3
5: 2a00:ee0:1:10::2 1.915ms pmtu 1500
5: 6te2-2.mivivxmr01.retelit.it 17.394ms asymm 10
6: 2001:1bd0:0:2::5 17.519ms asymm 9
7: 2a10:1c40::ffff 18.462ms reached
Resume: pmtu 1500 hops 7 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 | * | - | 0%* | - | |
| 2 | 2a01:260:1::225 | 4.8ms | 0%* | AS34779 | T-2-AS - T-2, d.o.o., SI |
| 3 | 2a01-260-1-1--9c.core6.t-2.net 2a01:260:1:1::9c | 2.3ms | 0%* | AS34779 | T-2-AS - T-2, d.o.o., SI |
| 4 | hurricane-electric.nikhef.nlsix.net 2001:7f8:13::a500:6939:1 | 40.3ms | 0%* | - | NA |
| 5 | be7.core2.fra2.he.net 2001:470:e:18::2 | 41.0ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 6 | be7.core2.fra2.he.net 2001:470:e:18::2 | 40.9ms | 20% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 7 | * | - | 10% | - | |
| 8 | 6te2-2.mivivxmr01.retelit.it 2001:7f8::702c:0:1 | 32.7ms | - | - | NA |
| 9 | 6te2-2.mivivxmr01.retelit.it 2001:7f8::702c:0:1 | 37.2ms | 0% | - | NA |
| 10 | 2a10:1c40::ffff | 38.4ms | 0% | AS206222 | duemilanet - 2000net srl, IT |
Rate-limited ICMPv6: hop 6, hop 7 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.026ms pmtu 1500
1: 2a01:261:313:b814::1 1.163ms
1: no reply
2: 2a01:260:1::225 16.831ms
3: 2a01-260-1-1--9a.core6.t-2.net 2.698ms
4: hurricane-electric.nikhef.nlsix.net 35.562ms
5: hurricane-electric.nikhef.nlsix.net 37.570ms asymm 4
6: be7.core2.fra2.he.net 45.208ms asymm 5
7: no reply
8: 6te2-2.mivivxmr01.retelit.it 38.375ms asymm 9
9: 2001:1bd0:0:2::5 35.063ms asymm 8
10: 2001:1bd0:0:2::5 42.020ms asymm 8
11: 2a10:1c40::ffff 39.245ms reached
Resume: pmtu 1500 hops 11 back 9