AS overview
Test target: 2a12:da40::1 · static prefix probe · address space: PA · prefixes announced: 1
prefix(es): 2a12:da40::/32
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 | ||
2a12:da40::1 | prb | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | ? | ? | ✓ | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | ✓ |
RPKI & ASPA
1 of 1 prefix(es) covered by a valid ROA.
| Prefix | RPKI state | Reason | Covering VRP(s) |
|---|---|---|---|
2a12:da40::/32 | ✓ valid | matched VRP (correct origin, length within maxLength) | AS205358 /32 maxLen 32 (ripe) |
Random-IP probe (yarrp) into the AS' prefixes
We probed 35 arbitrary IPv6 address(es) inside AS205358's announced prefix(es). No router inside the prefix responded. The deepest visible hop was 2001:7f8:112::9 at hop 18 - that router does not answer ICMPv6 Echo. This is not in AS205358'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 2026-09-23T12:09:17Z
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 | 0.3ms | 0% | AS13004 | SOX - Serbian Open Exchange DOO, RS |
| 3 | 2001:7f8:1e:8::3d | 0.3ms | 0% | AS13004 | SOX - Serbian Open Exchange DOO, RS |
| 4 | 2001:67c:128c::699 | 17.0ms | 0% | - | NA |
| 5 | 2a12:da40::1 | 54.9ms | 0% | AS205358 | NeoFiber - NEOFIBER SRLS, IT |
tracepath -6
1?: [LOCALHOST] 0.011ms pmtu 1500
1: _gateway 0.515ms
1: _gateway 0.602ms
2: sox-pn.sox.rs 0.607ms
3: 2001:7f8:1e:8::3d 0.711ms asymm 2
4: 2001:67c:128c::699 19.669ms
5: 2a12:da40::1 56.193ms reached
Resume: pmtu 1500 hops 5 back 11 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 | 0.7ms | 0%* | AS59645 | WYBT-NET - Tobias Fiebig, DE |
| 3 | ae0-10.cr10.ber03.lwlcom.net 2a00:c380:b200:230::220 | 0.8ms | 0% | AS50629 | LWLCOM - LWLcom GmbH, DE |
| 4 | ae0-15.cr11.dtm01.lwlcom.net 2a00:c380:b200:230::5 | 8.3ms | 0% | AS50629 | LWLCOM - LWLcom GmbH, DE |
| 5 | ae0-10.cr10.dtm02.lwlcom.net 2a00:c380:b200:230::255 | 8.5ms | 0% | AS50629 | LWLCOM - LWLcom GmbH, DE |
| 6 | ae0-50.cr10.dus02.lwlcom.net 2a00:c380:b200:230::24 | 8.5ms | 0% | AS50629 | LWLCOM - LWLcom GmbH, DE |
| 7 | ae0-10.cr10.dus01.lwlcom.net 2a00:c380:b200:230::187 | 8.4ms | 0% | AS50629 | LWLCOM - LWLcom GmbH, DE |
| 8 | ae6-60.cr10.ams01.lwlcom.net 2a00:c380:b200:230::213 | 11.3ms | 0% | AS50629 | LWLCOM - LWLcom GmbH, DE |
| 9 | 2001:7f8:1::a503:9120:1 | 40.2ms | 0% | - | NA |
| 10 | 2a01:9a80:0:2f::f | 36.6ms | 0% | AS39120 | CONVERGENZE-AS - Convergenze S.p.A., IT |
| 11 | 2a05:4140:2::2 | 39.7ms | 0% | AS212271 | C1V - Cinzia Tocci trading as Lumanex Srl, IT |
| 12 | 2a12:da40::1 | 42.9ms | 0% | AS205358 | NeoFiber - NEOFIBER SRLS, IT |
tracepath -6
1?: [LOCALHOST] 0.026ms pmtu 1500
1: xe-0-0-13-178.gw01.ber01.as59645.net 0.617ms
1: xe-0-0-13-178.gw01.ber01.as59645.net 0.463ms
2: ae0-2453.cr10.ber01.lwlcom.net 1.215ms
3: ae0-10.cr10.ber03.lwlcom.net 1.248ms
4: ae0-15.cr11.dtm01.lwlcom.net 8.771ms asymm 5
5: ae0-10.cr10.dtm02.lwlcom.net 8.986ms asymm 6
6: ae0-20.cr10.dus04.lwlcom.net 8.912ms asymm 5
7: ae0-10.cr10.dus01.lwlcom.net 8.818ms asymm 4
8: ae6-60.cr10.ams01.lwlcom.net 11.561ms asymm 5
9: 2001:7f8:1::a503:9120:1 38.541ms asymm 12
10: 2a01:9a80:0:2f::f 40.616ms asymm 13
11: 2a05:4140:2::2 43.710ms asymm 15
12: 2a12:da40::1 41.716ms reached
Resume: pmtu 1500 hops 12 back 15 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 | 1.9ms | 0% | AS24961 | MYLOC-AS - WIIT AG, DE |
| 3 | * | - | - | - | |
| 4 | lag11.core3-dus1.bb.wiit.network 2001:4ba0:ffe9:115::3 | 0.2ms | 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 | de-cix.convergenze.it 2001:7f8::98d0:0:1 | 22.5ms | 0% | - | NA |
| 7 | 2a01:9a80:0:2f::f | 21.9ms | 0% | AS39120 | CONVERGENZE-AS - Convergenze S.p.A., IT |
| 8 | * | - | 0% | - | |
| 9 | 2a12:da40::1 | 25.2ms | 0% | AS205358 | NeoFiber - NEOFIBER SRLS, IT |
tracepath -6
1?: [LOCALHOST] 0.021ms pmtu 1500
1: xe-0-0-12-142.gw01.dus01.as59645.net 0.361ms
1: xe-0-0-12-142.gw01.dus01.as59645.net 0.341ms
2: eth1-0-12-h5594.edge5-dus1.bb.wiit.network 1.366ms
3: no reply
4: lag30.core3-dus1.bb.wiit.network 0.441ms
5: lag8.core1-dus-ix.bb.wiit.network 0.528ms
6: de-cix.convergenze.it 22.653ms asymm 3
7: 2a01:9a80:0:2f::f 22.488ms asymm 12
8: 2a05:4140:2::2 25.333ms asymm 14
9: 2a12:da40::1 25.253ms reached
Resume: pmtu 1500 hops 9 back 14 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 | 3.1ms | 0% | AS203993 | GNA-DC1-AS - S.J.M. Steffann, NL |
| 2 | gw.friends.steffann.nl 2a00:8642:1000:f000::1 | 3.9ms | 0%* | AS203993 | GNA-DC1-AS - S.J.M. Steffann, NL |
| 3 | 2a00:1ca8:1::194 | 3.8ms | 0% | AS50673 | Serverius-as - Serverius Holding B.V., NL |
| 4 | 2a03:3f40::10:33 | 5.2ms | 0% | AS50673 | Serverius-as - Serverius Holding B.V., NL |
| 5 | 2001:7f8:1::a503:9120:1 | 36.8ms | 0% | - | NA |
| 6 | 2a01:9a80:0:2f::f | 34.9ms | 0% | AS39120 | CONVERGENZE-AS - Convergenze S.p.A., IT |
| 7 | 2a05:4140:2::2 | 42.4ms | 0% | AS212271 | C1V - Cinzia Tocci trading as Lumanex Srl, IT |
| 8 | 2a12:da40::1 | 41.9ms | 0% | AS205358 | NeoFiber - NEOFIBER SRLS, IT |
tracepath -6
1?: [LOCALHOST] 0.069ms pmtu 1500
1: 2a00:8642:42::2 1.993ms
1: 2a00:8642:42::2 1.892ms
2: gw.friends.steffann.nl 3.224ms
3: 2a00:1ca8:1::194 5.291ms
4: 2a03:3f40::10:33 7.244ms
5: 2001:7f8:1::a503:9120:1 35.429ms
6: 2a01:9a80:0:2f::f 36.729ms
7: 2a05:4140:2::2 40.392ms asymm 12
8: 2a12:da40::1 39.272ms reached
Resume: pmtu 1500 hops 8 back 12 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 | 0.5ms | 0%* | AS204471 | KARSOLINK - 2S Computers SRL, IT |
| 2 | * | - | - | - | |
| 3 | * | - | 0% | - | |
| 4 | 2001:7f8:112::12 | 17.9ms | 0% | - | NA |
| 5 | 2a01:9a80:0:2f::f | 17.9ms | 0% | AS39120 | CONVERGENZE-AS - Convergenze S.p.A., IT |
| 6 | 2a05:4140:2::2 | 19.0ms | 0% | AS212271 | C1V - Cinzia Tocci trading as Lumanex Srl, IT |
| 7 | 2a12:da40::1 | 19.1ms | 0% | AS205358 | NeoFiber - NEOFIBER SRLS, IT |
tracepath -6
1?: [LOCALHOST] 0.031ms pmtu 1500
1: karsolink-01.net.karsolink.com 1.044ms
1: karsolink-01.net.karsolink.com 1.107ms
2: no reply
3: 2a12:d8c0:109f:106::a2 3.805ms
4: 2001:7f8:112::12 18.422ms
5: 2a01:9a80:0:2f::f 18.753ms
6: 2a05:4140:2::2 19.504ms asymm 11
7: 2a12:da40::1 19.864ms reached
Resume: pmtu 1500 hops 7 back 11 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 | 0.7ms | - | AS8038 | 6CONNECT - 6connect, Inc., US |
| 3 | 2a00:ee1:800:9::1 | 2.1ms | 30% | AS5603 | SIOL-NET - Telekom Slovenije, d.d., SI |
| 4 | 2a00:ee0:1:10::2 | 1.2ms | 0% | AS5603 | SIOL-NET - Telekom Slovenije, d.d., SI |
| 5 | de-cix.convergenze.it 2001:7f8::98d0:0:1 | 30.9ms | 0% | - | NA |
| 6 | 2a01:9a80:0:2f::f | 30.3ms | 0% | AS39120 | CONVERGENZE-AS - Convergenze S.p.A., IT |
| 7 | 2a05:4140:2::2 | 28.9ms | 0% | AS212271 | C1V - Cinzia Tocci trading as Lumanex Srl, IT |
| 8 | 2a12:da40::1 | 28.8ms | 0% | AS205358 | NeoFiber - NEOFIBER SRLS, IT |
Rate-limited ICMPv6: hop 3 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.025ms pmtu 9000
1: fw1-lju.6connect.com 0.578ms
1: fw1-lju.6connect.com 0.582ms
2: no reply
3: 2a00:ee1:800:9::1 2.181ms
4: 2a00:ee0:1:10::2 1.420ms asymm 3
5: 2a00:ee0:1:10::2 1.804ms pmtu 1500
5: de-cix.convergenze.it 30.937ms asymm 10
6: 2a01:9a80:0:2f::f 30.803ms asymm 11
7: 2a05:4140:2::2 31.135ms asymm 10
8: 2a12:da40::1 29.089ms 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 | * | - | 0%* | - | |
| 2 | 2a01:260:1::225 | 2.4ms | 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 | 2.6ms | 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 | 2.6ms | 0%* | AS34779 | T-2-AS - T-2, d.o.o., SI |
| 5 | * | - | - | - | |
| 6 | * | - | 0% | - | |
| 7 | * | - | - | - | |
| 8 | 2001:7f8:10::3:9120 | 25.0ms | 0% | - | NA |
| 9 | 2001:7f8:10::3:9120 | 25.6ms | 0% | - | NA |
| 10 | 2a05:4140:2::2 | 22.2ms | 0% | AS212271 | C1V - Cinzia Tocci trading as Lumanex Srl, IT |
| 11 | 2a12:da40::1 | 22.5ms | 0% | AS205358 | NeoFiber - NEOFIBER SRLS, IT |
tracepath -6
1?: [LOCALHOST] 0.032ms pmtu 1500
1: 2a01:261:313:b814::1 0.885ms
1: 2a01:261:313:b814::1 1.122ms
2: 2a01:260:1::225 3.693ms
3: 2a01-260-1-1--9a.core6.t-2.net 2.298ms
4: 2a01-260-1-1--38.core6.t-2.net 3.126ms asymm 3
5: port-channel1.core1.zag2.he.net 11.194ms asymm 7
6: port-channel1.core1.zag2.he.net 10.107ms asymm 7
7: e0-36.core2.rom1.he.net 26.287ms
8: e0-36.core2.rom1.he.net 25.565ms asymm 7
9: 2a01:9a80:0:2f::f 25.542ms asymm 7
10: 2a05:4140:2::2 22.914ms asymm 7
11: 2a05:4140:2::2 23.382ms asymm 7
12: 2a12:da40::1 23.159ms reached
Resume: pmtu 1500 hops 12 back 7