AS overview
Test target: 2a05:48c0::1 · static prefix probe · address space: PA · prefixes announced: 2
prefix(es): 2a13:1f40::/29, 2a05:48c0::/29
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 | ||
2a05:48c0::1 | prb | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | ? | ? | ✓ | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | - |
RPKI & ASPA
2 of 2 prefix(es) covered by a valid ROA.
| Prefix | RPKI state | Reason | Covering VRP(s) |
|---|---|---|---|
2a13:1f40::/29 | ✓ valid | matched VRP (correct origin, length within maxLength) | AS207227 /29 maxLen 29 (ripe) |
2a05:48c0::/29 | ✓ valid | matched VRP (correct origin, length within maxLength) | AS207227 /29 maxLen 29 (ripe) |
Random-IP probe (yarrp) into the AS' prefixes
At least one router inside AS207227's announced prefix replied during the random-target probe. Hop(s): 2a05:48c0::9, 2a05:48c0::a, 2a05:48c0::d, 2a05:48c0::e. 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 2026-09-23T12:04:22Z
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
4/4
Echo small (56B) 55.5ms
4/4
Echo 1500B (DF) 55.5ms
yes
Type 1 dest-unreach
443,80
TCP responds on
Path (traceroute + mtr + PTR)
| # | IP / PTR | RTT | mtr loss | AS | AS holder |
|---|---|---|---|---|---|
| 1 | 2a09:ab81::1 | 0.2ms | 0%* | AS60733 | PERKE-NET - ZORAN PEROVIC trading as Agencija Perke.NET, RS |
| 2 | 2001:7f8:1e::108 | 0.3ms | 0% | AS13004 | SOX - Serbian Open Exchange DOO, RS |
| 3 | 2001:b28:3ff::a16f:0:1 | 40.4ms | 0% | AS31500 | GNM-AS - Global Network Management Inc, AG |
| 4 | 2a03:b020::254 | 54.0ms | 0% | AS41327 | FIBERTELECOM-AS - Fiber Telecom S.p.A., IT |
| 5 | 2a03:b020:1:6b::b | 46.1ms | 0% | AS41327 | FIBERTELECOM-AS - Fiber Telecom S.p.A., IT |
| 6 | 2a05:48c0::1 | 50.3ms | 0% | AS207227 | ASN-boot - Bootstrap srl, IT |
tracepath -6
1?: [LOCALHOST] 0.020ms pmtu 1500
1: _gateway 0.653ms
1: _gateway 0.665ms
2: 2001:7f8:1e::108 0.600ms
3: 2001:b28:3ff::a16f:0:1 41.826ms
4: 2a03:b020::254 53.191ms asymm 6
5: 2a03:b020:1:6b::b 47.248ms asymm 8
6: 2a05:48c0::1 53.201ms reached
Resume: pmtu 1500 hops 6 back 8 From DE host (Berlin) openRFC 4890 ✓
filter likely at: (none) · min PMTU on path: 1500
4/4
Echo small (56B) 32.9ms
4/4
Echo 1500B (DF) 32.9ms
yes
Type 1 dest-unreach
443,80
TCP responds on
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 | 8.5ms | 0% | AS50629 | LWLCOM - LWLcom GmbH, DE |
| 5 | ae0-20.cr10.dtm01.lwlcom.net 2a00:c380:b200:230::92 | 8.3ms | 0% | AS50629 | LWLCOM - LWLcom GmbH, DE |
| 6 | ae0-50.cr10.dus02.lwlcom.net 2a00:c380:b200:230::24 | 8.2ms | 0% | AS50629 | LWLCOM - LWLcom GmbH, DE |
| 7 | ae0-10.cr10.dus01.lwlcom.net 2a00:c380:b200:230::187 | 8.5ms | 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 | 2001:7f8:12a::18 | 14.8ms | 0% | - | NA |
| 10 | 2a03:b020::254 | 32.8ms | 0% | AS41327 | FIBERTELECOM-AS - Fiber Telecom S.p.A., IT |
| 11 | 2a03:b020:1:6b::b | 32.8ms | 0% | AS41327 | FIBERTELECOM-AS - Fiber Telecom S.p.A., IT |
| 12 | 2a05:48c0::1 | 32.6ms | 0% | AS207227 | ASN-boot - Bootstrap srl, IT |
tracepath -6
1?: [LOCALHOST] 0.023ms pmtu 1500
1: xe-0-0-13-178.gw01.ber01.as59645.net 0.499ms
1: xe-0-0-13-178.gw01.ber01.as59645.net 0.448ms
2: ae0-2453.cr10.ber01.lwlcom.net 0.970ms
3: ae0-10.cr10.ber03.lwlcom.net 1.175ms
4: ae0-15.cr11.dtm01.lwlcom.net 8.842ms asymm 5
5: ae0-10.cr10.dtm02.lwlcom.net 8.841ms asymm 6
6: ae0-20.cr10.dus04.lwlcom.net 9.192ms asymm 5
7: ae0-20.cr10.dus01.lwlcom.net 8.930ms asymm 4
8: ae6-60.cr10.ams01.lwlcom.net 11.604ms asymm 5
9: 2001:7f8:12a::18 15.254ms asymm 4
10: 2a03:b020::254 32.810ms asymm 4
11: 2a03:b020:1:6b::b 32.783ms asymm 10
12: 2a05:48c0::1 32.987ms reached
Resume: pmtu 1500 hops 12 back 11 From DE host (Düsseldorf) openRFC 4890 ✓
filter likely at: (none) · min PMTU on path: 1500
4/4
Echo small (56B) 22.3ms
3/4
Echo 1500B (DF) 22.3ms
yes
Type 1 dest-unreach
443,80
TCP responds on
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 | ipv6.de-cix.dus.as41327.fibertelecom.com 2001:7f8:9e::a16f:0:1 | 4.1ms | 0% | - | NA |
| 3 | 2a03:b020::254 | 22.0ms | 0% | AS41327 | FIBERTELECOM-AS - Fiber Telecom S.p.A., IT |
| 4 | 2a03:b020:1:6b::b | 21.9ms | 0% | AS41327 | FIBERTELECOM-AS - Fiber Telecom S.p.A., IT |
| 5 | 2a05:48c0::1 | 21.9ms | 0% | AS207227 | ASN-boot - Bootstrap srl, IT |
tracepath -6
1?: [LOCALHOST] 0.017ms pmtu 1500
1: xe-0-0-12-142.gw01.dus01.as59645.net 0.344ms
1: xe-0-0-12-142.gw01.dus01.as59645.net 0.312ms
2: ipv6.de-cix.dus.as41327.fibertelecom.com 4.115ms
3: 2a03:b020::254 22.271ms
4: 2a03:b020:1:6b::b 22.382ms
5: 2a05:48c0::1 21.999ms reached
Resume: pmtu 1500 hops 5 back 10 From NL host (go6lab) openRFC 4890 ✓
filter likely at: (none) · min PMTU on path: 1500
4/4
Echo small (56B) 52.0ms
3/4
Echo 1500B (DF) 46.6ms
yes
Type 1 dest-unreach
-
TCP responds on
Path (traceroute + mtr + PTR)
| # | IP / PTR | RTT | mtr loss | AS | AS holder |
|---|---|---|---|---|---|
| 1 | 2a00:8642:42::2 | 0.0ms | 0% | AS203993 | GNA-DC1-AS - S.J.M. Steffann, NL |
| 2 | * | - | 0%* | - | |
| 3 | speed-ix.fibertelecom.it 2001:7f8:b7::a504:1327:1 | 6.4ms | 0% | - | NA |
| 4 | 2a03:b020::254 | 30.5ms | 0% | AS41327 | FIBERTELECOM-AS - Fiber Telecom S.p.A., IT |
| 5 | 2a03:b020:1:6b::b | 28.3ms | 0% | AS41327 | FIBERTELECOM-AS - Fiber Telecom S.p.A., IT |
| 6 | 2a05:48c0::1 | 28.1ms | 0% | AS207227 | ASN-boot - Bootstrap srl, IT |
tracepath -6
1?: [LOCALHOST] 0.044ms pmtu 1500
1: 2a00:8642:42::2 4.134ms
1: 2a00:8642:42::2 12.388ms
2: gw.friends.steffann.nl 2.536ms
3: speed-ix.fibertelecom.it 5.472ms
4: 2a03:b020::254 29.182ms
5: 2a03:b020:1:6b::b 30.294ms
6: 2a05:48c0::1 31.195ms reached
Resume: pmtu 1500 hops 6 back 6 From ITA host (Karsolink) openRFC 4890 ✓
filter likely at: (none) · min PMTU on path: 1500
3/4
Echo small (56B) 52.8ms
3/4
Echo 1500B (DF) 38.6ms
yes
Type 1 dest-unreach
443,80
TCP responds on
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 | - | AS204471 | KARSOLINK - 2S Computers SRL, IT |
| 2 | 2a12:d8c0:109f:121::a1 | 0.3ms | - | AS204471 | KARSOLINK - 2S Computers SRL, IT |
| 3 | * | - | - | - | |
| 4 | 2a03:b020:1:51::a | 10.1ms | 0% | AS41327 | FIBERTELECOM-AS - Fiber Telecom S.p.A., IT |
| 5 | 2a03:b020::254 | 18.6ms | 0% | AS41327 | FIBERTELECOM-AS - Fiber Telecom S.p.A., IT |
| 6 | 2a03:b020:1:6b::b | 41.8ms | 10% | AS41327 | FIBERTELECOM-AS - Fiber Telecom S.p.A., IT |
| 7 | 2a05:48c0::1 | 22.5ms | 10% | AS207227 | ASN-boot - Bootstrap 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] 0.057ms pmtu 1500
1: karsolink-01.net.karsolink.com 1.043ms
2: 2a12:d8c0:109f:121::a1 1.009ms
3: no reply
4: 2a03:b020:1:51::a 10.786ms
5: 2a03:b020::254 18.406ms
6: 2a03:b020:1:6b::b 30.693ms
7: 2a05:48c0::1 29.070ms reached
Resume: pmtu 1500 hops 7 back 7 From SLO host (6connect) openRFC 4890 ✓
filter likely at: (none) · min PMTU on path: 1500
4/4
Echo small (56B) 20.1ms
3/4
Echo 1500B (DF) 20.2ms
yes
Type 1 dest-unreach
443,80
TCP responds on
Path (traceroute + mtr + PTR)
| # | IP / PTR | RTT | mtr loss | AS | AS holder |
|---|---|---|---|---|---|
| 1 | fw1-lju.6connect.com 2607:fae0:a000::2 | 0.4ms | 0%* | AS8038 | 6CONNECT - 6connect, Inc., US |
| 2 | * | - | - | - | |
| 3 | 2a03:a100:0:201:1::1 | 0.8ms | 0% | AS56635 | XENYA - XENYA inzeniring, proizvodnja in trgovina, d.o.o. Ljubljana, SI |
| 4 | e0-1.core1.lju1.he.net 2001:470:1:5be::1 | 2.0ms | 50% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 5 | * | - | - | - | |
| 6 | port-channel1.core1.zag2.he.net 2001:470:0:2ea::2 | 3.9ms | 40% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 7 | * | - | - | - | |
| 8 | e0-36.core2.rom1.he.net 2001:470:0:4d4::2 | 21.2ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 9 | bootstrap.rom.namex.it 2001:7f8:10::20:7227 | 20.3ms | 0% | - | NA |
| 10 | 2a05:48c0::1 | 20.2ms | 0% | AS207227 | ASN-boot - Bootstrap srl, IT |
Rate-limited ICMPv6: hop 4, hop 6 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.023ms pmtu 9000
1: fw1-lju.6connect.com 0.640ms
1: fw1-lju.6connect.com 0.570ms
2: no reply
3: 2a03:a100:0:201:1::1 0.953ms
4: 2a03:a100:0:201:1::1 0.810ms pmtu 1500
4: e0-1.core1.lju1.he.net 1.901ms
5: no reply
6: port-channel1.core1.zag2.he.net 4.017ms
7: no reply
8: e0-36.core2.rom1.he.net 21.062ms
9: ??? 20.245ms
10: 2a05:48c0::1 20.843ms reached
Resume: pmtu 1500 hops 10 back 11 From SLO host (T-2) openRFC 4890 ✓
filter likely at: (none) · min PMTU on path: 1500
4/4
Echo small (56B) 41.5ms
4/4
Echo 1500B (DF) 41.6ms
yes
Type 1 dest-unreach
443,80
TCP responds on
Path (traceroute + mtr + PTR)
| # | IP / PTR | RTT | mtr loss | AS | AS holder |
|---|---|---|---|---|---|
| 1 | 2a01:261:313:b814::1 | 0.5ms | - | AS34779 | T-2-AS - T-2, d.o.o., SI |
| 2 | 2a01:260:1::225 | 2.2ms | 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 | 33.3ms | 0% | - | NA |
| 5 | hurricane-electric.nikhef.nlsix.net 2001:7f8:13::a500:6939:1 | 35.3ms | 0% | - | NA |
| 6 | be3.core4.fra1.he.net 2001:470:e:5a::2 | 44.8ms | 20% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 7 | be10.core1.zrh2.he.net 2001:470:e:153::2 | 53.9ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 8 | be1.core1.mil2.he.net 2001:470:e:dd::1 | 34.4ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 9 | be1.core1.mil2.he.net 2001:470:e:dd::1 | 34.2ms | - | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 10 | * | - | 0% | - | |
| 11 | e0-36.core2.rom1.he.net 2001:470:0:4d4::2 | 44.5ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 12 | bootstrap.rom.namex.it 2001:7f8:10::20:7227 | 45.2ms | 0% | - | NA |
Rate-limited ICMPv6: hop 6 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.026ms pmtu 1500
1: no reply
2: 2a01:260:1::225 3.575ms
3: 2a01-260-1-1--9c.core6.t-2.net 2.417ms
4: hurricane-electric.nikhef.nlsix.net 48.490ms
5: hurricane-electric.nikhef.nlsix.net 63.009ms asymm 4
6: be1.core2.fra2.he.net 40.646ms asymm 5
7: be10.core1.zrh2.he.net 51.380ms asymm 8
8: be10.core1.zrh2.he.net 52.020ms
9: be1.core1.mil2.he.net 42.430ms asymm 7
10: e0-36.core2.rom1.he.net 45.044ms asymm 7
11: ??? 44.220ms asymm 7
12: bootstrap.rom.namex.it 46.301ms asymm 8
13: 2a05:48c0::1 45.522ms reached
Resume: pmtu 1500 hops 13 back 8