AS overview
Test target: 2a0d:2100::1 · static prefix probe · address space: PA · prefixes announced: 1
prefix(es): 2a0d:2100::/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 | ||
2a0d:2100::1 | prb | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | ? | ? | ✓ | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | ✓ |
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 2020-06-20. IPv6 LAN: 2001:7f8:b:100:1d1:a520:4947:108. Locations: -.
RPKI & ASPA
1 of 1 prefix(es) covered by a valid ROA.
| Prefix | RPKI state | Reason | Covering VRP(s) |
|---|---|---|---|
2a0d:2100::/29 | ✓ valid | matched VRP (correct origin, length within maxLength) | AS204947 /29 maxLen 29 (ripe) |
Random-IP probe (yarrp) into the AS' prefixes
We probed 35 arbitrary IPv6 address(es) inside AS204947's announced prefix(es). No router inside the prefix responded. The deepest visible hop was 2001:4ba0:ffe9:db::2 at hop 11 - that router answers ICMPv6 Echo. This is not in AS204947'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 2026-09-23T12:07:21Z
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 | 0.2ms | 0%* | AS60733 | PERKE-NET - ZORAN PEROVIC trading as Agencija Perke.NET, RS |
| 2 | 2001:7f8:1e::108 | 0.4ms | 0% | AS13004 | SOX - Serbian Open Exchange DOO, RS |
| 3 | 2001:b28:3ff::a16f:0:1 | 41.5ms | 0% | AS31500 | GNM-AS - Global Network Management Inc, AG |
| 4 | 2a03:b020::251 | 65.7ms | 0% | AS41327 | FIBERTELECOM-AS - Fiber Telecom S.p.A., IT |
| 5 | 2a0d:2100::1 | 69.9ms | 0% | AS204947 | Speed-net_SRL - SPEED-NET S.R.L, IT |
tracepath -6
1?: [LOCALHOST] 0.014ms pmtu 1500
1: _gateway 0.357ms
1: _gateway 0.399ms
2: 2001:7f8:1e::108 0.828ms
3: 2001:b28:3ff::a16f:0:1 46.761ms
4: 2a03:b020::251 62.332ms asymm 6
5: 2a0d:2100::1 65.139ms reached
Resume: pmtu 1500 hops 5 back 5 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 | 0.3ms | 0%* | AS59645 | WYBT-NET - Tobias Fiebig, DE |
| 2 | ae0-2453.cr10.ber01.lwlcom.net 2a06:d1c0::dead:beef:1c02 | 0.6ms | 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 | ae0-20.cr10.dtm01.lwlcom.net 2a00:c380:b200:230::92 | 24.2ms | 0% | AS50629 | LWLCOM - LWLcom GmbH, DE |
| 6 | ae0-50.cr10.dus02.lwlcom.net 2a00:c380:b200:230::24 | 8.4ms | 0% | AS50629 | LWLCOM - LWLcom GmbH, DE |
| 7 | ae0-20.cr10.dus01.lwlcom.net 2a00:c380:b200:230::108 | 8.7ms | 0% | AS50629 | LWLCOM - LWLcom GmbH, DE |
| 8 | ae6-60.cr10.ams01.lwlcom.net 2a00:c380:b200:230::213 | 11.2ms | 0% | AS50629 | LWLCOM - LWLcom GmbH, DE |
| 9 | 2001:7f8:12a::18 | 15.0ms | 0% | - | NA |
| 10 | 2a03:b020::251 | 44.1ms | 0% | AS41327 | FIBERTELECOM-AS - Fiber Telecom S.p.A., IT |
| 11 | 2a0d:2100::1 | 47.5ms | 0% | AS204947 | Speed-net_SRL - SPEED-NET S.R.L, IT |
tracepath -6
1?: [LOCALHOST] 0.021ms pmtu 1500
1: xe-0-0-13-178.gw01.ber01.as59645.net 0.483ms
1: xe-0-0-13-178.gw01.ber01.as59645.net 0.502ms
2: ae0-2453.cr10.ber01.lwlcom.net 1.095ms
3: ae0-10.cr10.ber03.lwlcom.net 1.318ms
4: ae0-15.cr11.dtm01.lwlcom.net 8.647ms asymm 5
5: ae0-20.cr10.dtm01.lwlcom.net 8.787ms asymm 4
6: ae0-50.cr10.dus02.lwlcom.net 8.886ms asymm 3
7: ae0-20.cr10.dus01.lwlcom.net 8.959ms asymm 4
8: ae6-60.cr10.ams01.lwlcom.net 11.541ms asymm 5
9: 2001:7f8:12a::18 15.299ms asymm 4
10: 2a03:b020::251 73.126ms asymm 4
11: 2a0d:2100::1 48.244ms reached
Resume: pmtu 1500 hops 11 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 | 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 | 1.0ms | 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 | lag0-vl1011.core1-fra-ix.bb.wiit.network 2001:4ba0:ffe9:8a::2 | 4.3ms | 0% | AS24961 | MYLOC-AS - WIIT AG, DE |
| 6 | lag0-vl1001.core1-nbg-ncd.bb.wiit.network 2001:4ba0:ffe9:103e::1 | 6.8ms | 0% | AS24961 | MYLOC-AS - WIIT AG, DE |
| 7 | lag0-vl6.core2-nbg-ncd.bb.wiit.network 2001:4ba0:ffe9:103b::1 | 6.8ms | 0% | AS24961 | MYLOC-AS - WIIT AG, DE |
| 8 | 2001:4ba0:ffe9:b8 | 9.5ms | 0% | - | |
| 9 | lag0-vl1009.core1-muc-eq3.bb.wiit.network 2001:4ba0:ffe9:a7::1 | 9.9ms | 0% | AS24961 | MYLOC-AS - WIIT AG, DE |
| 10 | lag0-vl1001.core1-pda-vsix.bb.wiit.network 2001:4ba0:ffe9:da::2 | 33.2ms | 0% | AS24961 | MYLOC-AS - WIIT AG, DE |
| 11 | lag0-vl1001.core1-mil-mix.bb.wiit.network 2001:4ba0:ffe9:db::2 | 20.0ms | 0% | AS24961 | MYLOC-AS - WIIT AG, DE |
| 12 | 2a0d:2100::1 | 44.7ms | 0% | AS204947 | Speed-net_SRL - SPEED-NET S.R.L, IT |
tracepath -6
1?: [LOCALHOST] 0.026ms pmtu 1500
1: xe-0-0-12-142.gw01.dus01.as59645.net 0.411ms
1: xe-0-0-12-142.gw01.dus01.as59645.net 0.325ms
2: eth1-0-12-h5594.edge5-dus1.bb.wiit.network 1.269ms
3: no reply
4: lag30.core3-dus1.bb.wiit.network 0.374ms
5: lag0-vl1011.core1-fra-ix.bb.wiit.network 5.070ms
6: lag0-vl1001.core1-nbg-ncd.bb.wiit.network 6.904ms
7: lag0-vl6.core2-nbg-ncd.bb.wiit.network 7.048ms
8: lag0-vl1006.core2-muc2.bb.wiit.network 9.794ms
9: lag0-vl1009.core1-muc-eq3.bb.wiit.network 9.986ms
10: lag0-vl1001.core1-pda-vsix.bb.wiit.network 20.439ms
11: lag0-vl1001.core1-mil-mix.bb.wiit.network 20.327ms asymm 9
12: 2a0d:2100::1 44.050ms reached
Resume: pmtu 1500 hops 12 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 | 1.4ms | 0% | AS203993 | GNA-DC1-AS - S.J.M. Steffann, NL |
| 2 | * | - | 0%* | - | |
| 3 | speed-ix.fibertelecom.it 2001:7f8:b7::a504:1327:1 | 4.1ms | 0% | - | NA |
| 4 | 2a03:b020::251 | 40.0ms | 0% | AS41327 | FIBERTELECOM-AS - Fiber Telecom S.p.A., IT |
| 5 | 2a0d:2100::1 | 41.2ms | 0% | AS204947 | Speed-net_SRL - SPEED-NET S.R.L, IT |
tracepath -6
1?: [LOCALHOST] 0.035ms pmtu 1500
1: 2a00:8642:42::2 1.756ms
1: 2a00:8642:42::2 2.940ms
2: no reply
3: speed-ix.fibertelecom.it 3.718ms
4: 2a03:b020::251 39.640ms
5: 2a0d:2100::1 42.326ms reached
Resume: pmtu 1500 hops 5 back 5 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 | - | AS204471 | KARSOLINK - 2S Computers SRL, IT |
| 2 | * | - | - | - | |
| 3 | 2a12:d8c0:101f:103::1 | 8.5ms | - | AS204471 | KARSOLINK - 2S Computers SRL, IT |
| 4 | 2a0d:2100::1 | 29.8ms | 0% | AS204947 | Speed-net_SRL - SPEED-NET S.R.L, IT |
tracepath -6
1?: [LOCALHOST] 0.034ms pmtu 1500
1: no reply
2: no reply
3: no reply
4: 2a0d:2100::1 31.253ms reached
Resume: pmtu 1500 hops 4 back 4 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 | 0.7ms | 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 | 2.1ms | 20% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 5 | * | - | - | - | |
| 6 | port-channel1.core1.zag2.he.net 2001:470:0:2ea::2 | 4.1ms | 50% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 7 | * | - | - | - | |
| 8 | 2a0d:2100::1 | 37.8ms | 0% | AS204947 | Speed-net_SRL - SPEED-NET S.R.L, 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] 0.031ms pmtu 9000
1: fw1-lju.6connect.com 0.432ms
1: fw1-lju.6connect.com 0.460ms
2: no reply
3: 2a03:a100:0:201:1::1 1.235ms
4: 2a03:a100:0:201:1::1 0.874ms pmtu 1500
4: e0-1.core1.lju1.he.net 2.088ms
5: no reply
6: port-channel1.core1.zag2.he.net 83.449ms
7: no reply
8: 2a0d:2100::1 35.617ms reached
Resume: pmtu 1500 hops 8 back 6 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 | 2a01:261:313:b814::1 | 0.5ms | 0%* | AS34779 | T-2-AS - T-2, d.o.o., SI |
| 2 | 2a01:260:1::225 | 2.5ms | 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 | 1.7ms | 0%* | AS34779 | T-2-AS - T-2, d.o.o., SI |
| 4 | 2a01-260-1-1--39.core6.t-2.net 2a01:260:1:1::39 | 2.0ms | 0% | AS34779 | T-2-AS - T-2, d.o.o., SI |
| 5 | hurricane-electric.nikhef.nlsix.net 2001:7f8:13::a500:6939:1 | 34.2ms | 0% | - | NA |
| 6 | be1.core2.fra2.he.net 2001:470:e:43::2 | 40.2ms | 40% | 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 | be10.core1.zrh2.he.net 2001:470:e:153::2 | 53.8ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 9 | * | - | - | - | |
| 10 | 2a0d:2100::1 | 63.6ms | 0% | AS204947 | Speed-net_SRL - SPEED-NET S.R.L, IT |
Rate-limited ICMPv6: hop 6 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.030ms pmtu 1500
1: 2a01:261:313:b814::1 0.973ms
1: no reply
2: 2a01:260:1::225 2.993ms
3: 2a01-260-1-1--9c.core6.t-2.net 2.620ms
4: hurricane-electric.nikhef.nlsix.net 34.806ms
5: be7.core2.fra2.he.net 43.302ms
6: be3.core4.fra1.he.net 45.626ms asymm 7
7: be3.core4.fra1.he.net 42.304ms
8: be10.core1.zrh2.he.net 46.593ms
9: no reply
10: 2a0d:2100::1 60.337ms reached
Resume: pmtu 1500 hops 10 back 7