AS overview
Test target: 2a07:cec0:4200::1 · static prefix probe · address space: unknown · prefixes announced: 4
prefix(es): 2a07:cec0:4200::/48, 2a0c:9a40:8830::/48, 2a13:9500:c3::/48, 2a07:cec0:4000::/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 | ||
2a07:cec0:4200::1 | prb | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | ? | ? | ✓ | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | - |
VIX / AAIX / SAIX / TIROL-IX / ERA-IX peering
Not an VIX / AAIX / SAIX / TIROL-IX / ERA-IX member, but our traceroute path crosses the VIX / AAIX / SAIX / TIROL-IX / ERA-IX LAN from SRB host (SOX, Belgrade) - reached via an VIX / AAIX / SAIX / TIROL-IX / ERA-IX-resident transit operator.
RPKI & ASPA
4 of 4 prefix(es) covered by a valid ROA.
| Prefix | RPKI state | Reason | Covering VRP(s) |
|---|---|---|---|
2a07:cec0:4200::/48 | ✓ valid | matched VRP (correct origin, length within maxLength) | AS208024 /48 maxLen 48 (ripe) |
2a0c:9a40:8830::/48 | ✓ valid | matched VRP (correct origin, length within maxLength) | AS208024 /48 maxLen 48 (ripe) |
2a13:9500:c3::/48 | ✓ valid | matched VRP (correct origin, length within maxLength) | AS208024 /48 maxLen 48 (ripe) |
2a07:cec0:4000::/48 | ✓ valid | matched VRP (correct origin, length within maxLength) | AS208024 /48 maxLen 48 (ripe) |
Random-IP probe (yarrp) into the AS' prefixes
We probed 70 arbitrary IPv6 address(es) inside AS208024's announced prefix(es). No router inside the prefix responded. The deepest visible hop was 2001:7f8:7f::c:51 at hop 7 - that router does not answer ICMPv6 Echo. This is not in AS208024'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 2026-09-22T13:56:07Z
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 | 0.2ms | 0% | AS13004 | SOX - Serbian Open Exchange DOO, RS |
| 3 | 2001:7f8:1e:8::3d | 0.6ms | 0% | AS13004 | SOX - Serbian Open Exchange DOO, RS |
| 4 | 2a02:2d8:0:a00e:232a | 45.6ms | 10% | - | |
| 5 | evolus.vix.at @VIX / AAIX / SAIX / TIROL-IX / ERA-IX 2001:7f8:30:0:2:1:21:5120 | 18.4ms | 20% | AS215120 | Evolus |
| 6 | 2a07:cec0:4200::1 | 39.5ms | 0% | AS208024 | Alpenhost - Ronald Agorsah trading as Alpenhost e.U., AT |
Rate-limited ICMPv6: hop 4, hop 5 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.020ms pmtu 1500
1: _gateway 0.682ms
1: _gateway 0.644ms
2: sox-pn.sox.rs 0.693ms
3: 2001:7f8:1e:8::3d 0.682ms asymm 2
4: ae8-930.RT.IRX.VIE.AT.retn.net 22.390ms asymm 3
5: evolus.vix.at 18.638ms asymm 3
6: 2a07:cec0:4200::1 41.570ms reached
Resume: pmtu 1500 hops 6 back 6 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 | 0.7ms | 0%* | AS59645 | WYBT-NET - Tobias Fiebig, DE |
| 3 | ae0-150.cr10.fra01.lwlcom.net 2a00:c380:b200:230::174 | 10.1ms | 0% | AS50629 | LWLCOM - LWLcom GmbH, DE |
| 4 | ae0-100.cr10.fra02.lwlcom.net 2a00:c380:b200:230::215 | 10.5ms | 0% | AS50629 | LWLCOM - LWLcom GmbH, DE |
| 5 | * | - | 0% | - | |
| 6 | 2a07:cec0:4200::1 | 39.0ms | 0% | AS208024 | Alpenhost - Ronald Agorsah trading as Alpenhost e.U., AT |
tracepath -6
1?: [LOCALHOST] 0.029ms pmtu 1500
1: xe-0-0-13-178.gw01.ber01.as59645.net 0.438ms
1: xe-0-0-13-178.gw01.ber01.as59645.net 0.416ms
2: ae0-2453.cr10.ber01.lwlcom.net 1.191ms
3: ae0-150.cr10.fra01.lwlcom.net 10.588ms asymm 7
4: ae0-100.cr10.fra02.lwlcom.net 10.768ms asymm 8
5: 2a03:5f80:4:2::236:221 22.320ms asymm 8
6: 2a07:cec0:4200::1 34.850ms reached
Resume: pmtu 1500 hops 6 back 9 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 | ae0-101.cr10.dus02.lwlcom.net 2a06:d1c0::dead:beef:1301 | 0.3ms | 0%* | AS59645 | WYBT-NET - Tobias Fiebig, DE |
| 3 | ae0-20.cr10.dus01.lwlcom.net 2a00:c380:b200:230::108 | 0.4ms | 0% | AS50629 | LWLCOM - LWLcom GmbH, DE |
| 4 | ae0-90.cr11.dus01.lwlcom.net 2a00:c380:b200:230::222 | 0.7ms | 0% | AS50629 | LWLCOM - LWLcom GmbH, DE |
| 5 | ae0-10.cr10.dus06.lwlcom.net 2a00:c380:b200:230::147 | 0.4ms | 0% | AS50629 | LWLCOM - LWLcom GmbH, DE |
| 6 | ae0-40.cr10.fra06.lwlcom.net 2a00:c380:b200:230::21 | 4.1ms | 0% | AS50629 | LWLCOM - LWLcom GmbH, DE |
| 7 | evolus.peering.cz 2001:7f8:7f::c:51 | 20.4ms | 20% | - | NA |
| 8 | 2a07:cec0:4200::1 | 34.8ms | 0% | AS208024 | Alpenhost - Ronald Agorsah trading as Alpenhost e.U., AT |
Rate-limited ICMPv6: hop 7 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.019ms pmtu 1500
1: xe-0-0-12-142.gw01.dus01.as59645.net 0.251ms
1: xe-0-0-12-142.gw01.dus01.as59645.net 0.216ms
2: ae0-101.cr10.dus02.lwlcom.net 0.358ms
3: ae0-20.cr10.dus01.lwlcom.net 0.849ms
4: ae0-90.cr11.dus01.lwlcom.net 0.669ms
5: ae0-10.cr10.dus06.lwlcom.net 0.757ms
6: ae0-40.cr10.fra06.lwlcom.net 4.392ms
7: evolus.peering.cz 19.324ms
8: 2a07:cec0:4200::1 34.312ms reached
Resume: pmtu 1500 hops 8 back 8 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 | 1.2ms | 0% | AS203993 | GNA-DC1-AS - S.J.M. Steffann, NL |
| 2 | * | - | 0%* | - | |
| 3 | 2a00:1ca8:1::194 | 5.1ms | 0% | AS50673 | Serverius-as - Serverius Holding B.V., NL |
| 4 | 2a03:3f40::10:41 | 2.8ms | 0% | AS50673 | Serverius-as - Serverius Holding B.V., NL |
| 5 | 2a03:5f80:4::226:172 | 20.0ms | 10% | - | NA |
| 6 | 2a07:cec0:4200::1 | 34.9ms | 0% | AS208024 | Alpenhost - Ronald Agorsah trading as Alpenhost e.U., AT |
Rate-limited ICMPv6: hop 5 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.055ms pmtu 1500
1: 2a00:8642:42::2 120.437ms
1: 2a00:8642:42::2 1.819ms
2: gw.friends.steffann.nl 2.629ms
3: 2a00:1ca8:1::194 4.623ms
4: 2a03:3f40::10:41 3.512ms
5: 2a03:5f80:4::226:172 20.904ms
6: 2a07:cec0:4200::1 38.091ms reached
Resume: pmtu 1500 hops 6 back 6 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 | 0%* | AS204471 | KARSOLINK - 2S Computers SRL, IT |
| 2 | 2a12:d8c0:109f:121::a1 | 0.3ms | 0%* | AS204471 | KARSOLINK - 2S Computers SRL, IT |
| 3 | 2a12:d8c0:101f:6::1 | 9.8ms | 10% | AS204471 | KARSOLINK - 2S Computers SRL, IT |
| 4 | * | - | - | - | |
| 5 | 100ge0-0-0-20.core1.vie1.he.net 2001:470:0:414::1 | 21.5ms | 30% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 6 | 2001:7f8:17e::131 | 30.5ms | 10% | - | NA |
| 7 | 2a07:cec0:4200::1 | 49.0ms | 0% | AS208024 | Alpenhost - Ronald Agorsah trading as Alpenhost e.U., AT |
Rate-limited ICMPv6: hop 3, hop 5, hop 6 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.061ms pmtu 1500
1: karsolink-01.net.karsolink.com 0.994ms
2: 2a12:d8c0:109f:121::a1 1.005ms
3: 2a12:d8c0:101f:6::1 10.304ms
4: no reply
5: 100ge0-0-0-20.core1.vie1.he.net 23.323ms
6: 2001:7f8:17e::131 30.897ms
7: 2a07:cec0:4200::1 53.008ms 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 | 0.6ms | 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 | 1.9ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 5 | 100ge0-0-0-5.core1.vie1.he.net 2001:470:0:578::1 | 8.3ms | 20% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 6 | * | - | - | - | |
| 7 | 2a07:cec0:4200::1 | 23.4ms | 0% | AS208024 | Alpenhost - Ronald Agorsah trading as Alpenhost e.U., AT |
Rate-limited ICMPv6: hop 5 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.026ms pmtu 9000
1: fw1-lju.6connect.com 0.597ms
1: fw1-lju.6connect.com 0.447ms
2: no reply
3: 2a03:a100:0:201:1::1 1.076ms
4: 2a03:a100:0:201:1::1 0.832ms pmtu 1500
4: e0-1.core1.lju1.he.net 2.240ms
5: 100ge0-0-0-5.core1.vie1.he.net 9.055ms
6: no reply
7: 2a07:cec0:4200::1 23.944ms reached
Resume: pmtu 1500 hops 7 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 | 0.3ms | 0%* | AS34779 | T-2-AS - T-2, d.o.o., SI |
| 2 | 2a01:260:1::225 | 3.9ms | 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 | 1.8ms | 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 | 2.1ms | - | AS34779 | T-2-AS - T-2, d.o.o., SI |
| 5 | * | - | 10% | - | |
| 6 | 2001:7f8:17e::131 | 9.4ms | 30% | - | NA |
| 7 | 2001:7f8:17e::131 | 9.7ms | 0% | - | NA |
Rate-limited ICMPv6: hop 5, hop 6 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.029ms pmtu 1500
1: 2a01:261:313:b814::1 0.773ms
1: no reply
2: 2a01:260:1::225 13.074ms
3: 2a01-260-1-1--9a.core6.t-2.net 2.849ms
4: no reply
5: 100ge0-0-0-31.core1.vie1.he.net 11.922ms
6: 2001:7f8:17e::131 10.075ms asymm 4
7: 2001:7f8:17e::131 10.318ms asymm 4
8: 2a07:cec0:4200::1 21.783ms reached
Resume: pmtu 1500 hops 8 back 6