AS59890 - Kabel-TV-Lampert Kabel-TV LampertRFC 4890 ✓RPKI ✓ 4/4ASPA -

AS overview

Test target: 2a05:1140:3::3 · ns1.as59890.net · address space: unknown · prefixes announced: 4

prefix(es): 2a05:1140::/32, 2a05:1142::/32, 2a05:1140::/29, 2a05:1141::/32

VIX / AAIX / SAIX / TIROL-IX / ERA-IX peering

Random-IP probe (yarrp) into the AS' prefixes

We probed 70 arbitrary IPv6 address(es) inside AS59890's announced prefix(es). No router inside the prefix responded. The deepest visible hop was 2a02:6ea0:1:2::130 at hop 13 - that router does not answer ICMPv6 Echo. This is not in AS59890'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 2026-09-24T13:32:28Z

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)

Rate-limited ICMPv6: hop 3 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).

tracepath -6

 1?: [LOCALHOST]                        0.016ms pmtu 1500
 1:  _gateway                                              0.391ms 
 1:  _gateway                                              0.678ms 
 2:  2001:7f8:1e::4                                        0.618ms 
 3:  2001:7f8:30:0:2:1:5:9890                             20.661ms 
 4:  no reply
 5:  no reply
 6:  no reply
 7:  no reply
 8:  no reply
 9:  no reply
10:  no reply
11:  no reply
12:  no reply
13:  no reply
14:  no reply
15:  no reply
16:  no reply
17:  no reply
18:  no reply
19:  no reply
     Too many hops: pmtu 1500
     Resume: pmtu 1500 

From DE host (Berlin)   openRFC 4890 ✓

filter likely at: (none) · min PMTU on path: 1500

Path (traceroute + mtr + PTR)

tracepath -6

 1?: [LOCALHOST]                        0.031ms pmtu 1500
 1:  xe-0-0-13-178.gw01.ber01.as59645.net                  0.844ms 
 1:  xe-0-0-13-178.gw01.ber01.as59645.net                  0.566ms 
 2:  ae0-2453.cr10.ber01.lwlcom.net                        1.045ms 
 3:  ae3-90.cr10.ham01.lwlcom.net                          5.362ms 
 4:  ae0-50.cr11.ham01.lwlcom.net                          5.271ms 
 5:  2a00:c380:f000::4b                                    5.725ms asymm  4 
 6:  ae4-2087.dus10.core-backbone.com                     11.657ms asymm  5 
 7:  ae21-2071.fra10.core-backbone.com                    11.203ms asymm  5 
 8:  ae2-2021.fra20.core-backbone.com                     11.040ms asymm  4 
 9:  ae6-2003.nbg20.core-backbone.com                     12.609ms asymm  6 
10:  ae2-2032.muc20.core-backbone.com                     15.023ms asymm  7 
11:  ae1-2028.vie10.core-backbone.com                     20.503ms asymm  8 
12:  coreb-vie.cdn77.com                                  25.979ms asymm  8 
13:  vl250.vie-itx1-core-1.cdn77.com                      25.436ms asymm  8 
14:  no reply
15:  no reply
16:  no reply
17:  no reply
18:  no reply
19:  no reply
     Too many hops: pmtu 1500
     Resume: pmtu 1500 

From DE host (Düsseldorf)   openRFC 4890 ✓

filter likely at: (none) · min PMTU on path: 1500

Path (traceroute + mtr + PTR)

tracepath -6

 1?: [LOCALHOST]                        0.019ms pmtu 1500
 1:  xe-0-0-12-142.gw01.dus01.as59645.net                  0.347ms 
 1:  xe-0-0-12-142.gw01.dus01.as59645.net                  0.304ms 
 2:  eth1-0-12-h5594.edge5-dus1.bb.wiit.network            1.204ms 
 3:  no reply
 4:  lag30.core3-dus1.bb.wiit.network                      0.428ms 
 5:  lag0-vl1011.core1-fra-ix.bb.wiit.network              4.330ms 
 6:  lag0-vl7.core1-fra-eq5.bb.wiit.network                8.931ms 
 7:  lag1.core1-lpg-green-lu2.bb.wiit.network             20.234ms 
 8:  as59890.swissix.ch                                   12.644ms 
 9:  no reply
10:  no reply
11:  no reply
12:  no reply
13:  no reply
14:  no reply
15:  no reply
16:  no reply
17:  no reply
18:  no reply
19:  no reply
     Too many hops: pmtu 1500
     Resume: pmtu 1500 

From NL host (go6lab)   openRFC 4890 ✓

filter likely at: (none) · min PMTU on path: 1500

Path (traceroute + mtr + PTR)

Rate-limited ICMPv6: hop 3, hop 4, hop 8 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).

tracepath -6

 1?: [LOCALHOST]                        0.025ms pmtu 1500
 1:  2a00:8642:42::2                                       1.893ms 
 1:  2a00:8642:42::2                                       1.055ms 
 2:  no reply
 3:  speed-ix.he.net                                       7.730ms 
 4:  be2.core4.fra1.he.net                                12.440ms 
 5:  be10.core1.zrh2.he.net                               21.712ms 
 6:  no reply
 7:  be1.core3.zrh3.he.net                                19.011ms 
 8:  as59890.swissix.ch                                   20.160ms asymm  7 
 9:  no reply
10:  no reply
11:  no reply
12:  no reply
13:  no reply
14:  no reply
15:  no reply
16:  no reply
17:  no reply
18:  no reply
19:  no reply
     Too many hops: pmtu 1500
     Resume: pmtu 1500 

From ITA host (Karsolink)   openRFC 4890 ✓

filter likely at: (none) · min PMTU on path: 1500

Path (traceroute + mtr + PTR)

Rate-limited ICMPv6: hop 5 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).

tracepath -6

 1?: [LOCALHOST]                        0.030ms pmtu 1500
 1:  karsolink-01.net.karsolink.com                        0.883ms 
 1:  karsolink-01.net.karsolink.com                        0.878ms 
 2:  2a12:d8c0:109f:121::a1                                1.037ms 
 3:  2a12:d8c0:101f:103::1                                 8.874ms 
 4:  ae8-202.RT.CLR.MIL.IT.retn.net                        8.247ms asymm  5 
 5:  RT.IRX.ZRH.CH.retn.net                               11.959ms 
 6:  no reply
 7:  no reply
 8:  no reply
 9:  no reply
10:  no reply
11:  no reply
12:  no reply
13:  no reply
14:  no reply
15:  no reply
16:  no reply
17:  no reply
18:  no reply
19:  no reply
     Too many hops: pmtu 1500
     Resume: pmtu 1500 

From SLO host (6connect)   openRFC 4890 ✓

filter likely at: (none) · min PMTU on path: 1500

Path (traceroute + mtr + PTR)

Rate-limited ICMPv6: hop 4, hop 5, hop 6, hop 8 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).

tracepath -6

 1?: [LOCALHOST]                        0.016ms pmtu 9000
 1:  fw1-lju.6connect.com                                  0.558ms 
 1:  fw1-lju.6connect.com                                  0.455ms 
 2:  no reply
 3:  2a03:a100:0:201:1::1                                  0.995ms 
 4:  2a03:a100:0:201:1::1                                  0.889ms pmtu 1500
 4:  e0-1.core1.lju1.he.net                                1.986ms 
 5:  no reply
 6:  be3.core1.prg1.he.net                                13.516ms 
 7:  no reply
 8:  no reply
 9:  no reply
10:  no reply
11:  no reply
12:  no reply
13:  no reply
14:  no reply
15:  no reply
16:  no reply
17:  no reply
18:  no reply
19:  no reply
     Too many hops: pmtu 1500

From SLO host (T-2)   openRFC 4890 ✓

filter likely at: (none) · min PMTU on path: 1500

Path (traceroute + mtr + PTR)

Rate-limited ICMPv6: hop 5 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).

tracepath -6

 1?: [LOCALHOST]                        0.027ms pmtu 1500
 1:  no reply
 2:  2a01:260:1::225                                       3.203ms 
 3:  2a01-260-1-1--9a.core6.t-2.net                        2.909ms 
 4:  2a01-260-1-1--38.core6.t-2.net                        3.066ms asymm  3 
 5:  2a01-260-1-1--2a.core6.t-2.net                        4.743ms asymm  4 
 6:  no reply
 7:  no reply
 8:  no reply
 9:  no reply
10:  no reply
11:  no reply
12:  no reply
13:  no reply
14:  no reply
15:  no reply
16:  no reply
17:  no reply
18:  no reply
19:  no reply
     Too many hops: pmtu 1500
     Resume: pmtu 1500