AS206298 - RKM-AS RKM Regional Kabel TV Moelltal und TelekommunikationPARFC 4890 ✓RPKI ✓ 1/1ASPA -

AS overview

Test target: 2a0a:5c0:20::4 · ns1.peak.at · address space: PA · prefixes announced: 1

prefix(es): 2a0a:5c0::/29

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

We probed 35 arbitrary IPv6 address(es) inside AS206298's announced prefix(es). No router inside the prefix responded. The deepest visible hop was 2a04:5080:a:200:78:142:83:3 at hop 21 - that router answers ICMPv6 Echo. This is not in AS206298'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 2026-09-23T13:36:21Z

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)

tracepath -6

 1?: [LOCALHOST]                        0.013ms pmtu 1500
 1:  _gateway                                              0.564ms 
 1:  _gateway                                              0.328ms 
 2:  sox-pn.sox.rs                                         0.449ms 
 3:  2001:7f8:1e:8::3d                                     0.836ms asymm  2 
 4:  ae8-930.RT.IRX.VIE.AT.retn.net                       12.734ms asymm  3 
 5:  GW-AS8075.retn.net                                   14.494ms asymm  4 
 6:  2a0b:6c40:0:921:185:211:216:158                      33.396ms asymm  5 
 7:  2a0b:6c40:2:939:185:211:219:187                      32.130ms asymm  6 
 8:  2a04:5080:a:200:78:142:83:3                          33.229ms 
 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
20:  no reply
21:  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)

Rate-limited ICMPv6: hop 13 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).

tracepath -6

 1?: [LOCALHOST]                        0.021ms pmtu 1500
 1:  xe-0-0-13-178.gw01.ber01.as59645.net                  0.500ms 
 1:  xe-0-0-13-178.gw01.ber01.as59645.net                  0.564ms 
 2:  ae0-2453.cr10.ber01.lwlcom.net                        1.318ms 
 3:  ae3-90.cr10.ham01.lwlcom.net                          5.166ms 
 4:  ae0-50.cr11.ham01.lwlcom.net                          5.140ms 
 5:  2a00:c380:f000::4b                                    5.637ms asymm  4 
 6:  ae4-2087.dus10.core-backbone.com                     11.892ms asymm  5 
 7:  ae43-2026.fra30.core-backbone.com                    11.467ms asymm  5 
 8:  ae16-2123.fra40.core-backbone.com                    11.646ms asymm  6 
 9:  ae8-2027.muc10.core-backbone.com                     15.822ms asymm  8 
10:  ae1-2030.muc20.core-backbone.com                     15.532ms asymm  7 
11:  ae1-2028.vie10.core-backbone.com                     21.170ms asymm  8 
12:  no reply
13:  2a02:940::1000:0:0:8                                 26.088ms asymm  6 
14:  2a02:940::1:51                                       31.456ms asymm 12 
15:  2a04:5080:a:200:78:142:83:3                          34.194ms asymm 14 
16:  no reply
17:  no reply
18:  no reply
19:  no reply
20:  no reply
21:  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]                        0.027ms pmtu 1500
 1:  xe-0-0-12-142.gw01.dus01.as59645.net                  0.372ms 
 1:  xe-0-0-12-142.gw01.dus01.as59645.net                  0.321ms 
 2:  eth1-0-12-h5594.edge5-dus1.bb.wiit.network            1.352ms 
 3:  no reply
 4:  lag11.core3-dus1.bb.wiit.network                      0.455ms 
 5:  lag8.core1-dus-ix.bb.wiit.network                     0.512ms 
 6:  de-cix.fra.ama-networx.net                            4.226ms 
 7:  2a0b:6c40:0:123:185:211:216:49                       15.218ms asymm  9 
 8:  2a0b:6c40:0:921:185:211:216:158                      19.480ms asymm 10 
 9:  2a04:5080:a:200:78:142:83:3                          21.400ms asymm 13 
10:  2a04:5080:a:200:78:142:83:3                          23.920ms asymm 13 
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
20:  no reply
21:  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 5, hop 6 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).

tracepath -6

 1?: [LOCALHOST]                        0.034ms pmtu 1500
 1:  2a00:8642:42::2                                       1.603ms 
 1:  2a00:8642:42::2                                       1.450ms 
 2:  gw.friends.steffann.nl                                2.479ms 
 3:  2a00:1ca8:1::194                                      3.532ms 
 4:  2a03:3f40::10:33                                      5.422ms 
 5:  ams.fra.corou0010.v6.as21013.net                     24.418ms asymm  8 
 6:  no reply
 7:  2a02:940::1:51                                       28.469ms asymm  9 
 8:  2a04:5080:a:200:78:142:83:3                          30.263ms asymm 11 
 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
20:  no reply
21:  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 7, hop 10 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).

tracepath -6

 1?: [LOCALHOST]                        0.031ms pmtu 1500
 1:  no reply
 2:  no reply
 3:  2a12:d8c0:101f:6::1                                  10.198ms 
 4:  zayo-AS6461.mix-it.net                                9.045ms 
 5:  be47.core1.mil2.he.net                               13.204ms 
 6:  be1.core1.zrh2.he.net                                15.509ms 
 7:  be10.core4.fra1.he.net                               19.838ms 
 8:  2a00:16f8:11::7ce                                    23.195ms asymm  7 
 9:  2a02:940::1:51                                       27.302ms asymm  8 
10:  2a04:5080:a:200:78:142:83:3                          43.570ms asymm 11 
11:  2a02:940::1:51                                       26.029ms asymm  8 
12:  2a04:5080:a:200:78:142:83:3                          43.232ms asymm 11 
13:  no reply
14:  no reply
15:  no reply
16:  no reply
17:  no reply
18:  no reply
19:  no reply
20:  no reply
21:  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)

tracepath -6

 1?: [LOCALHOST]                        0.022ms pmtu 9000
 1:  fw1-lju.6connect.com                                  0.536ms 
 1:  fw1-lju.6connect.com                                  0.496ms 
 2:  no reply
 3:  2a00:ee1:800:9::1                                     2.063ms 
 4:  2a00:ee0:1:15::2                                      1.433ms asymm  3 
 5:  2a00:ee0:1:10::2                                     59.662ms pmtu 1500
 5:  de-cix.fra.ama-networx.net                           14.458ms asymm  9 
 6:  2a0b:6c40:0:123:185:211:216:49                       16.280ms 
 7:  2a0b:6c40:0:921:185:211:216:158                      21.030ms 
 8:  2a0b:6c40:2:939:185:211:219:187                      22.418ms 
 9:  2a04:5080:a:200:78:142:83:3                          25.341ms 
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
20:  no reply
21:  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 6 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).

tracepath -6

 1?: [LOCALHOST]                        0.035ms pmtu 1500
 1:  2a01:261:313:b814::1                                  0.944ms 
 1:  2a01:261:313:b814::1                                  0.901ms 
 2:  2a01:260:1::225                                       2.918ms 
 3:  2a01-260-1-1--9a.core6.t-2.net                        3.321ms 
 4:  2a01-260-1-1--38.core6.t-2.net                        2.491ms asymm  3 
 5:  100ge0-0-0-31.core1.vie1.he.net                      11.289ms 
 6:  2001:470:26b::2                                      10.309ms 
 7:  2a0b:6c40:0:921:185:211:216:158                      14.775ms 
 8:  2a0b:6c40:2:939:185:211:219:187                      16.806ms asymm  9 
 9:  2a04:5080:a:200:78:142:83:3                          18.223ms 
10:  2a04:5080:a:200:78:142:83:3                          19.168ms asymm  9 
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
20:  no reply
21:  no reply
     Too many hops: pmtu 1500
     Resume: pmtu 1500