AS208920 - RocketWay-AS Rocket Way S.R.LPARFC 4890 ✓RPKI ✓ 1/1ASPA -

AS overview

Test target: 2a06:c100::1 · static prefix probe · address space: PA · prefixes announced: 1

prefix(es): 2a06:c100::/29

MIX-IT / NAMEX / MINAP / TOP-IX / VSIX / EQUINIX-MILAN / BGPX-ROME / NAMEX-BARI / PCIX / DECIX-PALERMO peering

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

We probed 35 arbitrary IPv6 address(es) inside AS208920'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 AS208920'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 2026-09-23T12:05:08Z

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]                        0.015ms pmtu 1500
 1:  _gateway                                              0.546ms 
 1:  _gateway                                              0.526ms 
 2:  sox-pn.sox.rs                                         0.379ms 
 3:  2001:7f8:1e:8::3d                                     0.680ms asymm  2 
 4:  ae8-930.RT.IRX.VIE.AT.retn.net                       20.943ms asymm  3 
 5:  RT.MIX.MIL.IT.retn.net                               28.668ms asymm  4 
 6:  GW-AS20912.retn.net                                  28.793ms asymm  5 
 7:  2a0f:e880:0:106::2                                   28.581ms asymm  5 
 8:  2a06:c100::1                                         28.935ms reached
     Resume: pmtu 1500 hops 8 back 6 

From DE host (Berlin)   openRFC 4890 ✓

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

Path (traceroute + mtr + PTR)

tracepath -6

 1?: [LOCALHOST]                        0.026ms pmtu 1500
 1:  xe-0-0-13-178.gw01.ber01.as59645.net                  0.546ms 
 1:  xe-0-0-13-178.gw01.ber01.as59645.net                  0.535ms 
 2:  ae0-2453.cr10.ber01.lwlcom.net                        0.807ms 
 3:  retn.bcix.de                                         10.721ms asymm  5 
 4:  RT.MIX.MIL.IT.retn.net                               19.613ms asymm  5 
 5:  GW-AS5398.retn.net                                   19.413ms asymm 11 
 6:  as208920-a-ge.customer.ipv6.panservice.it            19.541ms asymm 11 
 7:  2a06:c100::1                                         19.370ms reached
     Resume: pmtu 1500 hops 7 back 12 

From DE host (Düsseldorf)   openRFC 4890 ✓

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

Path (traceroute + mtr + PTR)

tracepath -6

 1?: [LOCALHOST]                        0.018ms pmtu 1500
 1:  xe-0-0-12-142.gw01.dus01.as59645.net                  0.270ms 
 1:  xe-0-0-12-142.gw01.dus01.as59645.net                  0.197ms 
 2:  eth1-0-12-h5594.edge5-dus1.bb.wiit.network            1.242ms 
 3:  no reply
 4:  lag30.core3-dus1.bb.wiit.network                      0.412ms 
 5:  lag0-vl1011.core1-fra-ix.bb.wiit.network              4.553ms 
 6:  lag0-vl1001.core1-nbg-ncd.bb.wiit.network             7.138ms 
 7:  lag0-vl6.core2-nbg-ncd.bb.wiit.network                7.023ms 
 8:  lag0-vl1006.core2-muc2.bb.wiit.network                9.744ms 
 9:  lag0-vl1009.core1-muc-eq3.bb.wiit.network            10.059ms 
10:  lag0-vl1001.core1-pda-vsix.bb.wiit.network           20.362ms 
11:  lag0-vl1001.core1-mil-mix.bb.wiit.network            20.532ms asymm  9 
12:  rocketway-v6.mix-it.net                              20.235ms asymm 10 
13:  2a06:c100::1                                         20.653ms reached
     Resume: pmtu 1500 hops 13 back 11 

From NL host (go6lab)   openRFC 4890 ✓

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

Path (traceroute + mtr + PTR)

tracepath -6

 1?: [LOCALHOST]                        0.035ms pmtu 1500
 1:  2a00:8642:42::2                                       2.832ms 
 1:  2a00:8642:42::2                                       2.771ms 
 2:  gw.friends.steffann.nl                                3.011ms 
 3:  2a00:1ca8:1::194                                      9.944ms 
 4:  2a03:3f40::10:33                                      7.677ms 
 5:  ams-ix.retn.net                                       7.101ms asymm  7 
 6:  RT.MIX.MIL.IT.retn.net                               21.291ms 
 7:  GW-AS5398.retn.net                                   24.776ms 
 8:  as208920-a-ge.customer.ipv6.panservice.it            18.824ms asymm  9 
 9:  2a06:c100::1                                         21.617ms reached
     Resume: pmtu 1500 hops 9 back 10 

From ITA host (Karsolink)   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]                        0.035ms pmtu 1500
 1:  no reply
 2:  no reply
 3:  no reply
 4:  2001:7f8:b9::14:1                                    11.907ms 
 5:  100ge-0-1-55.rr1.mil01.core.ipv6.panservice.it       11.104ms 
 6:  as208920-a-ge.customer.ipv6.panservice.it             9.090ms asymm  4 
 7:  2a06:c100::1                                          9.658ms reached
     Resume: pmtu 1500 hops 7 back 5 

From SLO host (6connect)   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]                        0.017ms pmtu 9000
 1:  fw1-lju.6connect.com                                  0.597ms 
 1:  fw1-lju.6connect.com                                  0.472ms 
 2:  no reply
 3:  2a00:ee1:800:9::1                                     3.849ms 
 4:  2a00:ee0:1:10::2                                      1.138ms asymm  3 
 5:  2a00:ee0:1:15::2                                      1.515ms pmtu 1500
 5:  2a11:4142:2002::                                      1.186ms asymm  6 
 6:  2620:107:4008:e85::2                                  8.273ms asymm  7 
 7:  rocketway-v6.mix-it.net                              10.468ms asymm  8 
 8:  2a06:c100::1                                         10.939ms reached
     Resume: pmtu 1500 hops 8 back 9 

From SLO host (T-2)   openRFC 4890 ✓

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

Path (traceroute + mtr + PTR)

tracepath -6

 1?: [LOCALHOST]                        0.018ms pmtu 1500
 1:  2a01:261:313:b814::1                                  0.911ms 
 1:  2a01:261:313:b814::1                                  1.116ms 
 2:  2a01:260:1::225                                       2.256ms 
 3:  2a01-260-1-1--9c.core6.t-2.net                        2.773ms 
 4:  no reply
 5:  port-channel1.core1.zag2.he.net                      10.134ms asymm  7 
 6:  port-channel1.core1.zag2.he.net                      11.544ms asymm  7 
 7:  panservice-v6.mix-it.net                             17.224ms 
 8:  as208920-a-ge.customer.ipv6.panservice.it            16.949ms asymm  7 
 9:  as208920-a-ge.customer.ipv6.panservice.it           210.008ms asymm  7 
10:  2a06:c100::1                                         17.431ms reached
     Resume: pmtu 1500 hops 10 back 8