AS39636 - ASN-AEMNET IREN ENERGIAPARFC 4890 ✓RPKI ✓ 1/1ASPA -

AS overview

Test target: 2a01:8320::1 · static prefix probe · address space: PA · prefixes announced: 1

prefix(es): 2a01:8320::/32

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

We probed 35 arbitrary IPv6 address(es) inside AS39636's announced prefix(es). No router inside the prefix responded. The deepest visible hop was 2001:7f8:23:1::19 at hop 14 - that router does not answer ICMPv6 Echo. This is not in AS39636'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 2026-09-23T12:01:49Z

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 4 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).

tracepath -6

 1?: [LOCALHOST]                        0.012ms pmtu 1500
 1:  _gateway                                              0.863ms 
 1:  _gateway                                              0.751ms 
 2:  sox-pn.sox.rs                                         0.954ms 
 3:  2001:7f8:1e:8::3d                                     0.876ms asymm  2 
 4:  ae8-930.RT.IRX.VIE.AT.retn.net                       13.575ms asymm  3 
 5:  RT.TC2.AMS.NL.retn.net                               28.968ms 
 6:  ams-ix.ipv6.itgate.net                               30.799ms 
 7:  be11.Jolly-Jumper.MIL3.ipv6.ITgate.net               39.531ms asymm  5 
 8:  2a01:8320::1                                         41.437ms 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]                        0.028ms pmtu 1500
 1:  xe-0-0-13-178.gw01.ber01.as59645.net                  0.513ms 
 1:  xe-0-0-13-178.gw01.ber01.as59645.net                  0.519ms 
 2:  ae0-2453.cr10.ber01.lwlcom.net                        1.051ms 
 3:  ae0-150.cr10.fra01.lwlcom.net                        10.262ms asymm  7 
 4:  ae0-100.cr10.fra02.lwlcom.net                        10.633ms asymm  8 
 5:  ae0-10.cr10.fra06.lwlcom.net                         10.382ms asymm  7 
 6:  ams-ix.1-ix.net                                      21.107ms asymm  8 
 7:  ams-ix.ipv6.itgate.net                               23.030ms asymm  6 
 8:  be11.Jolly-Jumper.MIL3.ipv6.ITgate.net               25.912ms 
 9:  2a01:8320::1                                         27.379ms reached
     Resume: pmtu 1500 hops 9 back 9 

From DE host (Düsseldorf)   openRFC 4890 ✓

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

Path (traceroute + mtr + PTR)

tracepath -6

 1?: [LOCALHOST]                        0.023ms pmtu 1500
 1:  xe-0-0-12-142.gw01.dus01.as59645.net                  0.525ms 
 1:  xe-0-0-12-142.gw01.dus01.as59645.net                  0.213ms 
 2:  eth1-0-12-h5594.edge5-dus1.bb.wiit.network            7.323ms 
 3:  no reply
 4:  lag11.core3-dus1.bb.wiit.network                      0.191ms 
 5:  lag8.core1-dus-ix.bb.wiit.network                     0.392ms 
 6:  de-cix.FRA.ipv6.itgate.net                            4.289ms 
 7:  be11.Jolly-Jumper.MIL3.ipv6.ITgate.net               13.046ms 
 8:  2a01:8320::1                                         15.460ms 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)

tracepath -6

 1?: [LOCALHOST]                        0.046ms pmtu 1500
 1:  2a00:8642:42::2                                       2.617ms 
 1:  2a00:8642:42::2                                       3.608ms 
 2:  no reply
 3:  ccr2-ccr1.dc1.nogalliance.org                         7.858ms asymm  2 
 4:  ams-ix.ipv6.itgate.net                               15.647ms asymm  3 
 5:  be11.Jolly-Jumper.MIL3.ipv6.ITgate.net               23.575ms asymm  4 
 6:  2a01:8320::1                                         25.481ms reached
     Resume: pmtu 1500 hops 6 back 5 

From ITA host (Karsolink)   echo onlyRFC 4890 ✓

filter likely at: destination AS39636 (ASN-AEMNET) · min PMTU on path: 1500

Path (traceroute + mtr + PTR)

tracepath -6

 1?: [LOCALHOST]                        0.029ms pmtu 1500
 1:  no reply
 2:  2a12:d8c0:109f:121::a1                                0.692ms 
 3:  2a12:d8c0:101f:6::1                                  10.086ms 
 4:  itgate.minap.it                                      11.179ms asymm  5 
 5:  be11.jolly-jumper.mil3.ipv6.itgate.net                9.743ms asymm  4 
 6:  2a01:8320::1                                         12.301ms reached
     Resume: pmtu 1500 hops 6 back 5 

From SLO host (6connect)   openRFC 4890 ✓

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

Path (traceroute + mtr + PTR)

tracepath -6

 1?: [LOCALHOST]                        0.018ms pmtu 9000
 1:  fw1-lju.6connect.com                                  0.640ms 
 1:  fw1-lju.6connect.com                                  0.580ms 
 2:  ccr-to-fw-ccr1-gw-lju.6connect.com                    1.127ms 
 3:  2a00:ee1:800:9::1                                     2.673ms 
 4:  2a00:ee0:1:15::2                                      1.683ms asymm  3 
 5:  2a00:ee0:1:10::2                                      1.567ms pmtu 1500
 5:  de-cix.FRA.ipv6.itgate.net                           15.529ms asymm  9 
 6:  be11.Jolly-Jumper.MIL3.ipv6.ITgate.net               15.001ms 
 7:  2a01:8320::1                                         17.652ms reached
     Resume: pmtu 1500 hops 7 back 8 

From SLO host (T-2)   openRFC 4890 ✓

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

Path (traceroute + mtr + PTR)

tracepath -6

 1?: [LOCALHOST]                        0.030ms pmtu 1500
 1:  2a01:261:313:b814::1                                  1.680ms 
 1:  no reply
 2:  2a01:260:1::225                                       7.164ms 
 3:  2a01-260-1-1--9c.core6.t-2.net                        2.450ms 
 4:  2a01-260-1-1--39.core6.t-2.net                        2.183ms asymm  3 
 5:  hurricane-electric.nikhef.nlsix.net                  35.541ms asymm  4 
 6:  ams-ix.ipv6.itgate.net                               32.204ms 
 7:  be11.Jolly-Jumper.MIL3.ipv6.ITgate.net               32.865ms asymm  8 
 8:  2a01:8320::1                                         36.983ms reached
     Resume: pmtu 1500 hops 8 back 9