AS49605 - DTS-AS Digital Telecommunication Services S.r.lPARFC 4890 ✓RPKI ✓ 2/2ASPA -

AS overview

Test target: 2a05:c6c0:17::221 · dns1.ivo.cloud · address space: PA · prefixes announced: 2

prefix(es): 2a02:e50::/32, 2a05:c6c0::/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 70 arbitrary IPv6 address(es) inside AS49605's announced prefix(es). No router inside the prefix responded. The deepest visible hop was 2001:470:e:dd::1 at hop 9 - that router answers ICMPv6 Echo. This is not in AS49605'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 2026-09-23T12:04:42Z

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]                        0.013ms pmtu 1500
 1:  _gateway                                              0.514ms 
 1:  _gateway                                              0.694ms 
 2:  sox-pn.sox.rs                                         0.530ms 
 3:  2001:7f8:1e:8::3d                                     0.716ms asymm  2 
 4:  ae8-930.RT.IRX.VIE.AT.retn.net                       12.913ms asymm  3 
 5:  RT.TC2.AMS.NL.retn.net                               29.114ms 
 6:  2001:7f8:1::a504:9605:1                              39.619ms asymm  5 
 7:  2a02:e50:0:10::2                                     46.090ms 
 8:  2a02:e50:0:10::18a                                   46.443ms 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
     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]                        0.024ms pmtu 1500
 1:  xe-0-0-13-178.gw01.ber01.as59645.net                  0.385ms 
 1:  xe-0-0-13-178.gw01.ber01.as59645.net                  0.365ms 
 2:  ae0-2453.cr10.ber01.lwlcom.net                        0.757ms 
 3:  ae0-150.cr10.fra01.lwlcom.net                        10.549ms asymm  7 
 4:  ae0-100.cr10.fra02.lwlcom.net                        10.756ms asymm  8 
 5:  ae0-10.cr10.fra06.lwlcom.net                         10.230ms asymm  7 
 6:  ams-ix.1-ix.net                                      20.714ms asymm  8 
 7:  2001:7f8:1::a504:9605:1                              26.987ms asymm 11 
 8:  2a02:e50:0:10::2                                     33.142ms asymm 13 
 9:  2a02:e50:0:10::18a                                   33.386ms asymm 13 
10:  no reply
11:  no reply
12:  no reply
13:  no reply
14:  no reply
15:  no reply
16:  no reply
17:  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]                        0.014ms pmtu 1500
 1:  xe-0-0-12-142.gw01.dus01.as59645.net                  0.350ms 
 1:  xe-0-0-12-142.gw01.dus01.as59645.net                  0.266ms 
 2:  eth1-0-12-h5594.edge5-dus1.bb.wiit.network            1.585ms 
 3:  no reply
 4:  lag11.core3-dus1.bb.wiit.network                      0.406ms 
 5:  lag2.core2-dus3.bb.wiit.network                       0.412ms asymm  4 
 6:  lag0-vl1002.core1-ams-eq3.bb.wiit.network             3.352ms asymm  5 
 7:  2001:7f8:1::a504:9605:1                              17.778ms asymm 10 
 8:  2a02:e50:0:10::2                                     23.915ms asymm 12 
 9:  2a02:e50:0:10::18a                                   24.269ms asymm 12 
10:  no reply
11:  no reply
12:  no reply
13:  no reply
14:  no reply
15:  no reply
16:  no reply
17:  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 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).

tracepath -6

 1?: [LOCALHOST]                        0.035ms pmtu 1500
 1:  2a00:8642:42::2                                       1.908ms 
 1:  2a00:8642:42::2                                       2.976ms 
 2:  gw.friends.steffann.nl                                4.236ms 
 3:  ccr2-ccr1.dc1.nogalliance.org                         2.590ms asymm  2 
 4:  2001:7f8:1::a504:9605:1                              23.072ms asymm  5 
 5:  2a02:e50:0:10::2                                     34.591ms asymm  7 
 6:  2a02:e50:0:10::18a                                   29.826ms asymm  7 
 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
     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 3 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).

tracepath -6

 1?: [LOCALHOST]                        0.053ms pmtu 1500
 1:  no reply
 2:  2a12:d8c0:109f:121::a1                                1.491ms 
 3:  2a12:d8c0:101f:103::1                                 9.087ms 
 4:  dts-v6.mix-it.net                                    10.062ms 
 5:  2a02:e50:0:10::2                                     17.018ms asymm  6 
 6:  2a02:e50:0:10::18a                                   16.365ms 
 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
     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]                        0.020ms pmtu 9000
 1:  fw1-lju.6connect.com                                  0.594ms 
 1:  fw1-lju.6connect.com                                  0.503ms 
 2:  ccr-to-fw-ccr1-gw-lju.6connect.com                    0.988ms 
 3:  2a03:a100:0:201:1::1                                  1.084ms 
 4:  2a03:a100:0:201:1::1                                  1.015ms pmtu 1500
 4:  e0-1.core1.lju1.he.net                                1.899ms 
 5:  no reply
 6:  port-channel1.core1.zag2.he.net                       4.254ms 
 7:  no reply
 8:  dts-v6.mix-it.net                                    12.375ms 
 9:  2a02:e50:0:10::2                                     19.031ms asymm 10 
10:  2a02:e50:0:10::18a                                   19.261ms 
11:  no reply
12:  no reply
13:  no reply
14:  no reply
15:  no reply
16:  no reply
17:  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 7 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).

tracepath -6

 1?: [LOCALHOST]                        0.028ms pmtu 1500
 1:  no reply
 2:  2a01:260:1::225                                       3.052ms 
 3:  2a01-260-1-1--9c.core6.t-2.net                        3.011ms 
 4:  hurricane-electric.nikhef.nlsix.net                  40.201ms 
 5:  hurricane-electric.nikhef.nlsix.net                  41.697ms asymm  4 
 6:  be1.core2.fra2.he.net                                42.890ms asymm  5 
 7:  be10.core1.zrh2.he.net                               56.600ms asymm  8 
 8:  be10.core1.zrh2.he.net                               53.718ms 
 9:  be1.core1.mil2.he.net                                41.107ms asymm  7 
10:  ivo.minap.it                                         37.380ms asymm  7 
11:  2a02:e50:0:10::2                                     44.311ms asymm  9 
12:  2a02:e50:0:10::18a                                   37.809ms asymm  9 
13:  2a02:e50:0:10::18a                                   39.802ms asymm  9 
14:  no reply
15:  no reply
16:  no reply
17:  no reply
     Too many hops: pmtu 1500
     Resume: pmtu 1500