AS49924 - Netfree NETFREE S.R.L.SPARFC 4890 ✓RPKI ✓ 1/1ASPA -

AS overview

Test target: 2a06:be40::1 · static prefix probe · address space: PA · prefixes announced: 1

prefix(es): 2a06:be40::/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 AS49924's announced prefix(es). No router inside the prefix responded. The deepest visible hop was 2001:b00:1:1:2::db at hop 18 - that router does not answer ICMPv6 Echo. This is not in AS49924'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)

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

tracepath -6

 1?: [LOCALHOST]                        0.014ms pmtu 1500
 1:  _gateway                                              0.632ms 
 1:  _gateway                                              0.582ms 
 2:  sox-pn.sox.rs                                         0.608ms 
 3:  2001:7f8:1e:8::3d                                     0.669ms asymm  2 
 4:  ae8-930.RT.IRX.VIE.AT.retn.net                       12.813ms asymm  3 
 5:  RT.MIX.MIL.IT.retn.net                               46.546ms asymm  4 
 6:  no reply
 7:  2001:b00:1:1:3::12d                                  28.968ms asymm  6 
 8:  2001:b00:1:1:2::ab                                   44.086ms asymm  7 
 9:  no reply
10:  2a06:be40::1                                         48.743ms reached
     Resume: pmtu 1500 hops 10 back 9 

From DE host (Berlin)   openRFC 4890 ✓

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

Path (traceroute + mtr + PTR)

Rate-limited ICMPv6: hop 15 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).

tracepath -6

 1?: [LOCALHOST]                        0.025ms pmtu 1500
 1:  xe-0-0-13-178.gw01.ber01.as59645.net                  0.512ms 
 1:  xe-0-0-13-178.gw01.ber01.as59645.net                  0.611ms 
 2:  ae0-2453.cr10.ber01.lwlcom.net                       31.165ms 
 3:  ae0-10.cr10.ber03.lwlcom.net                          1.125ms 
 4:  ae0-15.cr11.dtm01.lwlcom.net                          8.649ms asymm  5 
 5:  ae0-10.cr10.dtm02.lwlcom.net                          9.044ms asymm  6 
 6:  ae0-20.cr10.dus04.lwlcom.net                          8.985ms asymm  5 
 7:  ae0-20.cr10.dus01.lwlcom.net                          9.125ms asymm  4 
 8:  ae0-90.cr11.dus01.lwlcom.net                          8.820ms asymm  5 
 9:  as3303.dusseldorf.megaport.com                       17.914ms asymm 13 
10:  i00ffm-005-loo179.bb.ip-plus.net                     18.197ms asymm 12 
11:  i62bsw-015-loo179.ip6.ip-plus.net                    18.114ms asymm 14 
12:  i73olt-005-loo179.bb.ip-plus.net                     17.749ms 
13:  i71lzf-015-loo179.bb.ip-plus.net                     18.086ms asymm 12 
14:  i63bel-005-loo179.bb.ip-plus.net                     20.376ms asymm 13 
15:  no reply
16:  2001:b00:1:1:1::1af                                  23.300ms asymm  8 
17:  2001:b00:1:1:3::d7                                   34.708ms asymm  9 
18:  no reply
19:  2a06:be40::1                                         43.971ms reached
     Resume: pmtu 1500 hops 19 back 11 

From DE host (Düsseldorf)   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]                        0.021ms pmtu 1500
 1:  xe-0-0-12-142.gw01.dus01.as59645.net                  0.323ms 
 1:  xe-0-0-12-142.gw01.dus01.as59645.net                  0.310ms 
 2:  eth1-0-12-h5594.edge5-dus1.bb.wiit.network            1.191ms 
 3:  no reply
 4:  lag30.core3-dus1.bb.wiit.network                      0.370ms 
 5:  lag8.core1-dus-ix.bb.wiit.network                     0.515ms 
 6:  mi-caracciolo-ir001.fastweb.it                       29.998ms 
 7:  2001:b00:1:1:1::1b5                                  17.439ms 
 8:  2001:b00:1:1:2::ab                                   28.963ms 
 9:  no reply
10:  2a06:be40::1                                         37.113ms reached
     Resume: pmtu 1500 hops 10 back 10 

From NL host (go6lab)   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]                        0.038ms pmtu 1500
 1:  2a00:8642:42::2                                       3.695ms 
 1:  2a00:8642:42::2                                       2.662ms 
 2:  no reply
 3:  2a00:1ca8:1::194                                      6.007ms 
 4:  2a03:3f40::10:33                                      8.960ms 
 5:  2001:7f8:1::a501:2874:1                              27.824ms 
 6:  2001:b00:1:1:3::131                                  24.014ms 
 7:  2001:b00:1:1:2::ab                                   40.886ms 
 8:  no reply
 9:  2a06:be40::1                                         41.894ms reached
     Resume: pmtu 1500 hops 9 back 9 

From ITA host (Karsolink)   openRFC 4890 ✓

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

Path (traceroute + mtr + PTR)

Rate-limited ICMPv6: hop 4, hop 7 (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:  no reply
 4:  fastweb-v6.mix-it.net                                10.505ms 
 5:  2001:b00:1:1:1::1af                                   9.955ms 
 6:  2001:b00:1:1:2::ab                                   20.486ms 
 7:  no reply
 8:  2a06:be40::1                                         26.049ms reached
     Resume: pmtu 1500 hops 8 back 8 

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 7, hop 8, hop 9, hop 10, hop 13 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).

tracepath -6

 1?: [LOCALHOST]                        0.025ms pmtu 9000
 1:  fw1-lju.6connect.com                                  0.806ms 
 1:  fw1-lju.6connect.com                                  0.695ms 
 2:  no reply
 3:  2a03:a100:0:201:1::1                                  0.961ms 
 4:  2a03:a100:0:201:1::1                                  1.013ms pmtu 1500
 4:  e0-1.core1.lju1.he.net                                2.413ms 
 5:  100ge0-0-0-5.core1.vie1.he.net                        9.930ms 
 6:  be3.core1.prg1.he.net                                14.195ms 
 7:  no reply
 8:  be2.core3.ams1.he.net                                25.457ms 
 9:  be3.core4.lon2.he.net                                29.535ms 
10:  2001:7f8:4::324a:1                                   45.957ms asymm 11 
11:  2001:b00:1:1:3::133                                  30.716ms asymm  9 
12:  2001:b00:1:1:3::d7                                   40.117ms asymm 10 
13:  2001:b00:1:1:2::db                                   42.853ms asymm 11 
14:  2a06:be40::1                                         50.978ms reached
     Resume: pmtu 1500 hops 14 back 12 

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, hop 8, hop 9, hop 12 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).

tracepath -6

 1?: [LOCALHOST]                        0.030ms pmtu 1500
 1:  no reply
 2:  2a01:260:1::225                                       3.913ms 
 3:  2a01-260-1-1--9a.core6.t-2.net                        3.559ms 
 4:  hurricane-electric.nikhef.nlsix.net                  33.895ms 
 5:  no reply
 6:  be47.core3.ams1.he.net                               33.851ms 
 7:  be47.core3.ams1.he.net                               32.369ms asymm  6 
 8:  be3.core4.lon2.he.net                                44.212ms asymm  6 
 9:  2001:b00:1:1:3::133                                  44.291ms asymm  8 
10:  2001:b00:1:1:3::d7                                   49.419ms asymm  9 
11:  2001:b00:1:1:3::d7                                   48.133ms asymm  9 
12:  2a06:be40::1                                         54.574ms reached
     Resume: pmtu 1500 hops 12 back 11