AS44241 - INFRANET-AS InfranetPARPKI ✓ 1/1ASPA -

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IPv6 prefix announced, but nothing inside is responding yet. AS44241 announces 1 IPv6 prefix(es) to the global routing table - that’s the part that BGP and our route-server scrape confirm. But our active discovery (curated hostnames, holder-derived domains, authoritative DNS NS/SOA/MX, certificate-transparency hostnames, RIPE Atlas, RDAP, IPv6 Hitlist) found no ICMPv6-responsive host inside the prefix on either vantage, and a yarrp pass against random addresses inside the prefix produced zero in-prefix hops (no router on the path through the AS replied with Time-Exceeded for any random target). That combination usually means the announcement is configured but the addresses inside aren’t in active use yet. The BGP route is there; the operational deployment is still ahead.

AS overview

Test target: 2a0a:cc40::1 · (no live host found) · address space: PA · prefixes announced: 1

prefix(es): 2a0a:cc40::/29

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

Not an MIX-IT / NAMEX / MINAP / TOP-IX / VSIX / EQUINIX-MILAN / BGPX-ROME / NAMEX-BARI / PCIX / DECIX-PALERMO member, but our traceroute path crosses the MIX-IT / NAMEX / MINAP / TOP-IX / VSIX / EQUINIX-MILAN / BGPX-ROME / NAMEX-BARI / PCIX / DECIX-PALERMO LAN from SLO host (6connect) - reached via an MIX-IT / NAMEX / MINAP / TOP-IX / VSIX / EQUINIX-MILAN / BGPX-ROME / NAMEX-BARI / PCIX / DECIX-PALERMO-resident transit operator.

RPKI & ASPA

1 of 1 prefix(es) covered by a valid ROA.

PrefixRPKI stateReasonCovering VRP(s)
2a0a:cc40::/29✓ validmatched VRP (correct origin, length within maxLength)AS44241 /29 maxLen 29 (ripe)

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

We probed 15 arbitrary IPv6 address(es) inside AS44241's announced prefix(es). No router inside the prefix responded. The deepest visible hop was 2a02:2058:fe:2::b at hop 8 - that router answers ICMPv6 Echo. This is not in AS44241'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 active test inconclusive: no Echo Reply to 1300-byte probe.
method: ICMPv6 Echo + forged PTB, tested 2026-05-25T12:35:22Z

Failure detail — what to grep in your logs
vantageour sourceyour targetmethodresulttested (UTC)
go6lab2a00:8642:42::752a0a:cc40::1icmp6-echono_echo2026-05-25T12:35:22Z
karsolink2a12:d8c0:105a:9001::a1542a0a:cc40::1icmp6-echono_echo2026-05-25T12:46:04Z
odin2607:fae0:a000::422a0a:cc40::1icmp6-echono_echo2026-05-25T12:34:56Z

Attempt log (go6lab):

  1. icmp6-echo → no_echo: no Echo Reply to 1300-byte probe
  2. dns-tcp → no_tcp: connect failed: timed out
  3. tls → no_tcp: TLS connect failed
  4. http → no_tcp: tcp/80 not open

Attempt log (karsolink):

  1. icmp6-echo → no_echo: no Echo Reply to 1300-byte probe
  2. dns-tcp → no_tcp: connect failed: timed out
  3. tls → no_tcp: TLS connect failed
  4. http → no_tcp: tcp/80 not open

Attempt log (odin):

  1. icmp6-echo → no_echo: no Echo Reply to 1300-byte probe
  2. dns-tcp → no_tcp: connect failed: timed out
  3. tls → no_tcp: TLS connect failed
  4. http → no_tcp: tcp/80 not open

To match the corresponding ICMPv6 packet on your side (host firewall, AS edge, or transit tap), look for our PTBs around the timestamps above:

sudo tcpdump -i any -n -e 'icmp6 and ip6[40] = 2 and (src host 2607:fae0:a000::42 or src host 2a00:8642:42::75 or src host 2a12:d8c0:105a:9001::a154)'

If you see our PTBs arriving but the destination's TCP/Echo flow does not shrink, the drop is in the destination kernel (cause 3 below). If you don't see them at all, drop is upstream of you (cause 2). If you only see them from one of our two source IPs, the drop is path-asymmetric — one transit on the asymmetric route is filtering, the other is not.

From NL host (go6lab)   transit only unreachable

filter likely at: past AS44512 (KONVERTO-AS) · min PMTU on path: 1500

0/4
Echo small (56B) -
0/4
Echo 1500B (DF) -
no
Type 1 dest-unreach
-
TCP responds on

Path (traceroute + mtr + PTR)

#IP / PTRRTTmtr lossASAS holder
12a00:8642:42::31.6ms0%AS203993STEFFANN-DC-AS - S.J.M. Steffann, NL
2gw.friends.steffann.nl
2a00:8642:1000:f000::1		2.6ms0%*AS203993STEFFANN-DC-AS - S.J.M. Steffann, NL
32a00:1ca8:1::1943.3ms0%AS50673Serverius-as - Serverius Holding B.V., NL
42a03:3f40::10:335.3ms0%AS50673Serverius-as - Serverius Holding B.V., NL
52001:7f8:1::a501:2874:121.0ms10%-NA
62001:b00:1:1:3::13121.0ms0%AS12874FASTWEB - Fastweb SpA, IT
72001:b00:1:1:3::14522.2ms0%AS12874FASTWEB - Fastweb SpA, IT
82a02:2058:2:1::a28.7ms0%AS44512KONVERTO-AS - KONVERTO SPA, IT
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Rate-limited ICMPv6: hop 5 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).

tracepath -6

 1?: [LOCALHOST]                        0.033ms pmtu 1500
 1:  2a00:8642:42::3                                       1.791ms 
 1:  2a00:8642:42::3                                       1.607ms 
 2:  no reply
 3:  2a00:1ca8:1::194                                      2.889ms 
 4:  2a03:3f40::10:33                                      6.014ms 
 5:  2001:7f8:1::a501:2874:1                              21.657ms 
 6:  2001:b00:1:1:3::133                                  21.870ms 
 7:  2001:b00:1:1:3::145                                  22.174ms 
 8:  2a02:2058:2:1::a                                     28.641ms asymm  5 
 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
22:  no reply
23:  no reply
24:  no reply
     Too many hops: pmtu 1500
     Resume: pmtu 1500

From ITA host (Karsolink)   transit only unreachable

filter likely at: past AS44512 (KONVERTO-AS) · min PMTU on path: 1500

0/4
Echo small (56B) -
0/4
Echo 1500B (DF) -
no
Type 1 dest-unreach
-
TCP responds on

Path (traceroute + mtr + PTR)

#IP / PTRRTTmtr lossASAS holder
1*-0%*-
2*---
32a12:d8c0:101f:6::110.0ms0%AS204471KARSOLINK - 2S Computers SRL, IT
4fastweb.minap.it
2001:7f8:c5::a501:2874:1		10.9ms90%AS12874Fastweb S.p.A.
52001:b00:1:1:1::1af9.6ms0%AS12874FASTWEB - Fastweb SpA, IT
62001:b00:1:1:3::14710.1ms0%AS12874FASTWEB - Fastweb SpA, IT
72a02:2058:2:1::a14.5ms0%AS44512KONVERTO-AS - KONVERTO SPA, IT
8*---
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Rate-limited ICMPv6: hop 4 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).

tracepath -6

 1?: [LOCALHOST]                        0.032ms pmtu 1500
 1:  karsolink-01.net.karsolink.com                        0.736ms 
 1:  karsolink-01.net.karsolink.com                        0.750ms 
 2:  2a12:d8c0:109f:121::a1                                1.005ms 
 3:  2a12:d8c0:101f:6::1                                  10.529ms 
 4:  no reply
 5:  2001:b00:1:1:1::1af                                  10.181ms 
 6:  2001:b00:1:1:3::147                                  10.719ms 
 7:  2a02:2058:2:1::a                                     14.977ms asymm  5 
 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
18:  no reply
19:  no reply
20:  no reply
21:  no reply
22:  no reply
23:  no reply
24:  no reply
     Too many hops: pmtu 1500
     Resume: pmtu 1500

From SLO host (6connect)   transit only unreachable

filter likely at: past AS44512 (KONVERTO-AS) · min PMTU on path: 1500

0/4
Echo small (56B) -
0/4
Echo 1500B (DF) -
no
Type 1 dest-unreach
-
TCP responds on

Path (traceroute + mtr + PTR)

#IP / PTRRTTmtr lossASAS holder
1fw1-lju.6connect.com
2607:fae0:a000::2		0.4ms0%*AS80386CONNECT - 6connect, Inc., US
2*-0%*-
3*-60%-
42a00:ee0:1:15::21.0ms0%AS5603SIOL-NET - Telekom Slovenije, d.d., SI
52a11:4142:20021.0ms0%-
62620:107:4008:e85::28.0ms0%-NA
7konverto-AS44512-v6.mix-it.net @MIX-IT / NAMEX / MINAP / TOP-IX / VSIX / EQUINIX-MILAN / BGPX-ROME / NAMEX-BARI / PCIX / DECIX-PALERMO
2001:7f8:b:100:1d1:a5d4:4512:108		10.8ms0%-NA
82a02:2058:fe:2::b14.9ms0%AS44512KONVERTO-AS - KONVERTO SPA, IT
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Rate-limited ICMPv6: hop 3 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).

tracepath -6

 1?: [LOCALHOST]                        0.026ms pmtu 1500
 1:  fw1-lju.6connect.com                                  0.530ms 
 1:  fw1-lju.6connect.com                                  0.498ms 
 2:  no reply
 3:  2a00:ee1:800:9::1                                     2.151ms 
 4:  2a00:ee0:1:15::2                                      1.311ms asymm  3 
 5:  2a11:4142:2002::                                      1.178ms asymm  6 
 6:  2620:107:4008:e85::2                                  8.041ms asymm  7 
 7:  konverto-AS44512-v6.mix-it.net                       10.955ms asymm  8 
 8:  2a02:2058:fe:2::b                                    14.910ms asymm  9 
 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
22:  no reply
23:  no reply
24:  no reply
     Too many hops: pmtu 1500
     Resume: pmtu 1500