AS202017 ASMVIG-AS ASM VIGEVANO E LOMELLINA SPA

IPv6 prefix announced, but nothing inside is responding yet. AS202017 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: 2a02:52a0::1 · (no live host found) · address space: PA · prefixes announced: 1

prefix(es): 2a02:52a0::/32

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 NL host (go6lab), ITA host (Karsolink), 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

0 of 1 prefix(es) covered by a valid ROA, 1 not-found.

Prefix	RPKI state	Reason	Covering VRP(s)
`2a02:52a0::/32`	- not-found	no covering VRP

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

We probed 15 arbitrary IPv6 address(es) inside AS202017's announced prefix(es). No router inside the prefix responded. The deepest visible hop was 2a02:b011:2ffc::1 at hop 24 - that router answers ICMPv6 Echo. This is not in AS202017'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 2026-05-25T12:31:39Z

Failure detail — what to grep in your logs

vantage	our source	your target	method	result	tested (UTC)
go6lab	`2a00:8642:42::75`	`2a02:52a0::1`	`icmp6-echo`	no_echo	2026-05-25T12:31:39Z
karsolink	`2a12:d8c0:105a:9001::a154`	`2a02:52a0::1`	`icmp6-echo`	no_echo	2026-05-25T12:39:23Z
odin	`2607:fae0:a000::42`	`2a02:52a0::1`	`icmp6-echo`	no_echo	2026-05-25T12:31:24Z

Attempt log (go6lab):

icmp6-echo → no_echo: no Echo Reply to 1300-byte probe
dns-tcp → no_tcp: connect failed: [Errno 101] Network is unreachable
tls → no_tcp: TLS connect failed
http → no_tcp: tcp/80 not open

Attempt log (karsolink):

icmp6-echo → no_echo: no Echo Reply to 1300-byte probe
dns-tcp → no_tcp: connect failed: [Errno 101] Network is unreachable
tls → no_tcp: TLS connect failed
http → no_tcp: tcp/80 not open

Attempt log (odin):

icmp6-echo → no_echo: no Echo Reply to 1300-byte probe
dns-tcp → no_tcp: connect failed: [Errno 101] Network is unreachable
tls → no_tcp: TLS connect failed
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 AS1267 (ASN-WINDTRE) · min PMTU on path: 1500

0/4

Echo small (56B) -

0/4

Echo 1500B (DF) -

Type 1 dest-unreach

TCP responds on

Path (traceroute + mtr + PTR)

#	IP / PTR	RTT	mtr loss	AS	AS holder
1	2a00:8642:42::3	1.4ms	0%	AS203993	STEFFANN-DC-AS - S.J.M. Steffann, NL
2	*	-	0%*	-
3	2a00:1ca8:1::194	2.9ms	0%	AS50673	Serverius-as - Serverius Holding B.V., NL
4	2a03:3f40::10:33	6.7ms	0%	AS50673	Serverius-as - Serverius Holding B.V., NL
5	2a02:2d8:1:a001:232a	4.6ms	0%	-
6	RT.CLR.MIL.IT.retn.net 2a02:2d8::57f5:e0c3	22.0ms	0%	AS9002	RETN-AS - RETN Limited, GB
7	wind-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:a5d0:1267:9	23.1ms	0%	-	NA
8	2a02:b000:fff::d92	25.1ms	0%	AS1267	ASN-WINDTRE - WIND TRE S.P.A., IT
9	2a02:b000:fff::ee2d	55.2ms	0%	AS1267	ASN-WINDTRE - WIND TRE S.P.A., IT
10	2a02:b000:fff::cfb	26.8ms	0%	AS1267	ASN-WINDTRE - WIND TRE S.P.A., IT
11	*	-	0%	-
12	2a02:b011:2ffc::7	24.2ms	0%	AS1267	ASN-WINDTRE - WIND TRE S.P.A., IT
13	2a02:b011:2ffc::1	25.2ms	0%	AS1267	ASN-WINDTRE - WIND TRE S.P.A., IT

tracepath -6

 1?: [LOCALHOST]                        0.040ms pmtu 1500
 1:  2a00:8642:42::3                                       2.150ms 
 1:  2a00:8642:42::3                                       1.768ms 
 2:  gw.friends.steffann.nl                                2.968ms 
 3:  2a00:1ca8:1::194                                      3.400ms 
 4:  2a03:3f40::10:33                                      6.419ms 
 5:  ae1-499.RT.SRV.DRO.NL.retn.net                        5.047ms 
 6:  RT.CLR.MIL.IT.retn.net                               21.786ms 
 7:  wind-v6.mix-it.net                                   22.872ms asymm 10 
 8:  2a02:b000:fff::d92                                   25.557ms asymm  7 
 9:  2a02:b000:fff::33                                    25.350ms asymm  8 
10:  2a02:b000:fff::cfb                                   27.663ms asymm  9 
11:  no reply
12:  2a02:b011:2ffc::7                                    25.164ms asymm 11 
13:  2a02:b011:2ffc::1                                    24.845ms !N
     Resume: pmtu 1500

From ITA host (Karsolink) transit only unreachable

filter likely at: past AS1267 (ASN-WINDTRE) · min PMTU on path: 1500

0/4

Echo small (56B) -

0/4

Echo 1500B (DF) -

Type 1 dest-unreach

TCP responds on

Path (traceroute + mtr + PTR)

#	IP / PTR	RTT	mtr loss	AS	AS holder
1	*	-	0%*	-
2	*	-	0%*	-
3	2a12:d8c0:101f:6::1	9.9ms	0%	AS204471	KARSOLINK - 2S Computers SRL, IT
4	2a03:b020:1:51::a	10.3ms	0%	AS41327	FIBERTELECOM-AS - Fiber Telecom S.p.A., IT
5	wind-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:a5d0:1267:9	9.0ms	0%	-	NA
6	2a02:b000:fff::d92	18.6ms	0%	AS1267	ASN-WINDTRE - WIND TRE S.P.A., IT
7	2a02:b000:fff::ee2f	19.5ms	0%	AS1267	ASN-WINDTRE - WIND TRE S.P.A., IT
8	2a02:b000:fff::cfb	19.2ms	0%	AS1267	ASN-WINDTRE - WIND TRE S.P.A., IT
9	*	-	0%	-
10	2a02:b011:2ffc::7	22.9ms	0%	AS1267	ASN-WINDTRE - WIND TRE S.P.A., IT
11	2a02:b011:2ffc::1	22.7ms	0%	AS1267	ASN-WINDTRE - WIND TRE S.P.A., IT

tracepath -6

 1?: [LOCALHOST]                        0.031ms pmtu 1500
 1:  no reply
 2:  2a12:d8c0:109f:121::a1                                1.003ms 
 3:  2a12:d8c0:101f:6::1                                  10.804ms 
 4:  2a03:b020:1:51::a                                    10.915ms 
 5:  wind-v6.mix-it.net                                    9.760ms asymm  6 
 6:  2a02:b000:fff::d92                                   19.061ms asymm 10 
 7:  2a02:b000:fff::cb                                    19.512ms asymm 11 
 8:  2a02:b000:fff::cfb                                   22.451ms asymm 12 
 9:  no reply
10:  2a02:b011:2ffc::7                                    23.872ms asymm 14 
11:  2a02:b011:2ffc::1                                    24.543ms !N
     Resume: pmtu 1500

From SLO host (6connect) transit only unreachable

filter likely at: past AS1267 (ASN-WINDTRE) · min PMTU on path: 1500

0/4

Echo small (56B) -

0/4

Echo 1500B (DF) -

Type 1 dest-unreach

TCP responds on

Path (traceroute + mtr + PTR)

#	IP / PTR	RTT	mtr loss	AS	AS holder
1	fw1-lju.6connect.com 2607:fae0:a000::2	0.3ms	0%*	AS8038	6CONNECT - 6connect, Inc., US
2	*	-	0%*	-
3	*	-	0%	-
4	*	-	0%	-
5	*	-	-	-
6	port-channel1.core1.zag2.he.net 2001:470:0:2ea::2	3.9ms	0%	AS6939	HURRICANE - Hurricane Electric LLC, US
7	*	-	-	-
8	wind-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:a5d0:1267:9	10.6ms	0%	-	NA
9	2a02:b000:fff::d92	34.7ms	0%	AS1267	ASN-WINDTRE - WIND TRE S.P.A., IT
10	2a02:b000:fff::ee2f	35.2ms	0%	AS1267	ASN-WINDTRE - WIND TRE S.P.A., IT
11	2a02:b000:fff::cfb	26.9ms	0%	AS1267	ASN-WINDTRE - WIND TRE S.P.A., IT
12	*	-	0%	-
13	2a02:b011:2ffc::7	38.9ms	0%	AS1267	ASN-WINDTRE - WIND TRE S.P.A., IT
14	2a02:b011:2ffc::1	38.4ms	0%	AS1267	ASN-WINDTRE - WIND TRE S.P.A., IT

tracepath -6

 1?: [LOCALHOST]                        0.021ms pmtu 1500
 1:  fw1-lju.6connect.com                                  0.500ms 
 1:  fw1-lju.6connect.com                                  0.419ms 
 2:  no reply
 3:  2a03:a100:0:201:1::1                                  1.142ms 
 4:  e0-1.core1.lju1.he.net                                2.064ms 
 5:  no reply
 6:  no reply
 7:  no reply
 8:  wind-v6.mix-it.net                                   10.609ms asymm  7 
 9:  2a02:b000:fff::d92                                   34.697ms asymm 12 
10:  2a02:b000:fff::cb                                    26.409ms 
11:  2a02:b000:fff::cfd                                   34.832ms asymm 14 
12:  no reply
13:  2a02:b011:2ffc::7                                    39.051ms asymm 15 
14:  2a02:b011:2ffc::1                                    42.126ms !N
     Resume: pmtu 1500