AS47927 - WIFIWEB WIFIWEB s.r.lPARPKI ✓ 1/1ASPA -

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IPv6 prefix announced, but nothing inside is responding yet. AS47927 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:b88::1 · (no live host found) · address space: PA · prefixes announced: 1

prefix(es): 2a02:b88::/32

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

MIX-IT / NAMEX / MINAP / TOP-IX / VSIX / EQUINIX-MILAN / BGPX-ROME / NAMEX-BARI / PCIX / DECIX-PALERMO member - Open peering, peering member, since 2010-07-29. IPv6 LAN: 2001:7f8:b:100:1d1:a5d4:7927:58. Locations: -.

RPKI & ASPA

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

PrefixRPKI stateReasonCovering VRP(s)
2a02:b88::/32✓ validmatched VRP (correct origin, length within maxLength)AS47927 /32 maxLen 32 (ripe)

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

We probed 15 arbitrary IPv6 address(es) inside AS47927's announced prefix(es). No router inside the prefix responded. The deepest visible hop was 2001:7f8:30:0:3:1:2:5291 at hop 7 - that router answers ICMPv6 Echo. This is not in AS47927'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 2026-05-25T12:31:54Z

Failure detail — what to grep in your logs
vantageour sourceyour targetmethodresulttested (UTC)
go6lab2a00:8642:42::752a02:b88::1icmp6-echono_echo2026-05-25T12:31:54Z
karsolink2a12:d8c0:105a:9001::a1542a02:b88::1icmp6-echono_echo2026-05-25T12:39:55Z
odin2607:fae0:a000::422a02:b88::1icmp6-echono_echo2026-05-25T12:31:36Z

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: no path · 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::31.5ms0%AS203993STEFFANN-DC-AS - S.J.M. Steffann, NL
2*-0%*-
3speed-ix.netix.net
2001:7f8:b7::a505:7463:1		3.0ms0%-NA
4as47927.v6.netix.net
2001:67c:29f0::4:7927:1		28.9ms0%-NA
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tracepath -6

 1?: [LOCALHOST]                        0.037ms pmtu 1500
 1:  2a00:8642:42::3                                       1.481ms 
 1:  2a00:8642:42::3                                       1.164ms 
 2:  gw.friends.steffann.nl                                1.956ms 
 3:  speed-ix.netix.net                                    3.023ms 
 4:  as47927.v6.netix.net                                 30.402ms asymm 10 
 5:  no reply
 6:  no reply
 7:  no reply
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24:  no reply
     Too many hops: pmtu 1500
     Resume: pmtu 1500

From ITA host (Karsolink)   transit only unreachable

filter likely at: no path · 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*---
3*-10%-
4wifiweb.minap.it
2001:7f8:c5::a504:7927:1		11.3ms0%AS47927Wifiweb s.r.l.
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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]                        0.032ms pmtu 1500
 1:  no reply
 2:  2a12:d8c0:109f:121::a1                                1.022ms 
 3:  2a12:d8c0:101f:6::1                                  10.427ms 
 4:  wifiweb.minap.it                                     11.926ms asymm  7 
 5:  no reply
 6:  no reply
 7:  no reply
 8:  no reply
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     Too many hops: pmtu 1500
     Resume: pmtu 1500

From SLO host (6connect)   transit only unreachable

filter likely at: no path · 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		0.3ms0%*AS80386CONNECT - 6connect, Inc., US
2*---
3*-60%-
42a00:ee0:1:15::2111.1ms0%AS5603SIOL-NET - Telekom Slovenije, d.d., SI
52a11:4142:20020.8ms0%-
6r2-vie1-at.as5405.net
2a11:4140::1e		7.0ms0%AS5405INTERDOTLINK - Inter.link GmbH, DE
7et9-4096.r2-vie2-at.as5405.net
2001:7f8:30:0:3:1:2:5291		7.0ms0%-NA
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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]                        0.029ms pmtu 1500
 1:  fw1-lju.6connect.com                                  0.731ms 
 1:  fw1-lju.6connect.com                                  0.460ms 
 2:  no reply
 3:  2a00:ee1:800:9::1                                     2.369ms 
 4:  2a00:ee0:1:15::2                                      1.142ms asymm  3 
 5:  2a11:4142:2002::                                      1.380ms asymm  6 
 6:  r2-vie1-at.as5405.net                                 7.214ms asymm  9 
 7:  et9-4096.r2-vie2-at.as5405.net                        7.332ms asymm  8 
 8:  no reply
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     Too many hops: pmtu 1500
     Resume: pmtu 1500