AS207028 - SFSC ASSOCIAZIONE DI PROMOZIONE SOCIALE SENZA FILI SENZA CO…PARFC 4890 ✓RPKI -ASPA -

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AS overview

Test target: 2a0a:1301::1 · static prefix probe · address space: PA · prefixes announced: 2

prefix(es): 2a0a:1301::/32, 2a0a:1300::/32

Targets & per-vantage-point probe results (1 target(s) across 3 vantage point(s))

Source codes (hover any badge for full description): CUR=curated · NS/SOA/MX=DNS records · SPF=SPF TXT · DRV=holder-derived (www, ns1, mail, gw, …) · ATL=RIPE Atlas · PDB=PeeringDB · WHOIS=RIPE whois · RDAP=RIPE RDAP · HIT=IPv6 Hitlist · RTR=in-prefix path hop (router) · PRB=static prefix probe · SYN=synthetic prefix::1 fallback

Target IP / hostnameSourceNL host (go6lab)ITA host (Karsolink)SLO host (6connect)
ping1500B:80:443reachedping1500B:80:443reachedping1500B:80:443reached
2a0a:1301::1prb??refusedrefusedrefusedrefused

RPKI & ASPA

0 of 2 prefix(es) covered by a valid ROA, 2 not-found.

PrefixRPKI stateReasonCovering VRP(s)
2a0a:1301::/32- not-foundno covering VRP
2a0a:1300::/32- not-foundno covering VRP

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

We probed 30 arbitrary IPv6 address(es) inside AS207028's announced prefix(es). No router inside the prefix responded. The deepest visible hop was 2001:1418:8:1::192 at hop 13 - that router answers ICMPv6 Echo. This is not in AS207028'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 2026-05-30T12:46:39Z

From NL host (go6lab)   openRFC 4890 ✓

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

4/4
Echo small (56B) 20.5ms
4/4
Echo 1500B (DF) 20.7ms
yes
Type 1 dest-unreach
-
TCP responds on

Path (traceroute + mtr + PTR)

#IP / PTRRTTmtr lossASAS holder
12a00:8642:42::31.1ms0%AS203993STEFFANN-DC-AS - S.J.M. Steffann, NL
2gw.friends.steffann.nl
2a00:8642:1000:f000::1
1.9ms0%*AS203993STEFFANN-DC-AS - S.J.M. Steffann, NL
3ccr2-ccr1.dc1.nogalliance.org
2a00:8642:dc1:2::b
2.0ms0%AS203993STEFFANN-DC-AS - S.J.M. Steffann, NL
4ams-ix.ipv6.itgate.net
2001:7f8:1::a501:2779:1
3.9ms0%-NA
5if-0-2-0-1.Muttley-Monster.TRN.ipv6.itgate.net
2001:1418:1::10e2
20.6ms0%AS12779ITGATE - IT.Gate S.p.A., IT
62a0a:1301::120.7ms0%AS207028SFSC - ASSOCIAZIONE DI PROMOZIONE SOCIALE SENZA FILI SENZA CONFINI, IT

tracepath -6

 1?: [LOCALHOST]                        0.031ms pmtu 1500
 1:  2a00:8642:42::3                                       1.348ms 
 1:  2a00:8642:42::3                                       1.403ms 
 2:  gw.friends.steffann.nl                                2.477ms 
 3:  ccr2-ccr1.dc1.nogalliance.org                         2.525ms asymm  2 
 4:  ams-ix.ipv6.itgate.net                                5.290ms asymm  3 
 5:  if-0-2-0-1.Muttley-Monster.TRN.ipv6.itgate.net       21.963ms 
 6:  2a0a:1301::1                                         21.598ms reached
     Resume: pmtu 1500 hops 6 back 6 

From ITA host (Karsolink)   openRFC 4890 ✓

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

4/4
Echo small (56B) 12.1ms
4/4
Echo 1500B (DF) 12.2ms
yes
Type 1 dest-unreach
443,80
TCP responds on

Path (traceroute + mtr + PTR)

#IP / PTRRTTmtr lossASAS holder
1karsolink-01.net.karsolink.com
2a12:d8c0:105a:9001::1
0.3ms0%*AS204471KARSOLINK - 2S Computers SRL, IT
2*-0%*-
32a12:d8c0:101f:6::110.0ms30%AS204471KARSOLINK - 2S Computers SRL, IT
4itgate.minap.it
2001:7f8:c5::a501:2779:1
10.7ms0%AS12779ITgate S.p.A.
5if-0-2-0-1.Muttley-Monster.TRN.ipv6.itgate.net
2001:1418:1::10e2
12.5ms0%AS12779ITGATE - IT.Gate S.p.A., IT
62a0a:1301::112.0ms0%AS207028SFSC - ASSOCIAZIONE DI PROMOZIONE SOCIALE SENZA FILI SENZA CONFINI, IT

Rate-limited ICMPv6: hop 3 (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:  2a12:d8c0:109f:121::a1                                1.022ms 
 3:  2a12:d8c0:101f:6::1                                  10.409ms 
 4:  itgate.minap.it                                      11.330ms 
 5:  no reply
 6:  2a0a:1301::1                                         12.640ms reached
     Resume: pmtu 1500 hops 6 back 6 

From SLO host (6connect)   openRFC 4890 ✓

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

4/4
Echo small (56B) 17.8ms
4/4
Echo 1500B (DF) 17.9ms
yes
Type 1 dest-unreach
443,80
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*---
32a00:ee1:800:9::11.9ms60%AS5603SIOL-NET - Telekom Slovenije, d.d., SI
42a00:ee0:1:10::21.0ms0%AS5603SIOL-NET - Telekom Slovenije, d.d., SI
5de-cix.fra.ipv6.itgate.net
2001:7f8::31eb:0:1
15.0ms0%-NA
6if-0-2-0-1.Muttley-Monster.TRN.ipv6.itgate.net
2001:1418:1::10e2
18.2ms0%AS12779ITGATE - IT.Gate S.p.A., IT
72a0a:1301::118.0ms0%AS207028SFSC - ASSOCIAZIONE DI PROMOZIONE SOCIALE SENZA FILI SENZA CONFINI, IT

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                                  0.554ms 
 1:  fw1-lju.6connect.com                                  0.478ms 
 2:  no reply
 3:  2a00:ee1:800:9::1                                     2.760ms 
 4:  2a00:ee0:1:15::2                                      1.161ms asymm  3 
 5:  de-cix.fra.ipv6.itgate.net                           15.101ms asymm  9 
 6:  if-0-2-0-1.Muttley-Monster.TRN.ipv6.itgate.net       18.312ms asymm  9 
 7:  2a0a:1301::1                                         18.366ms reached
     Resume: pmtu 1500 hops 7 back 10