AS204947 - Speed-net_SRL SPEED-NET S.R.LPARFC 4890 ✓RPKI ✓ 1/1ASPA -

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AS overview

Test target: 2a0d:2100::1 · static prefix probe · address space: PA · prefixes announced: 1

prefix(es): 2a0d:2100::/29

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
2a0d:2100::1prb??refusedrefusedrefusedrefused

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 2020-06-20. IPv6 LAN: 2001:7f8:b:100:1d1:a520:4947:108. Locations: -.

RPKI & ASPA

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

PrefixRPKI stateReasonCovering VRP(s)
2a0d:2100::/29✓ validmatched VRP (correct origin, length within maxLength)AS204947 /29 maxLen 29 (ripe)

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

We probed 15 arbitrary IPv6 address(es) inside AS204947's announced prefix(es). No router inside the prefix responded. The deepest visible hop was 2001:470:0:2ea::2 at hop 6 - that router answers ICMPv6 Echo. This is not in AS204947'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 2026-05-30T12:47:27Z

From NL host (go6lab)   openRFC 4890 ✓

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

4/4
Echo small (56B) 49.9ms
4/4
Echo 1500B (DF) 49.7ms
yes
Type 1 dest-unreach
-
TCP responds on

Path (traceroute + mtr + PTR)

#IP / PTRRTTmtr lossASAS holder
12a00:8642:42::31.4ms0%AS203993STEFFANN-DC-AS - S.J.M. Steffann, NL
2gw.friends.steffann.nl
2a00:8642:1000:f000::1
2.1ms0%*AS203993STEFFANN-DC-AS - S.J.M. Steffann, NL
3speed-ix.fibertelecom.it
2001:7f8:b7::a504:1327:1
3.4ms0%-NA
42a03:b020::25150.0ms0%AS41327FIBERTELECOM-AS - Fiber Telecom S.p.A., IT
52a0d:2100::150.9ms0%AS204947Speed-net_SRL - SPEED-NET S.R.L, IT

tracepath -6

 1?: [LOCALHOST]                        0.031ms pmtu 1500
 1:  2a00:8642:42::3                                       1.786ms 
 1:  2a00:8642:42::3                                       1.490ms 
 2:  gw.friends.steffann.nl                                2.522ms 
 3:  speed-ix.fibertelecom.it                              3.698ms 
 4:  2a03:b020::251                                       49.784ms 
 5:  2a0d:2100::1                                         50.498ms reached
     Resume: pmtu 1500 hops 5 back 5 

From ITA host (Karsolink)   openRFC 4890 ✓

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

4/4
Echo small (56B) 35.0ms
3/4
Echo 1500B (DF) 35.2ms
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
0.5ms0%*AS204471KARSOLINK - 2S Computers SRL, IT
22a12:d8c0:109f:121::a10.5ms0%*AS204471KARSOLINK - 2S Computers SRL, IT
32a12:d8c0:101f:103::18.6ms10%AS204471KARSOLINK - 2S Computers SRL, IT
42a0d:2100::131.0ms0%AS204947Speed-net_SRL - SPEED-NET S.R.L, IT

Rate-limited ICMPv6: hop 3 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).

tracepath -6

 1?: [LOCALHOST]                        0.027ms pmtu 1500
 1:  no reply
 2:  2a12:d8c0:109f:121::a1                                0.944ms 
 3:  2a12:d8c0:101f:103::1                                 8.936ms 
 4:  2a0d:2100::1                                         34.127ms reached
     Resume: pmtu 1500 hops 4 back 4 

From SLO host (6connect)   openRFC 4890 ✓

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

4/4
Echo small (56B) 37.5ms
4/4
Echo 1500B (DF) 37.6ms
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
0.2ms0%*AS80386CONNECT - 6connect, Inc., US
2*---
32a03:a100:0:201:1::10.7ms10%AS56635XENYA - XENYA inzeniring, proizvodnja in trgovina, d.o.o. Ljubljana, SI
4e0-1.core1.lju1.he.net
2001:470:1:5be::1
2.1ms10%AS6939HURRICANE - Hurricane Electric LLC, US
5*---
6port-channel1.core1.zag2.he.net
2001:470:0:2ea::2
3.9ms0%AS6939HURRICANE - Hurricane Electric LLC, US
7*---
82a0d:2100::138.9ms0%AS204947Speed-net_SRL - SPEED-NET S.R.L, IT

Rate-limited ICMPv6: hop 3, hop 4 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).

tracepath -6

 1?: [LOCALHOST]                        0.034ms pmtu 1500
 1:  fw1-lju.6connect.com                                  0.648ms 
 1:  fw1-lju.6connect.com                                  0.601ms 
 2:  no reply
 3:  2a03:a100:0:201:1::1                                  0.947ms 
 4:  e0-1.core1.lju1.he.net                                1.987ms 
 5:  no reply
 6:  port-channel1.core1.zag2.he.net                       4.186ms 
 7:  no reply
 8:  2a0d:2100::1                                         45.373ms reached
     Resume: pmtu 1500 hops 8 back 6