AS51615 - KaTV Nova GoricaPARFC 4890 ✓RPKI ✓ 1/1ASPA -

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AS overview

Test target: 2a02:2590:0:226::226:10 · ns1.dikadom.com · address space: PA · prefixes announced: 1

prefix(es): 2a02:2590::/32

Targets & per-vantage-point probe results (10 target(s) across 7 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 / hostnameSourceSRB host (SOX, Belgrade)DE host (Berlin)DE host (Düsseldorf)NL host (go6lab)ITA host (Karsolink)SLO host (6connect)SLO host (T-2)
ping1500B:80:443reachedping1500B:80:443reachedping1500B:80:443reachedping1500B:80:443reachedping1500B:80:443reachedping1500B:80:443reachedping1500B:80:443reached
2a02:2590:0:1128::6hit??-??-??-??-??-??-??-
2a02:2590:0:1226:1226:1227:217:1hitrefusedrefusedrefusedrefusedrefusedrefused??refusedrefusedrefusedrefusedrefusedrefused
2a02:2590:0:1226:1226:1227:217:11hitopenopen-openopen-openopen-openopen-openopen-openopen-openopen-
2a02:2590:0:1226:1226:1227:217:3hit??-??-??-??-??-??-??-
2a02:2590:0:1226:1226:1227:217:40hitopenopen-openopen-openopen-openopen-openopen-openopen-openopen-
2a02:2590:0:1226:1226:1227:217:9hit??-??-??-??-??-??-??-
2a02:2590:0:224::aaaa:11
ns1.kate-wing.si
whois??-??-??-??-??-??-??-
2a02:2590:0:225::bbbb:11
ns2.kate-wing.si
whois??-??-??-??-??-??-??-
2a02:2590:0:226::226:10
ns1.dikadom.com
NSopenopen-openopen-openopen-openopen-openopen-openopen-openopen-
2a02:2590:0:226::227:10
ns3.dikadom.com
NS??-??-??-??-??-??-??-

RPKI & ASPA

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

PrefixRPKI stateReasonCovering VRP(s)
2a02:2590::/32✓ validmatched VRP (correct origin, length within maxLength)AS51615 /32 maxLen 32 (ripe)

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

We probed 35 arbitrary IPv6 address(es) inside AS51615's announced prefix(es). No router inside the prefix responded. The deepest visible hop was 2a02:800:1:6000::1 at hop 10 - that router answers ICMPv6 Echo. This is not in AS51615's announced prefix; operationally it's the AS-edge / peering interface (often on a SIX 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 2026-09-23T10:34:37Z

Multi-vantage path map

Every hop of all vantages’ traceroutes toward the target, drawn left→right, grouped into per-AS bubbles (a hop seen from several vantages is one shared bubble, so converging paths merge). It answers two questions per vantage — shown on each source bubble as echo ✓/⚠/✗ · trace ✓/✗: did the destination reply to ICMPv6 Echo (✓ honored, ⚠ replied but PTB not honored, ✗ no reply), and did the traceroute reach it. A line to the target is drawn only when that vantage got an echo reply — solid if the PTB was honored, dashed if not (reachable but a broken-PMTUD / RFC 4890 violation). The path depth still shows how far the traceroute itself got, and runs of unanswered (* *) hops collapse into one dashed “silent” bubble. Open full size ↗

multi-vantage path diagram for AS51615

From SRB host (SOX, Belgrade)   openRFC 4890 ✓

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

4/4
Echo small (56B) 18.8ms
4/4
Echo 1500B (DF) 20.5ms
no
Type 1 dest-unreach
443,80
TCP responds on

Path (traceroute + mtr + PTR)

#IP / PTRRTTmtr lossASAS holder
12a09:ab81::10.2ms0%*AS60733PERKE-NET - ZORAN PEROVIC trading as Agencija Perke.NET, RS
2sox-pn.sox.rs
2001:7f8:1e:8::3a
0.2ms0%AS13004SOX - Serbian Open Exchange DOO, RS
32001:7f8:1e:8::3d0.4ms0%AS13004SOX - Serbian Open Exchange DOO, RS
42a02:2d8:0:a00e:232a51.8ms0%-
52001:7f8:30:0:2:1:0:911913.2ms60%-NA
6sn-lju-be-3-85-slo.ntwk.softnet.si
2a02:800:1:6001::1
16.8ms70%AS9119SOFTNET-AS - SOFTNET d.o.o., SI
72a02:800:71:2000::217.6ms0%AS9119SOFTNET-AS - SOFTNET d.o.o., SI
8kw-dmz3-bgp-viv6.core.kate-wing-si
2a02:2590:0:2128::10
17.8ms0%AS51615KATENG-ASN - Zavod Kabelska televizija Nova gorica, SI
9*-0%-
10*---
11*---
12*---
13*---
14*---
15*---
16*---
17*---
18*---

Rate-limited ICMPv6: hop 5, hop 6 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).

tracepath -6

 1?: [LOCALHOST]                        0.011ms pmtu 1500
 1:  _gateway                                              0.399ms 
 1:  _gateway                                              0.282ms 
 2:  sox-pn.sox.rs                                         0.611ms 
 3:  2001:7f8:1e:8::3d                                     0.394ms asymm  2 
 4:  ae8-930.RT.IRX.VIE.AT.retn.net                       12.775ms asymm  3 
 5:  2001:7f8:30:0:2:1:0:9119                             13.457ms asymm  3 
 6:  sn-lju-be-3-85-slo.ntwk.softnet.si                   18.523ms asymm  7 
 7:  2a02:800:71:2000::2                                  17.840ms asymm  8 
 8:  kw-dmz3-bgp-viv6.core.kate-wing-si                   18.343ms 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
     Too many hops: pmtu 1500
     Resume: pmtu 1500 

From DE host (Berlin)   openRFC 4890 ✓

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

4/4
Echo small (56B) 27.8ms
4/4
Echo 1500B (DF) 27.9ms
no
Type 1 dest-unreach
443,80
TCP responds on

Path (traceroute + mtr + PTR)

#IP / PTRRTTmtr lossASAS holder
1*-0%*-
2ae0-2453.cr10.ber01.lwlcom.net
2a06:d1c0::dead:beef:1c02
0.5ms0%*AS59645WYBT-NET - Tobias Fiebig, DE
3ae0-40.cr10.muc02.lwlcom.net
2a00:c380:b200:230::178
11.1ms0%AS50629LWLCOM - LWLcom GmbH, DE
4ae0-10.cr10.muc01.lwlcom.net
2a00:c380:b200:230::177
11.3ms0%AS50629LWLCOM - LWLcom GmbH, DE
5*-80%-
6*-80%-
72a02:800:71:2000::227.3ms0%AS9119SOFTNET-AS - SOFTNET d.o.o., SI
8kw-dmz3-bgp-viv6.core.kate-wing-si
2a02:2590:0:2128::10
27.4ms0%AS51615KATENG-ASN - Zavod Kabelska televizija Nova gorica, SI
9*-0%-
10*---
11*---
12*---
13*---
14*---
15*---
16*---
17*---
18*---

Rate-limited ICMPv6: hop 5, hop 6 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).

tracepath -6

 1?: [LOCALHOST]                        0.047ms pmtu 1500
 1:  xe-0-0-13-178.gw01.ber01.as59645.net                  0.396ms 
 1:  xe-0-0-13-178.gw01.ber01.as59645.net                  0.421ms 
 2:  ae0-2453.cr10.ber01.lwlcom.net                        0.815ms 
 3:  ae0-40.cr10.muc02.lwlcom.net                         11.445ms 
 4:  ae0-10.cr10.muc01.lwlcom.net                         11.869ms 
 5:  2001:7f8:30:0:2:1:0:9119                             18.322ms 
 6:  sn-lju-be-3-85-slo.ntwk.softnet.si                   26.532ms asymm  7 
 7:  2a02:800:71:2000::2                                  27.428ms asymm  8 
 8:  kw-dmz3-bgp-viv6.core.kate-wing-si                   27.734ms 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
     Too many hops: pmtu 1500
     Resume: pmtu 1500 

From DE host (Düsseldorf)   openRFC 4890 ✓

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

4/4
Echo small (56B) 23.3ms
4/4
Echo 1500B (DF) 22.2ms
no
Type 1 dest-unreach
443,80
TCP responds on

Path (traceroute + mtr + PTR)

#IP / PTRRTTmtr lossASAS holder
1xe-0-0-12-142.gw01.dus01.as59645.net
2a06:d1c1:100:d::1
0.2ms0%*AS59645WYBT-NET - Tobias Fiebig, DE
2ae0-101.cr10.dus02.lwlcom.net
2a06:d1c0::dead:beef:1301
0.3ms0%*AS59645WYBT-NET - Tobias Fiebig, DE
3ae0-40.cr10.dus05.lwlcom.net
2a00:c380:b200:230::199
0.2ms0%AS50629LWLCOM - LWLcom GmbH, DE
4ae0-10.cr10.ams02.lwlcom.net
2a00:c380:b200:230::101
11.1ms0%AS50629LWLCOM - LWLcom GmbH, DE
52001:7f8:13::a500:9119:113.8ms80%-NA
6*-80%-
72a02:800:71:2000::221.6ms0%AS9119SOFTNET-AS - SOFTNET d.o.o., SI
8kw-dmz3-bgp-viv6.core.kate-wing-si
2a02:2590:0:2128::10
21.7ms0%AS51615KATENG-ASN - Zavod Kabelska televizija Nova gorica, SI
9*-0%-
10*---
11*---
12*---
13*---
14*---
15*---
16*---
17*---
18*---

Rate-limited ICMPv6: hop 5, hop 6 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).

tracepath -6

 1?: [LOCALHOST]                        0.023ms pmtu 1500
 1:  xe-0-0-12-142.gw01.dus01.as59645.net                  0.282ms 
 1:  xe-0-0-12-142.gw01.dus01.as59645.net                  0.252ms 
 2:  ae0-101.cr10.dus02.lwlcom.net                         0.360ms 
 3:  ae0-40.cr10.dus05.lwlcom.net                          0.376ms 
 4:  ae0-10.cr10.ams02.lwlcom.net                          3.311ms 
 5:  2001:7f8:13::a500:9119:1                             14.601ms asymm  3 
 6:  sn-lju-hu-0-1-0-0-81-slo.ntwk.softnet.si             20.839ms 
 7:  2a02:800:71:2000::2                                  22.017ms 
 8:  kw-dmz3-bgp-viv6.core.kate-wing-si                   21.877ms 
 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
     Too many hops: pmtu 1500
     Resume: pmtu 1500 

From NL host (go6lab)   openRFC 4890 ✓

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

4/4
Echo small (56B) 27.8ms
4/4
Echo 1500B (DF) 29.1ms
no
Type 1 dest-unreach
443,80
TCP responds on

Path (traceroute + mtr + PTR)

#IP / PTRRTTmtr lossASAS holder
12a00:8642:42::21.1ms0%AS203993GNA-DC1-AS - S.J.M. Steffann, NL
2*-0%*-
32a00:1ca8:1::1942.9ms0%AS50673Serverius-as - Serverius Holding B.V., NL
42a03:3f40::10:335.7ms0%AS50673Serverius-as - Serverius Holding B.V., NL
52001:7f8:13::a500:9119:111.4ms10%-NA
6*-20%-
72a02:800:71:2000::227.0ms0%AS9119SOFTNET-AS - SOFTNET d.o.o., SI
8kw-dmz3-bgp-viv6.core.kate-wing-si
2a02:2590:0:2128::10
674.0ms0%AS51615KATENG-ASN - Zavod Kabelska televizija Nova gorica, SI
9*-0%-
10*---
11*---
12*---
13*---
14*---
15*---
16*---
17*---
18*---

Rate-limited ICMPv6: hop 5, hop 6 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).

tracepath -6

 1?: [LOCALHOST]                        0.022ms pmtu 1500
 1:  2a00:8642:42::2                                       2.842ms 
 1:  2a00:8642:42::2                                       2.956ms 
 2:  no reply
 3:  2a00:1ca8:1::194                                    448.473ms 
 4:  2a03:3f40::10:33                                     15.904ms 
 5:  no reply
 6:  no reply
 7:  2a02:800:71:2000::2                                  25.557ms asymm  9 
 8:  kw-dmz3-bgp-viv6.core.kate-wing-si                   26.236ms asymm 10 
 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
     Too many hops: pmtu 1500
     Resume: pmtu 1500 

From ITA host (Karsolink)   openRFC 4890 ✓

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

4/4
Echo small (56B) 27.1ms
4/4
Echo 1500B (DF) 27.1ms
no
Type 1 dest-unreach
443,80
TCP responds on

Path (traceroute + mtr + PTR)

#IP / PTRRTTmtr lossASAS holder
1*-0%*-
2*---
3*---
4*---
5be47.core1.mil2.he.net
2001:470:e:69::2
12.1ms0%AS6939HURRICANE - Hurricane Electric LLC, US
6be1.core1.zrh2.he.net
2001:470:e:dd::2
15.7ms0%AS6939HURRICANE - Hurricane Electric LLC, US
7be10.core4.fra1.he.net
2001:470:e:153::1
21.0ms10%AS6939HURRICANE - Hurricane Electric LLC, US
8*---
9decix.softnet.si
2001:7f8::239f:0:1
17.9ms--NA
10sn-lju-hu-0-1-0-0-81-slo.ntwk.softnet.si
2a02:800:1:6000::1
26.1ms-AS9119SOFTNET-AS - SOFTNET d.o.o., SI
112a02:800:71:2000::226.6ms0%AS9119SOFTNET-AS - SOFTNET d.o.o., SI
12kw-dmz3-bgp-viv6.core.kate-wing-si
2a02:2590:0:2128::10
26.5ms0%AS51615KATENG-ASN - Zavod Kabelska televizija Nova gorica, SI
13*-0%-
14*---
15*---
16*---
17*---
18*---

Rate-limited ICMPv6: hop 7 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).

tracepath -6

 1?: [LOCALHOST]                        0.038ms pmtu 1500
 1:  karsolink-01.net.karsolink.com                        0.738ms 
 1:  karsolink-01.net.karsolink.com                        0.909ms 
 2:  2a12:d8c0:109f:121::a1                                0.729ms 
 3:  2a12:d8c0:101f:6::1                                  10.423ms 
 4:  no reply
 5:  be47.core1.mil2.he.net                               12.767ms 
 6:  be1.core1.zrh2.he.net                                14.752ms 
 7:  be10.core4.fra1.he.net                               20.561ms 
 8:  no reply
 9:  decix.softnet.si                                     17.524ms asymm  6 
10:  sn-lju-hu-0-1-0-0-81-slo.ntwk.softnet.si             26.608ms asymm  8 
11:  2a02:800:71:2000::2                                  26.277ms asymm  9 
12:  kw-dmz3-bgp-viv6.core.kate-wing-si                   26.456ms asymm 11 
13:  no reply
14:  no reply
15:  no reply
16:  no reply
17:  no reply
18:  no reply
     Too many hops: pmtu 1500
     Resume: pmtu 1500 

From SLO host (6connect)   openRFC 4890 ✓

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

4/4
Echo small (56B) 3.0ms
4/4
Echo 1500B (DF) 3.2ms
no
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*---
3*-40%-
4*-20%-
52a02:800:71:2000::23.2ms0%AS9119SOFTNET-AS - SOFTNET d.o.o., SI
6kw-dmz3-bgp-viv6.core.kate-wing-si
2a02:2590:0:2128::10
3.1ms0%AS51615KATENG-ASN - Zavod Kabelska televizija Nova gorica, SI
7*-0%-
8*---
9*---
10*---
11*---
12*---
13*---
14*---
15*---
16*---
17*---
18*---

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]                        0.042ms pmtu 9000
 1:  fw1-lju.6connect.com                                  0.731ms 
 1:  fw1-lju.6connect.com                                  0.638ms 
 2:  no reply
 3:  2a03:a100:0:201:1::1                                  1.155ms 
 4:  2a03:a100:0:201:1::1                                  1.768ms pmtu 1500
 4:  2001:7f8:46:0:1::9119                                 3.369ms asymm  5 
 5:  2a02:800:71:2000::2                                   3.326ms asymm  6 
 6:  kw-dmz3-bgp-viv6.core.kate-wing-si                    4.568ms asymm  7 
 7:  no reply
 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
     Too many hops: pmtu 1500

From SLO host (T-2)   openRFC 4890 ✓

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

4/4
Echo small (56B) 4.6ms
4/4
Echo 1500B (DF) 4.9ms
no
Type 1 dest-unreach
443,80
TCP responds on

Path (traceroute + mtr + PTR)

#IP / PTRRTTmtr lossASAS holder
1*---
22a01:260:1::22512.3ms0%*AS34779T-2-AS - T-2, d.o.o., SI
3*-0%*-
4*-60%-
5*-0%-
6kw-dmz3-bgp-viv6.core.kate-wing-si
2a02:2590:0:2128::10
14.0ms0%AS51615KATENG-ASN - Zavod Kabelska televizija Nova gorica, SI
7*-0%-
8*---
9*---
10*---
11*---
12*---
13*---
14*---
15*---
16*---
17*---
18*---

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

tracepath -6

 1?: [LOCALHOST]                        0.024ms pmtu 1500
 1:  2a01:261:313:b814::1                                  0.841ms 
 2:  2a01:260:1::225                                       3.183ms 
 3:  2a01-260-1-1--9c.core6.t-2.net                        3.674ms 
 4:  no reply
 5:  2a02:800:71:2000::2                                   4.414ms 
 6:  kw-dmz3-bgp-viv6.core.kate-wing-si                    4.096ms asymm  7 
 7:  no reply
 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
     Too many hops: pmtu 1500
     Resume: pmtu 1500