AS25173 - ISKRAPIRFC 4890 ✓RPKI ✓ 1/1ASPA -

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AS overview

Test target: 2001:67c:2004:1::2 · via IPv6 Hitlist (responsive) · address space: PI · prefixes announced: 1

prefix(es): 2001:67c:2004::/48

Targets & per-vantage-point probe results (1 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
2001:67c:2004:1::2hit??-??-??-??-??-??-??-

RPKI & ASPA

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

PrefixRPKI stateReasonCovering VRP(s)
2001:67c:2004::/48✓ validmatched VRP (correct origin, length within maxLength)AS25173 /48 maxLen 48 (ripe)

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

At least one router inside AS25173's announced prefix replied during the random-target probe. Hop(s): 2001:67c:2004:1::2. These are candidate targets for direct testing.

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 2026-09-23T10:32:15Z

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 AS25173

From SRB host (SOX, Belgrade)   openRFC 4890 ✓

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

4/4
Echo small (56B) 27.2ms
4/4
Echo 1500B (DF) 27.4ms
no
Type 1 dest-unreach
-
TCP responds on

Path (traceroute + mtr + PTR)

#IP / PTRRTTmtr lossASAS holder
12a09:ab81::10.3ms0%*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::3d0.5ms0%AS13004SOX - Serbian Open Exchange DOO, RS
42a02:2d8:0:a00e:232a12.6ms0%-
52001:7f8:30:0:2:1:3:477917.3ms0%-NA
62a01-260-1-1--d.core6.t-2.net
2a01:260:1:1::d
17.3ms0%*AS34779T-2-AS - T-2, d.o.o., SI
72a01-260-1-1--93.core6.t-2.net
2a01:260:1:1::93
18.4ms0%*AS34779T-2-AS - T-2, d.o.o., SI
82a00:ee0:5:7::226.5ms0%AS5603SIOL-NET - Telekom Slovenije, d.d., SI
9*-0%-
10*---
11*---
12*---
13*---
14*---
15*---
16*---
17*---
18*---
19*---
20*---
21*---

tracepath -6

 1?: [LOCALHOST]                        0.021ms pmtu 1500
 1:  _gateway                                              0.622ms 
 1:  _gateway                                              0.228ms 
 2:  sox-pn.sox.rs                                         0.316ms 
 3:  2001:7f8:1e:8::3d                                     0.773ms asymm  2 
 4:  ae8-930.RT.IRX.VIE.AT.retn.net                       12.914ms asymm  3 
 5:  2001:7f8:30:0:2:1:3:4779                             17.407ms asymm  8 
 6:  2a01-260-1-1--d.core6.t-2.net                        17.878ms asymm  7 
 7:  2a01-260-1-1--93.core6.t-2.net                       17.600ms asymm  9 
 8:  2a00:ee0:5:7::2                                      27.285ms asymm  7 
 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
19:  no reply
20:  no reply
21:  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) 26.2ms
4/4
Echo 1500B (DF) 26.3ms
no
Type 1 dest-unreach
-
TCP responds on

Path (traceroute + mtr + PTR)

#IP / PTRRTTmtr lossASAS holder
1xe-0-0-13-178.gw01.ber01.as59645.net
2a06:d1c1:100:b::1
0.2ms0%*AS59645WYBT-NET - Tobias Fiebig, DE
2ae0-2453.cr10.ber01.lwlcom.net
2a06:d1c0::dead:beef:1c02
0.9ms0%*AS59645WYBT-NET - Tobias Fiebig, DE
3ae3-90.cr10.ham01.lwlcom.net
2a00:c380:b200:230::192
5.1ms0%AS50629LWLCOM - LWLcom GmbH, DE
4ae0-50.cr11.ham01.lwlcom.net
2a00:c380:b200:230::45
5.0ms0%AS50629LWLCOM - LWLcom GmbH, DE
52a00:c380:f000::4b5.2ms0%AS50629LWLCOM - LWLcom GmbH, DE
6ae4-2087.dus10.core-backbone.com
2a01:4a0:0:2087::33
11.3ms0%AS201011CORE-BACKBONE - Core-Backbone GmbH, DE
7ae21-2071.fra10.core-backbone.com
2a01:4a0:0:2071::4
10.8ms0%AS201011CORE-BACKBONE - Core-Backbone GmbH, DE
8ae2-2021.fra20.core-backbone.com
2a01:4a0:0:2021::4
10.6ms0%AS201011CORE-BACKBONE - Core-Backbone GmbH, DE
9ae6-2003.nbg20.core-backbone.com
2a01:4a0:0:2003::2
11.9ms0%AS201011CORE-BACKBONE - Core-Backbone GmbH, DE
10ae2-2032.muc20.core-backbone.com
2a01:4a0:0:2032::7
14.5ms0%AS201011CORE-BACKBONE - Core-Backbone GmbH, DE
11ae1-2028.vie10.core-backbone.com
2a01:4a0:0:2028::10
20.1ms0%AS201011CORE-BACKBONE - Core-Backbone GmbH, DE
122a01:4a0:1338:115::231.9ms0%AS201011CORE-BACKBONE - Core-Backbone GmbH, DE
132a01-260-1-1--d.core6.t-2.net
2a01:260:1:1::d
31.5ms0%*AS34779T-2-AS - T-2, d.o.o., SI
142a01-260-1-1--93.core6.t-2.net
2a01:260:1:1::93
31.8ms0%*AS34779T-2-AS - T-2, d.o.o., SI
152a00:ee0:5:7::226.2ms0%AS5603SIOL-NET - Telekom Slovenije, d.d., SI
16*-0%-
17*---
18*---
19*---
20*---
21*---

tracepath -6

 1?: [LOCALHOST]                        0.020ms pmtu 1500
 1:  xe-0-0-13-178.gw01.ber01.as59645.net                  0.577ms 
 1:  xe-0-0-13-178.gw01.ber01.as59645.net                  0.411ms 
 2:  ae0-2453.cr10.ber01.lwlcom.net                        0.899ms 
 3:  ae3-90.cr10.ham01.lwlcom.net                          5.396ms 
 4:  ae0-50.cr11.ham01.lwlcom.net                          5.027ms 
 5:  2a00:c380:f000::4b                                    5.622ms asymm  4 
 6:  ae4-2087.dus10.core-backbone.com                     12.139ms asymm  5 
 7:  ae21-2071.fra10.core-backbone.com                    11.648ms asymm  5 
 8:  ae2-2021.fra20.core-backbone.com                     11.953ms asymm  4 
 9:  ae6-2003.nbg20.core-backbone.com                     12.392ms asymm  6 
10:  ae2-2032.muc20.core-backbone.com                     15.015ms asymm  7 
11:  ae1-2028.vie10.core-backbone.com                     20.331ms asymm  8 
12:  2a01:4a0:1338:115::2                                 32.193ms 
13:  2a01-260-1-1--d.core6.t-2.net                        31.843ms asymm 11 
14:  2a01-260-1-1--93.core6.t-2.net                       32.167ms asymm 12 
15:  2a00:ee0:5:7::2                                      26.568ms asymm  9 
16:  no reply
17:  no reply
18:  no reply
19:  no reply
20:  no reply
21:  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) 17.1ms
4/4
Echo 1500B (DF) 17.3ms
no
Type 1 dest-unreach
-
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
22001:7f8:9e::151d:0:10.4ms0%-NA
3r4-fra2-de.as5405.net
2a11:4140::b
19.6ms0%AS5405INTERDOTLINK - Inter.link GmbH, DE
4r7-fra1-de.as5405.net
2a11:4140::4c
19.6ms0%AS5405INTERDOTLINK - Inter.link GmbH, DE
5r5-fra1-de.as5405.net
2a11:4140::42
19.6ms0%AS5405INTERDOTLINK - Inter.link GmbH, DE
6r2-vie1-at.as5405.net
2a11:4140::1e
19.6ms0%AS5405INTERDOTLINK - Inter.link GmbH, DE
7r1-lju1-si.as5405.net
2a11:4140::38
19.6ms0%AS5405INTERDOTLINK - Inter.link GmbH, DE
82a11:4142:2002::116.8ms0%AS5405INTERDOTLINK - Inter.link GmbH, DE
92a00:ee0:5:7::217.3ms0%AS5603SIOL-NET - Telekom Slovenije, d.d., SI
102a00:ee0:5:7::217.0ms0%AS5603SIOL-NET - Telekom Slovenije, d.d., SI
11*-0%-
12*---
13*---
14*---
15*---
16*---
17*---
18*---
19*---
20*---
21*---

tracepath -6

 1?: [LOCALHOST]                        0.027ms pmtu 1500
 1:  xe-0-0-12-142.gw01.dus01.as59645.net                  0.401ms 
 1:  xe-0-0-12-142.gw01.dus01.as59645.net                  0.266ms 
 2:  2001:7f8:9e::151d:0:1                                 0.501ms asymm  3 
 3:  r4-fra2-de.as5405.net                                19.733ms asymm 12 
 4:  r7-fra1-de.as5405.net                                19.619ms asymm 11 
 5:  r5-fra1-de.as5405.net                                19.710ms asymm 10 
 6:  r2-vie1-at.as5405.net                                19.844ms asymm  9 
 7:  r1-lju1-si.as5405.net                                19.646ms asymm  8 
 8:  2a11:4142:2002::1                                    16.884ms asymm  6 
 9:  2a00:ee0:5:7::2                                      17.428ms asymm  8 
10:  2a00:ee0:5:7::2                                      17.255ms asymm  8 
11:  no reply
12:  no reply
13:  no reply
14:  no reply
15:  no reply
16:  no reply
17:  no reply
18:  no reply
19:  no reply
20:  no reply
21:  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) 154.9ms
4/4
Echo 1500B (DF) 30.6ms
no
Type 1 dest-unreach
-
TCP responds on

Path (traceroute + mtr + PTR)

#IP / PTRRTTmtr lossASAS holder
12a00:8642:42::21.2ms0%AS203993GNA-DC1-AS - S.J.M. Steffann, NL
2*-0%*-
32a00:1ca8:1::1945.8ms0%AS50673Serverius-as - Serverius Holding B.V., NL
42a03:3f40::10:417.3ms0%AS50673Serverius-as - Serverius Holding B.V., NL
5speed-ix.inter.link
2001:7f8:b7::a500:5405:1
4.7ms0%-NA
6r5-ams1-nl.as5405.net
2a11:4140::41
30.6ms0%AS5405INTERDOTLINK - Inter.link GmbH, DE
7r7-ams1-nl.as5405.net
2a11:4140::55
30.7ms0%AS5405INTERDOTLINK - Inter.link GmbH, DE
8r7-fra1-de.as5405.net
2a11:4140::4c
32.6ms0%AS5405INTERDOTLINK - Inter.link GmbH, DE
9r5-fra1-de.as5405.net
2a11:4140::42
37.7ms0%AS5405INTERDOTLINK - Inter.link GmbH, DE
10r2-vie1-at.as5405.net
2a11:4140::1e
30.9ms0%AS5405INTERDOTLINK - Inter.link GmbH, DE
11r1-lju1-si.as5405.net
2a11:4140::38
30.1ms0%AS5405INTERDOTLINK - Inter.link GmbH, DE
122a11:4142:2002::130.2ms0%AS5405INTERDOTLINK - Inter.link GmbH, DE
132a00:ee0:5:7::230.9ms0%AS5603SIOL-NET - Telekom Slovenije, d.d., SI
142a00:ee0:5:7::229.7ms0%AS5603SIOL-NET - Telekom Slovenije, d.d., SI
15*-0%-
16*---
17*---
18*---
19*---
20*---
21*---

tracepath -6

 1?: [LOCALHOST]                        0.034ms pmtu 1500
 1:  2a00:8642:42::2                                       2.834ms 
 1:  2a00:8642:42::2                                       2.238ms 
 2:  no reply
 3:  2a00:1ca8:1::194                                      5.673ms 
 4:  2a03:3f40::10:41                                      2.556ms 
 5:  speed-ix.inter.link                                   4.991ms asymm  4 
 6:  r5-ams1-nl.as5405.net                                31.830ms asymm 15 
 7:  r7-ams1-nl.as5405.net                                33.821ms asymm 14 
 8:  r7-fra1-de.as5405.net                                30.628ms asymm 13 
 9:  r5-fra1-de.as5405.net                                33.739ms asymm 12 
10:  r2-vie1-at.as5405.net                                31.028ms asymm 11 
11:  r1-lju1-si.as5405.net                                34.254ms asymm 10 
12:  2a11:4142:2002::1                                    30.526ms asymm 10 
13:  2a00:ee0:5:7::2                                      31.584ms asymm 12 
14:  2a00:ee0:5:7::2                                      33.539ms asymm 12 
15:  no reply
16:  no reply
17:  no reply
18:  no reply
19:  no reply
20:  no reply
21:  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) 20.6ms
4/4
Echo 1500B (DF) 20.8ms
no
Type 1 dest-unreach
-
TCP responds on

Path (traceroute + mtr + PTR)

#IP / PTRRTTmtr lossASAS holder
1*---
2*---
3*-80%-
4interlink-AS5405.mix-it.net
2001:7f8:b:100:1d1:a5d0:5405:221
8.4ms0%-NA
5r1-lju1-si.as5405.net
2a11:4140::38
15.7ms0%AS5405INTERDOTLINK - Inter.link GmbH, DE
62a11:4142:2002::120.5ms0%AS5405INTERDOTLINK - Inter.link GmbH, DE
72a00:ee0:5:7::220.9ms0%AS5603SIOL-NET - Telekom Slovenije, d.d., SI
82a00:ee0:5:7::220.6ms0%AS5603SIOL-NET - Telekom Slovenije, d.d., SI
9*-0%-
10*---
11*---
12*---
13*---
14*---
15*---
16*---
17*---
18*---
19*---
20*---
21*---

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

tracepath -6

 1?: [LOCALHOST]                        0.028ms pmtu 1500
 1:  karsolink-01.net.karsolink.com                        0.555ms 
 2:  2a12:d8c0:109f:121::a1                                0.544ms 
 3:  2a12:d8c0:101f:103::1                                 8.822ms 
 4:  interlink-as5405.mix-it.net                           8.905ms asymm  5 
 5:  r1-lju1-si.as5405.net                                15.922ms asymm  6 
 6:  2a11:4142:2002::1                                    20.968ms 
 7:  2a00:ee0:5:7::2                                      21.363ms asymm  8 
 8:  2a00:ee0:5:7::2                                      22.621ms 
 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
19:  no reply
20:  no reply
21:  no reply
     Too many hops: pmtu 1500
     Resume: pmtu 1500 

From SLO host (6connect)   openRFC 4890 ✓

filter likely at: (none) · min PMTU on path: 9000

4/4
Echo small (56B) 1.6ms
4/4
Echo 1500B (DF) 2.1ms
no
Type 1 dest-unreach
-
TCP responds on

Path (traceroute + mtr + PTR)

#IP / PTRRTTmtr lossASAS holder
1fw1-lju.6connect.com
2607:fae0:a000::2
0.2ms0%*AS80386CONNECT - 6connect, Inc., US
2*---
32a00:ee1:800:9::11.7ms0%AS5603SIOL-NET - Telekom Slovenije, d.d., SI
42a01-260-4117--1e.link6.t-2.net
2a01:260:4117::1e
1.9ms0%*AS34779T-2-AS - T-2, d.o.o., SI
52a01-260-4117--1e.link6.t-2.net
2a01:260:4117::1e
1.3ms0%*AS34779T-2-AS - T-2, d.o.o., SI
6*-0%-
7*---
8*---
9*---
10*---
11*---
12*---
13*---
14*---
15*---
16*---
17*---
18*---
19*---
20*---
21*---

tracepath -6

 1?: [LOCALHOST]                        0.022ms pmtu 9000
 1:  fw1-lju.6connect.com                                  0.829ms 
 1:  fw1-lju.6connect.com                                  0.562ms 
 2:  no reply
 3:  2a00:ee1:800:9::1                                     2.614ms 
 4:  no reply
 5:  no reply
 6:  no reply
 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
19:  no reply
20:  no reply
21:  no reply
     Too many hops: pmtu 9000
     Resume: pmtu 9000 

From SLO host (T-2)   openRFC 4890 ✓

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

4/4
Echo small (56B) 3.0ms
4/4
Echo 1500B (DF) 3.4ms
no
Type 1 dest-unreach
-
TCP responds on

Path (traceroute + mtr + PTR)

#IP / PTRRTTmtr lossASAS holder
1*---
22a01:260:1::2255.0ms0%*AS34779T-2-AS - T-2, d.o.o., SI
32a01-260-1-1--9a.core6.t-2.net
2a01:260:1:1::9a
4.5ms0%*AS34779T-2-AS - T-2, d.o.o., SI
42a01-260-1-1--93.core6.t-2.net
2a01:260:1:1::93
4.9ms0%*AS34779T-2-AS - T-2, d.o.o., SI
52a01-260-4117--1e.link6.t-2.net
2a01:260:4117::1e
5.1ms0%*AS34779T-2-AS - T-2, d.o.o., SI
6*-0%-
7*---
8*---
9*---
10*---
11*---
12*---
13*---
14*---
15*---
16*---
17*---
18*---
19*---
20*---
21*---

tracepath -6

 1?: [LOCALHOST]                        0.023ms pmtu 1500
 1:  2a01:261:313:b814::1                                  0.570ms 
 2:  2a01:260:1::225                                       2.729ms 
 3:  2a01-260-1-1--9c.core6.t-2.net                        2.851ms 
 4:  2a01-260-1-1--95.core6.t-2.net                        2.655ms 
 5:  2a01-260-4117--1e.link6.t-2.net                       3.213ms 
 6:  no reply
 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
19:  no reply
20:  no reply
21:  no reply
     Too many hops: pmtu 1500
     Resume: pmtu 1500