AS211256 ELTA-SI - ELTA TELEKOMUNIKACIJE d.o.o.

AS overview

Test target: 2a02:64a1::1 · via IPv6 Hitlist (responsive) · address space: PA · prefixes announced: 2

prefix(es): 2a02:64a0::/32, 2a02:64a1::/32

Targets & per-vantage-point probe results (2 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 / hostname	Source	SRB host (SOX, Belgrade)					DE host (Berlin)					DE host (Düsseldorf)					NL host (go6lab)					ITA host (Karsolink)					SLO host (6connect)					SLO host (T-2)
Target IP / hostname	Source	ping	1500B	:80	:443	reached	ping	1500B	:80	:443	reached	ping	1500B	:80	:443	reached	ping	1500B	:80	:443	reached	ping	1500B	:80	:443	reached	ping	1500B	:80	:443	reached	ping	1500B	:80	:443	reached
`2a02:64a0::1`	prb	✓	✓	refused	refused	✓	✓	✓	refused	refused	✓	✓	✓	refused	refused	✓	✓	✓	?	?	✓	✓	✓	refused	refused	✓	✓	✓	refused	refused	✓	✓	✓	refused	refused	✓
`2a02:64a1::1`	hit	✓	✓	refused	refused	✓	✓	✓	refused	refused	✓	✓	✓	refused	refused	✓	✓	✓	?	?	✓	✓	✓	refused	refused	✓	✓	✓	refused	refused	✓	✓	✓	refused	refused	✓

SIX peering

Not an SIX member, but our traceroute path crosses the SIX LAN from SLO host (T-2) - reached via an SIX-resident transit operator.

RPKI & ASPA

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

Prefix	RPKI state	Reason	Covering VRP(s)
`2a02:64a1::/32`	- not-found	no covering VRP
`2a02:64a0::/32`	- not-found	no covering VRP

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

We probed 70 arbitrary IPv6 address(es) inside AS211256's announced prefix(es). No router inside the prefix responded. The deepest visible hop was 2a11:4142:2002::1 at hop 15 - that router answers ICMPv6 Echo. This is not in AS211256'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 2026-09-23T10:34:48Z

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 ↗

● SRB host (SOX, Belgrade)
● DE host (Berlin)
● DE host (Düsseldorf)
● NL host (go6lab)
● ITA host (Karsolink)
● SLO host (6connect)
● SLO host (T-2)
── solid line = echo reply, PTB honored (clean reach)
— — dashed line = echo reply but PTB not honored (RFC 4890 violation)
no line = no echo reply (never reached)
◉ target: green = clean, amber = reachable-but-violation / unreachable
⚠ suspected drop AS
⋯ silent (unanswered) hops
● IXP hop

From SRB host (SOX, Belgrade) openRFC 4890 ✓

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

4/4

Echo small (56B) 29.3ms

4/4

Echo 1500B (DF) 29.6ms

yes

Type 1 dest-unreach

443,80

TCP responds on

Path (traceroute + mtr + PTR)

#	IP / PTR	RTT	mtr loss	AS	AS holder
1	2a09:ab81::1	0.4ms	0%*	AS60733	PERKE-NET - ZORAN PEROVIC trading as Agencija Perke.NET, RS
2	2001:7f8:1e::4	0.5ms	0%	AS13004	SOX - Serbian Open Exchange DOO, RS
3	ts6-vix-mb.telekom.si 2001:7f8:30:0:2:1:0:5603	27.7ms	0%	-	NA
4	2a02:64a1::1	29.3ms	0%	AS211256	ELTA-SI - ELTA TELEKOMUNIKACIJE d.o.o., SI

tracepath -6

 1?: [LOCALHOST]                        0.011ms pmtu 1500
 1:  _gateway                                              2.287ms 
 1:  _gateway                                              0.290ms 
 2:  2001:7f8:1e::4                                        0.579ms 
 3:  ts6-vix-mb.telekom.si                                27.824ms asymm  6 
 4:  2a02:64a1::1                                         29.417ms reached
     Resume: pmtu 1500 hops 4 back 7

From DE host (Berlin) openRFC 4890 ✓

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

4/4

Echo small (56B) 31.8ms

4/4

Echo 1500B (DF) 31.8ms

yes

Type 1 dest-unreach

443,80

TCP responds on

Path (traceroute + mtr + PTR)

#	IP / PTR	RTT	mtr loss	AS	AS holder
1	xe-0-0-13-178.gw01.ber01.as59645.net 2a06:d1c1:100:b::1	0.3ms	0%*	AS59645	WYBT-NET - Tobias Fiebig, DE
2	ae0-2453.cr10.ber01.lwlcom.net 2a06:d1c0::dead:beef:1c02	1.1ms	0%*	AS59645	WYBT-NET - Tobias Fiebig, DE
3	ae0-10.cr10.ber03.lwlcom.net 2a00:c380:b200:230::220	1.0ms	0%	AS50629	LWLCOM - LWLcom GmbH, DE
4	ae0-15.cr11.dtm01.lwlcom.net 2a00:c380:b200:230::5	8.6ms	0%	AS50629	LWLCOM - LWLcom GmbH, DE
5	ae0-10.cr10.dtm02.lwlcom.net 2a00:c380:b200:230::255	8.5ms	0%	AS50629	LWLCOM - LWLcom GmbH, DE
6	ae0-50.cr10.dus02.lwlcom.net 2a00:c380:b200:230::24	8.2ms	0%	AS50629	LWLCOM - LWLcom GmbH, DE
7	ae0-20.cr10.dus01.lwlcom.net 2a00:c380:b200:230::108	8.6ms	0%	AS50629	LWLCOM - LWLcom GmbH, DE
8	ae6-60.cr10.ams01.lwlcom.net 2a00:c380:b200:230::213	13.3ms	0%	AS50629	LWLCOM - LWLcom GmbH, DE
9	as5405.frys-ix.net 2001:7f8:10f::151d:9	11.6ms	0%	-	NA
10	r7-ams1-nl.as5405.net 2a11:4140::55	32.3ms	0%	AS5405	INTERDOTLINK - Inter.link GmbH, DE
11	r7-fra1-de.as5405.net 2a11:4140::4c	32.2ms	0%	AS5405	INTERDOTLINK - Inter.link GmbH, DE
12	r5-fra1-de.as5405.net 2a11:4140::42	32.2ms	0%	AS5405	INTERDOTLINK - Inter.link GmbH, DE
13	r2-vie1-at.as5405.net 2a11:4140::1e	32.0ms	0%	AS5405	INTERDOTLINK - Inter.link GmbH, DE
14	r1-lju1-si.as5405.net 2a11:4140::38	32.0ms	0%	AS5405	INTERDOTLINK - Inter.link GmbH, DE
15	2a11:4142:2002::1	29.5ms	0%	AS5405	INTERDOTLINK - Inter.link GmbH, DE
16	2a02:64a1::1	31.9ms	0%	AS211256	ELTA-SI - ELTA TELEKOMUNIKACIJE d.o.o., SI

tracepath -6

 1?: [LOCALHOST]                        0.021ms pmtu 1500
 1:  xe-0-0-13-178.gw01.ber01.as59645.net                  0.445ms 
 1:  xe-0-0-13-178.gw01.ber01.as59645.net                  1.549ms 
 2:  ae0-2453.cr10.ber01.lwlcom.net                        0.891ms 
 3:  ae0-10.cr10.ber03.lwlcom.net                          0.973ms 
 4:  ae0-15.cr11.dtm01.lwlcom.net                          8.857ms asymm  5 
 5:  ae0-10.cr10.dtm02.lwlcom.net                          8.846ms asymm  6 
 6:  ae0-20.cr10.dus04.lwlcom.net                          8.667ms asymm  5 
 7:  ae0-10.cr10.dus01.lwlcom.net                          8.953ms asymm  4 
 8:  ae6-60.cr10.ams01.lwlcom.net                         11.695ms asymm  5 
 9:  as5405.frys-ix.net                                   11.664ms 
10:  r7-ams1-nl.as5405.net                                32.311ms asymm 13 
11:  r7-fra1-de.as5405.net                                32.467ms asymm 12 
12:  r5-fra1-de.as5405.net                                32.684ms asymm 11 
13:  r2-vie1-at.as5405.net                                32.629ms asymm 10 
14:  r1-lju1-si.as5405.net                                32.572ms asymm  9 
15:  2a11:4142:2002::1                                    29.760ms asymm  7 
16:  2a02:64a1::1                                         32.277ms reached
     Resume: pmtu 1500 hops 16 back 9

From DE host (Düsseldorf) openRFC 4890 ✓

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

4/4

Echo small (56B) 19.5ms

4/4

Echo 1500B (DF) 19.5ms

yes

Type 1 dest-unreach

443,80

TCP responds on

Path (traceroute + mtr + PTR)

#	IP / PTR	RTT	mtr loss	AS	AS holder
1	xe-0-0-12-142.gw01.dus01.as59645.net 2a06:d1c1:100:d::1	0.3ms	0%*	AS59645	WYBT-NET - Tobias Fiebig, DE
2	2001:7f8:9e::151d:0:1	0.5ms	0%	-	NA
3	r4-fra2-de.as5405.net 2a11:4140::b	19.7ms	0%	AS5405	INTERDOTLINK - Inter.link GmbH, DE
4	r7-fra1-de.as5405.net 2a11:4140::4c	19.6ms	0%	AS5405	INTERDOTLINK - Inter.link GmbH, DE
5	r5-fra1-de.as5405.net 2a11:4140::42	19.7ms	0%	AS5405	INTERDOTLINK - Inter.link GmbH, DE
6	r2-vie1-at.as5405.net 2a11:4140::1e	19.6ms	0%	AS5405	INTERDOTLINK - Inter.link GmbH, DE
7	r1-lju1-si.as5405.net 2a11:4140::38	19.6ms	0%	AS5405	INTERDOTLINK - Inter.link GmbH, DE
8	2a11:4142:2002::1	16.9ms	0%	AS5405	INTERDOTLINK - Inter.link GmbH, DE
9	2a02:64a1::1	19.5ms	0%	AS211256	ELTA-SI - ELTA TELEKOMUNIKACIJE d.o.o., SI

tracepath -6

 1?: [LOCALHOST]                        0.016ms pmtu 1500
 1:  xe-0-0-12-142.gw01.dus01.as59645.net                  0.470ms 
 1:  xe-0-0-12-142.gw01.dus01.as59645.net                  0.339ms 
 2:  2001:7f8:9e::151d:0:1                                 0.584ms asymm  3 
 3:  r4-fra2-de.as5405.net                                19.788ms asymm 12 
 4:  r7-fra1-de.as5405.net                                19.958ms asymm 11 
 5:  r5-fra1-de.as5405.net                                19.952ms asymm 10 
 6:  r2-vie1-at.as5405.net                                20.194ms asymm  9 
 7:  r1-lju1-si.as5405.net                                19.890ms asymm  8 
 8:  2a11:4142:2002::1                                    17.137ms asymm  6 
 9:  2a02:64a1::1                                         19.734ms reached
     Resume: pmtu 1500 hops 9 back 8

From NL host (go6lab) openRFC 4890 ✓

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

4/4

Echo small (56B) 34.2ms

4/4

Echo 1500B (DF) 32.3ms

yes

Type 1 dest-unreach

TCP responds on

Path (traceroute + mtr + PTR)

#	IP / PTR	RTT	mtr loss	AS	AS holder
1	2a00:8642:42::2	9.7ms	0%	AS203993	GNA-DC1-AS - S.J.M. Steffann, NL
2	*	-	0%*	-
3	2a00:1ca8:1::194	2.8ms	0%	AS50673	Serverius-as - Serverius Holding B.V., NL
4	2a03:3f40::10:41	2.8ms	0%	AS50673	Serverius-as - Serverius Holding B.V., NL
5	speed-ix.inter.link 2001:7f8:b7::a500:5405:1	4.0ms	0%	-	NA
6	r5-ams1-nl.as5405.net 2a11:4140::41	29.6ms	0%	AS5405	INTERDOTLINK - Inter.link GmbH, DE
7	r7-ams1-nl.as5405.net 2a11:4140::55	33.8ms	0%	AS5405	INTERDOTLINK - Inter.link GmbH, DE
8	r7-fra1-de.as5405.net 2a11:4140::4c	29.3ms	0%	AS5405	INTERDOTLINK - Inter.link GmbH, DE
9	r5-fra1-de.as5405.net 2a11:4140::42	29.7ms	0%	AS5405	INTERDOTLINK - Inter.link GmbH, DE
10	r2-vie1-at.as5405.net 2a11:4140::1e	30.9ms	0%	AS5405	INTERDOTLINK - Inter.link GmbH, DE
11	r1-lju1-si.as5405.net 2a11:4140::38	29.4ms	0%	AS5405	INTERDOTLINK - Inter.link GmbH, DE
12	2a11:4142:2002::1	31.3ms	0%	AS5405	INTERDOTLINK - Inter.link GmbH, DE
13	2a02:64a1::1	47.3ms	0%	AS211256	ELTA-SI - ELTA TELEKOMUNIKACIJE d.o.o., SI

tracepath -6

 1?: [LOCALHOST]                        0.052ms pmtu 1500
 1:  2a00:8642:42::2                                       1.762ms 
 1:  2a00:8642:42::2                                       2.087ms 
 2:  no reply
 3:  2a00:1ca8:1::194                                      4.175ms 
 4:  2a03:3f40::10:41                                      5.146ms 
 5:  speed-ix.inter.link                                   5.841ms asymm  4 
 6:  r5-ams1-nl.as5405.net                                32.959ms asymm 15 
 7:  r7-ams1-nl.as5405.net                                31.144ms asymm 14 
 8:  r7-fra1-de.as5405.net                                31.707ms asymm 13 
 9:  r5-fra1-de.as5405.net                                31.166ms asymm 12 
10:  r2-vie1-at.as5405.net                                34.390ms asymm 11 
11:  r1-lju1-si.as5405.net                                32.918ms asymm 10 
12:  2a11:4142:2002::1                                    32.346ms asymm 10 
13:  2a02:64a1::1                                         70.033ms reached
     Resume: pmtu 1500 hops 13 back 12

From ITA host (Karsolink) openRFC 4890 ✓

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

4/4

Echo small (56B) 23.1ms

4/4

Echo 1500B (DF) 23.1ms

yes

Type 1 dest-unreach

443,80

TCP responds on

Path (traceroute + mtr + PTR)

#	IP / PTR	RTT	mtr loss	AS	AS holder
1	*	-	-	-
2	*	-	0%*	-
3	2a12:d8c0:101f:103::1	8.4ms	20%	AS204471	KARSOLINK - 2S Computers SRL, IT
4	interlink-AS5405.mix-it.net 2001:7f8:b:100:1d1:a5d0:5405:221	8.5ms	0%	-	NA
5	r1-lju1-si.as5405.net 2a11:4140::38	15.6ms	0%	AS5405	INTERDOTLINK - Inter.link GmbH, DE
6	2a11:4142:2002::1	20.7ms	0%	AS5405	INTERDOTLINK - Inter.link GmbH, DE
7	2a02:64a1::1	23.2ms	0%	AS211256	ELTA-SI - ELTA TELEKOMUNIKACIJE d.o.o., SI

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:  no reply
 2:  2a12:d8c0:109f:121::a1                                0.989ms 
 3:  no reply
 4:  interlink-as5405.mix-it.net                           9.033ms asymm  5 
 5:  r1-lju1-si.as5405.net                                16.132ms asymm  6 
 6:  2a11:4142:2002::1                                    21.143ms 
 7:  2a02:64a1::1                                         23.479ms reached
     Resume: pmtu 1500 hops 7 back 8

From SLO host (6connect) openRFC 4890 ✓

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

4/4

Echo small (56B) 3.3ms

4/4

Echo 1500B (DF) 3.3ms

yes

Type 1 dest-unreach

443,80

TCP responds on

Path (traceroute + mtr + PTR)

#	IP / PTR	RTT	mtr loss	AS	AS holder
1	fw1-lju.6connect.com 2607:fae0:a000::2	0.5ms	0%*	AS8038	6CONNECT - 6connect, Inc., US
2	*	-	-	-
3	2a00:ee1:800:9::1	1.8ms	0%	AS5603	SIOL-NET - Telekom Slovenije, d.d., SI
4	2a02:64a1::1	3.4ms	0%	AS211256	ELTA-SI - ELTA TELEKOMUNIKACIJE d.o.o., SI

tracepath -6

 1?: [LOCALHOST]                        0.024ms pmtu 9000
 1:  fw1-lju.6connect.com                                  0.860ms 
 1:  fw1-lju.6connect.com                                  0.699ms 
 2:  no reply
 3:  2a00:ee1:800:9::1                                     2.418ms 
 4:  no reply
 5:  2a00:ee1:6300:6::1                                    3.949ms pmtu 1500
 5:  2a02:64a1::1                                          3.526ms reached
     Resume: pmtu 1500 hops 5 back 5

From SLO host (T-2) openRFC 4890 ✓

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

4/4

Echo small (56B) 5.1ms

4/4

Echo 1500B (DF) 5.6ms

yes

Type 1 dest-unreach

443,80

TCP responds on

Path (traceroute + mtr + PTR)

#	IP / PTR	RTT	mtr loss	AS	AS holder
1	*	-	0%*	-
2	2a01:260:1::225	12.9ms	0%*	AS34779	T-2-AS - T-2, d.o.o., SI
3	2a01-260-1-1--9a.core6.t-2.net 2a01:260:1:1::9a	2.3ms	0%*	AS34779	T-2-AS - T-2, d.o.o., SI
4	2001:7f8:46:0:1::5603 @SIX	2.4ms	0%	AS51988	ARNES-SIX - ARNES, SI
5	2a02:64a1::1	5.5ms	0%	AS211256	ELTA-SI - ELTA TELEKOMUNIKACIJE d.o.o., SI

tracepath -6

 1?: [LOCALHOST]                        0.026ms pmtu 1500
 1:  2a01:261:313:b814::1                                  1.005ms 
 1:  no reply
 2:  2a01:260:1::225                                       3.163ms 
 3:  2a01-260-1-1--9a.core6.t-2.net                        3.025ms 
 4:  2001:7f8:46:0:1::5603                                 2.734ms 
 5:  2a02:64a1::1                                          7.373ms reached
     Resume: pmtu 1500 hops 5 back 6