asn.dev

Observed topology

AS43061 SI-STELKOM

Upstreams 9 carry this network
Downstreams 40 this network carries
Adjacent (IPv4) 53
Adjacent (IPv6) 13

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS43061: the AS immediately before it in a routing path. Ranked by how many paths showed the relationship, which reflects how widely it is used, not how much traffic crosses it.

ASNetworkTypeFamiliesPaths seen
AS6663Euroweb Romania S.R.L.UnclassifiedIPv4 IPv640
AS6939Hurricane Electric LLCTransitIPv4 IPv620
AS174Cogent Communications, LLCTransitIPv4 IPv619
AS6762TELECOM ITALIA SPARKLE S.p.A.TransitIPv4 IPv68
AS3303Swisscom (Schweiz) AGResidentialIPv4 IPv63
AS9002RETN LimitedUnclassifiedIPv62
AS24482SG.GSHostingIPv4 IPv62
AS48362Stadtwerke FeldkirchResidentialIPv4 IPv62
AS59919Brainbox S.r.l.ResidentialIPv41

Inferred from path position, not from any declaration by either party. A network appearing here is carrying these routes; whether that is a paid transit arrangement, a backup, or something else is not something routing data can tell you.

Transit

Downstream networks

inferred

Networks for which AS43061 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS197663POLANS, telekomunikacijske storitve d.o.o.UnclassifiedIPv4186
AS203970WEILER Abrasives d.o.o.UnclassifiedIPv462
AS51816ACTUAL I.T. d.d.UnclassifiedIPv462
AS49407PharmaSwiss d.o.o. LjubljanaUnclassifiedIPv462
AS198572Ika, trgovsko podjetje, Ziri, d.o.o.UnclassifiedIPv462
AS47917RTV SlovenijaUnclassifiedIPv4 IPv658
AS50592Javni Zavod Lekrana LjubljanaUnclassifiedIPv453
AS197655GEN-I d.o.o.UnclassifiedIPv453
AS41716Ministry of foreign affairs of Republic of SloveniaUnclassifiedIPv449
AS51615Zavod Kabelska televizija Nova goricaUnclassifiedIPv4 IPv629
AS48398DINIT d.o.o.UnclassifiedIPv428
AS196772Nuklearna Elektrarna Krsko d.o.o.UnclassifiedIPv428
AS49636Ljubljanski urbanisticni zavod d.d.UnclassifiedIPv423
AS48609KPMG SLOVENIJA, podjetje za revidiranje, d.o.oUnclassifiedIPv423
AS51143Informatika d.o.o.UnclassifiedIPv4 IPv623
AS199638Rudis D.o.o.UnclassifiedIPv422
AS44463Dinit d.o.o.UnclassifiedIPv422
AS197514Nova Ljubljanska Banka d.d.UnclassifiedIPv422
AS197635ETI Elektroelement d.d.UnclassifiedIPv422
AS33850UNIOR Kovaska industrija d.d., ZreceUnclassifiedIPv422
AS48774Gen energija d.o.o.UnclassifiedIPv422
AS203671Talum d.d. KidricevoUnclassifiedIPv416
AS47336Soske Elektrarne Nova Gorica d.o.o.UnclassifiedIPv416
AS35099Porsche Slovenija d.o.o.UnclassifiedIPv416
AS213306Comtrade System Integration doo Belgrade SerbiaUnclassifiedIPv416
AS205404Arhides d.o.o.UnclassifiedIPv416
AS39320ACTUAL I.T. d.d.UnclassifiedIPv415
AS47904ARCTUR d.o.o.UnclassifiedIPv4 IPv614
AS197843Alcad podjetje za projektiranje, trgovino in storitve d.o.o.UnclassifiedIPv412
AS199612Dun & Bradstreet d.o.o.UnclassifiedIPv4 IPv612
AS205379Salonit Anhovo, d.d.UnclassifiedIPv48
AS49402Comtrade nepremicnine d.o.o.UnclassifiedIPv48
AS42791Loterija SlovenijeUnclassifiedIPv47
AS197796Termoelektrarna Brestanica d.o.o.UnclassifiedIPv46
AS57854ACTUAL I.T. d.d.UnclassifiedIPv46
AS15664Business Solutions d.o.o.UnclassifiedIPv46
AS197266A-SOFT d.o.o.UnclassifiedIPv46
AS28985HOLDING SLOVENSKE ELEKTRARNE d.o.o.UnclassifiedIPv44
AS43462Smart Com d.o.o.UnclassifiedIPv43
AS49593ALPINA d.o.o.UnclassifiedIPv41

Adjacency

Adjacent networks

66 shown

Every AS seen directly next to AS43061 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS6663Euroweb Romania S.R.L.UnclassifiedIPv4 IPv6650
AS174Cogent Communications, LLCTransitIPv4 IPv6295
AS197663POLANS, telekomunikacijske storitve d.o.o.UnclassifiedIPv4186
AS6939Hurricane Electric LLCTransitIPv4 IPv6125
AS6762TELECOM ITALIA SPARKLE S.p.A.TransitIPv4 IPv694
AS49407PharmaSwiss d.o.o. LjubljanaUnclassifiedIPv462
AS198572Ika, trgovsko podjetje, Ziri, d.o.o.UnclassifiedIPv462
AS203970WEILER Abrasives d.o.o.UnclassifiedIPv462
AS51816ACTUAL I.T. d.d.UnclassifiedIPv462
AS47917RTV SlovenijaUnclassifiedIPv4 IPv658
AS197655GEN-I d.o.o.UnclassifiedIPv453
AS50592Javni Zavod Lekrana LjubljanaUnclassifiedIPv453
AS41716Ministry of foreign affairs of Republic of SloveniaUnclassifiedIPv449
AS3303Swisscom (Schweiz) AGResidentialIPv4 IPv639
AS59919Brainbox S.r.l.ResidentialIPv435
AS51615Zavod Kabelska televizija Nova goricaUnclassifiedIPv4 IPv629
AS196772Nuklearna Elektrarna Krsko d.o.o.UnclassifiedIPv428
AS48398DINIT d.o.o.UnclassifiedIPv428
AS213306Comtrade System Integration doo Belgrade SerbiaUnclassifiedIPv423
AS49636Ljubljanski urbanisticni zavod d.d.UnclassifiedIPv423
AS48609KPMG SLOVENIJA, podjetje za revidiranje, d.o.oUnclassifiedIPv423
AS48362Stadtwerke FeldkirchResidentialIPv4 IPv623
AS51143Informatika d.o.o.UnclassifiedIPv4 IPv623
AS199638Rudis D.o.o.UnclassifiedIPv422
AS197514Nova Ljubljanska Banka d.d.UnclassifiedIPv422
AS48774Gen energija d.o.o.UnclassifiedIPv422
AS33850UNIOR Kovaska industrija d.d., ZreceUnclassifiedIPv422
AS44463Dinit d.o.o.UnclassifiedIPv422
AS197635ETI Elektroelement d.d.UnclassifiedIPv422
AS24482SG.GSHostingIPv4 IPv621
AS5603Telekom Slovenije, d.d.MobileIPv419
AS21283A1 Slovenija telekomunikacijske storitve,d.d.ResidentialIPv419
AS47336Soske Elektrarne Nova Gorica d.o.o.UnclassifiedIPv416
AS205404Arhides d.o.o.UnclassifiedIPv416
AS35099Porsche Slovenija d.o.o.UnclassifiedIPv416
AS203671Talum d.d. KidricevoUnclassifiedIPv416
AS39320ACTUAL I.T. d.d.UnclassifiedIPv415
AS47904ARCTUR d.o.o.UnclassifiedIPv4 IPv614
AS12778MEGA M, d.o.o.UnclassifiedIPv412
AS197843Alcad podjetje za projektiranje, trgovino in storitve d.o.o.UnclassifiedIPv412
AS199612Dun & Bradstreet d.o.o.UnclassifiedIPv4 IPv612
AS34779T-2, d.o.o.ResidentialIPv410
AS205379Salonit Anhovo, d.d.UnclassifiedIPv48
AS49402Comtrade nepremicnine d.o.o.UnclassifiedIPv48
AS42791Loterija SlovenijeUnclassifiedIPv47
AS57854ACTUAL I.T. d.d.UnclassifiedIPv46
AS197796Termoelektrarna Brestanica d.o.o.UnclassifiedIPv46
AS197266A-SOFT d.o.o.UnclassifiedIPv46
AS15664Business Solutions d.o.o.UnclassifiedIPv46
AS28985HOLDING SLOVENSKE ELEKTRARNE d.o.o.UnclassifiedIPv44
AS43462Smart Com d.o.o.UnclassifiedIPv43
AS9002RETN LimitedUnclassifiedIPv62
AS49593ALPINA d.o.o.UnclassifiedIPv41
AS15935ha-vel internet s.r.o.UnclassifiedIPv41

Adjacency is not the same as peering. Being next to each other in a path covers paid transit, settlement-free peering and customer connections alike, and routing data cannot distinguish them. Treat this as "these networks exchange routes", nothing more specific.

Interconnection

Exchange presence

recorded

Internet exchanges where Packet Clearing House has a port recorded for AS43061, largest fabric first. An exchange is shared switching where networks interconnect directly rather than paying a transit provider to carry traffic between them, so turning up at one is a deliberate choice about how this network wants to be reached. Each name opens that exchange's own page, with its peering LANs and every other network recorded on it. Recorded at 5 exchanges across 5 countries and 1 region.

ExchangeLocationTheir addressMember ports
Milan Internet ExchangeMilan, Italy217.29.66.189416
Vienna Internet ExchangeVienna, Austria193.203.0.191188
Serbian Open ExchangeBelgrade, Serbia185.1.27.3651
Croatian Internet ExchangeZagreb, Croatia185.1.87.10146
Slovenian Internet ExchangeLjubljana, Slovenia91.220.194.1939

Unlike the tables above, this is recorded rather than inferred. An address on a peering LAN is at that exchange by definition. Two carve-outs all the same. Member ports counts every participant at the exchange, not this network's ports, so read it as a size proxy. And an absent exchange means PCH has no record of it, not that the network is not there.

Provenance

Where this comes from

Derived from routing tables collected at 2026-08-08 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 74.02M route entries. These are observations from those vantage points, not a complete or authoritative view of the internet.

Cross-check against RIPEstat or BGP.tools, which observe from a different and larger set of vantage points.

Exchange presence comes from a separate dataset: the directory collected 2026-08-09 by Packet Clearing House (https://www.pch.net/ixp/data), covering 1,327 exchanges and 93,164 recorded member ports, licensed CC BY-NC-SA 3.0.

PeeringDB is the better-known directory and is deliberately not the source here: its acceptable-use policy forbids the bulk storage this needs. The two answer different questions anyway. PeeringDB reports what an operator declares about itself; this reports what PCH has recorded.