asn.dev

Observed topology

AS15935 HA-VEL-LOCAL-AS Czech republic

Upstreams 13 carry this network
Downstreams 117 this network carries
Adjacent (IPv4) 131
Adjacent (IPv6) 103

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS15935: 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
AS9002RETN LimitedUnclassifiedIPv4 IPv6219
AS174Cogent Communications, LLCTransitIPv4 IPv6179
AS6939Hurricane Electric LLCTransitIPv4 IPv6168
AS29504Freenet Liberec, z.s.UnclassifiedIPv4 IPv668
AS6461Zayo BandwidthTransitIPv423
AS1299Arelion Sweden ABTransitIPv4 IPv623
AS24482SG.GSHostingIPv4 IPv616
AS8218Zayo Infrastructure France SAUnclassifiedIPv4 IPv616
AS6830Liberty Global Europe Holding B.V.ResidentialIPv415
AS31230Slovak University of Technology in BratislavaUnclassifiedIPv413
AS33891Core-Backbone GmbHHostingIPv412
AS57463NetIX Communications JSCUnclassifiedIPv411
AS47200NIX.CZ z.s.p.o.UnclassifiedIPv43

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 AS15935 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS174Cogent Communications, LLCTransitIPv4 IPv63,724
AS16509Amazon.com, Inc.HostingIPv4 IPv63,075
AS13335Cloudflare, Inc.HostingIPv4 IPv61,839
AS15169Google LLCHostingIPv4917
AS8560IONOS SEHostingIPv4 IPv6465
AS6461Zayo BandwidthTransitIPv4 IPv6220
AS198143Ceska Posta s.p.UnclassifiedIPv4 IPv6154
AS201727Blond & Brown s.r.o.UnclassifiedIPv4 IPv6154
AS197451Brno University of TechnologyEducationIPv4 IPv6150
AS5606GTS Telecom SRLUnclassifiedIPv4 IPv6136
AS2686AT&T Enterprises, LLCUnclassifiedIPv4123
AS198284Mesto Velka BystriceUnclassifiedIPv4 IPv6119
AS3223Voxility LLPHostingIPv4 IPv6115
AS6830Liberty Global Europe Holding B.V.ResidentialIPv4 IPv6114
AS16019Vodafone Czech Republic a.s.UnclassifiedIPv4 IPv6106
AS33353Sony Interactive Entertainment LLCHostingIPv4 IPv6105
AS56360TRINITY CZECH REPUBLIC, s.r.o.UnclassifiedIPv4 IPv695
AS2614Agentia de Administrare a Retelei Nationale de Informatica pentru Educatie si CercetareEducationIPv491
AS8400TELEKOM SRBIJA a.d.ResidentialIPv4 IPv691
AS5603Telekom Slovenije, d.d.MobileIPv4 IPv691
AS200844STUDENT AGENCY k.s.UnclassifiedIPv4 IPv679
AS44901Belcloud LTDHostingIPv4 IPv676
AS203550i2net cz s.r.o.UnclassifiedIPv4 IPv661
AS215806Albert Ceska republika, s.r.o.UnclassifiedIPv460
AS51968NEOS v.o.s.UnclassifiedIPv460
AS56747Nelson Services, s.r.o.UnclassifiedIPv460
AS2906Netflix Streaming Services Inc.HostingIPv4 IPv653
AS9146BH Telecom d.d. SarajevoResidentialIPv448
AS6855Slovak Telekom, a.s.MobileIPv4 IPv646
AS5405Inter.link GmbHUnclassifiedIPv4 IPv645
AS50163Altnet s.r.o.UnclassifiedIPv442
AS15576NTS workspace AGUnclassifiedIPv441
AS52058za200.cz s.r.o.UnclassifiedIPv439
AS29208Quantcom, a.s.UnclassifiedIPv4 IPv638
AS51744Non-profit organization Jablonka.czUnclassifiedIPv4 IPv638
AS20940Akamai International B.V.HostingIPv4 IPv629
AS2635Automattic, IncHostingIPv4 IPv622
AS208663Martin Ph. D. PustkaUnclassifiedIPv4 IPv621
AS43848Gamsjaeger Kabel-TV & ISP Betriebs GmbHResidentialIPv419
AS9002RETN LimitedUnclassifiedIPv4 IPv618
AS6774Belgacom International Carrier Services SAUnclassifiedIPv4 IPv615
AS207203TIMEWARP IT Consulting GmbHUnclassifiedIPv4 IPv614
AS61423JMP Technology Services GmbHUnclassifiedIPv4 IPv614
AS215628Xenox IT & Kommunikations GmbHHostingIPv4 IPv613
AS35328DSI DATA, a. s.ResidentialIPv412
AS21385Trusted Network GmbHUnclassifiedIPv4 IPv612
AS48326DataNetworks s.r.o.ResidentialIPv4 IPv610
AS15498RTCnow Streaming Services GmbHUnclassifiedIPv4 IPv69
AS29504Freenet Liberec, z.s.UnclassifiedIPv4 IPv69
AS201603AIRNET s.r.o.UnclassifiedIPv48
AS34347HALLAG Kommunal GmbHResidentialIPv48
AS25255Hutchison Drei Austria GmbHResidentialIPv48
AS199711National Cyber and Information Security AgencyUnclassifiedIPv47
AS34288Kantonsschule ZugUnclassifiedIPv4 IPv67
AS8387Deutsche Telekom Global Business Solutions GmbHUnclassifiedIPv46
AS28889LinzNet Internet Service Provider GmbHUnclassifiedIPv46
AS29081WVNET Information und Kommunikation GmbHResidentialIPv46
AS5385Russmedia IT GmbHUnclassifiedIPv46
AS211510Roman Franz Dissauer trading as RDI Solutions e.U.UnclassifiedIPv4 IPv66
AS61211SETCOR d.o.o.UnclassifiedIPv45
AS31510Innsbrucker Kommunalbetriebe AGResidentialIPv45
AS51265Mass Response Service GmbHResidentialIPv45
AS44765MakeNewMedia Communications GmbHUnclassifiedIPv45
AS47147Anexia Cloud Solutions GmbHUnclassifiedIPv4 IPv65
AS9009M247 Europe SRLHostingIPv4 IPv65
AS60274EDV Consulting Zoichter GmbHUnclassifiedIPv4 IPv65
AS56349IP-Net s.r.o.ResidentialIPv4 IPv65
AS8793Thinxx GmbHUnclassifiedIPv44
AS15958CETIN Ltd. BelgradeUnclassifiedIPv44
AS6798Net4You Internet GmbHUnclassifiedIPv4 IPv64
AS15702euNetworks GmbHUnclassifiedIPv4 IPv64
AS54113Fastly, Inc.HostingIPv4 IPv64
AS42473Anexia Cloud Solutions GmbHHostingIPv4 IPv64
AS49044DIGI SLOVAKIA, s.r.o.UnclassifiedIPv43
AS12401internic Datenkommunikations GmbHUnclassifiedIPv43
AS30081CacheFlyHostingIPv4 IPv63
AS209531OSTV s.r.o.ResidentialIPv42
AS30929GOLEM TECH s.r.o.ResidentialIPv42
AS12577MMC GmbHUnclassifiedIPv42
AS56926KOMNET, s.r.o.ResidentialIPv42
AS29086GiTy, a.s.UnclassifiedIPv42
AS1120ACONETUnclassifiedIPv42
AS8674Netnod ABUnclassifiedIPv42
AS42WoodyNet, Inc.UnclassifiedIPv42
AS204457Atlantis Telekomunikasyon Bilisim Hizmetleri San. ve Tic. Ltd. Sti.ResidentialIPv42
AS65180unnamedUnclassifiedIPv62
AS20546SOPRADO GmbHHostingIPv42
AS35339AtNOC GmbHUnclassifiedIPv62
AS54994Meteverse Limited.UnclassifiedIPv42
AS60533SateliX s.r.o.ResidentialIPv42
AS62373futurenet.gmbHResidentialIPv42
AS208882Automation & Business, s.r.o.ResidentialIPv4 IPv62
AS2576155 IT Services GmbHUnclassifiedIPv4 IPv62
AS49322ViM Internetdienstleistungen GmbHHostingIPv4 IPv62
AS60517Noehmer Cablevision GmbHResidentialIPv41
AS200851Bamboozle Web Services MEA FZ-LLCHostingIPv41
AS48152Digital Frankfurt GmbHResidentialIPv61
AS5610O2 Czech Republic, a.s.UnclassifiedIPv41
AS1299Arelion Sweden ABTransitIPv41

Adjacency

Adjacent networks

150 shown

Every AS seen directly next to AS15935 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS29504Freenet Liberec, z.s.UnclassifiedIPv4 IPv6800,324
AS174Cogent Communications, LLCTransitIPv4 IPv6531,419
AS9002RETN LimitedUnclassifiedIPv4 IPv6153,457
AS6461Zayo BandwidthTransitIPv4 IPv666,903
AS6830Liberty Global Europe Holding B.V.ResidentialIPv4 IPv615,685
AS13335Cloudflare, Inc.HostingIPv4 IPv67,994
AS33891Core-Backbone GmbHHostingIPv47,682
AS15169Google LLCHostingIPv44,690
AS16509Amazon.com, Inc.HostingIPv4 IPv63,242
AS5405Inter.link GmbHUnclassifiedIPv4 IPv63,000
AS44901Belcloud LTDHostingIPv4 IPv61,148
AS6204INTERKVM HOST SRLUnclassifiedIPv4766
AS6774Belgacom International Carrier Services SAUnclassifiedIPv4 IPv6687
AS8400TELEKOM SRBIJA a.d.ResidentialIPv4 IPv6561
AS6939Hurricane Electric LLCTransitIPv4 IPv6547
AS197451Brno University of TechnologyEducationIPv4 IPv6537
AS8560IONOS SEHostingIPv4 IPv6520
AS5606GTS Telecom SRLUnclassifiedIPv4 IPv6433
AS47147Anexia Cloud Solutions GmbHUnclassifiedIPv4 IPv6380
AS2686AT&T Enterprises, LLCUnclassifiedIPv4334
AS204860NetX Networks a.s.UnclassifiedIPv4 IPv6302
AS15576NTS workspace AGUnclassifiedIPv4 IPv6279
AS16019Vodafone Czech Republic a.s.UnclassifiedIPv4 IPv6260
AS5603Telekom Slovenije, d.d.MobileIPv4 IPv6242
AS6855Slovak Telekom, a.s.MobileIPv4 IPv6220
AS3223Voxility LLPHostingIPv4219
AS196844Institute of Bioorganic Chemistry Polish Academy of Science, Poznan Supercomputing and Networking CenterUnclassifiedIPv4 IPv6194
AS13004Serbian Open Exchange DOOUnclassifiedIPv4 IPv6185
AS33353Sony Interactive Entertainment LLCHostingIPv4 IPv6165
AS198143Ceska Posta s.p.UnclassifiedIPv4 IPv6154
AS201727Blond & Brown s.r.o.UnclassifiedIPv4 IPv6154
AS2614Agentia de Administrare a Retelei Nationale de Informatica pentru Educatie si CercetareEducationIPv4145
AS29208Quantcom, a.s.UnclassifiedIPv4 IPv6142
AS2607Zdruzenie pouzivatelov Slovenskej akademickej datovej siete SANETEducationIPv4 IPv6123
AS198284Mesto Velka BystriceUnclassifiedIPv4 IPv6119
AS1299Arelion Sweden ABTransitIPv4 IPv6100
AS31230Slovak University of Technology in BratislavaUnclassifiedIPv4 IPv697
AS51744Non-profit organization Jablonka.czUnclassifiedIPv4 IPv695
AS56360TRINITY CZECH REPUBLIC, s.r.o.UnclassifiedIPv4 IPv695
AS9146BH Telecom d.d. SarajevoResidentialIPv485
AS200844STUDENT AGENCY k.s.UnclassifiedIPv4 IPv679
AS2906Netflix Streaming Services Inc.HostingIPv4 IPv677
AS20940Akamai International B.V.HostingIPv4 IPv665
AS203550i2net cz s.r.o.UnclassifiedIPv4 IPv661
AS51968NEOS v.o.s.UnclassifiedIPv460
AS215806Albert Ceska republika, s.r.o.UnclassifiedIPv460
AS56747Nelson Services, s.r.o.UnclassifiedIPv460
AS8218Zayo Infrastructure France SAUnclassifiedIPv4 IPv656
AS21385Trusted Network GmbHUnclassifiedIPv447
AS24482SG.GSHostingIPv4 IPv647
AS57463NetIX Communications JSCUnclassifiedIPv442
AS50163Altnet s.r.o.UnclassifiedIPv442
AS52058za200.cz s.r.o.UnclassifiedIPv439
AS61423JMP Technology Services GmbHUnclassifiedIPv4 IPv629
AS215120Evolus IT Solutions GmbHUnclassifiedIPv4 IPv625
AS2635Automattic, IncHostingIPv4 IPv622
AS208663Martin Ph. D. PustkaUnclassifiedIPv4 IPv621
AS42WoodyNet, Inc.UnclassifiedIPv419
AS43848Gamsjaeger Kabel-TV & ISP Betriebs GmbHResidentialIPv419
AS1764Next Layer Telekommunikationsdienstleistungs- und Beratungs GmbHUnclassifiedIPv4 IPv619
AS215628Xenox IT & Kommunikations GmbHHostingIPv4 IPv617
AS207203TIMEWARP IT Consulting GmbHUnclassifiedIPv415
AS35328DSI DATA, a. s.ResidentialIPv414
AS34347HALLAG Kommunal GmbHResidentialIPv412
AS48326DataNetworks s.r.o.ResidentialIPv411
AS5385Russmedia IT GmbHUnclassifiedIPv410
AS34288Kantonsschule ZugUnclassifiedIPv410
AS15958CETIN Ltd. BelgradeUnclassifiedIPv410
AS2576155 IT Services GmbHUnclassifiedIPv4 IPv610
AS201603AIRNET s.r.o.UnclassifiedIPv49
AS28889LinzNet Internet Service Provider GmbHUnclassifiedIPv48
AS25255Hutchison Drei Austria GmbHResidentialIPv48
AS199711National Cyber and Information Security AgencyUnclassifiedIPv47
AS12577MMC GmbHUnclassifiedIPv47
AS15498RTCnow Streaming Services GmbHUnclassifiedIPv47
AS15702euNetworks GmbHUnclassifiedIPv46
AS31510Innsbrucker Kommunalbetriebe AGResidentialIPv46
AS8387Deutsche Telekom Global Business Solutions GmbHUnclassifiedIPv46
AS211510Roman Franz Dissauer trading as RDI Solutions e.U.UnclassifiedIPv46
AS29081WVNET Information und Kommunikation GmbHResidentialIPv46
AS6663Euroweb Romania S.R.L.UnclassifiedIPv46
AS20804Exatel S.A.UnclassifiedIPv45
AS204457Atlantis Telekomunikasyon Bilisim Hizmetleri San. ve Tic. Ltd. Sti.ResidentialIPv45
AS51265Mass Response Service GmbHResidentialIPv45
AS44765MakeNewMedia Communications GmbHUnclassifiedIPv45
AS61211SETCOR d.o.o.UnclassifiedIPv45
AS44306OMONIA d.o.o.UnclassifiedIPv45
AS8674Netnod ABUnclassifiedIPv44
AS25467Akton d.o.o.UnclassifiedIPv44
AS47200NIX.CZ z.s.p.o.UnclassifiedIPv44
AS8793Thinxx GmbHUnclassifiedIPv44
AS38949Trestel SK, a.s.UnclassifiedIPv63

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 AS15935, 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 1 exchange across 1 country and 1 region.

ExchangeLocationTheir addressMember ports
Slovak Internet eXchange BratislavaBratislava, Slovakia192.108.148.18071

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 2026-08-08 by Packet Clearing House (https://www.pch.net/ixp/data), covering 1,327 exchanges and 93,137 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.