asn.dev

Observed topology

AS1853 ACONET ACOnet Backbone

Upstreams 13 carry this network
Downstreams 50 this network carries
Adjacent (IPv4) 60
Adjacent (IPv6) 34

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS1853: 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
AS6939Hurricane Electric LLCTransitIPv4 IPv6658
AS1764Next Layer Telekommunikationsdienstleistungs- und Beratungs GmbHUnclassifiedIPv4 IPv6206
AS20965GEANT VerenigingUnclassifiedIPv4 IPv689
AS21320GEANT VerenigingUnclassifiedIPv4 IPv679
AS9002RETN LimitedUnclassifiedIPv4 IPv664
AS2852CESNET z.s.p.o.EducationIPv4 IPv635
AS33891Core-Backbone GmbHHostingIPv4 IPv619
AS3303Swisscom (Schweiz) AGResidentialIPv4 IPv619
AS48362Stadtwerke FeldkirchResidentialIPv4 IPv619
AS2607Zdruzenie pouzivatelov Slovenskej akademickej datovej siete SANETEducationIPv48
AS15935ha-vel internet s.r.o.UnclassifiedIPv4 IPv62
AS57463NetIX Communications JSCUnclassifiedIPv41
AS13030Init7 (Switzerland) Ltd.HostingIPv61

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 AS1853 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS760Vienna UniversityUnclassifiedIPv4490
AS1205University LinzUnclassifiedIPv4 IPv6318
AS47515Bundesministerium fuer Inneres, Sektion IVUnclassifiedIPv4 IPv6236
AS51066Austro Control Oesterreichische Gesellschaft fuer Zivilluftfahrt mit beschraenkter HaftungUnclassifiedIPv4 IPv6206
AS39837Verein zur Foerderung von NetzwerkkunstUnclassifiedIPv4 IPv6179
AS210543Steiermaerkische Krankenanstaltengesellschaft mbHUnclassifiedIPv4 IPv6178
AS42685BundeskanzleramtUnclassifiedIPv4175
AS39057DVT-Daten-Verarbeitung-Tirol GmbHUnclassifiedIPv4 IPv6172
AS208740Bundesministerium fuer europaeische und internationale AngelegenheitenUnclassifiedIPv4 IPv6150
AS12991Amt der Ooe. LandesregierungUnclassifiedIPv4 IPv6149
AS8692Bundesrechenzentrum GmbHUnclassifiedIPv4 IPv6143
AS679Technische Universitat WienUnclassifiedIPv4141
AS12762Vorarlberger Informatik- und Telekommunikationsdienstleistungsgesellschaft mbHUnclassifiedIPv4 IPv6134
AS1288Packet Clearing House, Inc.UnclassifiedIPv4 IPv6130
AS34883FH JOANNEUM Gesellschaft mbHUnclassifiedIPv4 IPv6108
AS2494IDDQD-ASUnclassifiedIPv4 IPv6108
AS206021Wirtschaftskammer SteiermarkUnclassifiedIPv4 IPv6105
AS2852CESNET z.s.p.o.EducationIPv4104
AS2488International Institute for Applied Systems AnalysisUnclassifiedIPv4 IPv695
AS30971nic.at GmbHUnclassifiedIPv485
AS51350Fachhochschule Technikum WienUnclassifiedIPv4 IPv678
AS6720Magistrat der Stadt Wien, Magistratsabteilung 01UnclassifiedIPv4 IPv674
AS1112IDDQD-ASUnclassifiedIPv470
AS1113Technische Universitaet GrazUnclassifiedIPv470
AS1776Vienna University of Economics and BusinessUnclassifiedIPv470
AS1110IDDQD-ASUnclassifiedIPv470
AS1109Universitaet SalzburgUnclassifiedIPv470
AS1117Universitaet fur Bodenkultur, WienUnclassifiedIPv470
AS1114IDDQD-ASUnclassifiedIPv470
AS1111Universitaet KlagenfurtUnclassifiedIPv470
AS2036Joanneum Research Forschungsgesellschaft mbHUnclassifiedIPv470
AS41915Land-, forst- und wasserwirtschaftliches Rechenzentrum GmbHUnclassifiedIPv470
AS213181CEU GmbHUnclassifiedIPv470
AS207653Rechnungshof OesterreichUnclassifiedIPv470
AS1115IDDQD-ASUnclassifiedIPv470
AS206571Land BurgenlandUnclassifiedIPv467
AS208441Amt der Salzburger LandesregierungUnclassifiedIPv4 IPv660
AS6883ParlamentsdirektionUnclassifiedIPv440
AS213080Oberoesterreichische Gesundheitsholding GmbHUnclassifiedIPv638
AS215422Stadt DornbirnUnclassifiedIPv437
AS2604Graz University of Music and Performing ArtsEducationIPv637
AS211817Wirtschafts- und Sozialwissenschaftliches RechenzentrumUnclassifiedIPv433
AS2607Zdruzenie pouzivatelov Slovenskej akademickej datovej siete SANETEducationIPv433
AS13042Oesterreichische NationalbankUnclassifiedIPv429
AS20537der NOe LandesregierungUnclassifiedIPv428
AS35052ACONETUnclassifiedIPv416
AS34183Bundesministerium f. GesundheitUnclassifiedIPv4 IPv615
AS200070CZ.NIC, z.s.p.o.UnclassifiedIPv4 IPv614
AS207131Stadtgemeinde LeobenUnclassifiedIPv410
AS8501Institute of Bioorganic Chemistry Polish Academy of Science, Poznan Supercomputing and Networking CenterEducationIPv46

Adjacency

Adjacent networks

96 shown

Every AS seen directly next to AS1853 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS6939Hurricane Electric LLCTransitIPv4 IPv63,447
AS1764Next Layer Telekommunikationsdienstleistungs- und Beratungs GmbHUnclassifiedIPv4 IPv61,026
AS20965GEANT VerenigingUnclassifiedIPv4 IPv6538
AS760Vienna UniversityUnclassifiedIPv4 IPv6530
AS21320GEANT VerenigingUnclassifiedIPv4 IPv6519
AS9002RETN LimitedUnclassifiedIPv4 IPv6472
AS2852CESNET z.s.p.o.EducationIPv4 IPv6407
AS1205University LinzUnclassifiedIPv4 IPv6318
AS47515Bundesministerium fuer Inneres, Sektion IVUnclassifiedIPv4 IPv6236
AS51066Austro Control Oesterreichische Gesellschaft fuer Zivilluftfahrt mit beschraenkter HaftungUnclassifiedIPv4 IPv6206
AS39837Verein zur Foerderung von NetzwerkkunstUnclassifiedIPv4 IPv6179
AS210543Steiermaerkische Krankenanstaltengesellschaft mbHUnclassifiedIPv4 IPv6178
AS42685BundeskanzleramtUnclassifiedIPv4175
AS39057DVT-Daten-Verarbeitung-Tirol GmbHUnclassifiedIPv4 IPv6172
AS208740Bundesministerium fuer europaeische und internationale AngelegenheitenUnclassifiedIPv4 IPv6150
AS12991Amt der Ooe. LandesregierungUnclassifiedIPv4 IPv6149
AS8692Bundesrechenzentrum GmbHUnclassifiedIPv4 IPv6146
AS679Technische Universitat WienUnclassifiedIPv4141
AS1113Technische Universitaet GrazUnclassifiedIPv4140
AS12762Vorarlberger Informatik- und Telekommunikationsdienstleistungsgesellschaft mbHUnclassifiedIPv4 IPv6134
AS1288Packet Clearing House, Inc.UnclassifiedIPv4 IPv6130
AS34883FH JOANNEUM Gesellschaft mbHUnclassifiedIPv4 IPv6108
AS2494IDDQD-ASUnclassifiedIPv4 IPv6108
AS206021Wirtschaftskammer SteiermarkUnclassifiedIPv4 IPv6105
AS2488International Institute for Applied Systems AnalysisUnclassifiedIPv4 IPv695
AS30971nic.at GmbHUnclassifiedIPv485
AS48362Stadtwerke FeldkirchResidentialIPv4 IPv678
AS51350Fachhochschule Technikum WienUnclassifiedIPv4 IPv678
AS6720Magistrat der Stadt Wien, Magistratsabteilung 01UnclassifiedIPv4 IPv674
AS41915Land-, forst- und wasserwirtschaftliches Rechenzentrum GmbHUnclassifiedIPv470
AS1776Vienna University of Economics and BusinessUnclassifiedIPv470
AS1110IDDQD-ASUnclassifiedIPv470
AS1109Universitaet SalzburgUnclassifiedIPv470
AS1117Universitaet fur Bodenkultur, WienUnclassifiedIPv470
AS1114IDDQD-ASUnclassifiedIPv470
AS1111Universitaet KlagenfurtUnclassifiedIPv470
AS2036Joanneum Research Forschungsgesellschaft mbHUnclassifiedIPv470
AS213181CEU GmbHUnclassifiedIPv470
AS207653Rechnungshof OesterreichUnclassifiedIPv470
AS1112IDDQD-ASUnclassifiedIPv470
AS1115IDDQD-ASUnclassifiedIPv470
AS3303Swisscom (Schweiz) AGResidentialIPv4 IPv669
AS206571Land BurgenlandUnclassifiedIPv467
AS208441Amt der Salzburger LandesregierungUnclassifiedIPv4 IPv660
AS33891Core-Backbone GmbHHostingIPv4 IPv658
AS57463NetIX Communications JSCUnclassifiedIPv452
AS8501Institute of Bioorganic Chemistry Polish Academy of Science, Poznan Supercomputing and Networking CenterEducationIPv451
AS2607Zdruzenie pouzivatelov Slovenskej akademickej datovej siete SANETEducationIPv451
AS6883ParlamentsdirektionUnclassifiedIPv440
AS213080Oberoesterreichische Gesundheitsholding GmbHUnclassifiedIPv638
AS2604Graz University of Music and Performing ArtsEducationIPv637
AS215422Stadt DornbirnUnclassifiedIPv437
AS211817Wirtschafts- und Sozialwissenschaftliches RechenzentrumUnclassifiedIPv433
AS13042Oesterreichische NationalbankUnclassifiedIPv429
AS20537der NOe LandesregierungUnclassifiedIPv428
AS35052ACONETUnclassifiedIPv416
AS34183Bundesministerium f. GesundheitUnclassifiedIPv4 IPv615
AS200070CZ.NIC, z.s.p.o.UnclassifiedIPv4 IPv614
AS207131Stadtgemeinde LeobenUnclassifiedIPv410
AS1120ACONETUnclassifiedIPv47
AS35492Verein zur Foerderung freier NetzeUnclassifiedIPv45
AS15935ha-vel internet s.r.o.UnclassifiedIPv4 IPv62
AS13030Init7 (Switzerland) Ltd.HostingIPv61

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 AS1853, 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
Vienna Internet ExchangeVienna, Austria193.203.0.1188

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 2026-08-09 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 74.03M 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.