asn.dev

Observed topology

AS40994 ALWYZON Alwyzon, a trading name of Hohl IT e.U.

Upstreams 14 carry this network
Downstreams 12 this network carries
Adjacent (IPv4) 20
Adjacent (IPv6) 24

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS40994: 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
AS2914NTT America, Inc.TransitIPv4 IPv6413
AS174Cogent Communications, LLCTransitIPv4 IPv6345
AS6939Hurricane Electric LLCTransitIPv4 IPv6223
AS3257GTT Communications Inc.TransitIPv4 IPv6188
AS1299Arelion Sweden ABTransitIPv4110
AS6762TELECOM ITALIA SPARKLE S.p.A.TransitIPv4 IPv625
AS8218Zayo Infrastructure France SAUnclassifiedIPv4 IPv624
AS48362Stadtwerke FeldkirchResidentialIPv4 IPv624
AS24482SG.GSHostingIPv4 IPv624
AS29504Freenet Liberec, z.s.UnclassifiedIPv4 IPv624
AS202297Skylon Solutions LimitedUnclassifiedIPv423
AS57463NetIX Communications JSCUnclassifiedIPv423
AS9002RETN LimitedUnclassifiedIPv63
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 AS40994 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS203997XTDef LimitedUnclassifiedIPv4 IPv6220
AS198510XTDEF-LimitedUnclassifiedIPv4 IPv6219
AS212085Alexander BruegmannUnclassifiedIPv4 IPv6109
AS204136Kevin HollyUnclassifiedIPv4 IPv694
AS205563Marc GomezUnclassifiedIPv669
AS216321Zero Attack Vector LLCUnclassifiedIPv634
AS215472Jan FermeUnclassifiedIPv634
AS219240Yuki HaignerUnclassifiedIPv634
AS203391Cloud DNS LtdHostingIPv4 IPv616
AS29997Vitalwerks Internet Solutions, LLCUnclassifiedIPv4 IPv612
AS200325BUNNYWAY, informacijske storitve d.o.o.HostingIPv4 IPv64
AS210250K Media Tech Ltd.UnclassifiedIPv42

Adjacency

Adjacent networks

44 shown

Every AS seen directly next to AS40994 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS2914NTT America, Inc.TransitIPv4 IPv6486
AS6939Hurricane Electric LLCTransitIPv4 IPv6452
AS174Cogent Communications, LLCTransitIPv4 IPv6407
AS1299Arelion Sweden ABTransitIPv4 IPv6333
AS3257GTT Communications Inc.TransitIPv4 IPv6260
AS203997XTDef LimitedUnclassifiedIPv4 IPv6220
AS198510XTDEF-LimitedUnclassifiedIPv4 IPv6219
AS212085Alexander BruegmannUnclassifiedIPv4 IPv6109
AS204136Kevin HollyUnclassifiedIPv4 IPv694
AS205563Marc GomezUnclassifiedIPv669
AS29504Freenet Liberec, z.s.UnclassifiedIPv4 IPv667
AS6762TELECOM ITALIA SPARKLE S.p.A.TransitIPv4 IPv651
AS24482SG.GSHostingIPv4 IPv643
AS202297Skylon Solutions LimitedUnclassifiedIPv442
AS48362Stadtwerke FeldkirchResidentialIPv4 IPv641
AS8218Zayo Infrastructure France SAUnclassifiedIPv4 IPv637
AS9002RETN LimitedUnclassifiedIPv636
AS219240Yuki HaignerUnclassifiedIPv634
AS215472Jan FermeUnclassifiedIPv634
AS216321Zero Attack Vector LLCUnclassifiedIPv634
AS57463NetIX Communications JSCUnclassifiedIPv429
AS203391Cloud DNS LtdHostingIPv4 IPv616
AS29997Vitalwerks Internet Solutions, LLCUnclassifiedIPv4 IPv612
AS13030Init7 (Switzerland) Ltd.HostingIPv611
AS200325BUNNYWAY, informacijske storitve d.o.o.HostingIPv4 IPv64
AS210250K Media Tech Ltd.UnclassifiedIPv42
AS1764Next Layer Telekommunikationsdienstleistungs- und Beratungs GmbHUnclassifiedIPv62

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 AS40994, 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 3 exchanges across 2 countries and 1 region.

ExchangeLocationTheir addressMember ports
Vienna Internet ExchangeVienna, Austria193.203.0.75188
Budapest Internet ExchangeBudapest, Hungary193.188.137.40119
ERA-IX ViennaVienna, Austria91.213.211.14015

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.