asn.dev

Observed topology

AS24641 FASTER-AS

Upstreams 7 carry this network
Downstreams 13 this network carries
Adjacent (IPv4) 19
Adjacent (IPv6) 12

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS24641: 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
AS28725CETIN a.s.ResidentialIPv4 IPv6358
AS16019Vodafone Czech Republic a.s.UnclassifiedIPv4 IPv6119
AS6939Hurricane Electric LLCTransitIPv4 IPv696
AS39392SH.cz s.r.o.HostingIPv4 IPv685
AS24482SG.GSHostingIPv4 IPv610
AS29504Freenet Liberec, z.s.UnclassifiedIPv4 IPv610
AS57463NetIX Communications JSCUnclassifiedIPv48

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 AS24641 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS216258EOX IT Services GmbHUnclassifiedIPv4 IPv6443
AS205234Brnenske komunikace a.s.UnclassifiedIPv4166
AS212138Technicke site Brno, akciova spolecnostUnclassifiedIPv4114
AS34049H-data, spol. s r.o.UnclassifiedIPv4 IPv6114
AS200844STUDENT AGENCY k.s.UnclassifiedIPv4 IPv679
AS199722Sberbank CZ, a.s. v likvidaciUnclassifiedIPv462
AS205947NDC ICT Solutions s.r.o.UnclassifiedIPv462
AS51876COMCRAFT s. r. o.UnclassifiedIPv462
AS51134Development 777 s.r.o.UnclassifiedIPv4 IPv658
AS216021Stefan Johannes MayerUnclassifiedIPv634
AS51521Resident Control Telco s.r.o.UnclassifiedIPv421
AS49580Monet +, a.s.UnclassifiedIPv416
AS35613FASTER CZ spol. s r.o.UnclassifiedIPv42

Adjacency

Adjacent networks

31 shown

Every AS seen directly next to AS24641 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS28725CETIN a.s.ResidentialIPv4 IPv61,086
AS216258EOX IT Services GmbHUnclassifiedIPv4 IPv6443
AS6939Hurricane Electric LLCTransitIPv4 IPv6370
AS39392SH.cz s.r.o.HostingIPv4 IPv6197
AS16019Vodafone Czech Republic a.s.UnclassifiedIPv4 IPv6187
AS205234Brnenske komunikace a.s.UnclassifiedIPv4166
AS34049H-data, spol. s r.o.UnclassifiedIPv4 IPv6135
AS212138Technicke site Brno, akciova spolecnostUnclassifiedIPv4114
AS200844STUDENT AGENCY k.s.UnclassifiedIPv4 IPv679
AS51876COMCRAFT s. r. o.UnclassifiedIPv462
AS199722Sberbank CZ, a.s. v likvidaciUnclassifiedIPv462
AS205947NDC ICT Solutions s.r.o.UnclassifiedIPv462
AS51134Development 777 s.r.o.UnclassifiedIPv4 IPv658
AS29504Freenet Liberec, z.s.UnclassifiedIPv4 IPv639
AS216021Stefan Johannes MayerUnclassifiedIPv634
AS24482SG.GSHostingIPv4 IPv631
AS57463NetIX Communications JSCUnclassifiedIPv425
AS51521Resident Control Telco s.r.o.UnclassifiedIPv421
AS49580Monet +, a.s.UnclassifiedIPv416
AS8218Zayo Infrastructure France SAUnclassifiedIPv65
AS35613FASTER CZ spol. s r.o.UnclassifiedIPv42

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 AS24641, 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 2 exchanges across 2 countries and 1 region.

ExchangeLocationTheir addressMember ports
Peering.czPrague, Czech Republic2001:7f8:7f::173212
ERA-IX ViennaVienna, Austria91.213.211.17315

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.