asn.dev

Observed topology

AS197451 VUTBR-AS

Education RIPE

Upstreams 3 carry this network
Downstreams 8 this network carries
Adjacent (IPv4) 11
Adjacent (IPv6) 8
Upstream graph Who carries AS197451, and who carries them, drawn as a map up to the transit-free core. 0 exchanges Where AS197451 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS197451: 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
AS2852CESNET z.s.p.o.EducationIPv4 IPv6261
AS15935ha-vel internet s.r.o.UnclassifiedIPv4 IPv6213
AS16019Vodafone Czech Republic a.s.UnclassifiedIPv4155

Transit

Downstream networks

inferred

Networks for which AS197451 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS204860NetX Networks a.s.UnclassifiedIPv4 IPv6435
AS202872KME, spol. s r. o.UnclassifiedIPv4 IPv6123
AS210604Pernix systems s.r.o.UnclassifiedIPv4120
AS201263Brno University of TechnologyUnclassifiedIPv4 IPv691
AS207167mapnet IT services s.r.o.UnclassifiedIPv4 IPv661
AS201931LBnet.cz s.r.o.UnclassifiedIPv4 IPv637
AS34222ZONER a.s.HostingIPv432
AS212138Technicke site Brno, akciova spolecnostUnclassifiedIPv414

Adjacency

Adjacent networks

All 11

Every AS seen directly next to AS197451 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS15935ha-vel internet s.r.o.UnclassifiedIPv4 IPv6850
AS16019Vodafone Czech Republic a.s.UnclassifiedIPv4 IPv6583
AS204860NetX Networks a.s.UnclassifiedIPv4 IPv6438
AS2852CESNET z.s.p.o.EducationIPv4 IPv6261
AS210604Pernix systems s.r.o.UnclassifiedIPv4239
AS202872KME, spol. s r. o.UnclassifiedIPv4 IPv6123
AS201263Brno University of TechnologyUnclassifiedIPv4 IPv691
AS207167mapnet IT services s.r.o.UnclassifiedIPv4 IPv691
AS201931LBnet.cz s.r.o.UnclassifiedIPv4 IPv637
AS34222ZONER a.s.HostingIPv432

All 11 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-26 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 73.14M route entries. These are observations from those vantage points, not a complete or authoritative view of the internet.

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. 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.

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