asn.dev

Observed topology

AS25192 CZNIC-AS CZ.NIC, z.s.p.o.

Unclassified RIPE NSP

Upstreams 40 carry this network
Downstreams 7 this network carries
Adjacent (IPv4) 39
Adjacent (IPv6) 30
Upstream graph Who carries AS25192, and who carries them, drawn as a map up to the transit-free core. 11 exchanges Where AS25192 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

All 40

Networks observed carrying traffic for AS25192: 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
AS37474ISPA SAUnclassifiedIPv4 IPv680
AS1299Arelion Sweden ABTransitIPv4 IPv673
AS25248RADIOKOMUNIKACE a.s.UnclassifiedIPv4 IPv671
AS6939Hurricane Electric LLCTransitIPv448
AS12570O2 Czech Republic, a.s.UnclassifiedIPv443
AS38001NewMedia Express Pte LtdHostingIPv4 IPv640
AS29802HIVELOCITY, Inc.HostingIPv4 IPv638
AS8674Netnod ABUnclassifiedIPv4 IPv630
AS34549meerfarbig GmbH & Co. KGHostingIPv4 IPv620
AS34867Cosmonova LLCUnclassifiedIPv4 IPv613

All 40 upstreams →

Transit

Downstream networks

inferred

Networks for which AS25192 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS20701CZ.NIC, z.s.p.o.UnclassifiedIPv4 IPv6190
AS26710ICANNUnclassifiedIPv4 IPv6144
AS52234NIC ChileUnclassifiedIPv4 IPv641
AS29067LLC "Hostmaster"HostingIPv635
AS52304NIC ChileUnclassifiedIPv4 IPv611
AS61455LACTLD - LATIN AMERICAN AND CARIBBEAN TLD ASSOCIATIONHostingIPv4 IPv62
AS25152Reseaux IP Europeens Network Coordination Centre (RIPE NCC)UnclassifiedIPv61

Adjacency

Adjacent networks

All 47

Every AS seen directly next to AS25192 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS1299Arelion Sweden ABTransitIPv4 IPv6268
AS25248RADIOKOMUNIKACE a.s.UnclassifiedIPv4 IPv6216
AS20701CZ.NIC, z.s.p.o.UnclassifiedIPv4 IPv6190
AS26710ICANNUnclassifiedIPv4 IPv6144
AS6939Hurricane Electric LLCTransitIPv4101
AS37474ISPA SAUnclassifiedIPv4 IPv680
AS12570O2 Czech Republic, a.s.UnclassifiedIPv443
AS52234NIC ChileUnclassifiedIPv4 IPv641
AS38001NewMedia Express Pte LtdHostingIPv4 IPv640
AS29802HIVELOCITY, Inc.HostingIPv4 IPv638

All 47 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-11-13 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 74.40M 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.