subnet.im

AS25248RADIOKOMUNIKACE a.s.

CzechiaRegistryRIPE NCCTypeEyeball

As of 22nd October 2026, AS25248 (RADIOKOMUNIKACE a.s.), an access network registered in Czechia with RIPE NCC, originates 5 IPv4 prefixes covering 107k addresses and 2 IPv6 prefixes. By IPv4 address space that makes it the 2,300th-largest of the 79,663 networks we see originating IPv4, and the 14th-largest of 572 in Czechia. It is seen behind 12 upstream networks, most often AS1299 (Arelion (fka. Telia Carrier)) and AS6939 (Hurricane Electric LLC), and in front of 25 downstream networks. 71% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. 100% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

5

IPv6 prefixes

2

IPv4 addresses

107k

IPv6 /64s

4.3B

Upstream graph

The networks AS25248 is seen behind, one and two hops out, drawn from real AS paths.

AS25248Toward the internet core
Upstream graph for AS25248: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS25248RADIOKOMUNIKACE a…This networkAS174Cogent Communicat…AS1299Arelion (fka. Tel…AS6939Hurricane Electri…AS24940Hetzner Online Gm…AS32590Valve CorporationAS151326DCConnect Communi…AS13030Init7 (Switzerlan…AS16552Tiggee LLCAS20130Depaul UniversityAS132337AxclusiveAS2914NTT America, Inc.AS3356Lumen (Level 3)

Networks observed one and two hops upstream of AS25248 in real AS paths. A thicker line means more vantage points saw that adjacency, so weight tracks how well attested it is — not how much traffic it carries. Adjacency is an observation; whether it is a transit purchase or a settlement-free peering is an inference, and is labelled as one wherever we show it.

Neighbouring networks

108

adjacent networks

Upstreams
1211%
Peers
7166%
Downstreams
2523%

Networks carrying this one's traffic toward the rest of the internet.

Upstreams of AS25248
NetworkCountryRelationshipPathsVantage pts
AS1299Arelion (fka. Telia Carrier)SEPeer1,98668
AS6939Hurricane Electric LLCUSPeer1,50156
AS174Cogent Communications, LLCUSPeer64225
AS32590Valve CorporationUSPeer542
AS24940Hetzner Online GmbHDEPeer502
AS49544i3D.net B.VNLPeer502
AS31230SIX.SK Route ServersSKPeer361
AS132337AxclusiveSGPeer331
AS24482SG.GSSGPeer291
AS22356Durand do Brasil LtdaBRPeer291

Prefixes

The largest blocks AS25248 originates, widest first.

Largest prefixes originated by AS25248
PrefixAddressesVisibility
85.207.0.0/1665.5k76/77
82.99.128.0/1816.4k76/77
84.244.64.0/1816.4k76/77
212.158.128.0/198.2k76/77
193.32.56.0/2425676/77
2a02:a40::/324.3B × /6464/64
2001:67c:2100::/4865.5k × /6464/64

Routing health

How AS25248's own announcements validate against RPKI and how far they propagate. The same measures for the whole routing table are on the routing table in numbers.

RPKI origin validation

  • Valid71.4%5
  • Invalid0.0%0
  • No ROA28.6%2

Propagation

  • Globally propagated90% of full-feed peers or more100.0%7
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 5 prefixes

IPv6 — 2 prefixes

  • /324.3B × /6450.0%1
  • /4865.5k × /6450.0%1

Recent changes

Announcements that started or stopped since 23rd Sept 2026.

No announcement by AS25248 started or stopped in this period.

Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.