subnet.im

AS8251FreeTel, s.r.o.

CzechiaRegistryRIPE NCCTypeEyeball

As of 22nd October 2026, AS8251 (FreeTel, s.r.o.), an access network registered in Czechia with RIPE NCC, originates 6 IPv4 prefixes covering 17.4k addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 7,646th-largest of the 79,663 networks we see originating IPv4, and the 42nd-largest of 572 in Czechia. It is seen behind 10 upstream networks, most often AS1299 (Arelion (fka. Telia Carrier)) and AS29208 (Quantcom, a.s.), and in front of 16 downstream networks. Every one of its announcements has 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

6

IPv6 prefixes

1

IPv4 addresses

17.4k

IPv6 /64s

4.3B

Upstream graph

The networks AS8251 is seen behind, one and two hops out, drawn from real AS paths.

AS8251Toward the internet core
Upstream graph for AS8251: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS8251FreeTel, s.r.o.This networkAS1299Arelion (fka. Tel…AS6939Hurricane Electri…AS16019Vodafone Czech Re…AS24482SG.GSAS29208Quantcom, a.s.AS13030Init7 (Switzerlan…AS16552Tiggee LLCAS20130Depaul UniversityAS132337AxclusiveAS1273Vodafone Group PLCAS38623Metfone (Viettel …AS3257GTT Communication…

Networks observed one and two hops upstream of AS8251 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

74

adjacent networks

Upstreams
1014%
Peers
4865%
Downstreams
1622%

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

Upstreams of AS8251
NetworkCountryRelationshipPathsVantage pts
AS1299Arelion (fka. Telia Carrier)SEPeer2,38180
AS29208Quantcom, a.s.CZPeer1,33040
AS16019Vodafone Czech Republic a.s.CZPeer36311
AS6939Hurricane Electric LLCUSPeer26213
AS24482SG.GSSGPeer614
AS132337AxclusiveSGPeer572
AS49544i3D.net B.VNLPeer532
AS32590Valve CorporationUSPeer532
AS24940Hetzner Online GmbHDEPeer532
AS22356Durand do Brasil LtdaBRPeer71

Prefixes

The largest blocks AS8251 originates, widest first.

Largest prefixes originated by AS8251
PrefixAddressesVisibility
31.47.96.0/204.1k77/77
78.108.96.0/204.1k77/77
212.79.96.0/204.1k77/77
81.201.48.0/212k77/77
81.201.56.0/212k77/77
185.99.64.0/221k77/77
2a01:490::/324.3B × /6464/64

Routing health

How AS8251'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

  • Valid100.0%7
  • Invalid0.0%0
  • No ROA0.0%0

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 — 6 prefixes

IPv6 — 1 prefixes

  • /324.3B × /64100.0%1

Recent changes

Announcements that started or stopped since 23rd Sept 2026.

No announcement by AS8251 started or stopped in this period.

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