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AS25251Alpha Online Ltd

RussiaRegistryRIPE NCC

As of 27th September 2026, AS25251 (Alpha Online Ltd), a network registered in Russia with RIPE NCC, originates 8 IPv4 prefixes covering 2.6k addresses. By IPv4 address space that makes it the 23,021st-largest of the 79,525 networks we see originating IPv4, and the 1,350th-largest of 4,942 in Russia. It is seen behind 6 upstream networks, most often AS50509 (Transroute.Net) and AS35598 (INETCOM CARRIER LLC). 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

8

IPv6 prefixes

0

IPv4 addresses

2.6k

IPv6 /64s

0

Upstream graph

The networks AS25251 is seen behind, one and two hops out, drawn from real AS paths.

AS25251Toward the internet core
Upstream graph for AS25251: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS25251Alpha Online LtdThis networkAS25091IP-Max SAAS35598INETCOM CARRIER L…AS49544i3D.net B.VAS50509Transroute.NetAS62255BiMajLink d.o.o.AS8298IPng Networks GmbHAS56662Marcin GondekAS2914NTT America, Inc.AS3356Lumen (Level 3)AS6939Hurricane Electri…AS1299Arelion (fka. Tel…AS174Cogent Communicat…

Networks observed one and two hops upstream of AS25251 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

20

adjacent networks

Upstreams
630%
Peers
1470%
Downstreams
00%

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

Upstreams of AS25251
NetworkCountryRelationshipPathsVantage pts
AS50509Transroute.NetRUPeer40050
AS35598INETCOM CARRIER LLCRUPeer14418
AS62255BiMajLink d.o.o.SIPeer8010
AS137409GSL Networks Pty LTDAUPeer81
AS49544i3D.net B.VNLPeer81
AS25091IP-Max SACHPeer81

Prefixes

The largest blocks AS25251 originates, widest first.

Largest prefixes originated by AS25251
PrefixAddressesVisibility
81.94.32.0/2351281/81
81.94.46.0/2351281/81
81.94.35.0/2425681/81
81.94.37.0/2425681/81
81.94.39.0/2425681/81
81.94.42.0/2425681/81
81.94.44.0/2425681/81
81.94.45.0/2425681/81

Routing health

How AS25251'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%8
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more100.0%8
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 8 prefixes

Recent changes

Announcements that started or stopped since 28th Aug 2026.

No announcement by AS25251 started or stopped in this period.

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