subnet.im

AS51955Institute of Mathematics and Computer Science of University of Latvia

LatviaRegistryRIPE NCC

As of 10th November 2026, AS51955 (Institute of Mathematics and Computer…), a network registered in Latvia with RIPE NCC, originates 7 IPv4 prefixes covering 1.8k addresses and 7 IPv6 prefixes. By IPv4 address space that makes it the 30,392nd-largest of the 80,733 networks we see originating IPv4, and the 53rd-largest of 249 in Latvia. It is seen behind 6 upstream networks, most often AS29067 (Hostmaster LLC) and AS8194 (Latvia State Radio and Television Centre). 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

7

IPv6 prefixes

7

IPv4 addresses

1.8k

IPv6 /64s

459k

Upstream graph

The networks AS51955 is seen behind, one and two hops out, drawn from real AS paths.

AS51955Toward the internet core
Upstream graph for AS51955: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS51955Institute of Math…This networkAS5538Institute of Math…AS8194Latvia State Radi…AS20910Bite Latvia (Balt…AS22548Núcleo de Informa…AS29067Hostmaster LLCAS174Cogent Communicat…AS55002F5, Inc.AS13194UAB "Bite Lietuva"AS6939Hurricane Electri…AS2914NTT America, Inc.AS3326Datagroup PJSCAS13335Cloudflare, Inc.

Networks observed one and two hops upstream of AS51955 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

12

adjacent networks

Upstreams
650%
Peers
650%
Downstreams
00%

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

Upstreams of AS51955
NetworkCountryRelationshipPathsVantage pts
AS29067Hostmaster LLCUAPeer21852
AS8194Latvia State Radio and Television CentreLVPeer210138
AS5538Institute of Mathematics and Computer Science of University of LatviaLVPeer20043
AS22548Núcleo de Informação e Coordenação do Ponto BR - NIC.BRBRPeer18241
AS20910Bite Latvia (Baltcom)LVPeer13838
AS5518SIA TetLVPeer2212

Prefixes

The largest blocks AS51955 originates, widest first.

Largest prefixes originated by AS51955
PrefixAddressesVisibility
91.198.156.0/2425676/76
194.0.8.0/2425676/76
194.0.48.0/2425676/76
194.0.49.0/2425675/76
194.0.50.0/2425676/76
194.8.2.0/2425676/76
194.8.3.0/2425676/76
2001:678:b::/4865.5k × /6463/63
2001:678:7c::/4865.5k × /6463/63
2001:678:80::/4865.5k × /6463/63

Routing health

How AS51955'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%14
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more100.0%14
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 7 prefixes

IPv6 — 7 prefixes

  • /4865.5k × /64100.0%7

Recent changes

Announcements that started or stopped since 11th Oct 2026.

No announcement by AS51955 started or stopped in this period.

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