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AS5538Institute of Mathematics and Computer Science of University of Latvia

LatviaRegistryRIPE NCCTypeEyeball

As of 10th November 2026, AS5538 (Institute of Mathematics and Computer…), an access network registered in Latvia with RIPE NCC, originates 5 IPv4 prefixes covering 27.9k addresses and 2 IPv6 prefixes. By IPv4 address space that makes it the 5,987th-largest of the 80,733 networks we see originating IPv4, and the 14th-largest of 249 in Latvia. It is seen behind 6 upstream networks, most often AS174 (Cogent Communications, LLC) and AS6939 (Hurricane Electric LLC), and in front of 10 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

5

IPv6 prefixes

2

IPv4 addresses

27.9k

IPv6 /64s

34.9B

Upstream graph

The networks AS5538 is seen behind, one and two hops out, drawn from real AS paths.

AS5538Toward the internet core
Upstream graph for AS5538: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS5538Institute of Math…This networkAS174Cogent Communicat…AS6939Hurricane Electri…AS8194Latvia State Radi…AS21320GEANT VerenigingAS34073Ministry of Educa…AS1299Arelion (fka. Tel…AS151326DCConnect Communi…AS20130Depaul UniversityAS132337AxclusiveAS55002F5, Inc.AS2603NORDUnetAS3356Lumen (Level 3)

Networks observed one and two hops upstream of AS5538 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

36

adjacent networks

Upstreams
617%
Peers
2056%
Downstreams
1028%

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

Upstreams of AS5538
NetworkCountryRelationshipPathsVantage pts
AS174Cogent Communications, LLCUSPeer42475
AS6939Hurricane Electric LLCUSPeer37266
AS21320GEANT VerenigingNLPeer22384
AS8194Latvia State Radio and Television CentreLVPeer16460
AS34073Ministry of Education and Science Republic of LatviaLVPeer10648
AS20965GEANT VerenigingNLPeer552

Prefixes

The largest blocks AS5538 originates, widest first.

Largest prefixes originated by AS5538
PrefixAddressesVisibility
85.254.192.0/1816.4k76/76
92.240.64.0/198.2k75/76
5.152.224.0/212k75/76
185.23.160.0/221k76/76
194.8.1.0/2425676/76
2a02:500::/2934.4B × /6461/63
2a02:500:4000::/35537M × /6462/63

Routing health

How AS5538'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 — 5 prefixes

IPv6 — 2 prefixes

  • /2934.4B × /6450.0%1
  • /35537M × /6450.0%1

Recent changes

Announcements that started or stopped since 11th Oct 2026.

No announcement by AS5538 started or stopped in this period.

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