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AS199452MS3 Networks Ltd

United KingdomRegistryRIPE NCC

As of 25th October 2026, AS199452 (MS3 Networks Ltd), a network registered in the United Kingdom with RIPE NCC, originates 3 IPv4 prefixes covering 1.5k addresses. By IPv4 address space that makes it the 31,121st-largest of the 79,675 networks we see originating IPv4, and the 880th-largest of 2,079 in the United Kingdom. It is seen behind 28 upstream networks, most often AS174 (Cogent Communications, LLC) and AS2914 (NTT America, Inc.). 33% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. 67% of its routes reach at least 90% of full-feed peers, and 1 prefix is also originated by another network.

At a glance

IPv4 prefixes

3

IPv6 prefixes

0

IPv4 addresses

1.5k

IPv6 /64s

0

Upstream graph

The networks AS199452 is seen behind, one and two hops out, drawn from real AS paths.

AS199452Toward the internet core
Upstream graph for AS199452: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS199452MS3 Networks LtdThis networkAS174Cogent Communicat…AS2914NTT America, Inc.AS6939Hurricane Electri…AS18106Viewqwest Pte LtdAS25091IP-Max SAAS1299Arelion (fka. Tel…AS151326DCConnect Communi…AS49544i3D.net B.VAS20130Depaul UniversityAS132337AxclusiveAS215859Hetzner Cloud - S…AS8298IPng Networks GmbH

Networks observed one and two hops upstream of AS199452 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

130

adjacent networks

Upstreams
2822%
Peers
10278%
Downstreams
00%

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

Upstreams of AS199452
NetworkCountryRelationshipPathsVantage pts
AS174Cogent Communications, LLCUSPeer7839
AS2914NTT America, Inc.USPeer4939
AS6939Hurricane Electric LLCUSPeer124
AS25091IP-Max SACHPeer62
AS18106Viewqwest Pte LtdSGPeer62
AS24482SG.GSSGPeer52
AS3170VeloxServ Communications LtdGBPeer31
AS3741Dimension DataZAPeer31
AS16552Tiggee LLCUSPeer31
AS32590Valve CorporationUSPeer31

Prefixes

The largest blocks AS199452 originates, widest first.

Largest prefixes originated by AS199452
PrefixAddressesVisibility
185.2.192.0/221k75/76
154.61.48.0/2425675/76
154.62.128.0/2425667/76

Routing health

How AS199452'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

  • Valid33.3%1
  • Invalid0.0%0
  • No ROA66.7%2

Propagation

  • Globally propagated90% of full-feed peers or more66.7%2
  • Partially propagated40% to 90%33.3%1
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 3 prefixes

Recent changes

Announcements that started or stopped since 25th Sept 2026.

No announcement by AS199452 started or stopped in this period.

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