subnet.im

AS61231Neos Networks (SSE PLC)

United KingdomRegistryRIPE NCC

As of 27th September 2026, AS61231 (Neos Networks (SSE PLC)), a network registered in the United Kingdom with RIPE NCC, originates 8 IPv4 prefixes covering 36.9k addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 5,093rd-largest of the 79,525 networks we see originating IPv4, and the 128th-largest of 2,074 in the United Kingdom. It is seen behind 39 upstream networks, most often AS174 (Cogent Communications, LLC) and AS6762 (Telecom Italia Sparkle (Seabone)), and in front of 32 downstream networks. None of its announcements have a valid RPKI ROA. 100% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

8

IPv6 prefixes

1

IPv4 addresses

36.9k

IPv6 /64s

34.4B

Upstream graph

The networks AS61231 is seen behind, one and two hops out, drawn from real AS paths.

AS61231Toward the internet core
Upstream graph for AS61231: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS61231Neos Networks (SS…This networkAS174Cogent Communicat…AS6667Elisa OyjAS6762Telecom Italia Sp…AS6939Hurricane Electri…AS18106Viewqwest Pte LtdAS151326DCConnect Communi…AS1299Arelion (fka. Tel…AS3356Lumen (Level 3)AS2914NTT America, Inc.AS52075Wifirst S.A.S.AS20130Depaul UniversityAS215859Hetzner Cloud - S…

Networks observed one and two hops upstream of AS61231 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

220

adjacent networks

Upstreams
3918%
Peers
14968%
Downstreams
3215%

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

Upstreams of AS61231
NetworkCountryRelationshipPathsVantage pts
AS174Cogent Communications, LLCUSPeer3,12985
AS6762Telecom Italia Sparkle (Seabone)ITPeer1,68956
AS6939Hurricane Electric LLCUSPeer36320
AS6667Elisa OyjFIPeer3624
AS18106Viewqwest Pte LtdSGPeer2384
AS25091IP-Max SACHPeer2045
AS8455atom86 BVNLPeer1672
AS39122Blacknight Internet Solutions LimitedIEPeer1342
AS34549meerfarbig GmbH & Co. KGDEPeer1233
AS52075Wifirst S.A.S.FRPeer1202

Prefixes

The largest blocks AS61231 originates, widest first.

Largest prefixes originated by AS61231
PrefixAddressesVisibility
161.12.0.0/1732.8k80/81
155.136.224.0/221k80/81
185.14.144.0/221k80/81
155.136.198.0/2351280/81
155.136.230.0/2351280/81
155.136.232.0/2351280/81
194.169.150.0/2425680/81
194.169.151.0/2425680/81
2a02:f9c0::/2934.4B × /6461/64

Routing health

How AS61231'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

  • Valid0.0%0
  • Invalid0.0%0
  • No ROA100.0%9

Propagation

  • Globally propagated90% of full-feed peers or more100.0%9
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 8 prefixes

IPv6 — 1 prefixes

  • /2934.4B × /64100.0%1

Recent changes

Announcements that started or stopped since 28th Aug 2026.

No announcement by AS61231 started or stopped in this period.

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