subnet.im

AS31655Gamma Telecom Holdings Ltd

United KingdomRegistryRIPE NCCTypeEyeball

As of 23rd October 2026, AS31655 (Gamma Telecom Holdings Ltd), an access network registered in the United Kingdom with RIPE NCC, originates 36 IPv4 prefixes covering 614k addresses and 3 IPv6 prefixes. By IPv4 address space that makes it the 623rd-largest of the 79,658 networks we see originating IPv4, and the 15th-largest of 2,078 in the United Kingdom. It is seen behind 17 upstream networks, most often AS3356 (Lumen (Level 3)) and AS2914 (NTT America, Inc.), and in front of 6 downstream networks. 69% of its announcements have 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

36

IPv6 prefixes

3

IPv4 addresses

614k

IPv6 /64s

103B

Upstream graph

The networks AS31655 is seen behind, one and two hops out, drawn from real AS paths.

AS31655Toward the internet core
Upstream graph for AS31655: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS31655Gamma Telecom Hol…This networkAS2914NTT America, Inc.AS3356Lumen (Level 3)AS6939Hurricane Electri…AS13030Init7 (Switzerlan…AS18106Viewqwest Pte LtdAS49544i3D.net B.VAS3549Lumen (fka. Globa…AS20130Depaul UniversityAS132337AxclusiveAS215859Hetzner Cloud - S…AS1299Arelion (fka. Tel…AS56662Marcin Gondek

Networks observed one and two hops upstream of AS31655 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

65

adjacent networks

Upstreams
1726%
Peers
4265%
Downstreams
69%

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

Upstreams of AS31655
NetworkCountryRelationshipPathsVantage pts
AS3356Lumen (Level 3)USPeer1,407105
AS2914NTT America, Inc.USPeer1,39799
AS6939Hurricane Electric LLCUSPeer1254
AS13030Init7 (Switzerland) Ltd.CHPeer935
AS18106Viewqwest Pte LtdSGPeer822
AS8455atom86 BVNLPeer472
AS3170VeloxServ Communications LtdGBPeer472
AS32590Valve CorporationUSPeer452
AS49544i3D.net B.VNLPeer452
AS35280F5 Networks SARLFRPeer452

Prefixes

All 39

The largest blocks AS31655 originates, widest first.

Largest prefixes originated by AS31655
PrefixAddressesVisibility
51.52.0.0/1665.5k77/77
51.219.0.0/1665.5k77/77
79.74.0.0/1665.5k77/77
92.207.0.0/1665.5k77/77
157.125.0.0/1665.5k77/77
157.231.0.0/1665.5k77/77
62.223.128.0/1732.8k77/77
138.248.128.0/1732.8k77/77
151.2.128.0/1732.8k77/77
164.39.128.0/1732.8k77/77

Routing health

How AS31655'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

  • Valid69.2%27
  • Invalid0.0%0
  • No ROA30.8%12

Propagation

  • Globally propagated90% of full-feed peers or more100.0%39
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 36 prefixes

IPv6 — 3 prefixes

  • /2934.4B × /64100.0%3

Recent changes

Announcements that started or stopped since 23rd Sept 2026.

No announcement by AS31655 started or stopped in this period.

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