subnet.im

AS29107Synapse Network LTD

United KingdomRegistryRIPE NCCTypeEyeball

As of 27th September 2026, AS29107 (Synapse Network LTD), an access network registered in the United Kingdom with RIPE NCC, originates 23 IPv4 prefixes covering 58.9k addresses and 2 IPv6 prefixes. By IPv4 address space that makes it the 4,153rd-largest of the 79,516 networks we see originating IPv4, and the 89th-largest of 2,074 in the United Kingdom. It is seen behind 13 upstream networks, most often AS6698 (Virtual Systems LLC) and AS50263 (A-Systems Sp. z o.o.), and in front of 6 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

23

IPv6 prefixes

2

IPv4 addresses

58.9k

IPv6 /64s

131k

Upstream graph

The networks AS29107 is seen behind, one and two hops out, drawn from real AS paths.

AS29107Toward the internet core
Upstream graph for AS29107: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS29107Synapse Network L…This networkAS3356Lumen (Level 3)AS6698Virtual Systems L…AS6762Telecom Italia Sp…AS13249PRIVATE JOINT STO…AS50263A-Systems Sp. z o…AS3549Lumen (fka. Globa…AS174Cogent Communicat…AS2914NTT America, Inc.AS6939Hurricane Electri…AS3326Datagroup PJSCAS3257GTT Communication…AS132337Axclusive

Networks observed one and two hops upstream of AS29107 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

63

adjacent networks

Upstreams
1321%
Peers
4470%
Downstreams
610%

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

Upstreams of AS29107
NetworkCountryRelationshipPathsVantage pts
AS6698Virtual Systems LLCUAPeer2,41975
AS50263A-Systems Sp. z o.o.PLPeer41621
AS13249PRIVATE JOINT STOCK COMPANY "DATAGROUP"UAPeer32678
AS3356Lumen (Level 3)USPeer14865
AS6762Telecom Italia Sparkle (Seabone)ITPeer5313
AS3303Swisscom (Schweiz) AGCHPeer411
AS49544i3D.net B.VNLPeer391
AS24940Hetzner Online GmbHDEPeer381
AS32590Valve CorporationUSPeer381
AS6939Hurricane Electric LLCUSPeer117

Prefixes

The largest blocks AS29107 originates, widest first.

Largest prefixes originated by AS29107
PrefixAddressesVisibility
178.54.0.0/1732.8k81/81
92.249.64.0/1816.4k81/81
77.87.144.0/221k81/81
77.87.148.0/221k81/81
194.0.88.0/221k81/81
195.69.84.0/221k81/81
193.201.80.0/2351281/81
194.0.88.0/2351281/81
194.0.90.0/2351281/81
195.69.84.0/2351281/81

Routing health

How AS29107'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%25
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more100.0%25
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 23 prefixes

IPv6 — 2 prefixes

  • /4865.5k × /64100.0%2

Recent changes

Announcements that started or stopped since 28th Aug 2026.

No announcement by AS29107 started or stopped in this period.

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