subnet.im

AS37305Frontier Optical Networks Ltd

KenyaRegistryAFRINIC

As of 23rd October 2026, AS37305 (Frontier Optical Networks Ltd), a network registered in Kenya with AFRINIC, originates 19 IPv4 prefixes covering 8.2k addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 11,840th-largest of the 79,663 networks we see originating IPv4, and the 18th-largest of 220 in Kenya. It is seen behind 4 upstream networks, most often AS37100 (SEACOM Limited) and AS37662 (West Indian Ocean Cable Company (WIOCC)), and in front of 7 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

19

IPv6 prefixes

1

IPv4 addresses

8.2k

IPv6 /64s

4.3B

Upstream graph

The networks AS37305 is seen behind, one and two hops out, drawn from real AS paths.

AS37305Toward the internet core
Upstream graph for AS37305: 10 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS37305Frontier Optical …This networkAS6939Hurricane Electri…AS37100SEACOM LimitedAS37662West Indian Ocean…AS58453China Mobile Inte…AS20130Depaul UniversityAS132337AxclusiveAS2914NTT America, Inc.AS174Cogent Communicat…AS6453TATA Communicatio…AS3356Lumen (Level 3)

Networks observed one and two hops upstream of AS37305 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

27

adjacent networks

Upstreams
415%
Peers
1659%
Downstreams
726%

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

Upstreams of AS37305
NetworkCountryRelationshipPathsVantage pts
AS37100SEACOM LimitedMUPeer2,81479
AS37662West Indian Ocean Cable Company (WIOCC)MUPeer1,111138
AS6939Hurricane Electric LLCUSPeer849
AS58453China Mobile InternationalHKPeer381

Prefixes

The largest blocks AS37305 originates, widest first.

Largest prefixes originated by AS37305
PrefixAddressesVisibility
197.231.176.0/212k77/77
41.79.8.0/221k77/77
102.212.132.0/221k77/77
41.79.8.0/2425677/77
41.79.9.0/2425677/77
41.79.10.0/2425677/77
41.79.11.0/2425677/77
102.212.132.0/2425677/77
102.212.133.0/2425677/77
102.212.134.0/2425677/77

Routing health

How AS37305'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%20
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more100.0%20
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 19 prefixes

IPv6 — 1 prefixes

  • /324.3B × /64100.0%1

Recent changes

Announcements that started or stopped since 23rd Sept 2026.

No announcement by AS37305 started or stopped in this period.

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