subnet.im

AS18883FiberNet Communications L.C.

United StatesRegistryARIN

As of 14th November 2026, AS18883 (FiberNet Communications L.C.), a network registered in the United States with ARIN, originates 40 IPv4 prefixes covering 13.3k addresses and 2 IPv6 prefixes. By IPv4 address space that makes it the 9,170th-largest of the 80,840 networks we see originating IPv4, and the 2,870th-largest of 18,773 in the United States. It is seen behind 2 upstream networks, most often AS5056 (Aureon Network Services) and AS6939 (Hurricane Electric LLC), and in front of 5 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

40

IPv6 prefixes

2

IPv4 addresses

13.3k

IPv6 /64s

4.3B

Upstream graph

The networks AS18883 is seen behind, one and two hops out, drawn from real AS paths.

AS18883Toward the internet core
Upstream graph for AS18883: 5 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS18883FiberNet Communic…This networkAS5056Aureon Network Se…AS6939Hurricane Electri…AS1299Arelion (fka. Tel…AS20130Depaul UniversityAS132337Axclusive

Networks observed one and two hops upstream of AS18883 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

19

adjacent networks

Upstreams
211%
Peers
1263%
Downstreams
526%

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

Upstreams of AS18883
NetworkCountryRelationshipPathsVantage pts
AS5056Aureon Network ServicesUSPeer17,111142
AS6939Hurricane Electric LLCUSPeer5,02271

Prefixes

All 42

The largest blocks AS18883 originates, widest first.

Largest prefixes originated by AS18883
PrefixAddressesVisibility
23.247.204.0/221k78/78
64.29.184.0/221k78/78
167.142.108.0/2351278/78
173.215.56.0/2351277/78
198.211.136.0/2351278/78
207.177.20.0/2351278/78
208.126.180.0/2351277/78
208.126.194.0/2351277/78
67.55.137.0/2425678/78
70.39.13.0/2425678/78

Routing health

How AS18883'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%42

Propagation

  • Globally propagated90% of full-feed peers or more100.0%42
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 40 prefixes

IPv6 — 2 prefixes

  • /324.3B × /6450.0%1
  • /4865.5k × /6450.0%1

Recent changes

Announcements that started or stopped since 15th Oct 2026.

No announcement by AS18883 started or stopped in this period.

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