subnet.im

AS13876FiberLight, LLC

United StatesRegistryARIN

As of 27th September 2026, AS13876 (FiberLight, LLC), a network registered in the United States with ARIN, originates 56 IPv4 prefixes covering 40.7k addresses and 10 IPv6 prefixes. By IPv4 address space that makes it the 4,891st-largest of the 79,523 networks we see originating IPv4, and the 1,704th-largest of 18,427 in the United States. It is seen behind 13 upstream networks, most often AS1299 (Arelion (fka. Telia Carrier)) and AS3257 (GTT Communications Inc.), and in front of 59 downstream networks. 83% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. 98% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

56

IPv6 prefixes

10

IPv4 addresses

40.7k

IPv6 /64s

4.3B

Upstream graph

The networks AS13876 is seen behind, one and two hops out, drawn from real AS paths.

AS13876Toward the internet core
Upstream graph for AS13876: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS13876FiberLight, LLCThis networkAS1299Arelion (fka. Tel…AS2914NTT America, Inc.AS3257GTT Communication…AS3356Lumen (Level 3)AS6939Hurricane Electri…AS8888xTom Pty LtdAS13030Init7 (Switzerlan…AS3130RGnet OUAS49544i3D.net B.VAS6667Elisa OyjAS398465Rackdog LLCAS3549Lumen (fka. Globa…

Networks observed one and two hops upstream of AS13876 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

172

adjacent networks

Upstreams
138%
Peers
10058%
Downstreams
5934%

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

Upstreams of AS13876
NetworkCountryRelationshipPathsVantage pts
AS1299Arelion (fka. Telia Carrier)SEPeer14,484145
AS3257GTT Communications Inc.USPeer1,593145
AS2914NTT America, Inc.USPeer957108
AS3356Lumen (Level 3)USPeer36081
AS6939Hurricane Electric LLCUSPeer17518
AS49544i3D.net B.VNLPeer422
AS35280F5 Networks SARLFRPeer341
AS24482SG.GSSGPeer282
AS7195EdgeUnoCOPeer272
AS13786Seaborn (Seabras USA, LLC)USPeer251

Prefixes

All 66

The largest blocks AS13876 originates, widest first.

Largest prefixes originated by AS13876
PrefixAddressesVisibility
67.204.0.0/198.2k81/81
64.186.128.0/204.1k81/81
66.102.224.0/212k81/81
66.102.232.0/212k81/81
158.41.16.0/212k81/81
67.204.0.0/221k81/81
67.204.8.0/221k81/81
67.204.12.0/221k81/81
67.204.16.0/221k4/81
67.204.20.0/221k81/81

Routing health

How AS13876'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

  • Valid83.3%55
  • Invalid0.0%0
  • No ROA16.7%11

Propagation

  • Globally propagated90% of full-feed peers or more98.5%65
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%1.5%1

Prefix sizes

IPv4 — 56 prefixes

IPv6 — 10 prefixes

  • /324.3B × /6410.0%1
  • /4865.5k × /6490.0%9

Recent changes

Announcements that started or stopped since 28th Aug 2026.

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