subnet.im

AS13536FirstLight Networks, LLC

United StatesRegistryARIN

As of 27th September 2026, AS13536 (FirstLight Networks, LLC), a network registered in the United States with ARIN, originates 117 IPv4 prefixes covering 339k addresses and 11 IPv6 prefixes. By IPv4 address space that makes it the 894th-largest of the 79,525 networks we see originating IPv4, and the 220th-largest of 18,428 in the United States. It is seen behind 24 upstream networks, most often AS3770 (FirstLight Networks, LLC) and AS1299 (Arelion (fka. Telia Carrier)), and in front of 185 downstream networks. 45% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. 95% of its routes reach at least 90% of full-feed peers, and 8 prefixes are also originated by another network.

At a glance

IPv4 prefixes

117

IPv6 prefixes

11

IPv4 addresses

339k

IPv6 /64s

12.9B

Upstream graph

The networks AS13536 is seen behind, one and two hops out, drawn from real AS paths.

AS13536Toward the internet core
Upstream graph for AS13536: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS13536FirstLight Networ…This networkAS174Cogent Communicat…AS1299Arelion (fka. Tel…AS3257GTT Communication…AS3770FirstLight Networ…AS9002RETN LimitedAS151326DCConnect Communi…AS8888xTom Pty LtdAS13030Init7 (Switzerlan…AS6667Elisa OyjAS398465Rackdog LLCAS6939Hurricane Electri…AS51907Kanton Zug

Networks observed one and two hops upstream of AS13536 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

441

adjacent networks

Upstreams
245%
Peers
23253%
Downstreams
18542%

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

Upstreams of AS13536
NetworkCountryRelationshipPathsVantage pts
AS3770FirstLight Networks, LLCUSPeer24,17093
AS1299Arelion (fka. Telia Carrier)SEPeer13,436104
AS3257GTT Communications Inc.USPeer12,994127
AS174Cogent Communications, LLCUSPeer4,75145
AS9002RETN LimitedGBPeer1,49014
AS13030Init7 (Switzerland) Ltd.CHPeer1,1225
AS6939Hurricane Electric LLCUSPeer84223
AS49544i3D.net B.VNLPeer7442
AS18106Viewqwest Pte LtdSGPeer5572
AS35280F5 Networks SARLFRPeer4711

Prefixes

All 128

The largest blocks AS13536 originates, widest first.

Largest prefixes originated by AS13536
PrefixAddressesVisibility
143.66.0.0/1665.5k81/81
143.67.0.0/1665.5k81/81
150.155.128.0/1732.8k81/81
216.179.0.0/1732.8k81/81
150.155.0.0/1816.4k81/81
66.109.32.0/198.2k81/81
66.211.128.0/198.2k81/81
72.0.128.0/198.2k81/81
150.155.64.0/198.2k81/81
209.94.96.0/198.2k81/81

Routing health

How AS13536'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

  • Valid45.3%58
  • Invalid0.0%0
  • No ROA54.7%70

Propagation

  • Globally propagated90% of full-feed peers or more94.5%121
  • Partially propagated40% to 90%5.5%7
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 117 prefixes

IPv6 — 11 prefixes

  • /324.3B × /6427.3%3
  • /4865.5k × /6472.7%8

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.