subnet.im

AS13536FirstLight Networks, LLC

United StatesRegistryARIN

As of 11th November 2026, AS13536 (FirstLight Networks, LLC), a network registered in the United States with ARIN, originates 120 IPv4 prefixes covering 340k addresses and 11 IPv6 prefixes. By IPv4 address space that makes it the 911th-largest of the 80,747 networks we see originating IPv4, and the 225th-largest of 18,752 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 186 downstream networks. 45% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. 91% 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

120

IPv6 prefixes

11

IPv4 addresses

340k

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: 11 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…AS13030Init7 (Switzerlan…AS151326DCConnect Communi…AS16552Tiggee LLCAS6667Elisa OyjAS398465Rackdog LLCAS6939Hurricane Electri…AS56662Marcin Gondek

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

442

adjacent networks

Upstreams
245%
Peers
23252%
Downstreams
18642%

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

Upstreams of AS13536
NetworkCountryRelationshipPathsVantage pts
AS3770FirstLight Networks, LLCUSPeer21,99991
AS1299Arelion (fka. Telia Carrier)SEPeer14,52199
AS3257GTT Communications Inc.USPeer11,691130
AS174Cogent Communications, LLCUSPeer3,83647
AS13030Init7 (Switzerland) Ltd.CHPeer1,1505
AS24482SG.GSSGPeer8512
AS9002RETN LimitedGBPeer79511
AS6939Hurricane Electric LLCUSPeer75319
AS49544i3D.net B.VNLPeer7462
AS14537Continent 8 LLCUSPeer5964

Prefixes

All 131

The largest blocks AS13536 originates, widest first.

Largest prefixes originated by AS13536
PrefixAddressesVisibility
143.66.0.0/1665.5k76/76
143.67.0.0/1665.5k76/76
150.155.128.0/1732.8k76/76
216.179.0.0/1732.8k76/76
150.155.0.0/1816.4k76/76
66.109.32.0/198.2k76/76
66.211.128.0/198.2k76/76
72.0.128.0/198.2k76/76
150.155.64.0/198.2k76/76
209.94.96.0/198.2k76/76

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

  • Valid45.0%59
  • Invalid0.0%0
  • No ROA55.0%72

Propagation

  • Globally propagated90% of full-feed peers or more90.8%119
  • Partially propagated40% to 90%5.3%7
  • Seen by few peersUnder 40%3.8%5

Prefix sizes

IPv4 — 120 prefixes

IPv6 — 11 prefixes

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

Recent changes

Announcements that started or stopped since 12th Oct 2026.

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