SUBNET.IM

AS16399First Communications LLC

United StatesRegistryARIN

At a glance

IPv4 prefixes

21

IPv6 prefixes

7

IPv4 addresses

129k

IPv6 /64s

1.9B

Upstream graph

The networks AS16399 is seen behind, one and two hops out, drawn from real AS paths.

AS16399Toward the internet core
Upstream graph for AS16399: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS16399First Communicati…This networkAS174Cogent Communicat…AS3356Lumen (Level 3)AS6461Zayo BandwidthAS40264Charter Communica…AS55089THE SEGERDAHL COR…AS1299Arelion (fka. Tel…AS2914NTT America, Inc.AS3549Lumen (fka. Globa…AS6667Elisa OyjAS32590Valve CorporationAS10796Charter Communica…AS20115Charter Communica…

Networks observed one and two hops upstream of AS16399 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

15

adjacent networks

Upstreams
533%
Peers
853%
Downstreams
213%

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

Upstreams of AS16399
NetworkCountryRelationshipPathsVantage pts
AS6461Zayo BandwidthUSPeer80562
AS3356Lumen (Level 3)USPeer54166
AS40264Charter Communications LLCUSPeer47326
AS174Cogent Communications, LLCUSPeer29448
AS55089THE SEGERDAHL CORP.USPeer1313

Prefixes

All 28

The largest blocks AS16399 originates, widest first.

Largest prefixes originated by AS16399
PrefixAddressesVisibility
168.93.64.0/1816.4k78/80
168.93.128.0/1816.4k78/80
64.27.128.0/198.2k80/80
66.244.160.0/198.2k80/80
67.206.64.0/198.2k80/80
69.7.192.0/198.2k79/80
74.222.32.0/198.2k80/80
168.92.0.0/198.2k78/80
207.135.160.0/198.2k80/80
216.21.32.0/198.2k80/80

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