subnet.im

AS3713ICF International

United StatesRegistryARIN

As of 27th September 2026, AS3713 (ICF International), a network registered in the United States with ARIN, originates 17 IPv4 prefixes covering 7.7k addresses and 2 IPv6 prefixes. By IPv4 address space that makes it the 12,734th-largest of the 79,525 networks we see originating IPv4, and the 3,723rd-largest of 18,428 in the United States. It is seen behind 3 upstream networks, most often AS3356 (Lumen (Level 3)) and AS20355 (DartPoints Operating Company, LLC). 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

17

IPv6 prefixes

2

IPv4 addresses

7.7k

IPv6 /64s

131k

Upstream graph

The networks AS3713 is seen behind, one and two hops out, drawn from real AS paths.

AS3713Toward the internet core
Upstream graph for AS3713: 8 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS3713ICF InternationalThis networkAS3356Lumen (Level 3)AS20355DartPoints Operat…AS393423NTT Global Data C…AS3549Lumen (fka. Globa…AS2914NTT America, Inc.AS3257GTT Communication…AS5009REVAS6461Zayo Bandwidth

Networks observed one and two hops upstream of AS3713 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

6

adjacent networks

Upstreams
350%
Peers
350%
Downstreams
00%

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

Upstreams of AS3713
NetworkCountryRelationshipPathsVantage pts
AS3356Lumen (Level 3)USPeer1,13481
AS20355DartPoints Operating Company, LLCUSPeer290145
AS393423NTT Global Data Centers Americas, INC.USPeer8181

Prefixes

The largest blocks AS3713 originates, widest first.

Largest prefixes originated by AS3713
PrefixAddressesVisibility
199.223.16.0/212k81/81
199.223.24.0/221k81/81
199.223.28.0/221k81/81
199.223.16.0/2425681/81
199.223.17.0/2425681/81
199.223.18.0/2425681/81
199.223.19.0/2425681/81
199.223.20.0/2425681/81
199.223.21.0/2425681/81
199.223.22.0/2425681/81

Routing health

How AS3713'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%19

Propagation

  • Globally propagated90% of full-feed peers or more100.0%19
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 17 prefixes

IPv6 — 2 prefixes

  • /4865.5k × /64100.0%2

Recent changes

Announcements that started or stopped since 28th Aug 2026.

No announcement by AS3713 started or stopped in this period.

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