AS3713 ICF International

ICFCONSULTINGGROUPINC - ICF International · registered in the United States

IPv4 addresses4,0965 prefixes · <0.001% of announced IPv4

Rank in United States#4,566largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#15,496of 79,396 networks with IPv4

IPv62 x /482 prefixes

CountryUnited States18,679 ASNs registered there

Open AS3713 in ASN lookup Look up an IP in this network (199.223.16.1) All networks in United States

IPv4 prefixes

All 5 prefixes, in address order.

199.223.16.0/21
199.223.24.0/24
199.223.25.0/24
199.223.26.0/23
199.223.28.0/22

IPv6 prefixes

All 2 prefixes.

2604:d800:1001::/48
2620:7b:b000::/48

Similar-sized networks in United States

ASNNameIPv4 addresses

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AS15113#4565 AMX-LLC-AS - Harman International Industries Inc.4,096

AS214083#4567 NODEHUB NodeHub LLC4,096

AS394976#4568 ABACUS - Abacus Data Systems, Inc.4,096

AS397824#4569 ALASKA-PERMANENT-FUND-CORPORATION-AS-01 - Alaska Permanent Fund Corporation, an instrumentality of the State of Alaska4,096

IP-to-ASN data: iptoasn.com (public domain). Snapshot downloaded 2026-11-11, refreshed daily. Ranges are what each network announces in BGP, not registry allocations. Data sources