United States holds 1,606,217,632 IPv4 addresses from APNIC, ARIN, LACNIC and RIPE NCC.
Regional registries have allocated 1,606,217,632 IPv4 addresses in 70,495 blocks, 10,904 IPv6 blocks and 32,341 network numbers to organisations in United States, the first on 13 Dec 1982. By DB-IP’s count the largest network here is United States Department of Defense (DoD) (AS749).
Registered here vs used here
The RIR count is what was allocated to organisations registered in United States; DB-IP’s count is where it estimates addresses are used. DB-IP places 145,699,021 fewer IPv4 addresses in United States than were allocated here: some of those blocks are used abroad, which is a common reason databases disagree about a country.
Largest networks by IPv4 space in United States
IP Geolocation by DB-IP (ASN Lite × Country Lite, CC BY 4.0).
Allocations per year
Delegation records per year (IPv4 blocks + IPv6 blocks + ASN records) still current in the RIR files. Last 12 years shown.
Download the ranges
Every IPv4 and IPv6 range DB-IP Country Lite places in United States, as CSV. The file carries DB-IP’s attribution, which you must keep if you republish it.
Sources
- NRO RIR delegated-extended statistics · checked 6 Nov 2026
- DB-IP IP to Country Lite (CC BY 4.0) · checked 3 Nov 2026