IP Lookup United States
Find location, ISP, ASN, and network details for IP addresses registered in United States (US) under ARIN.
Use the IP lookup tool to enter any IP address and check if it is registered in United States. Our tool provides real-time geolocation data, ISP details, ASN, and VPN/proxy detection.
Open IP Lookup ToolInternet Infrastructure in United States
United States (US) has its IP address space managed by ARIN — the Regional Internet Registry responsible for IP allocation in this region. IP address blocks are allocated to ISPs, hosting providers, enterprises, and government networks operating within United States.
330M+ users, ~93% penetration
One of the highest IPv6 adoption rates globally (~50%+ of traffic)
FCC (Federal Communications Commission) governs IP allocation policy
ARIN manages the largest IPv4 block registry in the Americas; the US hosts the most globally routable ASNs of any single country.
Major ISPs in United States
The following Internet Service Providers hold IP address allocations from ARIN and operate networks within United States. When you look up an IP registered in United States, the ISP field will typically show one of these operators or a regional subsidiary.
What IP Data Is Available for United States?
Confirms if the IP is registered in United States (US) under ARIN.
Province, state, or administrative region within United States.
Approximate city location for the IP block (50–80% accuracy for most ISPs).
The internet service provider operating the IP in United States — one of: Comcast/Xfinity, AT&T, Verizon, and others.
Autonomous System Number identifying the network operator in United States's BGP routing table.
Whether the IP is a VPN server, proxy, or anonymization service operating in or through United States.
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Frequently Asked Questions
How do I find an IP address location in United States?
Use our IP lookup tool to enter any IP address and instantly get its location in United States. Our tool uses MaxMind GeoLite2 data to provide country, region, city, ISP, and ASN details for IPs registered in United States under the ARIN registry.
Which ISPs operate in United States?
United States's major Internet Service Providers include: Comcast/Xfinity, AT&T, Verizon, T-Mobile, Spectrum/Charter, Cox Communications. These ISPs are allocated IP address blocks by ARIN (the Regional Internet Registry for United States). Enter any IP from United States in our lookup tool to identify its specific ISP and ASN.
What is United States's Regional Internet Registry (RIR)?
IP address blocks in United States are managed by ARIN. The RIR allocates IP ranges to United States's ISPs, hosting providers, government networks, and enterprises. Each allocated block is registered with the ASN of the operator in the global BGP routing table.
How accurate is IP geolocation for United States?
Country-level geolocation for United States IPs is typically 95–99% accurate. City-level accuracy in United States ranges from 50–80% depending on the ISP. Fiber and fixed-line ISPs in United States tend to have better city-level accuracy than mobile networks.
What is IPv6 adoption like in United States?
One of the highest IPv6 adoption rates globally (~50%+ of traffic)
Can I find the exact address of an IP in United States?
No — IP geolocation provides city or region-level data for United States IPs, not street addresses. FCC (Federal Communications Commission) governs IP allocation policy. Only law enforcement with proper legal authorization can request subscriber information from United States's ISPs.
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Browse IP geolocation and ISP data for Australia (APNIC).