US IP Address Lookup | Locate United States IPs
Looking to check the origin of a US IP address? The United States holds the largest block of IP address spaces globally. Whether you need to track an IP location in the USA for security, check a visitor's state for compliance, or use our free lookup my public IP tool, this system provides accurate geographical and network insights.
Interactive United States IP Location Finder
Search for any IP address or domain to get instantly geolocated results.
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Your Detected IP Address
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United States Internet Overview
The US internet infrastructure is highly developed, featuring a mix of fiber, cable, satellite (like Starlink), and 5G connections. IP geolocation mapping in the United States is generally highly accurate because the registry records from ARIN (American Registry for Internet Numbers) are well-maintained, and IP blocks are closely mapped to regional postal ZIP codes and metropolitan areas.
Does Your IP Address Change?
Most home broadband and mobile connections in United States get a dynamic public IP address, so it can change when your router reconnects or your provider reassigns it. Many mobile networks also put customers behind carrier-grade NAT, where one public address is shared. Static addresses are usually a paid business option.
United States Network Facts
IPv6 Adoption
See live data
Regional Internet Registry
ARIN
IPv6 adoption changes month to month, so we don't quote a fixed number. See Google's per-country IPv6 statistics for the current figure. IP addresses in United States are allocated by ARIN.
Major ISPs in United States
- 1Comcast Xfinity
- 2Charter Spectrum
- 3AT&T Internet
- 4Verizon Fios
- 5Cox Communications
Top Hosting Providers
- 1Amazon Web Services (AWS)
- 2Microsoft Azure
- 3DigitalOcean
- 4Linode (Akamai)
- 5Equinix
United States IP Address Space in Numbers
As of 25 September 2026, the regional internet registries list 1.61 billion IPv4 addresses (1,606,124,960) as delegated to 26,727 organisations in the United States: 43.55% of all delegated IPv4 space, the largest share of any country. Organisations there also hold 10,797 IPv6 blocks and 32,200 autonomous system numbers (ASNs).
IPv4 addresses registered
1.61 billion
Share of world IPv4
43.55% (#1)
IPv6 blocks
10,797
AS numbers (ASNs)
32,200
Networks with the most IPv4 addresses in the United States
The five networks with the most IPv4 addresses in the United States hold 34.5% of the 1.46 billion addresses that geolocate there, out of 19,680 networks in total.
- AS749 · United States Department of Defense (DoD)14.1%
- AS16509 · Amazon.com, Inc.6.8%
- AS7018 · AT&T Enterprises, LLC6.2%
- AS7922 · Comcast Cable Communications, LLC4.6%
- AS701 · Verizon Business2.8%
Check any network's details with our ASN lookup.
Where those addresses geolocate
Share of the United States's geolocated IPv4 addresses by city.
- Columbus, Ohio12.1%
- New York7.2%
- Whitehall, Ohio5.7%
- Ashburn, Virginia4.6%
- Seattle, Washington2.6%
How to read these numbers
The registry figures count addresses delegated to organisations based in the United States. The network and city figures count the 1.46 billionIPv4 addresses that geolocate there, which is why the two totals differ. Large address blocks usually geolocate to the owner's headquarters or data centres, so a city's share reflects where networks are registered and hosted, not how many people are online there. Some big holders, such as government, university or corporate networks, are not consumer ISPs at all.
Registries, exchanges and privacy rules in the United States
- Country domain
- .us is run by a registry operator under contract with the US Department of Commerce (NTIA).
- IP address registry
- ARIN allocates addresses in the United States.
- Main internet exchange points
- Equinix Internet Exchange (Ashburn and other metros), DE-CIX New York and NYIIX. Networks exchange traffic directly here instead of through distant transit providers.
- Privacy law
- No single federal privacy law; state laws such as the California Consumer Privacy Act (CCPA). The CCPA lists IP addresses as an example of personal information.
Sources: NRO combined RIR delegation statistics, file dated 25 September 2026; DB-IP IP to City Lite and IP to ASN Lite (2026-09) (CC BY 4.0). Network and city shares are IP Dekho's analysis of the DB-IP data (IPv4 only), updated monthly.
IPv6 Transition & Adoption
Next Generation Protocol Deployment
IPv6 is widely deployed in the US, especially on mobile networks. Most mobile carriers, including T-Mobile and Verizon Wireless, have fully migrated to dual-stack or IPv6-only routing for cellular data. This migration was accelerated by the exhaustion of IPv4, highlighting IP geolocation accuracy issues. Traditional home broadband providers are also migrating their equipment, though older legacy systems still rely on IPv4.
How to Use the Location Finder
To track any US-based IP, enter the address into the lookup tool above. Within a few seconds, the lookup shows the state, city, network provider, ASN, and approximate coordinates. You can also test your own current connection by searching with an empty box, or run an ASN lookup to check carrier ownership details.
Submit IP/Domain
Type any valid IP or site domain in the input above.
Verify Details
Analyze ISP, geolocation state/city, coordinates and timezone records.
Audit Network
Utilize the returned metrics to troubleshoot latency or perform compliance checks.
Benefits of United States IP Lookup
- Filter and target traffic by specific US states or metropolitan statistical areas (MSAs) while learning how ISPs track you.
- Comply with state privacy laws like California's CCPA by detecting the visitor's state and understanding how geo-blocking works.
- Check whether an IP belongs to a hosting provider, mobile carrier, or residential ISP by looking up its network with an ASN lookup.
- Find approximate coordinates to personalize web experiences.
Common Use Cases
Broadcasters checking user location to enforce local sports blackouts.
Ad networks serving localized campaigns for specific cities or congressional districts.
Online merchants flagging suspicious orders where the shipping country differs from the IP country.
IT security systems logging employee login locations to flag unusual out-of-state access.
Frequently Asked Questions
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Integrate IP Geolocation Anywhere
Need to geolocate visitors at scale? We're building a developer API for IP geolocation, ISP, and network data. In the meantime, the lookup tool above is free to use.
