IP Address Lookup — Location & ISP Details
Look up IP address details: location, ISP, timezone, and organization. Includes subnet calculator and private IP checker. Free tool.
IP Utilities
IPv4 ↔ Decimal Converter
Subnet Calculator
Private IP Checker
About IP Address Lookup
Every device connected to the internet has an IP address. This tool looks up detailed information about any IP address including geographic location, ISP, organization, and timezone.
Uses the free ip-api.com service. Your current IP address is shown by default. Enter any public IP address to look up its details.
IP geolocation databases map IP address ranges to physical locations using data from regional internet registries (ARIN, RIPE, APNIC, LACNIC, AfriNIC). Country-level accuracy is typically 99%, but city-level accuracy ranges from 50-80% depending on the region and ISP. Mobile carriers and VPN services make geolocation particularly unreliable.
IPv4 addresses (like 192.168.1.1) use a 32-bit format providing about 4.3 billion unique addresses — a pool that is now exhausted. IPv6 addresses (like 2001:0db8::1) use 128 bits, providing 340 undecillion addresses. The transition to IPv6 is ongoing, with adoption varying by country. This tool supports both IPv4 and IPv6 lookups.
The subnet calculator included in this tool helps network administrators understand IP address allocation. Enter a CIDR notation (like 192.168.1.0/24) to see the network address, broadcast address, first and last usable host, subnet mask, and total number of hosts. The private IP checker identifies whether an address belongs to a reserved private range (10.x.x.x, 172.16-31.x.x, 192.168.x.x).
How the IP Address Lookup Works
- Enter an IP address or use your current public IP
- The tool queries geolocation databases for the IP's location data
- View the country, city, ISP, timezone, and approximate coordinates
- See the location plotted on an interactive map
Understanding IP Geolocation
IP geolocation is accurate to the country level in 99% of cases, but city-level accuracy drops to around 50-80% depending on the provider. VPNs, proxies, and mobile networks can make IP location data unreliable. IPv4 addresses (like 192.168.1.1) are being replaced by IPv6 (like 2001:db8::1) as the internet runs out of IPv4 space. Private IP ranges (10.x.x.x, 192.168.x.x) cannot be geolocated as they are internal network addresses.
When to Use the IP Address Lookup
Use this tool when you need to identify the geographic location of an IP address, when troubleshooting network connectivity issues, when investigating suspicious access in server logs, or when verifying that a VPN is masking your real location. Network administrators also use it for subnet calculations and IP range planning.
Common Use Cases
- •Investigating suspicious login attempts by checking the geographic origin of IP addresses
- •Verifying VPN connection by comparing your visible IP location with your actual location
- •Planning network subnets using the built-in CIDR calculator
- •Looking up ISP and organization information for abuse reporting
Expert Tips
- ✱Use the subnet calculator to plan IP address allocation before configuring network equipment.
- ✱Remember that IP geolocation shows where the IP is registered, not necessarily where the user is — VPNs, proxies, and mobile carriers affect accuracy.
- ✱Check the private IP tool when troubleshooting to quickly identify whether an address is internal or routable on the internet.
Frequently Asked Questions
- Country-level accuracy is about 99%. City-level accuracy ranges from 50-80%, depending on the region and ISP. IP geolocation uses databases that map IP ranges to locations based on registration data. Mobile carriers, VPNs, and cloud services can make location data unreliable — the IP may point to a data center rather than the actual user location.
- IPv4 uses 32-bit addresses (like 192.168.1.1) providing about 4.3 billion unique addresses — a pool that is now exhausted. IPv6 uses 128-bit addresses (like 2001:0db8::1) providing an essentially unlimited number of addresses. Both formats are in use during the ongoing transition. This tool supports lookups for both.
- Private IP ranges (10.x.x.x, 172.16-31.x.x, 192.168.x.x) are used within local networks and cannot be geolocated because they are not unique — millions of networks use the same private ranges internally. The tool will identify these as private addresses. Use it with public IP addresses for location data.
- A subnet divides a network into smaller segments. CIDR notation (like 192.168.1.0/24) specifies the network address and the number of fixed bits. /24 means the first 24 bits are the network portion, leaving 8 bits for hosts (254 usable addresses). The subnet calculator in this tool computes all related values from CIDR input.
How accurate is IP geolocation?▾
What is the difference between IPv4 and IPv6?▾
Can I look up a private IP address?▾
What is a subnet and CIDR notation?▾
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