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Testers

Free 51Degrees lookup tools, no signup. Find out what is my IP with location and network intelligence, check what is my user agent, look up any other IP address, paste in HTTP headers, or resolve a Type Allocation Code (TAC) to its device.

What is my IP address?

What is my IP address?

What is my IP address? See my IP, my user agent, my device, and my location all in one place.

My User-Agent tester

My User-Agent tester

Parse a User-Agent string or full set of HTTP headers into a device, OS, and browser.

IP address tester

Look up the location, network operator, and human-vs-bot signals for any IPv4 or IPv6 address.

TAC tester

Resolve a Type Allocation Code (the first 8 digits of an IMEI) to a device model.