Is a valid checksum enough to trust a phone?
No. Checksum only proves the number is well-formed. Use blacklist / warranty checks and physical inspection for purchase decisions.
IMEI validator and TAC lookup
Answer first
This GSMSharing tool validates a 15-digit IMEI with the Luhn check digit.
TAC extraction and community device matching run on the server.
The form posts to the same HTML page so results stay in the initial response.
Quoted sentences on this page are complete claims, not sentence fragments.
| File Name: | IMEI validator and TAC lookup |
|---|---|
| Download Requirement: | No paid API is required for the local Luhn and TAC lookup |
Validate a 15-digit IMEI with the GSMA Luhn check digit, extract the Type Allocation Code (TAC), and match community device references. No paid API required.
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IMEI validator FAQ
What is TAC?
The first 8 digits identify the device type allocation. Serial digits follow, and the last digit is the check digit.