Validate IMEI numbers with Luhn algorithm verification
Check if your IMEI is valid and get detailed breakdown of TAC, serial number, and check digit. Our validator uses the Luhn algorithm to verify IMEI authenticity instantly.
IMEI validation workflow
- 1 Enter your 15-digit IMEI number in the validator.
- 2 Get instant format and Luhn algorithm verification.
- 3 View detailed breakdown of TAC and serial number.
- 4 See clear valid/invalid result with explanation.
IMEI validation tool
Enter a 15-digit IMEI to verify its validity using the Luhn algorithm and decode its components.
Enter exactly 15 digits. Spaces and dashes will be removed automatically.
Bulk IMEI Validator
Validate multiple IMEI numbers at once. Paste up to 500 IMEIs — one per line, or separated by commas.
Enter one IMEI per line, or separate with commas. Maximum 500 IMEIs per batch.
Understanding IMEI structure
Every IMEI has three distinct parts that identify and validate the device
TAC (Type Allocation Code)
The first 8 digits identify the manufacturer and device model. Assigned by GSMA to each device family.
Serial Number
The next 6 digits are unique to each individual device of that model, like a production number.
Check Digit
The final digit is calculated using the Luhn algorithm to validate the entire IMEI number.
TAC Device Identification
Automatically identify the device brand and model from the IMEI
What is a TAC?
The Type Allocation Code (TAC) is the first 8 digits of an IMEI. It is assigned by the GSMA and uniquely identifies the device manufacturer and model. Our database covers popular devices from Apple, Samsung, Google, Xiaomi, OnePlus, and more.
Bulk Validation
Need to validate multiple IMEIs? Switch to Bulk Validation mode to check up to 500 IMEI numbers at once. Get a summary with valid/invalid counts, device identification for each, and export your results as CSV or JSON.
Explore Our IMEI Tools
Everything you need to generate, validate, and understand IMEI numbers
IMEI Validator FAQ
Common questions about IMEI validation and structure
How do I validate an IMEI number?
Enter your 15-digit IMEI number in the validator tool. It will check the format, verify the number using the Luhn algorithm, and display a breakdown showing the TAC (Type Allocation Code), serial number, and check digit.
What is the Luhn algorithm?
The Luhn algorithm (also called modulus 10 or mod 10 algorithm) is a checksum formula used to validate identification numbers like IMEIs. It detects common errors in number entry by performing mathematical calculations on each digit.
What is a TAC in an IMEI?
TAC stands for Type Allocation Code. It is the first 8 digits of an IMEI number and identifies the manufacturer and model of the device. Each device model has a unique TAC assigned by the GSMA.
Is IMEI validation accurate?
IMEI validation checks if a number follows the correct format and passes the Luhn algorithm. However, a valid IMEI format does not guarantee the device exists or is not blacklisted. For device status, contact your carrier.
What are the parts of an IMEI?
An IMEI has three parts: TAC (8 digits) identifies the manufacturer and model, Serial Number (6 digits) is unique to each device of that model, and Check Digit (1 digit) is calculated using the Luhn algorithm for validation.
Can I validate multiple IMEIs at once?
Yes! Switch to the "Bulk Validation" tab to validate up to 500 IMEI numbers simultaneously. You can paste them one per line or separated by commas. Results include validation status, device identification, and can be exported as CSV or JSON files.
How does the TAC device lookup work?
The first 8 digits of an IMEI form the Type Allocation Code (TAC), which identifies the device manufacturer and model. Our tool includes a database of popular devices from major brands like Apple, Samsung, Google, Xiaomi, and more. If a TAC isn't in our database, the IMEI can still be validated — the device simply won't be identified.