IMEI Validator
Use this free IMEI Validator to quickly get accurate results in seconds, free and instantly offline with no signup required ever, trusted by professionals in Austin, Chicago, Miami, Denver, Seattle, and New York for reliable daily use without accounts, subscriptions, limits, or delays on any device for everyday personal and business workflows daily.
Verify that an IMEI number passes the Luhn check digit calculation with this free IMEI validator for phone and device checks.
Calculator Inputs
About IMEI Check
Use this free IMEI Validator to quickly get accurate results in seconds, free and instantly offline with no signup required ever, trusted by professionals in Austin, Chicago, Miami, Denver, Seattle, and New York for reliable daily use without accounts, subscriptions, limits, or delays on any device for everyday personal and business workflows daily.
How the Luhn algorithm validates IMEI: Every genuine 15-digit IMEI ends in a check digit computed by the Luhn mod-10 algorithm over the preceding fourteen digits. This validator strips spaces, dashes, and formatting characters, runs the checksum, and reports whether the number is structurally valid — all in seconds.
TAC, serial, and check digit breakdown: The first 8 digits form the Type Allocation Code (TAC) assigned by GSMA to identify the device manufacturer and model. Digits 9 through 14 are the serial number unique to each unit. Digit 15 is the Luhn check digit. The tool decodes all three segments and displays them in a clear breakdown.
What structural validity means: A valid IMEI passes the mathematical checksum, but this does not confirm the device is genuine, not stolen, or registered with a carrier. GSMA blacklist databases and carrier activation records are separate systems. Always check those before purchasing a used device.
Privacy and security guarantees: The Luhn calculation runs entirely in your browser using pure JavaScript. No IMEI number is transmitted to any external server, stored in a database, or logged. This makes the tool safe to use for high-volume device checks in retail, repair, and enterprise environments.
Practical workflow for buyers and sellers: Dial *#06# on any phone to display its IMEI, paste the 15 digits into the field, and hit validate. The tool instantly confirms validity and decodes the TAC. Use this when listing a $800 phone on 08/15/2026, processing a $2,500 trade-in on 10/01/2026, or auditing a corporate fleet before a 12/31/2026 asset review at $0 cost.
Where it is used
Austin resellers checking $350 used iPhone IMEIs before 09/10/2026 listings, Chicago repair shops validating $200 trade-in device serials, Miami pawnbrokers verifying $500 smartphone authenticity, Denver IT teams auditing 50-device corporate inventories worth $25,000, Seattle refurbishers testing $150 replacement screens against IMEI databases, and New York dealers confirming $1,200 flagship phone IMEIs before wholesale.
How to use the IMEI Check
- IMEI (15 digits) — enter the value (e.g. 490154203237518).
- Calculate — press the Calculate button to see the result instantly above.
Formula
Luhn mod-10 over 15 digits; first 8 = TAC model code.
Examples
Valid IMEI
Invalid checksum
Formatted input
Frequently Asked Questions
- Where do I find my IMEI?
- Dial *#06# on the phone, or check Settings then About phone. Dual-SIM phones show two IMEIs, one per SIM slot.
- Does valid mean the phone is not stolen?
- No. Validity is pure math based on the Luhn algorithm. Check carrier and GSMA blacklist databases separately before buying a used device.
- What is the TAC and why does it matter?
- The 8-digit Type Allocation Code identifies the device manufacturer and model. It is assigned by GSMA and can reveal the exact phone model even without physical access.
- Can an IMEI be valid but blacklisted?
- Yes. The checksum only confirms the number follows GSMA rules. A carrier can blacklist a valid IMEI if the device is reported lost or has an outstanding balance.
- How accurate is the Luhn check?
- It catches every single-digit transcription error and most multi-digit transpositions. It is the same algorithm used by credit card validators worldwide.
- Is my IMEI data stored anywhere?
- No. The entire validation runs in your browser. The number you paste never leaves your device, making this safe for sensitive device management tasks.