IMEI number format check

Client

IMEI number format check is head-term phrasing for validating whether a pasted string looks like a proper GSM IMEI or IMEISV. Run length guards and Luhn before carrier portals or resale listings.

When format check is enough

Use format check to eliminate typos before expensive manual review. Follow with carrier or OEM tools when you need lock, warranty, or registry answers.

Privacy: digits are parsed only in your browser—no carrier or GSMA lookup, no upload. Treat device identifiers like any sensitive paste on shared machines.
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A 15-digit IMEI is commonly described as eight-digit TAC + six-digit serial + Luhn check digit; the trailing digit should satisfy ISO/IEC 7812 mod 10 on the full string—same arithmetic as debit/credit PAN checks. A 16-digit IMEISVappends two software version digits instead of exposing the standalone check position; carriers may still relate it to IMEI numbering but this page stops at segmentation and does not certify assignment.

Result

Passes Luhn mod 10 on the 15-digit string.

  • TAC (8): 35693803
  • Serial (6): 564380
  • Check (1): 9

Common use cases

  • IMEI number format check on marketplace seller submissions.
  • Gate CRM imports where IMEI column quality is unknown.
  • Quick format check during phone collection drives.

Common mistakes to avoid

  • Format check confused with IMEI number lookup services

    Lookup services query external data—this is local format only.

  • Passing format check then skipping physical inspection

    Format does not detect swapped or refurbished boards.

  • Spaces or dashes breaking paste

    Tool strips non-digits—verify stripped result matches intent.

FAQ

How many digits in IMEI number?

Standard GSM IMEI is 15 digits; IMEISV is typically 16.

Format check vs full IMEI check?

Same validation engine—this page emphasizes format-focused searches.

International IMEI format?

Decimal layout is global—carrier policies vary separately.

Common search terms

Phrases people search for that match this tool. See the full long-tail keyword index.

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More tools

Related utilities you can open in another tab—mostly client-side.