MIC format checker

Client

Market-data and trade-support files paste MIC codes beside ISIN, FIGI, or venue names. This page strips non-letters, confirms four uppercase characters, and surfaces ISO 10383 segment hints—pair with ISIN validate when the same row also lists a security identifier.

What this checks

A Market Identifier Code is four uppercase letters (ISO 10383) identifying an exchange or market segment. This tool strips non-letters, enforces length 4, and surfaces coarse operational vs market-segment hints—it does not prove the MIC is active in the ISO register.

Privacy: format checks run locally in your tab. Toolcore does not query the ISO 10383 MIC register or market-data vendors—layout hints only.
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After cleanup the code is 4 uppercase letters A–Z (ISO 10383). Digits are stripped and invalid—this page does not query the ISO MIC list for exchange names.

Result

Trade-capture rows often list MIC beside ISIN or FIGI—open ISIN validate or FIGI format check on the same instrument row.

Valid shape for XLON.

Normalized
XLON
Classification
operational

Shape matches a four-letter operational MIC—this page does not confirm the venue is still listed in the ISO register.

Nearby workflows on Toolcore

  • ISIN validate — when the same security master row lists an ISO 6166 ISIN beside the MIC.
  • FIGI format check — for OpenFIGI instrument symbols in cross-asset reference files.
  • LEI checksum — for legal-entity identifiers on the same issuer onboarding pack.

Common use cases

  • Sanity-check a MIC copied from a trade-capture or reference-data file before loading it into an internal security master.
  • Explain why a twenty-character MIC fails ISO 10383 layout while a related IBAN on the same row still passes its checksum.
  • Spot typos when desks paste venue names instead of the four-letter MIC in legacy CSV feeds.
  • Contrast MIC ISO 10383 layout with ISIN Luhn expansion when compliance teams mix entity and instrument identifiers.

Common mistakes to avoid

  • Treating a passing check as proof of listing or trading status

    Checksum validation confirms arithmetic only—not market status, segment eligibility, or regulatory approvals.

  • Pasting six-letter venue tickers

    MIC is exactly four letters—no checksum. XNAS and XNYS are operational codes; XXXX is the ISO placeholder when no MIC is assigned.

  • Expecting GMICF entity metadata

    Legal name, address, and registration status require GMICF or licensed feeds—this page performs local format math only.

FAQ

Does Toolcore query GMICF or the MIC registry?

No—the check digit and layout rules run entirely in your browser tab.

How does the check digit work?

Strip separators, keep A–Z only, require length 4, and read the fourth character for a coarse market-segment hint when applicable.

What is XXXX?

Check digits are two decimals in the range implied by ISO 10383 layout; this tool validates the published algorithm only—not whether the LOU still allocates the prefix.

Common search terms

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

  • mic checker iso 10383 exchange code
  • market identifier code format online
  • validate mic four letter browser
  • iso mic format no directory lookup

More tools

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