A Market Identifier Code is a 4-character ISO 10383 code that uniquely identifies a securities trading exchange or venue worldwide. It is maintained by SWIFT as the registration authority and used in trade reporting, market data, and FIX protocol messages.

What is the difference between an operating MIC and a segment MIC?

An operating MIC identifies the entity that runs one or more markets, while a segment MIC identifies a specific market or order book within it. For example XNYS is the New York Stock Exchange operating MIC, and it has segment MICs for its different platforms.

Why do MIC codes often start with X?

By convention many exchange MICs begin with X followed by a city or country abbreviation, such as XLON for London and XTKS for Tokyo. The X is not mandatory, but it is the historical pattern for primary exchanges.

Are dark pools and ATSs assigned MICs?

Yes. ISO 10383 covers all regulated trading venues, including alternative trading systems, dark pools, and multilateral trading facilities, not just lit stock exchanges. Each gets its own MIC for transparent trade reporting.

How current is this MIC list?

MIC codes change as venues open, merge, or close, and the official list is updated monthly by SWIFT. Treat this as a reference for major venues and confirm against the official ISO 10383 registry before regulatory use.

MIC Stock Exchange Code Lookup

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A MIC code is the universal 4-letter identifier for a stock exchange or trading venue under ISO 10383. This tool lets you search major global venues by name, city, country, or code, and shows whether each is an operating or segment MIC.

How it works

Each MIC is a fixed 4-character code registered with SWIFT, the ISO 10383 registration authority. The standard distinguishes two levels:

Operating MIC — the legal entity running one or more markets (e.g. XNYS for the New York Stock Exchange).
Segment MIC — a specific market or order book operated under that entity.

Many primary exchanges follow the X + city/country pattern: XLON London, XTKS Tokyo, XPAR Paris, XETR Xetra (Frankfurt). Searching this directory matches your term against the code, name, city, and country.

Tips and examples

Use the MIC in FIX tag 207 (SecurityExchange) and in MiFID II / consolidated tape trade reports to say exactly where a trade executed.
A ticker alone is ambiguous — the same symbol can list on several venues, so the MIC disambiguates the actual market.
The official list is updated monthly; always reconcile against the ISO registry for compliance reporting.