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Currency Code Lookup & ISO 4217 Reference

Professional ISO 4217 database. Search active fiat, crypto, and historic currencies. Instant access to numeric codes, minor units, and symbols.

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About

In the fintech ecosystem, precision is binary: you are either correct or you have a transaction failure. The ISO 4217 standard is the backbone of global banking, defining the alpha codes (e.g., USD) and numeric codes (e.g., 840) required for international settlements.

This tool is engineered for developers, QA engineers, and financial analysts. It solves the friction of disparate data sources by unifying Active Fiat, Legacy Currencies (vital for historic audits), and Cryptocurrencies into a single, high-velocity search engine. Unlike generic lists, this database includes critical metadata such as the Minor Unit exponent (defining decimal precision) and Country Mappings.

Why Numeric Codes Matter?
In ISO 8583 payment messaging (credit card processing), the 3-digit numeric code is mandatory. A mismatch between USD (840) and USN (997, the Next Day Dollar) causes immediate settlement rejection.

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Formulas

When integrating currency data into software, handling Minor Units (decimals) is the most common source of calculation errors. The relationship between the Integer value stored in a database and the Display value is defined as:

Vdisplay = Vinteger10e

Where e is the exponent (Minor Unit). For example, the Bahraini Dinar (BHD) has e = 3. A database value of 1500 represents:

1500 รท 103 = 1.500 BHD

Reference Data

AlphaNumCurrencyMinor UnitRegion/Type
USD840US Dollar2North America
JPY392Japanese Yen0Asia Pacific
BHD048Bahraini Dinar3Middle East
CLF990Unidad de Fomento4South America (Fund)
XAU959Gold (Troy Oz)N/ACommodity
BTCN/ABitcoin8Crypto
EUR978Euro2Eurozone
KRW410South Korean Won0Asia Pacific
GBP826Pound Sterling2Europe
IQD368Iraqi Dinar3Middle East

Frequently Asked Questions

The Minor Unit indicates the number of decimal places used in the currency. Currencies like the Japanese Yen (JPY) or South Korean Won (KRW) do not use sub-units (cents) in everyday transactions; therefore, their exponent is 0. Conversely, the Bahraini Dinar (BHD) uses 3 decimal places (1000 Fils = 1 Dinar).
Legacy currencies should be mapped to their successor (e.g., DEM โ†’ EUR) with a fixed conversion flag. In ISO 4217, obsolete codes are never reused. If you are building a historical reporting tool, you must maintain a separate table for these "dead" codes to prevent them from being selected for active trading.
These are "Funds" or accounting units, not circulating cash. CLF (Unidad de Fomento) in Chile is an inflation-adjusted unit used for mortgages and loans. It tracks the CPI (Consumer Price Index) daily but is paid in CLP. Developers must treat these as distinct financial instruments.
No. ISO 4217 is maintained by the SIX Interbank Clearing. While "XBT" is the ISO-compatible code for Bitcoin (currencies not associated with a country start with 'X'), the market standard "BTC" is not yet an official ISO standard. This tool provides both for maximum compatibility.
Transaction decline. 840 is the standard US Dollar. 997 (USN) is the "Next Day" dollar fund. In a SWIFT message or ISO 8583 packet, the receiving bank's parser will reject the transaction if the numeric code does not match the account type.