Also, sort codes for Northern Ireland branches of banks registered in both Northern Ireland and the Republic, are valid, and recognized for use in the Republic. In particular, the computer program that accepts an IBAN will be able to validate:
Is the country code valid?
?? which acts as a one-stop-shop for the payments industry.
Also the name of such a code varies. The Extended Industry Sorting Code Directory (EISCD)
The EISCD is a comprehensive database of payments-related information for financial institutions participating in the UK Payment Schemes: Bacs, CHAPS, Faster Payments and Cheque and Credit Clearing. Why up-to-date sort code data is important
The sort code data used by the UK payments industry is updated constantly to reflect bank and other financial institution changes.