IBAN
Ireland IBAN format
A Ireland IBAN is 22 characters long and begins IE. Here is what each position holds.
At a glance
- Country code
- IE
- Total length
- 22 characters
- Structure after the check digits
4!a6!n8!n- SEPA area
- Yes
- Checksum
- ISO 7064 MOD-97-10
Position by position
| Part | Positions | Length |
|---|---|---|
| Country code | 1–2 | 2 |
| Check digits | 3–4 | 2 |
| Bank code | 5–8 | 4 |
| Sort code (NSC) | 9–14 | 6 |
| Account number | 15–22 | 8 |
Positions are counted across the whole IBAN, starting at 1.
Reading the structure
The structure 4!a6!n8!n describes everything after the
country code and check digits. Each group is a length followed by a character type:
n means digits only, a means uppercase letters only, and
c means letters or digits. An exclamation mark means the length is fixed.
This matters when you are typing an IBAN by hand: in a group marked n, a letter O where a zero belongs is a structural error the checker will report, not a checksum failure.
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