| Estado Miembro | Structure (ES) | Format (ES)* |
| AT-Austria | ATU99999999 | 1 block of 9 characters (es) |
| BE-Bélgica | BE0999999999 | 1 block of 10 digits |
| BG-Bulgaria | BG999999999 or BG9999999999 (es) |
1 block of 9 digits or1 block of 10 digits (es) |
| CY-Chipre | CY99999999L | 1 block of 9 characters (es) |
| CZ-Chequia | CZ99999999 or CZ999999999 or CZ9999999999 (es) |
1 block of either 8, 9 or 10 digits (es) |
| DE-Alemania | DE999999999 | 1 block of 9 digits (es) |
| DK-Dinamarca | DK99 99 99 99 | 4 blocks of 2 digits (es) |
| EE-Estonia | EE999999999 | 1 block of 9 digits (es) |
| EL-Grecia | EL999999999 | 1 block of 9 digits (es) |
| ES-España | ESX9999999X4 | 1 block of 9 characters (es) |
| FI-Finlandia | FI99999999 | 1 block of 8 digits (es) |
| FR-Francia | FRXX 999999999 | 1 block of 2 characters, 1 block of 9 digits (es) |
| GB-Reino Unido | GB999 9999 99 or GB999 9999 99 9995 or GBGD9996 or GBHA9997 (es) |
1 block of 3 digits, 1 block of 4 digits and 1 block of 2 digits; or the above followed by a block of 3 digits; or 1 block of 5 characters (es) |
| HR-Croacia | HR99999999999 | 1 block of 11 digits |
| HU-Hungría | HU99999999 | 1 block of 8 digits (es) |
| IE-Irlanda | IE9S99999L IE9999999WI |
1 block of 8 characters or 1 block of 9 characters |
| IT-Italia | IT99999999999 | 1 block of 11 digits (es) |
| LT-Lituania | LT999999999 or LT999999999999 (es) |
1 block of 9 digits, or 1 block of 12 digits (es) |
| LU-Luxemburgo | LU99999999 | 1 block of 8 digits (es) |
| LV-Letonia | LV99999999999 | 1 block of 11 digits (es) |
| MT-Malta | MT99999999 | 1 block of 8 digits (es) |
| NL-Países Bajos | NL999999999B998 | 1 block of 12 characters (es) |
| PL-Polonia | PL9999999999 | 1 block of 10 digits (es) |
| PT-Portugal | PT999999999 | 1 block of 9 digits (es) |
| RO-Rumania | RO999999999 | 1 block of minimum 2 digits and maximum 10 digits (es) |
| SE-Suecia | SE999999999999 | 1 block of 12 digits (es) |
| SI-Eslovenia | SI99999999 | 1 block of 8 digits (es) |
| SK-Eslovaquia | SK9999999999 | 1 block of 10 digits (es) |
Remarks:
*: Format excludes 2 letter alpha prefix
9: A digit
X: A letter or a digit
S: A letter; a digit; "+" or "*"
L: A letter (ES)
Notes:
1: The 1st position following the prefix is always "U".
2: The first digit following the prefix is always zero ('0').
3: The (new) 10-digit format is the result of adding a leading zero to the (old) 9-digit format.
4: The first and last characters may be alpha or numeric; but they may not both be numeric.
5: Identifies branch traders.
6: Identifies Government Departments.
7: Identifies Health Authorities.
8: The 10th position following the prefix is always "B". (ES)