IBAN formats allowing only numeric BBAN
The BBAN starts after country code and check digits, i.e. after position 4 of the electronic format.
Maps
Length frequency
As of 2012-08-10.
Some countries have numeric-only BBAN formats. The one with the highest frequency is the 20n format, being used by five countries.
Twelve countries use only full groups of four:
- 12 BE
- 16 BS, AT, EE, LT
- 20 CZ, SK, ES, SE, TN
- 24 HU, PL
Countries using formats that are only numeric after the country code and the check characters are:
| BBAN length | ISO 3166-1 alpha-2 codes for countries | Quantity of countries using that format | Length is a multiple of 4 |
|---|---|---|---|
| 11 | NO | 1 | no |
| 12 | BE | 1 | yes |
| 14 | FO, GL, FI (including AX), DK | 4 | no |
| 15 | SI | 1 | no |
| 16 | BS, AT, EE, LT | 4 | yes |
| 17 | HR, CR | 2 | no |
| 18 | DE, ME, RS | 3 | no |
| 19 | AE, IL | 2 | no |
| 20 | CZ, SK, ES, SE, TN | 5 | yes |
| 21 | PT | 1 | no |
| 22 | IS | 1 | no |
| 23 | MR | 1 | no |
| 24 | HU, PL | 2 | yes |
| 11-24 | 28 | 12 |
Hexdecimal representation
For a conversion from hex to decimal one may need to add leading zeros, i.e. knowledge of the length of the decimal IBAN is necessary.
16 digit hex
Numeric BBAN of up to 19 digits can be converted to 16 digit BBAN in hex.
- 9999 9999 9999 9999 9999 (20n, 99999999999999999999) is 56BC 75E2 D630 FFFF F (17h, 56BC75E2D630FFFFF)
- FFFF FFFF FFFF FFFF (16h, FFFFFFFFFFFFFFFF) is 1844 6744 0737 0955 1615 (20n, 18446744073709551615)
- Eleven countries use between 16 and 19 digits:
16 BS, AT, EE, LT 17 HR, CR 18 DE, ME, RS 19 AE, IL
20 digit hex
Numeric BBAN of up to 24 digits can be converted to 20 digit BBAN in hex.
- FFFF FFFF FFFF FFFF FFFF (20h, FFFFFFFFFFFFFFFFFFFF) is 1208 9258 1961 4629 1747 0617 5 (25n, 1208925819614629174706175)
- Ten countries use between 20 and 24 digits:
20 CZ, SK, ES, SE, TN 21 PT 22 IS 23 MR 24 HU, PL