List of ISBN registration groups

The registration group or identifier group is the second element in a 13-digit ISBN (first element in a 10-digit ISBN) and indicates the country, geographic region, or language area where a book was published. The element ranges from one to five numerical digits. In 2007, the length of an ISBN changed from 10 to 13 digits, and a new 3-digit prefix (978 or 979) was added in front of 10-digit ISBNs. The following registration groups are compatible with or without a 978- prefix: * 0–5, 7 * 600–649 * 80–94 * 950–989 * 9900–9989 * 99900–99999 The following must have a 979- prefix:

List of ISBN registration groups

The registration group or identifier group is the second element in a 13-digit ISBN (first element in a 10-digit ISBN) and indicates the country, geographic region, or language area where a book was published. The element ranges from one to five numerical digits. In 2007, the length of an ISBN changed from 10 to 13 digits, and a new 3-digit prefix (978 or 979) was added in front of 10-digit ISBNs. The following registration groups are compatible with or without a 978- prefix: * 0–5, 7 * 600–649 * 80–94 * 950–989 * 9900–9989 * 99900–99999 The following must have a 979- prefix: