ISBN registration group
ISBN group 978-99988 — Sudan
ISBNs beginning 978-99988 are issued for Sudan. The group identifier has 5 digits.
Registrant (publisher) ranges
| Registrant range | Registrant digits | Publication digits | Titles per registrant | Registrants in range |
|---|---|---|---|---|
| 0–0 | 1 | 3 | 1,000 | 1 |
| 10–11 | 2 | 2 | 100 | 2 |
| 1200000–4999999 | — | — | — | Not yet assigned |
| 50–54 | 2 | 2 | 100 | 5 |
| 5500000–7999999 | — | — | — | Not yet assigned |
| 800–824 | 3 | 1 | 10 | 25 |
| 8250000–9999999 | — | — | — | Not yet assigned |
Shorter registrant numbers are issued to larger publishers (more publication digits = more titles).
Reading an ISBN from this group
Every ISBN in this group starts 978-99988-. The next digits are the registrant; look up which range the following seven digits fall into to know how long the registrant element is. For example, if the registrant has 1 digits, the publication element has 3 digits, then comes the check digit.
Check, convert or hyphenate any ISBN with the ISBN converter, and make a print-ready barcode with the ISBN barcode generator.
Sources & data
- International ISBN Agency RangeMessage (Fri, 2 Oct 2026 16:08:21 UTC).