Discover the intricacies of Sudan's telephone numbering plan, including number structures, dialing procedures, and technical considerations. This guide is essential for telecom professionals, developers, and anyone involved in Sudanese telecommunications.
Telephone Numbering Structure
General Number Structure
Sudan's telephone numbers are standardized by the National Telecommunications Corporation (NTC). The structure includes:
Country Code: +249
National (Significant) Number: 9 to 10 digits
Area Code/Network Code: 2 to 3 digits
Subscriber Number: 6 to 7 digits
Number Formats
Number Type
Format
Example
General Numbers
1[0-9]{8}
1912345678
Landline Numbers
1[58][35-7][0-9]{6}
1583456789
Mobile Numbers
1[0-2][0-9]{7} 9[0-3569][0-9]{7}
1201234567 9123456789
Toll-Free Numbers
800[0-9]{6}
800123456
Premium Numbers
900[0-9]{6}
900123456
Regular Expressions for Number Validation
General Numbers:
^1[0-9]{8}$
Landline Numbers:
^1[58][35-7][0-9]{6}$
Mobile Numbers:
^1[0-2][0-9]{7}$|^9[0-3569][0-9]{7}$
Toll-Free Numbers:
^800[0-9]{6}$
Premium Numbers:
^900[0-9]{6}$
Dialing Procedures
Domestic Calls
Landline to Landline: Dial the full number including the area code (e.g., 01587345678).
Landline to Mobile: Dial the mobile number directly (e.g., 0912345678).
Mobile to Mobile: Dial the mobile number directly (e.g., 0912345678).
International Calls
Outgoing from Sudan: Dial 00 followed by the country code, area code, and the local number (e.g., 00244123456789).
Incoming to Sudan: Dial +249 followed by the local number without the leading 0 (e.g., +249912345678).
Number Portability
Currently, Sudan does not support mobile number portability, meaning subscribers cannot retain their numbers when changing mobile operators.
Major Telecom Operators and Number Ranges
Operator
Number Range
Sudatel
091xxxxxxx
Zain Sudan
092xxxxxxx
MTN Sudan
099xxxxxxx
Canar Telecom
015xxxxxxx (Landline)
ITU-T Recommendations
Sudan's numbering plan complies with ITU-T Recommendation E.164, ensuring global uniqueness and dialability.
Number Allocation and Management
The National Telecommunications Corporation (NTC) manages the allocation of phone numbers, adhering to both national and international standards.
Technical Restrictions and Special Cases
Golden Numbers: No formal policy for premium or "golden" numbers exists.
Number Blocking: Certain numbers may be reserved for specific services, such as emergency or government use.
Technical Considerations for Developers
Key Points
Validation: Use the provided regex patterns to validate numbers.
Formatting: Store numbers in E.164 format for consistency.
Internationalization: Understand dialing procedures for international calls.
Number Length: Be aware of the 9 to 10 digit variability.