Area Code 423 – Guassem
The phone area code for Guassem is 423 (international format +218423). Browse local exchange codes (NXX) and carrier assignments below.
📍 Geographic Location of Guassem
Overview of Area Code +218 423
Area code 423 is a geographic destination code within the Libyan national numbering plan, assigned to the town of Guassem (also spelled Qasr al-Qarabulli or Gasr Garabulli) and its surrounding administrative district. The code forms part of the international dialing prefix +218 423, where +218 is Libya's country calling code as designated under ITU-T E.164. When dialing from abroad, callers must replace the leading zero of the national prefix with the plus sign and country code. For example, a local landline number in Guassem might be formatted as 0423 XXX XXX within Libya, while international callers would dial +218 423 XXX XXX.
Geographic Coverage and Administrative Jurisdiction
Guassem is located in the northwestern region of Libya, within the Murqub District (formerly part of the larger Tripolitania region). The area code serves the town center and nearby rural communities, providing fixed-line PSTN services. As a geographic code, it is tied to the physical location of the subscriber's line, and the number range is administered by the Libyan Telecom & Technology (LTT) and other licensed operators under the authority of the General Authority for Communications and Informatics (GACI).
Dialing Formats and Caller Instructions
- National dialing (within Libya): Dial 0423 followed by the subscriber's 6-digit number (total 9 digits after the trunk prefix 0). Example: 0423 123 456.
- International dialing (from abroad): Dial your country's exit code (e.g., 00 from most European countries, 011 from the US/Canada), then 218, then 423, then the 6-digit number. Example: +218 423 123 456.
- Calling from a mobile phone: Always use the international format with a plus sign: +218 423 123 456.
Overlay and Numbering Considerations
Currently, there is no overlay code for the Guassem area. The 423 code is unique to this geographic region, and callers must use the full national or international prefix to complete calls. As Libya continues to modernize its telecommunications infrastructure, fixed-line services are increasingly interconnected with mobile and VoIP networks, but the geographic nature of 423 remains unchanged. When calling from abroad, ensure you omit the leading '0' of the national prefix. For local callers within Guassem, short-dialing between nearby exchanges may be possible, but the standard format is recommended for reliability.