Area Code 537 – Zarqa

Overview of Jordan's +962 537 Geographic Code

In the Jordanian national numbering plan, the prefix 537 is a Geographic Area Code assigned to the city of Zarqa, the country's second-largest urban center. As part of the ITU-T E.164 framework, this code is used for routing calls to fixed-line (PSTN) subscribers within the Zarqa governorate. The code is administered by the Telecommunications Regulatory Commission (TRC) of Jordan and is allocated exclusively to geographic wireline services, distinguishing it from mobile prefixes (e.g., 77, 78, 79) which are non-geographic.

Coverage and Administrative Jurisdiction

The 537 code covers the entire Zarqa Governorate, including the city of Zarqa itself, as well as neighboring towns and industrial zones such as Russeifa, Hashimiya, and Sukhna. Zarqa is a major industrial and logistics hub, home to numerous manufacturing facilities and the country's main military airbase. The geographic area served by 537 is part of the central region of Jordan, lying northeast of Amman.

Dialing Formats and Caller Instructions

When calling a fixed-line number in Zarqa from within Jordan, subscribers must dial the trunk prefix 0 followed by the area code 537 and the subscriber's 5- to 7-digit local number. For example, a local number might appear as 05 37 123 4567 (the full national format is 05 371 234 567 after the 2007 numbering reform). From abroad, callers must use the international prefix (typically + or 00), followed by Jordan's country code 962, then the area code without the leading zero, and the local number. Thus, the international format becomes +962 5 371 234 567.

For example:

• Local call (within Jordan): 05 371 234 567
• International call (from overseas): +962 5 371 234 567

Callers should note that the area code 537 is not an overlay; it is the sole geographic code for Zarqa. No other area codes are overlaid in this region, so local calls within Zarqa do not require the area code if dialed from another Zarqa landline, though using the full national format is always safe.

Technical and Regulatory Notes

Jordan's numbering plan follows a closed dialing plan for fixed lines, meaning that the trunk prefix 0 is always required for domestic calls, even for local calls. The subscriber number length within the 537 code can vary, but the total national significant number (NSN) is always 9 digits (including the leading 0). The TRC has mandated number portability for fixed lines, so a number with the 537 prefix may be routed to a different operator, but the geographic significance remains tied to the original allocation.

For businesses and individuals in Zarqa, the 537 code is essential for establishing a local presence and ensuring cost-effective communication within the region. International callers should always verify the correct number of digits, as older numbers may have fewer digits than newer ones.