Area Code 53 – Hamhung
The phone area code for Hamhung is 53 (international format +85053). Browse local exchange codes (NXX) and carrier assignments below.
📍 Geographic Location of Hamhung
Geographic Coverage and Administrative Jurisdiction
The +850 53 country-code and prefix combination routes calls to the Hamhung metropolitan area, the second-largest city in the Democratic People's Republic of Korea (DPRK). Hamhung serves as the capital of South Hamgyong Province and is a major industrial and administrative hub on the country's eastern coast. The geographic numbering area includes the central districts of Hamhung, the adjacent port city of Hungnam, and surrounding localities within the provincial jurisdiction. As with all North Korean landline numbers, the prefix is tied to the PSTN infrastructure operated by the state-run Korea Posts and Telecommunications Corporation (KPTC).
Dialing Formats and Caller Instructions
International callers must use the full E.164 format: +850 53 XXXX XXX (or +85053XXXXXXX when dialed without spaces). The national significant number consists of the area code (53) followed by a seven-digit subscriber number. For example, a Hamhung landline might be dialed internationally as +850 53 123 4567.
Local callers within North Korea dial the area code followed by the subscriber number, typically omitting the trunk prefix '0' that is used in many countries. However, due to the closed nature of the DPRK's telecommunications network, international direct dialing is generally not available to the public; calls are often routed through operator assistance or specialized international exchanges. Foreign callers should verify with their service provider that international calling to North Korea is supported, as many carriers restrict or block such calls for regulatory reasons.
Overlays and Numbering Plan Considerations
North Korea's numbering plan does not currently employ overlay codes or permissive dialing procedures. The 53 area code is exclusively assigned to the Hamhung region, and no other area codes share its geographic footprint. Subscriber numbers are fixed in length, and there is no mobile number portability affecting landline prefixes. Mobile services in North Korea use separate non-geographic prefixes (such as 191, 192, and 193) and are not reachable via the 53 code.
Practical Usage Notes
Because of the limited international connectivity and state-controlled telecommunications, calls to Hamhung may experience poor voice quality, high latency, or unexpected disconnections. Businesses and individuals attempting to reach contacts in Hamhung should consider alternative communication channels, such as satellite phones or messaging services, if available. For emergency or official purposes, coordination through diplomatic channels is often necessary.