Area Code 225 – Hai Phong City
The phone area code for Hai Phong City is 225 (international format +84225). Browse local exchange codes (NXX) and carrier assignments below.
📍 Geographic Location of Hai Phong City
Geographic Overview
Area code 225 is the National Destination Code (NDC) assigned to Hai Phong City, a major port city and one of Vietnam's five centrally governed municipalities. Located in the Red River Delta region, Hai Phong serves as a critical economic and maritime hub, with districts such as Hong Bang, Le Chan, Ngo Quyen, and Hai An falling under this code. The code covers both landline and fixed wireless services within the city's administrative boundaries.
Dialing Formats
For domestic callers outside Hai Phong, the full national format is 0 225 XXX XXXX, where the leading 0 is the trunk prefix. Within Hai Phong, local calls can be made using the seven-digit subscriber number alone (XXX XXXX), though some carriers may require the area code for certain services. International callers must dial +84 225 XXX XXXX, omitting the trunk prefix. For example, a landline in Hai Phong with the number 123 4567 would be dialed as +84 225 123 4567 from abroad.
Numbering Structure
Subscriber numbers under area code 225 are seven digits long, yielding a total national number length of ten digits (including the trunk prefix). The allocation follows the ITU-T E.164 recommendation, ensuring compatibility with global telecommunication networks. As of the latest updates, no overlay codes have been introduced for Hai Phong, meaning the 225 code remains exclusive to the city.
Caller Instructions
For local callers within Hai Phong, simply dial the seven-digit number. For domestic long-distance calls from other Vietnamese provinces or cities, dial 0225 followed by the subscriber number. International callers should use their country's exit code (e.g., 00 from most countries, 011 from the US/Canada) followed by 84, then 225, and the seven-digit number. Ensure you drop the leading '0' when dialing from abroad.
Service Considerations
Area code 225 is used for fixed-line services, including PSTN and VoIP-based landlines. Mobile numbers in Vietnam are not tied to geographic codes and use separate prefixes starting with 03, 05, 07, 08, or 09. When calling a Hai Phong landline from a mobile phone, the same dialing rules apply. Number portability allows users to retain their landline number when switching providers within the same geographic area, but porting outside the 225 area is not permitted.