Area Code 3629 – Most

Geographic Coverage and Administrative Jurisdiction

The +359 3629 area code is a geographic numbering resource allocated within the Bulgarian National Numbering Plan, administered by the Communications Regulation Commission (CRC). This prefix serves the town of Most and its surrounding localities in the Kardzhali Province, situated in the Southern Central planning region of Bulgaria. The area falls under the jurisdiction of the Kardzhali Municipality and is part of the Eastern Rhodopes mountain range, near the Greek border. The code is assigned to fixed-line PSTN services, and its use is restricted to the geographic territory of Most and adjacent villages, including those within the Momchilgrad and Dzhebel administrative boundaries.

Dialing Formats and Caller Instructions

For local callers within Bulgaria, the national significant number (NSN) for Most is 03629, followed by the subscriber number. The complete national dialing format is 03629 XXX XX, where the trunk prefix '0' is used for domestic calls. When dialing from abroad, callers must use the international format: +359 3629 XXX XX, omitting the leading '0'. For example, a local call to a subscriber in Most would be dialed as 03629 12345, while an international caller would dial +359 3629 12345. It is important to note that the area code is mandatory for all calls to Most, even from within the same geographic region, as per Bulgarian numbering regulations.

Numbering Plan and Overlay Considerations

As of the current CRC allocation, there is no overlay code for the 3629 area. The subscriber numbers within this prefix typically consist of 4 to 5 digits, making the total national number length 8 to 9 digits when including the area code. The geographic numbering capacity is limited, and the CRC has not announced any imminent changes. However, with the ongoing migration toward VoIP and NGN networks, some operators may route calls over IP backbones, but the dialing format remains unchanged for end-users.

Services and Usage

The +359 3629 code is primarily used for residential and business fixed-line services, including PSTN and ISDN connections. It supports standard voice calls, fax, and basic data services. Due to the rural nature of the region, broadband penetration is lower than in urban centers, but ADSL and cable internet services are available. Emergency services are reachable via the national numbers 112 (general emergency) and 160 (medical), which are accessible from any fixed line without the area code.

For international callers, it is essential to verify the correct country code (+359) and area code (3629) to avoid misdialing. The Bulgarian numbering plan follows ITU-T E.164 recommendations, ensuring global interoperability. When calling from a mobile phone, the same international format applies, and roaming charges may vary depending on the caller's carrier.