Area Code 3123 – Kaloyanovo, Plovdiv

Geographic Overview

The area code 3123 is a geographic National Destination Code (NDC) within the Bulgarian numbering plan, assigned to the region of Kaloyanovo, a municipality in Plovdiv Province, central Bulgaria. Kaloyanovo is situated approximately 15 kilometers northeast of Plovdiv, the country's second-largest city, and serves as an administrative and agricultural hub for surrounding villages. This code is part of the Plovdiv telephony cluster, which historically used the prefix '032' for the city of Plovdiv and adjacent areas, but with the expansion of numbering resources, more localized NDCs like 3123 were introduced to accommodate demand.

Dialing Formats

When calling a fixed-line subscriber in Kaloyanovo, the standard international format is +359 3123 XXX XXX, where '359' is the country calling code for Bulgaria, '3123' is the area code, and the subscriber number typically consists of 6 to 7 digits. For domestic calls within Bulgaria, you must dial 0 3123 XXX XXX (the trunk prefix '0' is used to access the national network). For local calls within the same area code, it is often possible to omit the area code and dial only the subscriber number, but this depends on the specific operator's dialing plan. Always confirm with your service provider.

Geographic Coverage

The 3123 area code covers the municipality of Kaloyanovo, which includes the town of Kaloyanovo and several nearby villages such as Zhitnitsa, Ivan Vazovo, and others. The region is predominantly rural, with a mix of residential and agricultural activity. The code is used for fixed-line services (PSTN) and may also be used by VoIP providers offering geographic numbers in the area.

Caller Instructions

For international callers: Dial your country's international access code (e.g., 00 from most European countries, 011 from the US/Canada), followed by 359 (Bulgaria's country code), then 3123, and the local subscriber number. Example: +359 3123 456789.

For domestic callers outside the area: Dial 0, then 3123, then the subscriber number. Example: 0 3123 456789.

For local callers within the area: If your phone system supports 7-digit local dialing, you may dial only the subscriber number. However, due to number portability and multi-operator environments, it is safer to always use the full national format (0 3123 XXX XXX).

Numbering Plan Considerations

Bulgaria's numbering plan follows ITU-T E.164 recommendations. The maximum number length is 15 digits, but Bulgarian numbers are typically 12 digits including the country code. There are no overlay codes in this area; 3123 is a unique geographic code. Number portability is available, meaning a subscriber may retain their 3123 number even if they switch to a different operator, but the geographic tie remains.