Area Code 2321 – Serres
The phone area code for Serres is 2321 (international format +302321). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 2321
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Serres
Geographic Overview
The +30 2321 area code is a geographic National Destination Code (NDC) within the Hellenic Telecommunications Organization (OTE) numbering plan, assigned to the Serres regional unit in Central Macedonia, Greece. Serres is the capital of the region and a significant administrative, agricultural, and commercial hub. The code covers the city of Serres and its immediate suburbs, including the surrounding communities of Levkonas, Skoutari, and Neochori, as well as the broader Serres regional unit. As a geographic code, it is used for fixed-line PSTN and VoIP services that are physically located within this specific area.
Dialing Formats
When calling a Serres number from within Greece, subscribers must dial the national trunk prefix 0 followed by the area code and the subscriber number. The complete national format is 0 2321 XXXX, where XXXX is the 4-digit local subscriber number, yielding a total of 10 digits (including the leading 0). For example, a local number might be 0 2321 23456.
For international callers, the leading 0 is omitted, and the country code +30 is used. The international format is +30 2321 XXXX, so the same number would be dialed as +30 2321 23456. This format is essential for proper routing through international networks.
Caller Instructions
Local callers within Serres: When dialing another fixed-line number within the same area code, the full national format (including the area code) is still required in Greece. There is no local dialing without the area code; all calls must include the 0 and the 2321 prefix. For example, to call a neighbor, dial 0 2321 23456.
Callers from other Greek regions: Dial the national trunk prefix 0, then the area code 2321, followed by the subscriber number: 0 2321 23456.
International callers: Dial the international access code (e.g., 00 from most countries, or +), then the Greek country code 30, then the area code without the leading 0, and the subscriber number: +30 2321 23456.
Overlay and Numbering Considerations
As of the latest ITU-T and EETT (Hellenic Telecommunications and Post Commission) allocations, the 2321 area code does not have an overlay code. The numbering plan for Serres remains a single NDC. However, number portability is available in Greece, allowing subscribers to retain their fixed-line numbers when changing service providers, but the geographic significance of the code remains tied to the physical location of the line.
Usage and Services
The 2321 code is used for traditional PSTN lines, as well as fixed VoIP services that are registered to a physical address in the Serres area. It is not used for mobile services; Greek mobile numbers always begin with 69x prefixes. Businesses and residents in Serres rely on this code for local communications, and it is an integral part of the region's telecommunications infrastructure.