Area Code 2377 – Ierissos/Mount Athos

Overview of Area Code 2377

Area code 2377 is a geographic National Destination Code (NDC) assigned to the eastern part of the Chalkidiki peninsula in northern Greece. It serves the town of Ierissos and the surrounding communities, including the monastic state of Mount Athos (Agion Oros). The code is part of the Greek national numbering plan under the country calling code +30.

Geographic Coverage and Administrative Jurisdiction

The 2377 code covers the municipal unit of Ierissos, which belongs to the municipality of Aristotelis in the regional unit of Chalkidiki, within the administrative region of Central Macedonia. The area includes the coastal settlements along the eastern coast of the Athos peninsula, such as Nea Roda, Ouranoupoli, and the port of Ierissos. Mount Athos, an autonomous monastic state, is also within this numbering area, though its internal communications are limited and regulated.

Dialing Formats

When calling a landline in the 2377 area from within Greece, subscribers must dial the full national number: 23770 followed by the subscriber's 4-digit local number (e.g., 2377 0 1234). For international callers, the format is +30 23770 1234 (or +30 2377 0 1234). The Greek numbering plan uses a 10-digit national significant number (NSN) for all geographic numbers, including the leading '0' of the area code when dialed domestically. Internationally, the leading '0' is dropped, so the NSN becomes 10 digits: 23770 1234.

Local and International Call Instructions

For local callers within the 2377 area, it is possible to dial only the local number (without the area code) if the call is made within the same exchange. However, due to the widespread adoption of the full 10-digit dialing in Greece, it is recommended to always use the full national number. For callers from other parts of Greece, dial 23770 followed by the local number. For callers from abroad, dial the international access prefix (e.g., 00 from most countries), then 30, then 23770, and the local number. Mobile callers within Greece should also use the full national number.

Overlays and Numbering Considerations

As of the latest ITU-T E.164 updates, there are no overlay codes for the 2377 area. The code is exclusively geographic and is not portable to other geographic areas. Subscribers in this region may have access to VoIP and other non-geographic services, but the 2377 code remains tied to the physical location. When calling from abroad, be aware that some service providers may require the use of the country code and the area code without the leading '0'.