Area Code 2423 – Kala Nera

Geographic Overview

The Greek area code 2423 is a Geographic National Destination Code (NDC) assigned to the southeastern portion of the Magnesia regional unit, within the administrative region of Thessaly. This numbering area covers the coastal and mountainous zones around the Pagasetic Gulf, including the town of Kala Nera (Καλά Νερά) and its surrounding settlements. Kala Nera, a popular seaside resort, lies approximately 20 kilometers southeast of Volos, the capital of Magnesia. The code also serves nearby communities such as Argalasti, Milies, and the broader South Pelion area, which are known for their beaches, traditional villages, and tourism infrastructure.

Dialing Formats

Within Greece, callers must dial the trunk prefix 0 followed by the area code and the subscriber number. For the 2423 area, the national format is:

• National (domestic) dialing: 0 2423 XXXX XXX (where X represents the 6- or 7-digit subscriber number).
• International dialing: +30 2423 XXXX XXX (omit the leading 0).

For example, a local number in Kala Nera might be 2423 51234. To call it from Athens, you would dial 0 2423 51234. From abroad, you would dial +30 2423 51234.

Geographic Coverage and Administration

The 2423 code is administered by the Hellenic Telecommunications and Post Commission (EETT) and is allocated to fixed-line services, including PSTN and VoIP that are registered to a physical address within the exchange area. It is not a mobile prefix; mobile numbers in Greece always begin with 69x. The area is part of the Volos numbering plan, which historically used the 2421 code for central Volos. The 2423 code was introduced to accommodate the growing demand for telephony services in the southern and eastern parts of Magnesia, including the Pelion peninsula. Overlays and number portability allow subscribers to retain their numbers when switching providers, but the geographic association remains tied to the original exchange location.

Caller Instructions

For callers within Greece: Always include the trunk prefix 0 before the area code when dialing from a different fixed-line zone or from a mobile phone. For example, to call a business in Kala Nera from Thessaloniki, dial 0 2423 7XXXXX.

For international callers: Replace the leading 0 with the Greek country code +30. Thus, a caller from the United States would dial 011 30 2423 7XXXXX, while a caller from the UK would dial 00 30 2423 7XXXXX.

When dialing locally within the same 2423 area, the area code may be omitted, but it is always safe to include it. For VoIP users, the same rules apply, but ensure that your service provider supports geographic number routing.