Area Code 3740 – Hertz, Chernivtsi

Geographic Context and Administrative Coverage

The +380 3740 numbering block is a geographic allocation within the Ukrainian National Numbering Plan, specifically assigned to the city of Chernivtsi and its surrounding administrative district in southwestern Ukraine. Chernivtsi serves as the administrative center of Chernivtsi Oblast, a region bordering Romania and Moldova. This prefix is used for fixed-line PSTN (Public Switched Telephone Network) services, connecting subscribers within the Chernivtsi urban area and nearby settlements. The geographic nature of the code means that the number is tied to a physical location, and calls are routed based on the subscriber's registered address.

Dialing Formats and Procedures

For domestic callers within Ukraine, the national significant number (NSN) for Chernivtsi numbers begins with the trunk prefix '0', followed by the area code '3740' and the subscriber number, which typically consists of 5 to 6 digits. Therefore, a complete domestic dialing sequence would be: 0 3740 XX XX XX. For example, a local Chernivtsi number might be dialed as 0 3740 12345 (if the subscriber number is 5 digits) or 0 3740 123456 (if 6 digits). It is important to note that when dialing from a mobile phone within Ukraine, the same format applies: you must include the leading '0'.

For international callers, the country code for Ukraine is +380, and the trunk prefix '0' is omitted. Thus, the international format becomes +380 3740 XX XX XX. For instance, a caller from the United States would dial 011 380 3740 12345 (or +380 3740 12345 from a mobile). The plus sign (+) represents the international access code, which varies by country (e.g., 011 from North America, 00 from most European countries).

Overlay and Numbering Plan Considerations

As of the latest ITU-T E.164 guidelines and the Ukrainian National Commission for State Regulation of Communications and Informatization, the 3740 code is part of the Chernivtsi geographic numbering area. No overlay codes have been implemented for this region, meaning that the area code remains unique for fixed-line services. However, subscribers may have the option to port their numbers to alternative fixed-line operators, but the geographic significance is retained. When dialing from abroad, callers must always include the +380 country code and the area code without the leading '0'.

Caller Instructions

For local callers within Chernivtsi, it is possible to dial only the subscriber number if the call is within the same local exchange area, but this practice is becoming less common due to multi-operator environments. To ensure successful routing, it is recommended to always use the full national format (0 3740...). For international callers, ensure that you have the correct country code and area code, and be mindful of time zone differences (Ukraine is UTC+2, UTC+3 during daylight saving).