Area Code 3633 – Radivilov, Rivne

Geographic Overview

The +380 3633 prefix is a geographic National Destination Code (NDC) assigned to the fixed-line telephone network serving the city of Radivilov and its surrounding administrative district in the Rivne Oblast of western Ukraine. Radivilov is a small but historically significant settlement located approximately 60 kilometers south of the regional capital, Rivne, near the border with Ternopil Oblast. The numbering area covers the urban zone of Radivilov and the adjacent rural communities that fall under the local telephone exchange.

Dialing Formats

Within Ukraine, callers must use the national trunk prefix 0 before the area code and subscriber number. The complete national format is:

• 0 3633 XX-XX-XX (for calls placed from other Ukrainian fixed or mobile networks)

For international callers, the country code +380 replaces the trunk prefix, and the area code is used without the leading zero:

• +380 3633 XX-XX-XX (when dialing from abroad)

Local calls within the Radivilov exchange area may be possible using only the six-digit subscriber number, depending on the operator's configuration, but it is recommended to use the full national format for consistency.

Geographic Allocation and Numbering

The prefix 3633 is part of the Ukrainian numbering plan administered by the Ukrainian State Centre of Radio Frequencies (UCRF) under the National Commission for State Regulation of Communications and Informatization. As a geographic code, it is tied to a specific physical location, and the tariff for calls to this number is typically based on the distance from the caller's location, although many modern operators offer flat-rate national calling plans.

Caller Instructions

For local callers (within Ukraine): Dial 0 3633 followed by the six-digit subscriber number. If you are calling from a mobile phone, the same format applies; the call will be routed as a national fixed-line call.

For international callers: Dial your country's international access code (e.g., 00 from most European countries, 011 from North America), then 380 3633 and the six-digit subscriber number. Do not include the leading zero of the area code.

Overlay and Future Considerations

As of the latest available data, there are no overlay codes or additional NDCs assigned to the Radivilov area. The subscriber number length is six digits, and the total number of digits after the country code is nine (including the area code). This structure is consistent with the ITU-T E.164 recommendation for the Ukrainian PSTN.

Businesses and residents in Radivilov should ensure that their contact details are published in the international format (+380 3633 ...) to facilitate seamless communication with partners and clients abroad.