Area Code 4637 – Priluki, Chernihiv

Geographic Overview

The +380 4637 prefix is a geographic National Destination Code (NDC) assigned to the city of Pryluky and its surrounding district in Chernihiv Oblast, northern Ukraine. Pryluky is a historic city situated on the Udai River, approximately 130 kilometers southeast of Chernihiv and 150 kilometers northeast of Kyiv. The numbering area covers the city itself and the adjacent rural settlements that fall within the Pryluky Raion. As a geographic code, it routes calls to fixed-line PSTN subscribers within this specific administrative territory.

Dialing Formats

Within Ukraine, callers must dial the national trunk prefix 0 followed by the area code and the subscriber number. The complete national format is 0 4637 XX XX XX, where the subscriber number consists of seven digits (the area code plus a five-digit local number). For example, a local Pryluky number might be formatted as 0 4637 2 34 56. When calling from abroad, the international access code (00 or +) is used, followed by Ukraine's country code 380, the area code 4637 (without the leading zero), and the subscriber number: +380 4637 2 34 56.

Caller Instructions

• Local callers (within Pryluky): If your telephone service provider supports local dialing, you may be able to dial only the five-digit subscriber number (e.g., 2 34 56). However, due to the widespread adoption of overlay and carrier preselect, it is safer to dial the full national number 0 4637 2 34 56.
• National callers (from other Ukrainian cities): Dial 0 4637 followed by the subscriber number. For instance, from Kyiv you would dial 0 4637 2 34 56.
• International callers: Dial your country's exit code (e.g., 011 from North America, 00 from most European countries), then 380 4637 and the subscriber number. Example from the US: 011 380 4637 2 34 56.

Regulatory and Technical Notes

The Ukrainian numbering plan is administered by the Ukrainian State Centre of Radio Frequencies (UCRF) under the National Commission for State Regulation of Communications and Informatization (NKRZI). Geographic codes like 4637 are allocated to fixed-line operators, primarily Ukrtelecom and alternative local operators. Since 2009, Ukraine has implemented number portability for fixed lines within the same geographic area, meaning that a subscriber may retain their number even if they change service provider, but the geographic association remains tied to the physical location of the line. Overlays are not currently in effect for this area, so the 4637 code uniquely identifies the Pryluky region. When dialing from a mobile phone, the same national and international formats apply, but mobile operators may require the full national number (including the leading 0) to route the call correctly.