Area Code 5753 – Valki, Kharkiv

Geographic Overview

The +380 5753 prefix is a geographic National Destination Code (NDC) assigned to the fixed-line telephone network serving Valki, a town in the Bohodukhiv Raion of Kharkiv Oblast, Ukraine. This code is part of the national numbering plan administered by the Ukrainian State Centre of Radio Frequencies (UCRF) under the framework of ITU-T E.164. The geographic area covered by this prefix includes Valki and its surrounding rural settlements, which historically functioned as a district center. The code is used for traditional PSTN (Public Switched Telephone Network) services, although some operators may route calls over VoIP backbones for long-distance transport.

Dialing Formats

For callers within Ukraine, the national trunk prefix '0' is used before the area code and subscriber number. The full national significant number (NSN) is 10 digits, formatted as: 0 5753 XX-XX-XX. For example, a local Valki number might be dialed as 0 5753 4-56-78 from other parts of Ukraine.

International callers must use Ukraine's country calling code +380, followed by the area code without the leading '0'. The international format is: +380 5753 XX-XX-XX. For instance, to call the same number from abroad, you would dial +380 5753 4-56-78.

Local and Regional Calling

Within the Valki local calling area, subscribers may be able to make local calls using only the subscriber number (7 digits) if their operator supports local dialing. However, for calls from other regions of Ukraine, the full national format with the trunk prefix is required. The Kharkiv regional network uses a closed numbering plan, meaning that all calls within the oblast, including those to Valki, require the area code to be dialed.

Overlay and Numbering Changes

As of the latest available data, no overlay code has been introduced for the Valki area. The 5753 prefix remains the sole geographic code for the town. However, subscribers should be aware that number portability is available in Ukraine for fixed-line services, allowing users to retain their numbers when changing operators within the same geographic area.

Caller Instructions

For local callers within Valki: if you are calling a number within the same exchange, you may dial only the subscriber number. For all other calls, use the full national format. For foreign callers, always use the international format +380 5753 followed by the subscriber number. Ensure you have international dialing access from your country.