Area Code 57 – Kharkiv
The phone area code for Kharkiv is 57 (international format +38057). Browse local exchange codes (NXX) and carrier assignments below.
📍 Geographic Location of Kharkiv
Geographic Overview
The +380 57 area code is the national destination code (NDC) for the city of Kharkiv and the surrounding Kharkiv Oblast in northeastern Ukraine. As a geographic allocation under the ITU-T E.164 numbering plan, this code routes calls to fixed-line PSTN and VoIP subscribers registered within the administrative boundaries of the Kharkiv region. Kharkiv serves as the administrative center of the oblast and is the second-largest city in Ukraine, with a population exceeding 1.4 million. The coverage area includes the city proper, its suburbs, and nearby towns such as Derhachi, Liubotyn, and Merefa, all of which share the same numbering pool.
Dialing Formats
For domestic callers within Ukraine, the trunk prefix '0' is used before the area code and subscriber number. The national significant number (NSN) for Kharkiv numbers is nine digits, comprising the area code '57' followed by a seven-digit local subscriber number. The complete domestic dialing format is: 0 57 XXX XX XX.
International callers must use Ukraine's country calling code +380, followed by the area code without the leading '0'. The international format is: +380 57 XXX XX XX. For example, a typical Kharkiv landline number might be dialed as +380 57 701 2345 from abroad.
Numbering and Overlays
Kharkiv's numbering plan does not currently employ an overlay code; the 57 NDC is exclusively assigned to the geographic region. Subscriber numbers are allocated in blocks to local fixed-line operators, including Ukrtelecom, Kyivstar (fixed-line services), and alternative VoIP providers. Number portability is available within Ukraine, allowing subscribers to retain their numbers when switching operators, although geographic portability is limited to the same area code.
Caller Instructions
For local callers within Kharkiv, seven-digit dialing is generally sufficient for calls between landlines in the same area code. However, to avoid confusion and ensure proper routing, it is recommended to use the full domestic format, especially when calling from mobile phones. Mobile callers within Ukraine must always include the trunk prefix and area code: 0 57 XXX XX XX. Foreign callers should replace the trunk prefix '0' with the country code +380, omitting the leading zero of the area code.
Practical Example
If you are calling a Kharkiv business from the United States, you would dial: 011 380 57 XXX XX XX. From a UK mobile, you would dial: 00 380 57 XXX XX XX. Always verify the subscriber number length, as some older numbers may have fewer digits, but the standard is seven digits after the area code.