Area Code 5458 – Trostyanets, Sumy

Overview of Area Code 5458

Area code 5458 is a geographic destination code within the Ukrainian national numbering plan, assigned to the town of Trostyanets and its surrounding rural districts in the Sumy Oblast (province) of northeastern Ukraine. The code is part of the national numbering zone 54, which serves the Sumy region. Geographically, Trostyanets is located approximately 55 kilometers southeast of the regional capital, Sumy, and is known for its pharmaceutical industry and historical architecture.

Dialing Formats

For callers within Ukraine, the national trunk prefix 0 is used before the area code. The full national subscriber number for a landline in Trostyanets is 0 5458 XX-XX-XX, where XX-XX-XX represents the six-digit local subscriber number. For example, a local number might be 0 5458 123456.

For international callers, the Ukrainian country code +380 replaces the trunk prefix. Thus, the same number would be dialed as +380 5458 123456. When dialing from abroad, the leading zero of the area code is omitted.

Geographic Coverage and Administration

The 5458 code covers the administrative territory of the Trostyanets Raion (district), which includes the city of Trostyanets and several adjacent villages. The code is administered by the Ukrainian State Service of Special Communication and Information Protection, in coordination with the national telecommunications operator, Ukrtelecom, which historically provided fixed-line services in the area.

Local and International Calling Instructions

• Local callers (within Trostyanets): If you are calling a number within the same area code, you may dial the six-digit subscriber number directly without the area code, depending on your operator's local dialing rules. However, for clarity and to avoid errors, it is recommended to use the full national format.
• National long-distance callers (outside 5458): Dial 0 5458 followed by the six-digit subscriber number.
• International callers: Dial your country's international access code (e.g., 00 from most European countries, 011 from the US/Canada), then 380 5458 and the six-digit subscriber number. For example, from the US, you would dial 011 380 5458 123456.

Overlay and Numbering Considerations

As of the latest updates, there is no overlay code for the 5458 area. The numbering plan for Ukraine is closed, meaning that all national numbers, including geographic ones, have a fixed length of nine digits after the trunk prefix (0). For Trostyanets, the number structure is 0 (5458) XX XX XX, totaling nine digits. This format ensures compatibility with the national numbering plan and supports the future introduction of VoIP and IP-based services.

When dialing from a mobile phone within Ukraine, the same national format applies, and callers are advised to include the area code even when calling from the same region to ensure proper routing.