Area Code 77 – Opole
The phone area code for Opole is 77 (international format +4877). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 77
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Opole
Geographic Coverage and Administrative Jurisdiction
The +48 77 country calling code prefix is the National Destination Code (NDC) assigned to the Opole region in southwestern Poland. This geographic area code serves the city of Opole (the capital of Opole Voivodeship) and its surrounding counties, including Kędzierzyn-Koźle, Nysa, Brzeg, Kluczbork, Prudnik, Strzelce Opolskie, and Głubczyce. The area is part of the historic region of Upper Silesia, and the code is administered by the Polish Office of Electronic Communications (UKE).
Dialing Formats and Number Structure
When calling a landline in the Opole area from within Poland, subscribers must dial the trunk prefix '0' followed by the area code '77' and the subscriber's seven-digit local number. For example, a local number in Opole might be formatted as 0-77-XXX-XX-XX. However, from outside Poland, callers should use the international format: +48 77 XXX-XX-XX (or 0048 77 XXX-XX-XX from most European countries). The total number length for a geographic number in Poland is 9 digits, including the leading '7' of the area code but excluding the trunk prefix '0'.
Local and International Caller Instructions
For local callers within the Opole area, it is possible to dial only the seven-digit subscriber number when calling within the same local exchange area, though this practice is becoming less common with the proliferation of mobile and VoIP services. For callers from other regions of Poland, the full national format (0-77-XXX-XX-XX) is required. International callers must replace the trunk prefix '0' with the Polish country code '+48' and omit the leading '0' of the area code. Thus, a typical international dialing sequence would be: +48 77 XXX-XX-XX.
Overlay and Numbering Plan Considerations
As of the latest UKE regulations, the Opole area code '77' does not have an overlay code. The numbering plan is closed, meaning that the area code is mandatory for all calls, even local ones, when dialing from mobile networks or from other fixed-line networks. The seven-digit subscriber numbers are allocated to various operators, including Orange Polska, T-Mobile Polska, and local alternative carriers. Number portability is available, allowing subscribers to retain their geographic number when changing operators, but the number remains associated with the Opole geographic region.
Practical Usage and Examples
For a business or resident in Opole, the public number might be listed as +48 77 400 00 00. A caller from Warsaw would dial 0 77 400 00 00, while a caller from Germany would dial 0048 77 400 00 00. It is important to note that calls to geographic numbers are typically charged at standard domestic rates when dialed from within Poland, and international rates apply from abroad. VoIP users should ensure they are dialing the correct international prefix for their location.