Area Code 57 – Mobile Network
The phone area code for Mobile Network is 57 (international format +4857). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 57
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Overview of Poland's +48 57 Mobile Prefix
The +48 57 prefix is a non-geographic mobile numbering range assigned within Poland's national numbering plan. Unlike geographic area codes (such as 22 for Warsaw or 12 for Kraków), the 57 prefix is not tied to a specific physical location or administrative region. It is allocated to mobile network operators (MNOs) and mobile virtual network operators (MVNOs) operating under the regulatory oversight of the Office of Electronic Communications (UKE). Subscribers assigned numbers beginning with 57 can be located anywhere in the country, and the prefix does not indicate the caller's or callee's current whereabouts.
Dialing Format and Number Structure
Polish mobile numbers, including those with the 57 prefix, follow the E.164 international standard. The full international format is +48 57 XXX XX XX, where +48 is the country calling code for Poland, 57 is the national destination code (NDC) for mobile services, and the remaining seven digits (XXX XX XX) constitute the subscriber number. When dialing domestically, callers must use the national trunk prefix '0' before the NDC, resulting in the format 0 57 XXX XX XX. For example, a complete number might appear as +48 57 123 45 67 in international notation, or 0 57 123 45 67 when dialed from within Poland.
Calling from Abroad and Within Poland
International callers should dial +48 57 XXX XX XX, omitting any leading '0'. From Polish landlines or other mobile networks, dial 0 57 XXX XX XX. It is important to note that the 57 prefix is exclusively used for mobile services; it is not assigned to fixed-line or VoIP geographic services. Therefore, calls to 57 numbers are routed to mobile networks and are typically charged at mobile rates, which may vary depending on the caller's operator and tariff plan.
Mobile Number Portability and Operator Identification
Poland implemented Mobile Number Portability (MNP), allowing subscribers to retain their numbers when switching operators. Consequently, the 57 prefix does not permanently identify a specific carrier; it may be ported to another MNO or MVNO. For accurate routing and billing, telecommunication databases must be updated in real time. This also means that consumers cannot rely solely on the prefix to determine the operator, and regulatory measures ensure that ported numbers are correctly routed.
Usage and Availability
Numbers with the 57 prefix are widely used for personal mobile subscriptions, business mobile lines, and IoT (Internet of Things) applications that require voice and data services. They support standard mobile features such as SMS, MMS, and high-speed data. As with all Polish mobile numbers, the 57 range is subject to UKE's numbering plan management, ensuring efficient allocation and future expansion. When contacting Polish mobile users, always verify the complete number to avoid misdialing, especially when calling from abroad.