Area Code 23 – Ciechanów
The phone area code for Ciechanów is 23 (international format +4823). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 23
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Ciechanów
Geographic Overview
The +48 23 area code is a geographic National Destination Code (NDC) assigned to the Ciechanów area in Poland. Ciechanów is a city in the Masovian Voivodeship, located approximately 100 kilometers north of Warsaw. The code covers the city itself and its surrounding districts, including towns such as Glinojeck, Sońsk, and Opinogóra Górna. As part of the Polish numbering plan, this code is used for fixed-line (PSTN) services, and calls to numbers with this prefix are routed based on their physical location.
Dialing Formats
For callers within Poland, the area code is dialed with a leading '0' (trunk prefix), followed by the subscriber number. For example, a local number such as 123 45 67 would be dialed as 023 123 45 67 from other parts of the country. For international callers, the Polish country code (+48) is used, and the trunk prefix '0' is omitted. Thus, the same number would be dialed as +48 23 123 45 67. Subscriber numbers in this area typically consist of 7 digits, making the total length of a national significant number (NSN) 9 digits, including the area code.
Geographic Significance and Overlays
As a geographic code, 23 is tied to the Ciechanów region and is not portable outside this area. There are no overlay codes in this region, meaning that the 23 code is the sole area code for the region. This simplifies dialing, as there is no need for 10-digit dialing within the area. Local calls within the same area code can be made using only the 7-digit subscriber number, without dialing the area code.
Caller Instructions
For callers within the Ciechanów area, local calls can be made by dialing the 7-digit subscriber number directly. For callers outside the area but within Poland, dial the trunk prefix '0', then the area code '23', followed by the subscriber number. For international callers, always use the full international format: +48 23 followed by the subscriber number. It is important to note that the leading '0' is only used for domestic calls and must be omitted when dialing from abroad.
This area code is managed by the Polish Office of Electronic Communications (UKE), and all numbers with this prefix are allocated to fixed-line operators, including Orange Polska, Play (formerly Netia), and other local providers. As with all geographic codes, the numbers are associated with a specific physical location, which is important for emergency services and location-based services.