Area Code 37 – Plzeň Region
The phone area code for Plzeň Region is 37 (international format +42037). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 37
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Plzeň Region
Geographic Context and Coverage
The +420 37 area code is a geographic National Destination Code (NDC) assigned to the Plzeň Region (Plzeňský kraj) in the western part of Czechia. This code serves the regional capital, Plzeň (Pilsen), and its surrounding districts, including Rokycany, Tachov, Domažlice, and Klatovy. The area is known for its industrial heritage, including the Škoda transportation company, and is a major cultural and economic hub in West Bohemia.
Dialing Formats and Number Structure
In the international format, numbers are written as +420 37X XXX XXX, where the complete national significant number is nine digits, always beginning with 37. For example, a typical Plzeň landline might be +420 377 123 456. When dialing locally within Czechia, the national trunk prefix '0' is not used; callers simply dial 37X XXX XXX. Internationally, callers replace the leading '0' (if present in older notation) with the +420 country code. It is important to note that Czechia uses closed numbering plan, so no trunk prefix is required for domestic calls.
Caller Instructions
- Local callers (within the 37 area): Dial the eight-digit subscriber number directly (e.g., 377 123 456).
- Domestic callers from other areas: Dial the full nine-digit number starting with 37 (e.g., 377 123 456).
- International callers: Dial +420 37X XXX XXX (e.g., +420 377 123 456).
Overlays and Numbering Administration
The 37 code is a geographic NDC, and the Czech Telecommunication Office (ČTÚ) administers numbering resources. Currently, there are no overlay codes for the Plzeň region; the 37 code remains the sole geographic code for this area. However, number portability allows subscribers to retain their numbers when changing operators, even if the service is provided via VoIP or mobile networks, which may result in a number no longer being strictly tied to a physical location.
Usage and Trends
While traditional PSTN lines are declining, the 37 code is still actively used by businesses, government offices, and residents. Many organizations in Plzeň use these numbers for customer service and administrative lines. VoIP providers also offer geographic numbers with the 37 code, enabling businesses to maintain a local presence regardless of their physical location. For callers, standard national and international tariffs apply, depending on the operator and the caller's plan.