Area Code 171 – Mobile Network
The phone area code for Mobile Network is 171 (international format +49171). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 171
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Overview of Germany’s +49 171 Mobile Prefix
The +49 171 prefix is a non-geographic mobile code assigned to Germany’s mobile networks. Unlike geographic area codes, which are tied to specific cities or regions, 171 numbers are location-independent and belong to the national mobile numbering plan. They are used exclusively for mobile services, including voice, SMS, and data, and are portable across operators within Germany.
Technical Specifications
German mobile numbers using the 171 prefix follow the E.164 international format: +49 171 XXXXXXX. The full national number consists of the mobile prefix (0171) followed by a seven-digit subscriber number, resulting in a total length of 11 digits when dialed locally (including the leading zero) and 12 digits internationally (including the country code). The prefix 171 is allocated to mobile network operators (MNOs) and mobile virtual network operators (MVNOs). Historically, it was associated with T-Mobile (now Telekom), but due to mobile number portability (MNP), a number starting with 171 may currently be serviced by any German operator.
Dialing Instructions
When calling a German mobile number from abroad, you must replace the leading zero with the German country code (+49). For example, to call a number that is locally written as 0171 2345678, you would dial +49 171 2345678 from outside Germany. From within Germany, you simply dial 0171 2345678, regardless of your location. The prefix is non-geographic, so there are no regional restrictions or special tariffs for calling a 171 number from a fixed line or another mobile.
Regulatory and Commercial Aspects
The German Federal Network Agency (Bundesnetzagentur) oversees the allocation of numbering resources. The 171 prefix is part of the national mobile numbering range, which is distinct from geographic codes. Mobile numbers are subject to strict regulations regarding caller identification and emergency services. For businesses, 171 numbers are often used for customer contact, as they are widely recognized as mobile numbers and can be used for SMS marketing (subject to consent) and mobile services. However, because they are mobile numbers, they may incur higher termination rates than geographic numbers, which is a consideration for enterprises with high inbound call volumes.
For international callers, it is important to note that German mobile numbers are reachable from virtually all countries, but international roaming charges may apply if the called party is outside Germany. Additionally, some premium or short-code services may not be accessible from abroad, but standard 171 numbers are fully functional internationally.