Area Code 172 – Mobile Network
The phone area code for Mobile Network is 172 (international format +49172). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 172
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Overview of Germany’s +49 172 Mobile Prefix
The +49 172 prefix is a non-geographic mobile code assigned to Germany’s cellular network. It is part of the national numbering plan administered by the Bundesnetzagentur (Federal Network Agency) and is used exclusively for mobile services, not tied to any specific city or region. The prefix 172 is operated by Telekom Deutschland GmbH (Deutsche Telekom), one of the country’s largest mobile network operators (MNOs). Subscribers under this prefix are typically postpaid and prepaid customers of Telekom’s MagentaMobil tariffs, though mobile number portability (MNP) means that a number starting with 172 may now be hosted on another operator’s network.
Format and Dialing Rules
German mobile numbers are ten digits long when dialed nationally, including the leading trunk prefix ‘0’. Thus, a typical 172 number appears as 0172 1234567 within Germany. Internationally, the leading ‘0’ is dropped and replaced by the country code +49, yielding +49 172 1234567. When calling from abroad, you must use the international format: dial the international access code (e.g., 011 from the US, 00 from most European countries), then 49, followed by the mobile number without the leading zero. For example, a US caller would dial 011 49 172 1234567.
Number Portability and Routing
Since 2002, German mobile users can port their numbers between operators. Consequently, a number beginning with 172 does not guarantee that the subscriber is still on Telekom’s network. Routing is determined by a central database, and calls or SMS are delivered regardless of the current network. This is crucial for businesses and individuals who rely on these numbers for customer contact, as the prefix is no longer a reliable indicator of the operator.
Usage and Services
Numbers under 172 support all standard mobile services, including voice calls, SMS, MMS, and mobile data (4G/5G). They are also used for machine-to-machine (M2M) communications and IoT applications. Because these are mobile numbers, they are not subject to geographic tariffs; instead, calls are billed according to mobile rates, which may differ between on-net and off-net calls. For businesses, having a 172 number can be advantageous due to Telekom’s extensive network coverage and reputation for reliability.
Considerations for Callers
When calling a 172 number from a landline or another mobile, you should be aware that charges may apply depending on your tariff. Within Germany, calls to mobile numbers are typically not included in flat-rate landline packages. From abroad, international roaming rates may apply to the person you are calling, so it is advisable to use messaging apps or VoIP services when possible. Always verify the complete number, as German mobile numbers are not grouped by region and can be dialed from anywhere in the world using the same format.