Area Code 42 – Mobile Network
The phone area code for Mobile Network is 42 (international format +4542). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 42
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Overview of Danish Mobile Prefix 42
The Danish telephone numbering plan, governed by the ITU-T E.164 standard and administered by the Danish Energy Agency, assigns mobile numbers with the country code +45 and an eight-digit subscriber number. The prefix 42 is a non-geographic mobile network prefix, meaning it is not tied to any specific region or city within Denmark. Instead, it is allocated to mobile network operators (MNOs) and mobile virtual network operators (MVNOs) that provide nationwide cellular services.
Format and Dialing
Danish mobile numbers, including those starting with 42, are always eight digits long. The complete international format is +45 42XX XXXX. When dialing from within Denmark, callers simply dial the eight-digit number without any trunk prefix, as Denmark does not use a national trunk code (like '0' in many countries). For example, a local caller would dial 42 34 56 78, while an international caller would dial +45 42 34 56 78.
Number Portability and Routing
Denmark has implemented full mobile number portability (MNP), allowing subscribers to retain their 42-prefixed numbers when switching between operators. As a result, the prefix 42 does not necessarily indicate the current network operator; it only reflects the original allocation. Routing of calls and SMS messages to 42 numbers is handled via the national signaling network, which queries a central database to determine the current network of the subscriber.
Usage and Services
Numbers with the 42 prefix are used for standard mobile voice calls, SMS, MMS, and mobile data services. They are also used for machine-to-machine (M2M) communications and IoT devices. Because these numbers are non-geographic, they are suitable for businesses that require a nationwide presence without regional constraints.
Caller Instructions
For callers within Denmark, simply dial the eight-digit number. For callers from abroad, always include the Danish country code +45 and omit any leading zeros (there are none). Ensure that you have international dialing access from your country. When calling from a mobile phone, you may need to use the plus sign (+) before the country code, which is the international access code recognized by most mobile networks.
Regulatory and Cost Considerations
Calls to Danish mobile numbers are typically charged at higher rates than landline calls, depending on your carrier and plan. Within Denmark, calls to 42 numbers are considered mobile-to-mobile or fixed-to-mobile calls, and tariffs vary accordingly. For international callers, rates are determined by the roaming or international calling agreements of your service provider. It is advisable to check with your operator for specific charges.