Area Code 911 – Mobile Network
The phone area code for Mobile Network is 911 (international format +421911). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 911
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Overview of Slovakia's +421 911 Mobile Prefix
The +421 911 prefix is a non-geographic mobile network code assigned within Slovakia's national numbering plan, as defined by the Telecommunication Regulatory Authority of the Slovak Republic (Úrad pre reguláciu elektronických komunikácií a poštových služieb). It is used exclusively for mobile services and does not correspond to any physical location or administrative region. Subscribers under this prefix are served by mobile network operators (MNOs) or mobile virtual network operators (MVNOs) that have been allocated number blocks starting with 911.
Number Format and Dialing Procedures
Slovak mobile numbers consist of a three-digit mobile network code (MNC) followed by a seven-digit subscriber number, resulting in a total national (significant) number length of 10 digits. When dialing from within Slovakia, callers must use the national trunk prefix 0 before the 911 prefix, resulting in the format 0911 XXX XXX. For example, a local caller would dial 0911 234 567. From abroad, callers must replace the trunk prefix with the Slovak country code +421, yielding the international format +421 911 XXX XXX. Thus, an international caller would dial +421 911 234 567.
Number Portability and Routing
As with all Slovak mobile numbers, number portability is fully implemented. This means that a subscriber who retains their number when switching operators may no longer be physically connected to the original network associated with the 911 prefix. Therefore, the prefix does not definitively indicate the current operator, and routing is handled by a centralized database that ensures calls are correctly directed regardless of the underlying network.
International SMS and Voice Services
For international SMS and voice calls, the +421 911 prefix functions like any other Slovak mobile number. International messaging to these numbers requires the full international format, including the country code. Voice calls are subject to standard international tariffs, which vary depending on the caller's home operator and any applicable roaming agreements. It is important for international callers to verify the correct number format to avoid misdialing.
Regulatory and Usage Considerations
The 911 prefix is not related to emergency services; in Slovakia, the universal emergency number is 112. The allocation of mobile prefixes is regulated to ensure efficient use of the national numbering resource. Businesses and individuals using numbers with the 911 prefix should be aware that these are standard mobile numbers, and there are no special restrictions or premium rate implications. However, as with all mobile numbers, users should exercise caution when receiving unsolicited calls or messages, as they may originate from telemarketing or fraudulent sources.