Area Code 63 – Mobile Network
The phone area code for Mobile Network is 63 (international format +3163). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 63
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Overview of the +31 63 Prefix
The +31 63 prefix is a non-geographic mobile network code assigned within the Netherlands' national numbering plan. Unlike geographic area codes (e.g., 020 for Amsterdam, 010 for Rotterdam), the 63 prefix does not correspond to a fixed location. Instead, it is allocated to mobile network operators (MNOs) and mobile virtual network operators (MVNOs) serving Dutch subscribers. This means that a number starting with +31 63 can belong to any mobile user across the country, regardless of their physical location.
Numbering and Formatting
Dutch mobile numbers consist of a national significant number (NSN) of 9 digits, beginning with the prefix '6'. The full international format for a number with the 63 prefix is: +31 63 XXXXXXX (where each X is a digit). When dialing domestically from within the Netherlands, you would use 063 XXXXXXX (the leading '0' is the trunk prefix). For example, a typical mobile number might be +31 63 1234567 or 063 1234567 locally. It is important to note that the 63 prefix is part of the broader '6' mobile range, which includes other prefixes like 61, 62, 64, 65, etc., all used for mobile services.
Technical and Regulatory Aspects
The 63 prefix is regulated by the Authority for Consumers and Markets (ACM), which oversees the Dutch telecom market. Numbers with this prefix are portable: subscribers can switch operators while retaining their number, a process known as mobile number portability (MNP). This means that the prefix alone does not identify the current operator; it only indicates that the number was originally assigned within the 63 range. For routing purposes, international calls to +31 63 numbers are directed to the Dutch mobile network, and the call is then routed to the subscriber's current operator based on a central number portability database.
From a caller's perspective, dialing a +31 63 number from abroad requires using the international access code of the originating country (e.g., 011 from the US, 00 from most European countries), followed by 31 (the Netherlands' country code), then 63 and the subscriber number. For SMS and MMS, the same international format is used. It is also worth noting that some VoIP services may use the 63 prefix, but the majority are traditional mobile connections.
Practical Guidance for Callers
When calling a Dutch mobile number with the 63 prefix from outside the Netherlands, always use the full international format: +31 63 XXXXXXX. Do not include the leading '0' that is used for domestic calls. For example, if the local number is 063 1234567, the international format is +31 63 1234567. This ensures proper routing through international telephony networks. For domestic callers within the Netherlands, simply dial 063 1234567. The cost of calling a 63 number depends on your phone plan; international rates may apply when calling from abroad, while domestic calls are typically included in national mobile bundles.