Signal & Syntax · Numbers and formats
What Is a Numbering Plan?
A numbering plan is the national rulebook for phone numbers. The plan sets which ranges exist, each number's length and each range's use.A numbering plan is the national rulebook for phone numbers. The plan sets which ranges exist, each number's length and each range's use.A numbering plan is the national rulebook for phone numbers. The plan sets which ranges exist, each number's length and each range's use.
Also callednational numbering plan
Example
Numbering Plan in Practice
Each country's regulator publishes the plan. Ofcom runs the UK plan. NANPA administers the plan shared by the US, Canada and Caribbean countries. The plan assigns ranges to mobile, geographic, toll-free and other services. A number outside every allocated range cannot be dialed.Each country's regulator publishes the plan. Ofcom runs the UK plan. NANPA administers the plan shared by the US, Canada and Caribbean countries. The plan assigns ranges to mobile, geographic, toll-free and other services. A number outside every allocated range cannot be dialed.Each country's regulator publishes the plan. Ofcom runs the UK plan. NANPA administers the plan shared by the US, Canada and Caribbean countries. The plan assigns ranges to mobile, geographic, toll-free and other services. A number outside every allocated range cannot be dialed.
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Guide
E.164 Phone Number Format Explained
The parts of an international number and how to convert a list. Read the guide →Run the Checks on Your Own List
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