Overview#National Destination Code (NDC), commonly referred to as an International City Code or Number Plan Area or Area Code or significant leading digits of National Significant Number, is specified in ITU-T E.164.
National Destination Code identifies the Number Plan Area that is to be used.
National Destination Code optional code field which determined by each specific Telephone Numbering Plan.
More Information#There might be more information for this subject on one of the following:
- Easily Recognizable Code
- International Direct Dialling
- International Telephone Number
- Mobile Global Title
- Mobile Station International Subscriber Directory Number
- National Significant Number
- North American Numbering Plan
- Number Plan Area
- Telephone Numbering Plan