numbering plan
nounUK /ˈnʌmbərɪŋ plæn/
US /ˈnʌmbərɪŋ plæn/
A numbering plan is a set of rules for giving phone numbers to people and places.
The telephone company follows a numbering plan to decide which numbers go to which towns.
OTHER MEANINGS
2. A structured scheme for assigning identifying numbers to items such as documents, rooms, or products.
The library uses a numbering plan to organize its shelves.
3. In computing, a system that defines how addresses or identifiers are numbered within a network.
The network engineer updated the IP numbering plan for the new office.
4. A formal arrangement for numbering seats, tickets, or entries in an event or record system.
The stadium's numbering plan makes it easy to find your seat.