Thousands-block number pooling
Allocating numbers to carriers in blocks of 1,000 (NPA-NXX-X) instead of full 10,000-number prefixes, so scarce numbering resources are used more efficiently. Pooled prefixes are shared among several carriers.
Allocating numbers to carriers in blocks of 1,000 (NPA-NXX-X) instead of full 10,000-number prefixes, so scarce numbering resources are used more efficiently. Pooled prefixes are shared among several carriers.