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Area Code and Exchange (715) 721 in Wisconsin

Exchange Code 721 for Area Code 715 covers the city of Colby, Clark County in the State of Wisconsin. It is centered at N 44º 54' 35.88", W 90º 18' 56.49". This Exchange Code was introduced on 16 November 2012 and is designated as being used for Landline telephones.

This Exchange covers telephone numbers ranging from (715) 721-0000 to (715) 721-9999.

Technical Information for Exchange (715) 721

NPA/Area Code: 715
NXX/Exchange Code: 721
City: Colby
County: Clark
State: Wisconsin
Rate Center: COLBY
OCN: 5489
Time Zone: CST
DST Observed:
Exchange Status: Active
NXX Use Type: Landline
NXX Intro Date: 16 November 2012
Latitude: 44.9099665
Longitude: -90.3156911
New NPA:
LATA: 350
FIPS: 55019
CBSA Code:
Number Pooling: Yes


Number Pooling in Exchange (715) 721

The initial set up of an Exchange was to have all 10,000 numbers (0000 - 9999) for a particular Rate Center allocated to the same local exhange carrier. With the advent of multiple carriers, allocating each one of them their own Exchange Code would be inefficient and soon use up the available number pools for a particular area. To counter this, some exchanges are split into blocks of 1,000 numbers, which can each be allocated to individual carriers. This cuts down on wasted numbers that aren't allocated as each carrier has a smaller pool available.

Number Pooling is activated in Exchange 715-721 and the following thousand blocks are currently assigned to carriers.