Area Code and Exchange (920) 521 in Wisconsin
Exchange Code 521 for Area Code 920 covers the city of Neenah, Winnebago County in the State of Wisconsin. It is centered at N 44º 11' 8.95", W 88º 27' 45.39". This Exchange Code was introduced on 13 October 1999 and is designated as being used for Landline telephones.
This Exchange covers telephone numbers ranging from (920) 521-0000 to (920) 521-9999.
Technical Information for Exchange (920) 521
NXX/Exchange Code: 521
Rate Center: NEENAH
Time Zone: CST
Exchange Status: Active
NXX Intro Date: 13 October 1999
CBSA Code: 36780
Number Pooling: Yes
Number Pooling in Exchange (920) 521
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 920-521 and the following thousand blocks are currently assigned to carriers.