Area Code and Exchange (920) 504 in Wisconsin
Exchange Code 504 for Area Code 920 covers the city of Seymour, Eau Claire County in the State of Wisconsin. It is centered at N 44º 49' 35.86", W 91º 25' 52.57". This Exchange Code was introduced on 21 September 2005 and is designated as being used for Landline telephones.
This Exchange covers telephone numbers ranging from (920) 504-0000 to (920) 504-9999.
Technical Information for Exchange (920) 504
NXX/Exchange Code: 504
County: Eau Claire
Rate Center: SEYMOUR
Time Zone: CST
Exchange Status: Active
NXX Intro Date: 21 September 2005
CBSA Code: 20740
Number Pooling: Yes
Number Pooling in Exchange (920) 504
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 920-504 and the following thousand blocks are currently assigned to carriers.