Area Code and Exchange (608) 851 in Wisconsin
Exchange Code 851 for Area Code 608 covers the city of Monroe, Green County in the State of Wisconsin. It is centered at N 42º 36' 4.03", W 89º 38' 18.43". This Exchange Code was introduced on 3 December 2002 and is designated as being used for Wireless telephones.
This Exchange covers telephone numbers ranging from (608) 851-0000 to (608) 851-9999.
Technical Information for Exchange (608) 851
NXX/Exchange Code: 851
Rate Center: MONROE
Time Zone: CST
Exchange Status: Active
NXX Intro Date: 3 December 2002
Number Pooling: Yes
Number Pooling in Exchange (608) 851
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 608-851 and the following thousand blocks are currently assigned to carriers.