Area Code and Exchange (920) 503 in Wisconsin
Exchange Code 503 for Area Code 920 covers the city of Pulaski, Brown County in the State of Wisconsin. It is centered at N 44º 40' 19.98", W 88º 14' 33.37". This Exchange Code was introduced on 11 May 2009 and is designated as being used for Landline telephones.
This Exchange covers telephone numbers ranging from (920) 503-0000 to (920) 503-9999.
In this Exchange Code there are 1 telephone numbers that have been the subject of complaints to the FCC.
Technical Information for Exchange (920) 503
NXX/Exchange Code: 503
Rate Center: PULASKI
Time Zone: CST
Exchange Status: Active
NXX Intro Date: 11 May 2009
CBSA Code: 24580
Number Pooling: Yes
Number Pooling in Exchange (920) 503
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 920-503 and the following thousand blocks are currently assigned to carriers.