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Area Code and Exchange (608) 401 in Wisconsin

Exchange Code 401 for Area Code 608 covers the city of Mazomanie, Dane County in the State of Wisconsin. It is centered at N 43º 10' 35.97", W 89º 47' 41.44". This Exchange Code was introduced on 13 December 2004 and is designated as being used for Landline telephones.

This Exchange covers telephone numbers ranging from (608) 401-0000 to (608) 401-9999.

Technical Information for Exchange (608) 401

NPA/Area Code: 608
NXX/Exchange Code: 401
City: Mazomanie
County: Dane
State: Wisconsin
Rate Center: MAZOMANIE
OCN: 682A
Time Zone: CST
DST Observed:
Exchange Status: Active
NXX Use Type: Landline
NXX Intro Date: 13 December 2004
Latitude: 43.1766586
Longitude: -89.7948452
New NPA:
LATA: 354
FIPS: 55025
CBSA Code: 31540
Number Pooling: Yes
CBSA Name: Madison, WI


Number Pooling in Exchange (608) 401

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 608-401 and the following thousand blocks are currently assigned to carriers.