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Area Code and Exchange (534) 331 in Wisconsin

Exchange Code 331 for Area Code 534 covers the city of Iron River, Bayfield County in the State of Wisconsin. It is centered at N 46º 33' 51.79", W 91º 24' 29.68". This Exchange Code was introduced on 25 October 2017 and is designated as being used for Landline telephones.

This Exchange covers telephone numbers ranging from (534) 331-0000 to (534) 331-9999.

Technical Information for Exchange (534) 331

NPA/Area Code: 534
NXX/Exchange Code: 331
City: Iron River
County: Bayfield
State: Wisconsin
Rate Center: IRON RIVER
OCN: 7575
Time Zone: CST
DST Observed:
Exchange Status: Active
NXX Use Type: Landline
NXX Intro Date: 25 October 2017
Latitude: 46.5643859
Longitude: -91.4082454
New NPA:
LATA: 352
FIPS: 55007
CBSA Code:
Number Pooling: Yes


Number Pooling in Exchange (534) 331

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 534-331 and the following thousand blocks are currently assigned to carriers.