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Area Code and Exchange (425) 421 in Washington

Exchange Code 421 for Area Code 425 covers the city of Kirkland, King County in the State of Washington. It is centered at N 47º 40' 53.36", W 122º 12' 31.45". This Exchange Code was introduced on 30 November 1999 and is designated as being used for Landline telephones.

This Exchange covers telephone numbers ranging from (425) 421-0000 to (425) 421-9999.

In this Exchange Code there are 1 telephone numbers that our research shows belong to legitimate businesses.

Technical Information for Exchange (425) 421

NPA/Area Code: 425
NXX/Exchange Code: 421
City: Kirkland
County: King
State: Washington
Rate Center: KIRKLAND
OCN: 6121
Time Zone: PST
DST Observed:
Exchange Status: Active
NXX Use Type: Landline
NXX Intro Date: 30 November 1999
Latitude: 47.6814876
Longitude: -122.2087353
New NPA:
LATA: 674
FIPS: 53033
CBSA Code:
Number Pooling: Yes


Number Pooling in Exchange (425) 421

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 425-421 and the following thousand blocks are currently assigned to carriers.

Businesses and other Entities in Exchange (425) 421 1

Below are details of all of the legitimate businesses and other entities that we have identified within this Exchange Code.

(425) 421-3859


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