phone book, or the business directory.

Oklahoma

Oklahoma is a state in the South Central region of the United States, bordered by Kansas on the north, Missouri on the northeast, Arkansas on the east, Texas on the south, New Mexico on the west, and Colorado on the northwest. It is the 20th-most extensive and the 28th-most populous of the fifty United States.

The state of Oklahoma has a population of 3,665,548, and is formerly abbreviated as OK. Oklahoma has 1,432,405 households in the state, with an average of 2.47 people living in each of them. Of the 3,665,548 people living in Oklahoma, 49.48% are male, 50.52% are female, 59.86% are married and 40.14% are single. 60.58% of existing homes are owned by inhabitants, with a median home cost of $96,130 in the state.

Air quality in Oklahoma is rated at 68.4/100, and water quality at 54/100. There are 177.7 physicians in Oklahoma per 100,000 of the population. Unemployment rates average 7.00% in the state and the sales tax rate is 8.00%.

Average income per household in Oklahoma is $42,465. 15.54% of households have income levels less than $15,000 per year. 18.98% of households have income levels between $50,000 and $75,000 annually, and 0.34% earn more than $500,000 per year.

Oklahoma Area Codes

Area code 405 serves the state of Oklahoma. This area code was assigned on January 1st, 1947. On January 1st, 1947 it went into service. 405 is a General Purpose Code. Dialing pattern for local calls within the same NPA (area code) is 7D.

Area code 539 serves the state of Oklahoma. This area code was assigned on January 4th, 2010. On April 1st, 2011 it went into service. 539 is a General Purpose Code. 539 service area does overlap with 918 area codes. Dialing pattern for local calls within the same NPA (area code) is 10D.

Area code 580 serves the state of Oklahoma. This area code was assigned on September 11th, 1997. On November 1st, 1997 it went into service. 580 is a General Purpose Code. Dialing pattern for local calls within the same NPA (area code) is 7D.

Area code 918 serves the state of Oklahoma. This area code was assigned on January 1st, 1953. On January 1st, 1953 it went into service. 918 is a General Purpose Code. 918 service area does overlap with 539 area codes. Dialing pattern for local calls within the same NPA (area code) is 10D.