346
Houston
Central Time
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Energy, healthcare, aerospace, logistics and finance across Greater Houston, from Downtown's energy companies to the Texas Medical Center and the Port of Houston. As one of Houston's newer codes, 346 is common on recently issued mobile and business lines.
Greater Houston, as an overlay on the same area as 713, 281, 832 and 621, including Harris, Fort Bend, Montgomery, Brazoria, Galveston, Chambers and Liberty counties.
Used across Houston and its suburbs, including Katy, Sugar Land, Pearland, The Woodlands, Spring, Cypress, Pasadena, League City and Baytown. Clinics and practices with a 346 number can use Retell's medical answering service in Houston, and other Houston-area businesses can start with the Texas answering service.
Area code 346 entered service in July 2014 as an overlay on 713, 281 and 832, after the Houston area began running short of numbers. A fifth code, 621, followed on January 23, 2025. All five codes serve the same area, and every local call needs 10-digit dialing.
Port Houston is one of the busiest ports in the United States by tonnage.
