All 800-Series Area Codes

The 800-series is unique among area code groups for one reason most users already recognize: 800 itself is the original US toll-free code, the single most recognizable three-digit prefix in North American telephony and the head of the toll-free family that calls outside any specific geography. That association shapes how this range is read — but most of the other codes in the 8xx block are standard geographic assignments serving cities across the country. 808 covers all of Hawaii from Honolulu to the outer islands, the only US area code assigned to the state. South Carolina shows up unusually often: 803 in Columbia, 843 in Charleston, and 864 in Greenville cover the state's main population centers, with 839 and 854 added as overlays. Other notable codes include 818 in the San Fernando Valley, 832 in Houston, 857 in Boston, 859 in Lexington, and 872 in Chicago — each anchoring a major metro or regional hub. The range also reaches into the Caribbean through codes that share the North American Numbering Plan with the United States, though those entries are not listed on this page.

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