Tennessee, United States
Central Time
2:15 AM
Area Code
729
State / Province
Tennessee
Country
United States
Time Zone
Central Time
City data unavailable for this area code.
Use the E.164 format for clickable phone links (RFC 3966):
<a href="tel:+17295550100">+17295550100</a><a href="tel:+17295550199">+17295550199</a>729 was activated on Sep 5, 2025 as an overlay covering Tennessee (Chattanooga, Tri-Cities). It shares the same geography as 423, which means ten-digit dialing is required for local calls in this region — dial the area code even when calling a neighbor.
A new 729 number does not indicate a different city than 423. Overlays are added when the existing code runs out of available prefixes.
See every North American overlayArea code 729 is a North American Numbering Plan (NANP) telephone area code assigned to Tennessee, United States. It is one of 8 area codes serving Tennessee. As population and demand for phone numbers grew, the region was divided into multiple numbering plan areas to avoid exhausting the available 7-digit number pool.
Yes. 729 is an active North American Numbering Plan (NANP) area code, currently assigned to Tennessee, United States. It is safe to answer or dial calls using this area code.
All numbers in the 729 area code observe Central Time (IANA timezone: America/Chicago). Central Time is UTC−6 in winter (CST) and UTC−5 in summer (CDT). When placing a call to a 729 number from a different time zone, check the current local time above to avoid calling outside of business hours.
From within Tennessee, dial the 7-digit local number directly if calling within the same rate center, or dial 1 + 729 + 7-digit number for long-distance calls within North America. From outside the US or Canada, dial your country's international exit code followed by 1 729 XXX XXXX. The country code for both the United States and Canada in NANP is +1.
Format 729 numbers using E.164 notation as required by RFC 3966: prefix with +1 and omit dashes and parentheses (e.g., +17295550100). This format ensures tel: links work correctly on all mobile browsers and VoIP apps. See the tel: URI formatting guide for complete examples.