Area Code 615

Tennessee

Area code 615 serves Tennessee, primarily Nashville, in the Central Time (CT) time zone. It has served the region since 01-Jan-1954.

Published: Verified against NANPA and FCC records

Overlay Area Code

This area code shares its geographic footprint with an overlay code, so the same cities are served by two area codes. Because overlays leave existing numbers untouched, this region's relief planning favors adding codes over redrawing boundaries.

The codes serving this same region: area code 629 (Nashville).

With prefix utilization already at 97.5%, numbering resources here are under sustained pressure — context that explains why overlays were introduced.

In service since: 01-Jan-1954

Learn more about overlay and split area codes →

Area Code Splits

2 area codes have been carved out of this code's original territory through geographic splits. Each split was a relief action: as demand grew, part of the region was reassigned to a new code rather than overlaying the whole territory.

Split into: area code 423 (Chattanooga), area code 931 (Clarksville).

Learn more about overlay and split area codes →

Demographics & Economics

Total Population
3,077,030
Population Density
256 people/sq mi
above U.S. average (U.S.: 95 people/sq mi)
Median Household Income
$83,047
near U.S. median (U.S.: $80,734)
Poverty Rate
10.8%
below U.S. average (U.S.: 12.5%)
Unemployment Rate
3.7%
below U.S. average (U.S.: 5.2%)
Education Attainment
Bachelor's Degree+
38.7%
near U.S. average (U.S.: 35.7%)
High School or Lower
30.4%

Statistics are population-weighted aggregations from Census ACS 5-year estimates. Population figures are approximate — see Sources & Methodology for details on how area code populations are derived.

See how this area code compares to all US area codes in the income ranking and density ranking.

Time Zone

  • Central Time (CT)

NANPA Relief Status

According to the latest NANPA analysis (July 2026), this area code is not currently listed as exhausting within the next 36 months. No relief planning is in progress for this NPA.

Source: NANPA NPA Relief Planning Reports · See all relief planning statuses

Current Time

Central Time (CT)
 
 

Prefix Utilization

Geographic Coverage

State

TN

Major Cities

  • Nashville
  • Murfreesboro
  • Franklin
  • Hendersonville
  • Smyrna
  • Spring Hill
  • Gallatin
  • Brentwood
  • Lebanon
  • Mount Juliet
  • La Vergne
  • Springfield
  • Goodlettsville
  • Dickson
  • Nolensville
  • White House
  • Portland
  • Hartsville/Trousdale County
  • Fairview
  • Thompson's Station
  • Greenbrier
  • Green Hill
  • Millersville
  • Lafayette

and 54 more cities

Area Code 615 geographic coverage map (light mode)

History

Area code 615 was established in 1954 as a geographic area code. Over time, area code area code 931 was split from 615. It shares its territory with area code area code 629.

Demographics

The estimated population served by area code 615 is approximately 3,077,030. The population density is 256 people per square mile, which is higher than the national average of 95. The median household income is $83,047, which is near the national median of $80,734. Approximately 38.7% of adults hold a bachelor's degree or higher, compared to the national rate of 35.7%. This rate is near the national average. The poverty rate stands at 10.8%, which is lower than the national rate of 12.5%.

County Coverage

Population-weighted county share based on aggregated ZCTA population (100% = total mapped population for area code 615).

CountyPopulationShare
Davidson, TN1,001,93332.6%
Rutherford, TN472,53415.4%
Williamson, TN311,79110.1%
Wilson, TN280,0439.1%
Sumner, TN241,4097.8%
Robertson, TN158,4895.2%
Cheatham, TN119,5463.9%
Smith, TN101,4053.3%
Trousdale, TN76,9452.5%
Dickson, TN68,7572.2%
Macon, TN52,0381.7%
Montgomery, TN33,9011.1%
Cannon, TN32,9331.1%
Hickman, TN28,5670.9%
Warren, TN24,3830.8%
DeKalb, TN22,0490.7%
Jackson, TN14,6700.5%
Bedford, TN13,6390.4%
Marshall, TN10,2060.3%
Houston, TN5,2320.2%
Clay, TN4,3630.1%
Coffee, TN2,1970.1%

Area Code 615 Family Tree

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615423629931729865
6
Total Codes
3
Splits
2
Overlays
2
Max Depth

All Descendants

Code ▲StateType In Service Parent
423TNsplit11-Sep-1995615
629TNoverlay28-Mar-2015615
729TNoverlay05-Sep-2025423
865TNsplit01-Nov-1999423
931TNsplit15-Sep-1997615

Area code 615 was originally assigned in 01-Jan-1954 to serve TN. Over the years, it has generated 5 descendant area codes through a combination of geographic splits and overlays as demand for telephone numbers grew.

Call Context

Metropolitan area

This area code covers a metropolitan region in TN with moderate to high population density, centered on Nashville and surrounding communities.

Nearby Area Codes

Area codes geographically closest to 615.

Area code 931 map card showing Clarksville (light mode)
931TNClarksvilleAll time zonesSplit
Area code 270 map card showing Bowling Green (light mode)
270KYBowling GreenAll time zonesGeographic
Area code 364 map card showing Bowling Green (light mode)
364KYBowling GreenAll time zonesOverlay
Area code 731 map card showing Jackson (light mode)
731TNJacksonCentral Time (CT)Split

Other Area Codes in Tennessee

Area codes that also serve Tennessee, linked for easy comparison.