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317 Area Code

Area Code Overview

Area code 317 is a geographic telephone area code in Indiana that went into service on January 1, 1947. The geographic regions covered by this area code overlay has a population of approximately 1,778,033.

Overlay and Dialing Rules

  • Area Code: 317
  • State: Indiana
  • Type: General Purpose Code
  • In Service Date: January 1, 1947
  • Overlay Complex: 317/463
  • Local Dialing Plan: This area does require you to dial the area code when calling locally.

Estimated Number of Assigned Phone Numbers in Area Code 317

This area code is tied for 79th out of 363 nationwide in estimated assigned phone numbers. Within the state territory it serves, it is ranked 1st out of 8.

6,265,000

Estimated Service-Type Mix of Assigned Phone Numbers in Area Code 317

Total assigned 6,265,000
Wireless
2,566,000 assigned
40.96%
Wireline and VoIP
3,213,000 assigned
51.28%
Other / Unclassified
486,000 assigned
7.76%

Estimated Share of Wireless Numbers Originally Assigned to Each Carrier in Area Code 317

Estimated assigned wireless phone numbers: 2,566,000

Numbers may later be ported to another carrier, but this chart reflects original number assignment, not current subscriber share.

T-Mobile 1,008,000 (39.28%)
Verizon Wireless 786,000 (30.63%)
AT&T Wireless 772,000 (30.09%)

Estimated Share of Wireline and VoIP Numbers Originally Assigned to Each Carrier in Area Code 317

Estimated assigned wireline and VoIP phone numbers: 3,213,000

AT&T 1,575,000 (49.02%)
Lumen 364,000 (11.33%)
Bandwidth 328,000 (10.21%)
Onvoy 320,000 (9.96%)
Comcast Business 166,000 (5.17%)
PAETEC ITEL, LLC 156,000 (4.86%)
MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IN 56,000 (1.74%)
BHN IP ENABLED SERVICES, LLC 54,000 (1.68%)
Peerless Network 54,000 (1.68%)
HANCOCK RURAL TELEPHONE CORP. DBA NINESTAR CONNECT 40,000 (1.24%)
Spectrum 34,000 (1.06%)
TERRA NOVA TELECOM INC. 22,000 (0.68%)

Other / Unclassified Assigned Numbering in Area Code 317

Estimated assigned other or unclassified phone numbers: 486,000

SPOK, INC. 160,000 (32.92%)
AMERICAN MESSAGING SERVICES, LLC 120,000 (24.69%)
BRIGHTSPEED OF INDIANA, LLC 62,000 (12.76%)
TELEPORT COMMUNICATIONS AMERICA, LLC - IN 41,000 (8.44%)
HANCOCK COMMUNICATIONS, INC. - IN 38,000 (7.82%)
INDIANA PAGING NETWORK, INC. 30,000 (6.17%)
IP HORIZON LLC 20,000 (4.12%)
SMITHVILLE COMM., INC DBA SMITHVILLE TELEPHONE CO. 10,000 (2.06%)
STRATUS NETWORKS 3,000 (0.62%)
COMMUNICATIONS CORP. OF INDIANA 2,000 (0.41%)

Cities and Towns in Area Code 317

Acton, Indiana Bargersville, Indiana Brownsburg, Indiana Carmel, Indiana Charlottesville, Indiana Cicero, Indiana Clayton, Indiana Cumberland, Indiana Danville, Indiana Fairland, Indiana Fishers, Indiana Fortville, Indiana Franklin, Indiana Greenfield, Indiana Greenwood, Indiana Indianapolis, Indiana Lizton, Indiana Marietta, Indiana Maxwell, Indiana Mccordsville, Indiana Monrovia, Indiana Mooresville, Indiana New Palestine, Indiana Nineveh, Indiana Noblesville, Indiana Oaklandon, Indiana Pittsboro, Indiana Plainfield, Indiana Shelbyville, Indiana Sheridan, Indiana Trafalgar, Indiana West Newton, Indiana Westfield, Indiana Whiteland, Indiana Whitestown, Indiana Zionsville, Indiana

These geographic regions are also served by area code 463.

How These Figures Were Built

These figures are estimates based on public phone-number assignment records. They are meant to show the likely mix of assigned phone numbers associated with area code 317, not live customer counts.

Some providers may have assigned phone numbers tied to this area code even if they do not actively market or sell service locally. These figures reflect public number-assignment records, not confirmed local service availability.

They also do not reflect number portability at the individual phone-number level, so some numbers may now be used on a different network or by a different provider than the original assignment records suggest.

Population data and locality matching provided by GeoNames.

Last refreshed: April 15, 2026 6:22 pm