931
Area code
Statusin service
Introduced1997-09-15
JurisdictionTN, US
Local dialing7D
Time zoneEastern / Central
Last verified2026-09-17
Utilization 71.1% of assignable prefixes assigned
As of 09/17/2026
0%563 of ~792 assignable NXX values (200–999 excl. N11)100%
Prefix-level assignment does not equal number-level exhaustion; thousands-block pooling extends capacity. First assignment on record 2001-01-26, most recent 2026-07-02.
Area codes serve rate-center geographies, not municipal boundaries. “TN” identifies the jurisdiction, not an exact city footprint.
Top assignees
Ranked by assigned prefixes · initial assignee ≠ current carrier| Rank | Assignee | Prefixes | Share |
|---|---|---|---|
| 01 | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 80 | 14.2% |
| 02 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 72 | 12.8% |
| 03 | NEW CINGULAR WIRELESS PCS, LLC - GA | 53 | 9.4% |
| 04 | LEVEL 3 COMMUNICATIONS, LLC - TN | 45 | 8% |
| 05 | POWERTEL NASHVILLE LICENSES, INC. | 39 | 6.9% |
| 06 | ONVOY, LLC - TN | 32 | 5.7% |
| 07 | CHARTER IP ENABLED SERVICES, LLC | 28 | 5% |
| 08 | PAETEC ITEL, LLC | 26 | 4.6% |
| 09 | TWIN LAKES TEL. COOP. CORP. | 19 | 3.4% |
| 10 | CITIZENS COMM CO TN DBA FRONTIER COMM OF TN, LLC | 19 | 3.4% |
Important: these are initial assignees from NANPA CO-code records — the carrier a prefix was originally assigned to. Because of number portability, the current serving carrier of any individual number may differ.
Change history
Recorded events for this NPA- 1997-09-15Area code 931 entered service (created from 615).
Planning letters & orders
Primary documents| Date | Document | Subject |
|---|---|---|
| 1997-08-15 | PL-081 ↗ | NANP-Split of 615 (Tennessee) Numbering Plan Area (NPA) |