731
Area code
Statusin service
Introduced2001-02-12
JurisdictionTN, US
Local dialing10D
Time zoneCentral
Last verified2026-09-17
Utilization 51.8% of assignable prefixes assigned
As of 09/17/2026
0%410 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 2001-01-23, most recent 2026-07-23.
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 | 82 | 20% |
| 02 | NEW CINGULAR WIRELESS PCS, LLC - GA | 53 | 12.9% |
| 03 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 42 | 10.2% |
| 04 | ONVOY, LLC - TN | 36 | 8.8% |
| 05 | LEVEL 3 COMMUNICATIONS, LLC - TN | 36 | 8.8% |
| 06 | PAETEC ITEL, LLC | 21 | 5.1% |
| 07 | AENEAS COMMUNICATIONS, LLC - TN | 18 | 4.4% |
| 08 | CHARTER IP ENABLED SERVICES, LLC | 14 | 3.4% |
| 09 | MULTIPLE OCN LISTING | 10 | 2.4% |
| 10 | POWERTEL MEMPHIS LICENSES, INC. | 9 | 2.2% |
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- 2001-02-12Area code 731 entered service (created from 901).
Planning letters & orders
Primary documents| Date | Document | Subject |
|---|---|---|
| 2021-01-08 | PL-556 ↗ | Transition to 10-digit dialing (for 988 as 3-digit access to National Suicide Prevention Lifeline) – supersedes PL-544 |
| 2020-08-17 | PL-544 ↗ | Transition to 10-digit dialing (for 988 as 3-digit access to National Suicide Prevention Hotline |
| 2000-10-30 | PL-247 ↗ | 901 NPA Split, Creating 731 NPA (Tennessee) |