401
Area code
RI
United States geographic area code, in service since 1947-01-01.
Statusin service
Introduced1947-01-01
JurisdictionRI, US
Local dialing7D
Time zoneEastern
Last verified2026-09-17
Utilization 79.4% of assignable prefixes assigned
As of 09/17/2026
0%629 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 2001-01-16, most recent 2026-03-27.
Area codes serve rate-center geographies, not municipal boundaries. “RI” identifies the jurisdiction, not an exact city footprint.
Top assignees
Ranked by assigned prefixes · initial assignee ≠ current carrier| Rank | Assignee | Prefixes | Share |
|---|---|---|---|
| 01 | VERIZON NEW ENGLAND INC. | 178 | 28.3% |
| 02 | PAETEC ITEL, LLC | 65 | 10.3% |
| 03 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - RI | 42 | 6.7% |
| 04 | OMNIPOINT MIAMI E LICENSE, LLC | 41 | 6.5% |
| 05 | COMCAST IP PHONE, LLC | 35 | 5.6% |
| 06 | ONVOY, LLC - RI | 32 | 5.1% |
| 07 | NEW CINGULAR WIRELESS PCS, LLC - DC | 32 | 5.1% |
| 08 | LEVEL 3 COMMUNICATIONS, LLC - RI | 32 | 5.1% |
| 09 | METROPCS, INC. | 30 | 4.8% |
| 10 | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 29 | 4.6% |
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- 1947-01-01Area code 401 entered service.