North American Numbers Source-cited · ownership disclosed
Area code
401
In service
United States · since 1947

Rhode Island (statewide)

Area code 401 is one of the original 1947 area codes and serves the entire state of Rhode Island as a single, unsplit numbering plan area. It has never been split or overlaid.

The essentials Numbering data · NumberResearch · as of 2026-09-18
Place
Rhode Island (statewide)
Type
geographic
Status
in service
In service since
1947
Projected exhaust
2051 Q2

Status, dates and counts are read from NumberResearch (NANPA / CNAC / FCC records). Assignment records show initial assignees, not the carrier serving a number today.

A · Where it is

Where 401 is

The entire state of Rhode Island (all five counties: Providence, Kent, Washington, Newport, and Bristol)..

Communities served wholly or partly by 401:

ProvidenceWarwickCranstonPawtucketEast ProvidenceWoonsocketNewport

Statewide code; city list is general knowledge, not enumerated in the cited article.

B · Relationships

How it relates to other codes

The codes 401 was split from, spawned, or shares its area with. A split divides the map and changes some numbers; an overlay shares the same ground and changes none — what's the difference?

Related · 1988 508 South-central & southeastern Massachusetts (Worcester) Adjacent Massachusetts codes 508/774 to the north and east.
Related · 1995 860 Connecticut (except southwest) Adjacent Connecticut codes 860/959 to the west.
What's changing. No overlay and no split; 401 remains the sole area code for Rhode Island. Not projected to exhaust until ~2055.
C · History

How 401 got here

1947
Area code 401 established as one of the original North American area codes, covering all of Rhode Island.
Source: Wikipedia
D · Capacity

How full it is

Prefixes assigned
630
Prefixes available
170
Thousands-blocks assigned
2,617

Prefix-assignment counts describe allocation to carriers, not how many individual numbers are in use. Full technical records: NumberResearch ↗.

Compare 401 with another code →
Sources
Wikipedia ↗
Area code 401
NumberResearch.org ↗
Live status, dates, assignment counts and exhaust forecast — data as of 2026-09-18 (CC BY 4.0).

Place, relationships and history above are compiled by North American Numbers from the sources listed and last checked 2026-09-18. A check date is not an expert review — see how this is made. Flag an error.