Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — AREA-CODE/401

401 area code

Area code 401 is in Rhode Island. It covers Providence, Cranston, Warwick and 78 other places: 90 ZIP codes in Providence, Kent, Washington and 2 other counties. Local time there is , Eastern Time. In service since 1947, with no overlay.

Time zone
Eastern
Largest city
Providence
Overlays
none
In service since
1947
Rate centres
25
Prefixes assigned
581 (5,810,000 numbers)

Who calls from a 401 number

NANPA records the carrier each block of 401 numbers is assigned to. Of the 5.5 million 401 numbers assigned, 41% are with cable, internet-calling, business and other carriers (Onvoy and Bandwidth); 33% with mobile carriers (T-Mobile, Verizon Wireless and AT&T Mobility); 25% with local phone companies (Verizon).

That is who the numbers were assigned to: people keep their number when they change carrier, so any one number may have moved since.

Carriers holding the most 401 numbers
CarrierKindShare
VerizonLandline25%
T-MobileMobile16%
OnvoyCable, VoIP, other12%
Verizon WirelessMobile9%
AT&T MobilityMobile7%
BandwidthCable, VoIP, other7%

An area code says where a number was issued, not where the caller is: people keep their numbers when they move, and caller ID can be set to show any number, which the FCC calls spoofing. If a call you did not expect asks for money or personal details, the FCC advises hanging up and calling the company back on a number you look up yourself. Unwanted calls can be reported to the FTC at ReportFraud.ftc.gov.

Places in area code 401

The 20 places with a telephone rate centre of their own using 401, largest first. Each links to its ZIP codes.

Places in area code 401
PlaceZIP codesPopulation
Providence, RI 12 191,767
Warwick, RI 4 83,175
Pawtucket, RI 3 75,893
Woonsocket, RI 1 43,521
Coventry, RI 1 33,298
West Warwick, RI 1 31,173
Newport, RI 2 24,874
North Kingstown, RI 1 23,406
Bristol, RI 1 22,220
Westerly, RI 1 18,411
Portsmouth, RI 1 17,488
Narragansett, RI 1 13,091
Warren, RI 1 11,144
Cumberland Hill, RI — 8,648
Tiverton, RI 1 8,091
Jamestown, RI 1 5,534
Pascoag, RI 1 4,410
Little Compton, RI 1 3,584
Hope Valley, RI 1 2,297
Carolina, RI 1 1,048

Nearby places using 401

These places have no rate centre of their own in NANPA's records; the nearest one uses 401. Near an area-code boundary that can be wrong for part of a town.

ZIP codes in area code 401

90 ZIP codes in 70 towns, by the town each is mailed to, largest first. Each links to its own page.

Where 401 numbers are issued

NANPA's rate centres with the most 401 prefixes (each prefix is 10,000 numbers), under NANPA's own abbreviated names.

Rate centres using area code 401
Rate centrePlacePrefixes
PROVIDENCE Providence 235
PAWTUCKET Pawtucket 38
WOONSOCKET Woonsocket 34
NEWPORT Newport 26
WARWICK Warwick 21
CENTREDALE — 20

Counties

The counties of its ZIP codes, most residents first, with how many of its ZIP codes each has.

Which code covers where you are now? What area code am I in? answers from your location.

Questions about area code 401

Where is area code 401?

Area code 401 is in Rhode Island. It covers Providence, Cranston, Warwick and 78 other places: 90 ZIP codes in Providence, Kent, Washington and 2 other counties.

What ZIP codes are in area code 401?

90 ZIP codes, by the town each is mailed to: Providence (12, 02901 to 02940), Cranston (3, 02910 to 02921), Warwick (4, 02886 to 02889), Pawtucket (3, 02860 to 02862) and 66 more towns. The full list is on this page.

What time zone is area code 401 in?

Eastern time.

Is a 401 number a mobile or a landline?

It can be either. 33% of 401 numbers are assigned to mobile carriers and 25% to local phone companies (NANPA, 2026-10-10); the rest are with cable, internet-calling, business and paging carriers. A number keeps its area code when it moves to another carrier.

Does a 401 number mean the caller is in Rhode Island?

Not necessarily. An area code says where the number was first issued. People keep their numbers when they move or switch carriers, and calling software can show any number, so a 401 call can come from anywhere.

All 1 Rhode Island area codes, by area, with the cities each covers

Source: NANPA NPA database, central office code and thousands-block assignments, 2026-10-10. Places are matched to NANPA's rate centres by name; see sources.

Cite this page

zipcodes.pro. “Area code 401.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/area-code/401

Underlying data is public domain or openly licensed — sources, vintages and licences.