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/661

661 area code

Area code 661 is in California. It covers Bakersfield, Santa Clarita, Lancaster and 90 other places: 75 ZIP codes in Kern, Los Angeles, Tulare and 1 other county. Local time there is , Pacific Time. In service since 1999, with no overlay.

Time zone
Pacific
Largest city
Bakersfield
Overlays
none
In service since
1999
Rate centres
32
Prefixes assigned
674 (6,740,000 numbers)

Who calls from a 661 number

NANPA records the carrier each block of 661 numbers is assigned to. Of the 6.5 million 661 numbers assigned, 42% are with mobile carriers (T-Mobile, AT&T Mobility and Verizon Wireless); 36% with cable, internet-calling, business and other carriers (Onvoy and Bandwidth); 21% with local phone companies (AT&T).

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 661 numbers
CarrierKindShare
AT&TLandline18%
T-MobileMobile17%
AT&T MobilityMobile15%
OnvoyCable, VoIP, other13%
Verizon WirelessMobile10%
BandwidthCable, VoIP, other5%

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 661

The 21 places with a telephone rate centre of their own using 661, largest first. Each links to its ZIP codes.

Places in area code 661
PlaceZIP codesPopulation
Bakersfield, CA 22 411,986
Santa Clarita, CA 5 230,221
Lancaster, CA 6 169,169
Palmdale, CA 6 164,634
Delano, CA 2 51,679
Wasco, CA 1 26,558
Rosamond, CA 1 21,473
Shafter, CA 1 21,193
Arvin, CA 1 19,539
Mc Farland, CA 1 15,599
Tehachapi, CA 2 11,946
Earlimart, CA 1 7,214
Taft, CA 1 7,125
Mojave, CA 2 5,173
Edwards, CA 2 3,559
Lost Hills, CA 1 1,926
Buttonwillow, CA 1 1,163
Lake Hughes, CA 1 888
Lebec, CA 1 797
California Hot Springs, CA 1 21
Cuyama, CA — 21

Nearby places using 661

These places have no rate centre of their own in NANPA's records; the nearest one uses 661. Near an area-code boundary that can be wrong for part of a town.

ZIP codes in area code 661

75 ZIP codes in 33 towns, by the town each is mailed to, largest first. Each links to its own page.

Where 661 numbers are issued

NANPA's rate centres with the most 661 prefixes (each prefix is 10,000 numbers), under NANPA's own abbreviated names.

Rate centres using area code 661
Rate centrePlacePrefixes
BKFD MAIN Bakersfield 150
PLDL PLDL Palmdale 96
SNCA NHCS Santa Clarita 67
LANCASTER Lancaster 56
BKFD SOUTH Bakersfield 50
BKFD NORTH Bakersfield 29

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 661

Where is area code 661?

Area code 661 is in California. It covers Bakersfield, Santa Clarita, Lancaster and 90 other places: 75 ZIP codes in Kern, Los Angeles, Tulare and 1 other county.

What ZIP codes are in area code 661?

75 ZIP codes, by the town each is mailed to: Bakersfield (22, 93301 to 93390), Santa Clarita (5, 91350 to 91390), Lancaster (6, 93534 to 93586), Palmdale (6, 93550 to 93599) and 29 more towns. The full list is on this page.

What time zone is area code 661 in?

Pacific time.

Is a 661 number a mobile or a landline?

It can be either. 42% of 661 numbers are assigned to mobile carriers and 21% 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 661 number mean the caller is in California?

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 661 call can come from anywhere.

Other area codes in California

All 41 California 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 661.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/area-code/661

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