Area Code 661

About Area Code 661

Area code 661 is a geographic telephone area code assigned to Bakersfield, California. It operates in the Pacific time zone and was first introduced in 1999. Split from 805. Central coast & southern San Joaquin Valley.

Within California, area code 661 shares numbering capacity with 35 other area codes. The state's 38,965,193-person population (2023 Census Bureau estimate) is served by a combined 36 active codes, with 661 primarily responsible for the Bakersfield region. California's state capital is Sacramento, and its largest city is Los Angeles.

When you receive a call from a 661 number on your Caller ID, the call originated from a phone number assigned to the 661 area code — but be aware that Local Number Portability (in effect since 2003) means the caller could be physically located anywhere in the US or Canada. Area code 661 only confirms where the number was originally assigned.

Where is the 661 area code located?

Area code 661 is assigned to Bakersfield, California, in the Pacific time zone. The state of California uses 36 active area codes, and 661 is one of them. Calls placed from the 661 area code originate from numbers assigned by NANPA — the North American Numbering Plan Administrator — and the 661 prefix appears on Caller ID for both landline and wireless calls placed from this region.

The Pacific time zone observes Daylight Saving Time, shifting from UTC-8 to UTC-7 in summer. The local time shown above is always current, so you can quickly check whether it's a reasonable hour to call back.

What cities and counties use the 661 area code?

The 661 area code serves 11 notable cities, listed below in order of population. The largest city in the 661 territory is Bakersfield (408,000 residents in Kern County).

• Bakersfield, CA — 408,000 residents (4% of 661 numbers)
• Los Angeles, CA — 3,898,747 residents (38.6% of 661 numbers)
• San Diego, CA — 1,381,611 residents (13.7% of 661 numbers)
• San Jose, CA — 971,233 residents (9.6% of 661 numbers)
• San Francisco, CA — 808,437 residents (8% of 661 numbers)
• Fresno, CA — 545,567 residents (5.4% of 661 numbers)
• Sacramento, CA — 524,943 residents (5.2% of 661 numbers)
• Long Beach, CA — 456,154 residents (4.5% of 661 numbers)
• Oakland, CA — 440,646 residents (4.4% of 661 numbers)
• Anaheim, CA — 346,824 residents (3.4% of 661 numbers)

Phone number format in area code 661

All phone numbers within area code 661 follow the standard North American 10-digit format:(661) NXX-XXXX. The NXX is the central office prefix (also called an "exchange") and XXXX is the subscriber line number. For long-distance calls within the NANP, dial 1 + 661 + NXX + XXXX. From outside North America, dial your country's international access code, then 1 (the NANP country code), then the 10-digit number.

If you need to verify whether a specific 661 number is wireless, landline, or VoIP, you can use our reverse phone lookup tool. Be aware that number portability means the area code no longer guarantees the caller's physical location — only where the number was first assigned.

History of area code 661

Split from 805. Central coast & southern San Joaquin Valley.

The original 86 area codes were assigned by AT&T and Bell Labs in 1947 as part of the North American Numbering Plan. At the time, rotary-dial phones meant codes with lower digits (like 212 for NYC, 213 for LA, 312 for Chicago) were given to the largest cities because they took less time to dial. Today's area code assignments still reflect those early choices, even though touch-tone and cell phones made the original reason obsolete.

Is the 661 area code safe to answer?

Area code 661 itself is a normal geographic code with no elevated spam risk. That said, scammers can spoof any area code — including 661 — so if you don't recognize the full number, let it go to voicemail and verify the caller's identity before calling back.