Area code 661

Area code 661 at a glance

661 is one of 41 geographic area codes serving California; NANPA records its in-service date as February 13, 1999. It is not part of an overlay, so every number in its territory starts with 661. It is in the Pacific time zone. The places with the most assigned exchanges include Bakersfield, Lancaster, Bakersfield, Bakersfield, and Delano. By population, its largest named places are Bakersfield, Lancaster, Delano, Wasco, and Shafter.

Cities and towns in area code 661

661 holds 3.1% of the 22,087 central office codes assigned in California, the 24th most of the state's 41 codes. 10 Census places could be matched to rate centers with 661 exchanges; the most populous are Bakersfield (417,000), Lancaster (167,000), Delano (53,198), and Wasco (27,409). Each place page lists the exact prefixes and carriers for that town.

Dialing 661 numbers

According to NANPA's dialing-plan data, local calls within 661 are dialed as seven digits and toll calls as seven digits. Seven-digit local dialing is still permitted here, but customers calling from other area codes, and every mobile contact list, use all ten digits.

Phone companies in area code 661

52 carriers hold the 674 central office codes assigned in 661. Pacific Bell has the most, with 144 (21%). 531 of the codes (79%) are pooled, meaning the code holder shares blocks of 1,000 numbers with other carriers instead of using all 10,000 itself. The code holder is not necessarily the carrier serving a given number today, since numbers can be ported between providers.

Rate centers and towns in 661

NANPA assigns each central office code to a rate center, the local calling area that decides whether a call is local or toll. 661 has codes in 32 rate centers. Rate center names in the file are abbreviations; where one matches a Census place, the table links to that city's local-number page.

661 code assignments over time

An area code has 800 possible central office codes that start with 2 through 9, a few of which are reserved (such as N11 service codes and 555). 674 are assigned in 661, 84% of 800. 111 were assigned in 2020 or later.

A local 661 number on Callata

Callata Office costs $99 per month for up to 5 people, and each additional user is $20 a month. That covers up to 3 local numbers, calling from a browser or your cell, transcribed voicemail, recorded calls with AI summaries, after-hours routing and E911 on each number.

Porting a number you already use in area code 661 is free, and business texting is available once the carrier registration (10DLC) is approved; the registration carries a one-time $49 fee. Which specific numbers are open in a given area code depends on carrier inventory at the time you sign up.

AI agents are optional: an AI receptionist or scheduler can pick up when the team is busy or closed, take a message, send a text or email, or transfer the call. They draw on prepaid AI minutes ($0.25/minute), disclose that they are AI, and outbound AI calls require prior consent and are limited to 8am–9pm.