Get a local business phone number in Clear Lake, IA

Clear Lake area codes

Clear Lake, in Cerro Gordo County, Iowa, had a Census-estimated population of 7,602 in July 2024. All 6 exchanges NANPA lists for its rate center are in area code 641. Clear Lake is in the Central time zone.

According to NANPA's dialing-plan data, local calls within 641 are dialed as seven digits and toll calls as 1 plus ten digits.

Clear Lake exchanges by carrier

3 carriers hold the 6 exchanges assigned to Clear Lake's rate center. Cellco Partnership d/b/a Verizon Wireless - Ia has the most, with 3. 5 of them are pooled codes, which the holder shares with other carriers in blocks of 1,000 numbers. The table counts codes by the operating company NANPA assigned them to, not by who serves each number today.

Clear Lake phone prefixes

A prefix (NXX) is the three digits after the area code. Numbers starting with these prefixes are rated as local to Clear Lake. The earliest assignment date recorded in the file for these codes is 2001. None were assigned in 2020 or later.

How local numbers work in Clear Lake

What a caller sees as "local" is the area code plus prefix. In Clear Lake, those come from the CLEAR LAKE rate center, as recorded by NANPA.

Keeping an existing Clear Lake number costs nothing on Callata, because porting is free; a new number depends on what carriers have open in 641 when you pick it.

The local business market

Clear Lake is part of the Mason City, IA micropolitan area, home to 49,800 people in 2024. County Business Patterns counted 1,520 business establishments in the Mason City, IA micropolitan area in 2023, employing 21,658 people. The largest sectors by establishment count are retail trade (226), other services (except public administration) (173), and health care and social assistance (146).

Business phone service in Clear Lake

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.

If you already have a number in Clear Lake, porting it to Callata is free. Texting from a local number requires a one-time carrier registration (10DLC, $49), and the numbers available in any area code depend on carrier inventory when you choose them.

Optional AI agents (receptionist, sales, support or scheduler) can answer calls after hours or when nobody picks up, take messages, text, email and transfer to your team. They are billed from prepaid AI minutes at $0.25 per minute, identify themselves as AI, and may only place outbound calls to people who consented, between 8am and 9pm.

The comparison below uses 14 users, the rounded average establishment size in the Mason City, IA micropolitan area. At list prices checked September 28, 2026, that is $349.30 a month on Ooma Office Pro and $420.00 on RingCentral RingEX Core. On Callata the same 14 people cost $279.00 a month, less than either per-seat plan.