Get a local business phone number in Ottumwa, IA

What area code is Ottumwa, IA?

Ottumwa, in Wapello County, Iowa, had a Census-estimated population of 25,648 in July 2024. All 15 exchanges NANPA lists for its rate center are in area code 641. Ottumwa 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.

Who holds Ottumwa phone exchanges

7 carriers hold the 15 exchanges assigned to Ottumwa's rate center. New Cingular Wireless PCS, LLC - Il has the most, with 3. 11 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.

Local prefixes for Ottumwa

These are the central office codes NANPA records for Ottumwa. A caller seeing one of them recognizes a local number. The earliest assignment date recorded in the file for these codes is 2001. 2 of the 15 were assigned in 2020 or later.

When Ottumwa's exchanges were assigned

Assignment dates show when each block of Ottumwa numbers was added to the local supply.

What makes a number local to Ottumwa

Phone numbers are tied to a rate center, the local calling area used to decide whether a call is local or toll. Ottumwa's numbers are rated to the OTTUMWA rate center in NANPA's records. A business number from one of the prefixes above shows up on customers' phones as a Ottumwa number.

New local numbers are drawn from carrier inventory, so the exact 641 numbers available change over time; porting an existing number is free.

Businesses around Ottumwa

Ottumwa is part of the Ottumwa, IA micropolitan area, home to 35,681 people in 2024. County Business Patterns counted 699 business establishments in the Ottumwa, IA micropolitan area in 2023, employing 12,594 people. The largest sectors by establishment count are retail trade (115), health care and social assistance (98), and other services (except public administration) (77).

A Ottumwa 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.

If you already have a number in Ottumwa, 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.

Per-seat phone plans multiply by headcount. For the rounded average establishment size in the Ottumwa, IA micropolitan area, 18 users on RingCentral RingEX Core come to $540.00 a month and on Ooma Office Pro $449.10, at month-to-month list prices checked September 28, 2026. On Callata the same 18 people cost $359.00 a month, less than either per-seat plan.