Get a local business phone number in Duncan, OK

What area code is Duncan, OK?

With 23,174 residents in the Census 2024 estimate, Duncan sits in Stephens County, Oklahoma. All 15 exchanges NANPA lists for its rate center are in area code 580. Duncan is in the Central time zone.

According to NANPA's dialing-plan data, local calls within 580 are dialed as seven digits and toll calls as 1 plus ten digits.

Duncan exchanges by carrier

8 carriers hold the 15 exchanges assigned to Duncan's rate center. Southwestern Bell has the most, with 5. 14 of them are pooled codes, which the holder shares with other carriers in blocks of 1,000 numbers. A business number in Duncan can come from any of these blocks; once it is yours, porting lets it move between providers.

Duncan phone prefixes

A prefix (NXX) is the three digits after the area code. Numbers starting with these prefixes are rated as local to Duncan. The earliest assignment date recorded in the file for these codes is 2002. 2 of the 15 were assigned in 2020 or later.

When Duncan's exchanges were assigned

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

Rate centers and local calling in Duncan

NANPA ties every exchange to a rate center. For Duncan that is DUNCAN, so a number from one of these exchanges reads as local to people in and around Duncan.

Keeping an existing Duncan number costs nothing on Callata, because porting is free; a new number depends on what carriers have open in 580 when you pick it.

Who does business near Duncan

Duncan is part of the Duncan, OK micropolitan area, home to 44,075 people in 2024. County Business Patterns counted 1,080 business establishments in the Duncan, OK micropolitan area in 2023, employing 12,439 people. The largest sectors by establishment count are retail trade (167), health care and social assistance (135), and other services (except public administration) (115).

A Duncan number on Callata

For $99 a month, Callata puts a team of up to 5 on one plan ($20 for each person after that): up to 3 local numbers, unlimited inbound calls, a pooled allowance of 1,500 outbound US and Canada minutes per user, browser and cell calling, voicemail transcription with urgency triage, recorded calls with AI summaries and business-hours routing, with E911 on every number.

If you already have a number in Duncan, 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.

A 12-person team is the benchmark here, the rounded average establishment size in the Duncan, OK micropolitan area. Billed per seat at month-to-month list prices (checked September 28, 2026), RingCentral RingEX Core costs $360.00 a month and Ooma Office Pro $299.40. On Callata the same 12 people cost $239.00 a month, less than either per-seat plan.