Get a local business phone number in Madison, SD

What area code is Madison, SD?

With 6,086 residents in the Census 2024 estimate, Madison sits in Lake County, South Dakota. All 8 exchanges NANPA lists for its rate center are in area code 605. Madison is in the Central and Mountain time zone.

According to NANPA's dialing-plan data, local calls within 605 are dialed as ten digits (area code plus number) and toll calls as 1 plus ten digits.

Madison exchanges by carrier

6 carriers hold the 8 exchanges assigned to Madison's rate center. Qwest Corporation has the most, with 2. 6 of them are pooled codes, which the holder shares with other carriers in blocks of 1,000 numbers. Holding a code means NANPA assigned that block of numbers to the carrier for this rate center; individual numbers may since have been ported elsewhere.

Madison phone prefixes

These are the central office codes NANPA records for Madison. A caller seeing one of them recognizes a local number. The earliest assignment date recorded in the file for these codes is 2001. 1 of the 8 were assigned in 2020 or later.

When Madison's exchanges were assigned

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

Rate centers and local calling in Madison

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

If your business already has a Madison number, porting it to Callata is free and keeps it on your cards, listings and vehicles.

Who does business near Madison

Madison is outside any Census metro or micropolitan area, so the figures below are statewide. County Business Patterns counted 29,106 business establishments in South Dakota in 2023, employing 383,805 people. The largest sectors by establishment count are retail trade (3,838), construction (3,802), and other services (except public administration) (2,986).

A Madison 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 Madison, 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 South Dakota, 13 users on RingCentral RingEX Core come to $390.00 a month and on Ooma Office Pro $324.35, at month-to-month list prices checked September 28, 2026. On Callata the same 13 people cost $259.00 a month, less than either per-seat plan.