Get a local business phone number in Spearfish, SD

What area code is Spearfish, SD?

Spearfish city is a Census place in Lawrence County, South Dakota, with an estimated 13,803 residents in 2024. All 20 exchanges NANPA lists for its rate center are in area code 605. Spearfish 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.

Spearfish exchanges by carrier

7 carriers hold the 20 exchanges assigned to Spearfish's rate center. Cellco Partnership d/b/a Verizon Wireless - SD has the most, with 6. 13 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.

Spearfish phone prefixes

These are the central office codes NANPA records for Spearfish. A caller seeing one of them recognizes a local number. The earliest assignment date recorded in the file for these codes is 2001. None were assigned in 2020 or later.

When Spearfish's exchanges were assigned

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

What makes a number local to Spearfish

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

New local numbers are drawn from carrier inventory, so the exact 605 numbers available change over time; porting an existing number is free.

Businesses around Spearfish

Spearfish is part of the Spearfish, SD micropolitan area, home to 28,809 people in 2024. County Business Patterns counted 1,248 business establishments in the Spearfish, SD micropolitan area in 2023, employing 11,109 people. The largest sectors by establishment count are construction (194), retail trade (163), and accommodation and food services (163).

Business phone service in Spearfish

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 Spearfish, 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 Spearfish, SD micropolitan area, 9 users on RingCentral RingEX Core come to $270.00 a month and on Ooma Office Pro $224.55, at month-to-month list prices checked September 28, 2026. On Callata the same 9 people cost $179.00 a month, less than either per-seat plan.