Get a local business phone number in Milbank, SD

What area code is Milbank, SD?

Milbank city is a Census place in Grant County, South Dakota, with an estimated 3,545 residents in 2024. All 8 exchanges NANPA lists for its rate center are in area code 605. Milbank 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.

Who holds Milbank phone exchanges

7 carriers hold the 8 exchanges assigned to Milbank's rate center. Cellco Partnership d/b/a Verizon Wireless - SD has the most, with 2. 5 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.

Milbank phone prefixes

Each prefix below is a block of up to 10,000 numbers that NANPA assigned to Milbank's rate center (MILBANK). The earliest assignment date recorded in the file for these codes is 2004. 1 of the 8 were assigned in 2020 or later.

When Milbank's exchanges were assigned

The table groups Milbank's exchanges by the decade NANPA recorded them as assigned.

Rate centers and local calling in Milbank

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

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

Businesses around Milbank

Milbank 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 Milbank number on Callata

Callata is a business phone system priced at $99 a month with 5 users included, then $20 per additional user. Callata Office includes up to 3 local business numbers, unlimited inbound calling, 1,500 pooled outbound US and Canada minutes per user each month, a browser softphone that can also ring your cell, voicemail with transcription, call recording with AI summaries, business-hours routing and E911 on every number.

Porting a number you already use in Milbank is free, and business texting is available once the carrier registration (10DLC) is approved; the registration carries a one-time $49 fee. Which specific numbers are open in a given area code depends on carrier inventory at the time you sign up.

AI agents are optional: an AI receptionist or scheduler can pick up when the team is busy or closed, take a message, send a text or email, or transfer the call. They draw on prepaid AI minutes ($0.25/minute), disclose that they are AI, and outbound AI calls require prior consent and are limited to 8am–9pm.

The comparison below uses 13 users, the rounded average establishment size in South Dakota. At list prices checked September 28, 2026, that is $324.35 a month on Ooma Office Pro and $390.00 on RingCentral RingEX Core. Callata comes to $259.00 a month for 13 users ($99 a month with 5 users included, then $20 per additional user), below both.