Get a local business phone number in Dupo, IL

Dupo area codes

Dupo village is a Census place in St. Clair County, Illinois, with an estimated 3,797 residents in 2024. All 3 exchanges NANPA lists for its rate center are in area code 618. 618 is part of an overlay with 730, so a new local number in Dupo may carry any of those codes depending on which have numbers available. Dupo is in the Central time zone.

According to NANPA's dialing-plan data, local calls within 618 are dialed as ten digits (area code plus number) and toll calls as 1 plus ten digits.

Phone carriers in Dupo

3 carriers hold the 3 exchanges assigned to Dupo's rate center. Harrisonville Tel. CO. has the most, with 1. 2 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.

Exchanges (NPA-NXX) assigned in Dupo

Each prefix below is a block of up to 10,000 numbers that NANPA assigned to Dupo's rate center (DUPO). The earliest assignment date recorded in the file for these codes is 2012. 1 of the 3 were assigned in 2020 or later.

When Dupo's exchanges were assigned

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

What makes a number local to Dupo

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

New local numbers are drawn from carrier inventory, so the exact 618 numbers available change over time; porting an existing number is free.

Businesses around Dupo

Dupo is part of the St. Louis, MO-IL metro area, home to 2.8 million people in 2024. County Business Patterns counted 69,470 business establishments in the St. Louis, MO-IL metro area in 2023, employing 1,263,674 people. The largest sectors by establishment count are health care and social assistance (10,427), retail trade (8,095), and professional, scientific, and technical services (7,057).

Business phone service in Dupo

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 Dupo, 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 St. Louis, MO-IL metro 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.