Get a local business phone number in Monroe, MI

What area code is Monroe, MI?

Monroe city is a Census place in Monroe County, Michigan, with an estimated 20,177 residents in 2024. All 40 exchanges NANPA lists for its rate center are in area code 734. 734 is part of an overlay with 679, so a new local number in Monroe may carry any of those codes depending on which have numbers available. Monroe is in the Eastern time zone.

According to NANPA's dialing-plan data, local calls within 734 are dialed as seven digits and toll calls as 1 plus ten digits.

Who holds Monroe phone exchanges

15 carriers hold the 40 exchanges assigned to Monroe's rate center. Michigan Bell Tel CO has the most, with 7. 26 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.

Monroe phone prefixes

Each prefix below is a block of up to 10,000 numbers that NANPA assigned to Monroe's rate center (MONROE). The earliest assignment date recorded in the file for these codes is 2001. 3 of the 40 were assigned in 2020 or later.

When Monroe's exchanges were assigned

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

How local numbers work in Monroe

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

Keeping an existing Monroe number costs nothing on Callata, because porting is free; a new number depends on what carriers have open in 734 when you pick it.

Who does business near Monroe

Monroe is part of the Monroe, MI metro area, home to 156,000 people in 2024. County Business Patterns counted 2,395 business establishments in the Monroe, MI metro area in 2023, employing 37,143 people. The largest sectors by establishment count are retail trade (376), health care and social assistance (300), and accommodation and food services (278).

Setting up a Monroe business line

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.

Porting a number you already use in Monroe 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.

Per-seat phone plans multiply by headcount. For the rounded average establishment size in the Monroe, MI metro area, 16 users on RingCentral RingEX Core come to $480.00 a month and on Ooma Office Pro $399.20, at month-to-month list prices checked September 28, 2026. Callata comes to $319.00 a month for 16 users ($99 a month with 5 users included, then $20 per additional user), below both.