CallataGuidesGet a local business phone number in Petersburg, MI
Petersburg's area code, prefixes and carriers from NANPA records, and how to put a Petersburg number in front of your customers.
- Area code
- 734
- Exchanges
- 2NANPA-assigned
- Carriers
- 2
- Population
- 1,162Census 2024 est.
Petersburg area codes
Petersburg city is a Census place in Monroe County, Michigan, with an estimated 1,162 residents in 2024. All 2 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 Petersburg may carry any of those codes depending on which have numbers available. Petersburg 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.
| Area code | Exchanges here | Share | In service since | Overlay with | Time zone |
|---|---|---|---|---|---|
| 734 | 2 | 100% | 1997 | 679 | Eastern |
Source: NANPA utilized central office code file and NPA report, dated 10/01/2026.
Petersburg exchanges by carrier
2 carriers hold the 2 exchanges assigned to Petersburg's rate center. Paetec Itel, LLC has the most, with 1. 2 of them are pooled codes, which the holder shares with other carriers in blocks of 1,000 numbers. A business number in Petersburg can come from any of these blocks; once it is yours, porting lets it move between providers.
| Carrier (NANPA operating company) | Exchanges | Share |
|---|---|---|
| Paetec Itel, LLC | 1 | 50% |
| Deerfield Farmers Tel. CO. | 1 | 50% |
Carrier names are the operating company (OCN) names on NANPA's utilized central office code file dated 10/01/2026. A carrier holding a code may port numbers to other carriers.
Petersburg phone prefixes
Each prefix below is a block of up to 10,000 numbers that NANPA assigned to Petersburg's rate center (PETERSBURG). None were assigned in 2020 or later.
| Area code | Prefixes (NXX) |
|---|---|
| 734 | 220, 279 |
Source: NANPA utilized central office code file.
What makes a number local to Petersburg
NANPA ties every exchange to a rate center. For Petersburg that is PETERSBURG, so a number from one of these exchanges reads as local to people in and around Petersburg.
If your business already has a Petersburg number, porting it to Callata is free and keeps it on your cards, listings and vehicles.
Businesses around Petersburg
Petersburg 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).
| Industry | Establishments | Employees | Employees per establishment |
|---|---|---|---|
| Limited-service restaurants | 103 | 2,130 | 20.7 |
| Full-service restaurants | 87 | 1,792 | 20.6 |
| Physician practices | 77 | 761 | 9.9 |
| Residential remodelers | 54 | 145 | 2.7 |
| Insurance agencies and brokerages | 47 | 194 | 4.1 |
| Landscaping services | 43 | 127 | 3.0 |
| General automotive repair shops | 36 | 136 | 3.8 |
| Dental offices | 34 | 274 | 8.1 |
Selected small-business industries (six-digit NAICS) covered by these guides. Source: Census County Business Patterns 2023.
A Petersburg number on Callata
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 Petersburg, 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.
A 16-person team is the benchmark here, the rounded average establishment size in the Monroe, MI metro area. Billed per seat at month-to-month list prices (checked September 28, 2026), RingCentral RingEX Core costs $480.00 a month and Ooma Office Pro $399.20. On Callata the same 16 people cost $319.00 a month, less than either per-seat plan.
| Provider (plan) | Pricing basis | Per month | Per year |
|---|---|---|---|
| Callata (Callata Office) | $99 incl. 5 users, $20 per extra user | $319.00 | $3,828.00 |
| Quo (Starter) | $19.00 per user | $304.00 | $3,648.00 |
| Nextiva (Core) | $23.00 per user | $368.00 | $4,416.00 |
| Ooma (Office Pro) | $24.95 per user | $399.20 | $4,790.40 |
| Dialpad (Standard) | $27.00 per user | $432.00 | $5,184.00 |
| RingCentral (RingEX Core) | $30.00 per user | $480.00 | $5,760.00 |
Competitor prices are each vendor's published month-to-month list price per user for its lowest plan that includes business calling and texting, checked September 28, 2026: Quo Starter $19, Nextiva Core $23, Ooma Office Pro $24.95 (Essentials excludes texting; one-time $29.95 activation not included), Dialpad Standard $27, RingCentral RingEX Core $30 ($20 billed annually). Prices exclude taxes and fees and may change; annual contracts lower some competitors' prices.
Frequently asked questions
What area code is Petersburg, MI?
734. All exchanges NANPA lists for Petersburg are in 734.
How many phone companies have exchanges in Petersburg?
2, holding 2 exchanges between them, according to NANPA's 10/01/2026 file.
Can I keep my existing Petersburg business number?
Yes. Porting an existing number to Callata is free. Texting from it starts after carrier registration (10DLC), a one-time $49 fee.
How much is a business phone line in Petersburg?
Callata is $99 a month with 5 users included, then $20 per additional user, with up to 3 local numbers; 16 users come to $319.00 a month. For comparison, 16 users on RingCentral RingEX Core list at $480.00 a month (checked September 28, 2026).