507 Area Code: Home of Mayo Clinic & Southern Minnesota's Heartland

Introduction

The 507 area code covers the entire southern third of Minnesota — a region anchored by Rochester, one of the most internationally recognized medical cities in the world, and stretching across a wide corridor of agricultural communities, college towns, and river cities all the way to the Iowa and South Dakota borders. Understanding the 507 area code matters whether you received an unexpected call, you're targeting southern Minnesota as a business market, or you want a local number without a physical Minnesota address. This guide covers every major city and county under 507, the full history from its 1954 creation to the 2024 overlay, the Central Time calling schedule, and how to stay safe from spoofed numbers. No other source puts all of this together in one place.

Key Takeaways

• The 507 area code covers all of southern Minnesota, including Rochester, Mankato, Austin, Winona, and Owatonna.
• It was established in 1954, making it one of the older area codes still in active use in the United States.
• A new overlay — area code 924 — was introduced in 2024, providing a second pool of numbers across the same southern Minnesota territory.
• All 507 numbers operate in the Central Time Zone — CST (UTC−6) in winter and CDT (UTC−5) in summer.
• You can get a virtual 507 phone number from anywhere — no Minnesota address or SIM card required.

What Is the 507 Area Code?

The 507 area code is the sole geographic telephone prefix for southern Minnesota within the North American Numbering Plan (NANP). It is not an overlay — it covers a distinct geographic territory separate from the Twin Cities metro codes (612, 651, 763, 952) and the northern Minnesota code (218). Every landline, mobile, and VoIP number in the southern third of the state carries the 507 prefix or the newer 924 overlay, which was added in 2024.

The territory spans from just south of the Twin Cities suburbs down to the Iowa border, and from the Mississippi River on the east to the South Dakota border on the west. It is one of the most geographically wide area codes in the Upper Midwest, covering more than 200 communities across a predominantly rural and agricultural landscape punctuated by several significant urban centers.

Rochester, Mankato, and the Cities Across Southern Minnesota

The 507 area code spans an unusually diverse range of communities — from a world-class medical destination to river towns, college campuses, and agribusiness hubs that drive Minnesota's rural economy. Rochester alone gives the 507 footprint a global identity that few regional area codes can match.

Major Cities in the 507 Area Code

• Rochester — southern Minnesota's largest city and home of Mayo Clinic, one of the top-ranked medical research and treatment centers in the world, drawing patients from over 140 countries annually
• Mankato — the region's second largest city; home of Minnesota State University Mankato and a growing manufacturing and retail economy
• Austin — headquarters of Hormel Foods, the company behind SPAM, one of the most widely distributed canned meat products globally
• Winona — a historic river city on the Mississippi; home to Winona State University and a strong manufacturing and logistics base
• Owatonna — Steele County seat; a growing commercial and distribution center along I-35
• Northfield — home of Carleton College and St. Olaf College; a prestigious college town in Rice County
• Albert Lea — Freeborn County seat; a key agricultural processing and healthcare community near the Iowa border
• Fairmont — Martin County seat in the Midwest lake district; tourism and agriculture anchor the local economy
• Marshall — home of Southwest Minnesota State University and a regional healthcare hub in the southwestern corner of the state
• Worthington — a growing manufacturing city and one of Minnesota's most culturally diverse communities

Counties in the 507 Service Area

• Olmsted County — Rochester; the most populous county in the 507 footprint
• Blue Earth County — Mankato; a major university and commercial center
• Mower County — Austin; Hormel headquarters and I-90 corridor
• Winona County — Winona; Mississippi River communities
• Rice County — Northfield and Faribault; college towns and industry
• Steele, Freeborn, Dodge, Fillmore, Houston Counties — southeastern agricultural communities stretching to the Iowa and Wisconsin borders
• Nobles, Rock, Pipestone, Lincoln, Lyon, Redwood Counties — southwestern Minnesota prairie communities near the South Dakota and Iowa borders

How 507 Became Southern Minnesota's Area Code

Minnesota's original telephone geography was simple: two area codes handled the entire state. But as the state's population grew and business phone demand expanded, that system required adjustment — and the 507 area code was the first major result. Its sibling code to the east, the 317 area code, went through a similar Midwest reorganization during the same era.

How to Get a Virtual Phone Number from CallMama

CallMama makes it straightforward to get a virtual 507 phone numberfrom anywhere in the world. Whether you're a medical device company targeting the Rochester healthcare corridor, a business serving southern Minnesota's agricultural markets, or simply someone who needs a reliable Minnesota number, CallMama gives you an active 507 number in minutes — no SIM card, no Minnesota office, and no long-term contract required.

Central Time Zone: When to Call a 507 Number

All 507 area code numbers operate on Central Time — CST (UTC−6) from early November through mid-March, and CDT (UTC−5) from mid-March through early November. This is the same time zone as Chicago, Dallas, Kansas City, and Minneapolis. Southern Minnesota does not observe any local time variation — the entire 507 area code territory follows the same Central schedule year-round.

Calling the 507 Region from Other Time Zones

For business outreach to the 507 region, aim for the 9 AM–5 PM Central window. East Coast callers have a natural early-call advantage — a 9 AM Eastern call reaches Rochester at 8 AM, just as the business day opens. International callers to Mayo Clinic's network should note that all Rochester-based contacts operate on Central Time.

Why a 507 Phone Number Matters for Minnesota Businesses

The Rochester area code carries an association that no other area code in the Upper Midwest can replicate: Mayo Clinic. With more than 1 million patient visits per year from over 140 countries, Rochester drives a massive ecosystem of healthcare vendors, medical device companies, pharmaceutical suppliers, housing providers, and hospitality businesses. For any company targeting this ecosystem, a local Rochester area code on your caller ID signals Minnesota presence immediately — and in a healthcare market where trust is everything, that signal carries real weight.

Beyond Rochester, the 507 footprint covers a broad agricultural and manufacturing economy that includes Hormel Foods in Austin, Minnesota State University Mankato, IBM's former research presence in Rochester, and a network of regional medical centers spanning every county. The southernmost tier of 507 also connects to significant cross-border commerce with Iowa and South Dakota, making a local 507 number valuable for logistics, distribution, and service businesses operating across the tri-state corridor. Businesses with customers across multiple Midwest states often compare 507 reach with the audience served by the 615 area code in Nashville to map a full regional strategy.

Studies consistently show that calls from a local area code are answered at significantly higher rates than out-of-state numbers. For healthcare suppliers, agricultural equipment vendors, staffing agencies, and real estate professionals serving the southern Minnesota market, a 507 phone number is one of the most practical credibility investments available.

Are 507 Calls Safe? Identifying Scams and Spoofed Numbers

The 507 area code is completely legitimate — used every day by hundreds of thousands of Minnesota residents, healthcare workers, university staff, and businesses. However, like all active US area codes, 507 numbers are occasionally exploited by scammers through neighbor spoofing — displaying a local-looking Minnesota number to increase the chance of the call being answered.

Scam Types Common to the 507 Region

• Healthcare and Medicare fraud — particularly prevalent near Rochester; callers impersonate medical billing offices, insurance companies, or pharmacy benefit managers requesting payment or patient information
• Agricultural loan scams — fraudulent calls targeting farmers in rural 507 counties, posing as lenders offering USDA loan relief or equipment financing
• Student loan and enrollment scams — common near Mankato, Winona, Northfield, and Marshall due to the high concentration of college students
• IRS and government impersonation — threatening calls claiming unpaid taxes or benefit overpayments, demanding immediate payment

How to Protect Yourself

• Let unknown 507 numbers go to voicemail — legitimate callers, especially from healthcare providers, always leave a verifiable message
• Never share Medicare numbers, Social Security information, or banking details with unsolicited callers
• If a caller claims to be from Mayo Clinic or another known institution, hang up and call that organization back directly on a number you find yourself
• Report suspicious 507 calls to the Federal Trade Commission's FTC fraud report service

Conclusion

The 507 area code connects a region that carries more weight than its rural geography might suggest — anchored by a world-renowned medical center, a network of universities, major agribusiness headquarters, and a Mississippi River corridor with deep historical roots. Created in 1954 and recently supplemented by the 924 overlay in 2024, the 507 area code has served southern Minnesota through more than seven decades of growth and change. Knowing its cities, counties, time zone, and the context behind every call puts you in a stronger position whether you're receiving a 507 number on your caller ID or reaching out to Minnesota contacts of your own. The 507 area code is southern Minnesota — and now you know it fully.

For any business looking to reach the Rochester healthcare market, Mankato's university economy, or the wider southern Minnesota agricultural corridor, a virtual 507 phone number gives you an immediate local identity at a fraction of the cost of a physical office. A recognized Rochester area code on your caller ID builds trust from the first ring — and in a market defined by medical precision and agricultural reliability, first impressions matter. Claim your 507 number today and start connecting with southern Minnesota on its own terms.