Rochester, the largest city in southern Minnesota and home to the Mayo Clinic, is served by area code 507. If you’re calling a Rochester number, relocating to the region, or checking an unknown caller, this guide covers the area codes that serve the city, local dialing rules, the ZIP codes involved, and the scam calls residents most often encounter.
Rochester Area Codes at a Glance
| Detail | Information |
|---|---|
| Primary Area Code | 507 |
| Overlay Codes | None currently active |
| Time Zone | Central Time (CST/CDT, UTC−6 / UTC−5) |
| Major County | Olmsted County |
| State | Minnesota |
Area Code Breakdown & Neighborhood Mapping
Area code 507 is the regional code for all of southern Minnesota, and Rochester is its largest city. Unlike the Twin Cities, southern Minnesota has never needed to split 507 into multiple codes, so a single area code covers a wide swath of the state’s southern tier.
Rochester & Olmsted County
Every part of Rochester falls under 507: Downtown and the Mayo Clinic campus, the Northwest and Northeast sides, the Southeast and Southwest quadrants, and surrounding Olmsted County communities such as Byron, Stewartville, and Chatfield.
Greater Southern Minnesota vs. the Metro
The 507 code also serves other southern-Minnesota hubs including Mankato, Winona, Owatonna, Austin, and Worthington. To the north, the Twin Cities metro uses 612 (Minneapolis), 651 (Saint Paul), 763, and 952. Central Minnesota around St. Cloud uses 320, and the north uses 218 (Duluth).
Local Dialing Rules & International Calling
Minnesota requires 10-digit dialing statewide. Always dial 507 plus the seven-digit number, even for local calls within Rochester. For domestic long distance, add a leading 1 (1 + 507 + number). To reach Rochester from another country, dial your exit code, then the U.S. country code +1, then 507 and the local number. Mobile users can enter +1 507 directly.
Major ZIP Codes in Rochester
Rochester ZIP codes fall in the 55901–55906 range. Common examples include 55901 (northwest and central Rochester), 55902 (southwest, including much of the retail corridor), 55904 (southeast), and 55906 (northeast). The Mayo Clinic and downtown institutions also use dedicated 55905 addressing, and P.O. ranges extend into the 55900s.
Cell Phones & Number Portability
Thanks to federal number portability, a 507 number no longer guarantees the caller is currently in Rochester or southern Minnesota. Rochester’s large medical and student population means many residents keep phone numbers from other regions, and people who leave the area often hold onto their 507 mobile line. When you activate new service locally, carriers usually issue a 507 number, but the safest habit is to dial all ten digits for every call and to judge a caller by who they are rather than by the area code alone.
Spam & Scam Call Warnings in Rochester
Rochester residents report robocall patterns common across greater Minnesota, sometimes tied to the city’s large healthcare workforce. Watch for:
- Neighbor spoofing: Scam calls faking a 507 prefix to look local. Screen unfamiliar numbers even when the area code matches.
- Fake health-plan and Medicare calls: Given the Mayo Clinic’s presence, robocalls pushing bogus insurance or prescription “verification” are common.
- Utility and government impersonation: Callers posing as the power company, the IRS, Social Security, or Olmsted County demanding urgent gift-card or wire payments.
- Auto-warranty robocalls: High-volume automated pitches seeking personal details.
Let unknown calls go to voicemail, never pay or share information under pressure, and report unwanted calls to the FTC at reportfraud.ftc.gov.
Frequently Asked Questions
What area code does Rochester, MN use?
Rochester uses area code 507, the regional code for all of southern Minnesota.
Does Rochester have more than one area code?
No. 507 has never been split or overlaid, so it is the only area code serving Rochester and the surrounding region.
Do I need to dial the area code for local calls?
Yes. Minnesota uses mandatory 10-digit dialing, so include 507 even within Rochester.
What time zone is Rochester in?
Rochester observes Central Time (CST in winter, CDT in summer).
How do I call Rochester from abroad?
Dial your country’s exit code, then +1, then 507 and the seven-digit local number.
Stay Safe & Explore More
- Verify an unknown caller in our Scam Alerts directory.
- Comparing nationwide numbers? See our Toll-Free Numbers guides.