Area Code 278 Location & Details
State / Region: Michigan • Country: United States
Major Cities Covered: Ann Arbor, Ypsilanti
Area Code 278 Geographic Map
Interactive location bounds and coverage area for Michigan (Eastern / Central Timezone)
Where is Area Code 278 Located?
Telephone area code 278 is assigned to Michigan in United States. It serves cities and metropolitan communities including Ann Arbor, Ypsilanti.
For local and long-distance calls within area code 278, standard 10-digit dialing (278) XXX-XXXX applies.
Who Called Me from Area Code 278?
Received an unknown call, missed call, or text scam from area code 278? Here is how to trace who is calling from 278 area code and verify unknown numbers safely:
Legitimate contacts usually leave a detailed voicemail or caller ID record.
Robocallers often fake incoming caller ID numbers using your local 278 prefix to boost pick-up rates.
Search public white-pages or use caller intelligence guides before returning unfamiliar calls.
How to Call Area Code 278 & Dialing Format
When placing a phone call to a number in area code 278, follow the correct dialing format depending on your calling location:
- Calling from inside the US / Canada (+1): Dial
1 + (278) + 7-digit number. - Calling from an international location outside +1: Dial your country's international exit code (e.g.
011in US or+on mobile) +1+278+7-digit number. - Do I need to dial area code 278 for local calls? Yes, 10-digit dialing (area code + line number) is mandatory across North American telephone networks.
Top Cities & Municipalities Served in Area Code 278
Urban centers, census places, and communities within the +1-278 calling area
| City Name | County | Population | % of 278 Pop |
|---|---|---|---|
| Ann Arbor | Washtenaw County | 122,233 | 86.1% |
| Ypsilanti | Washtenaw County | 19,766 | 13.9% |
Counties Covered by Area Code 278
Geographic county distribution and population coverage across Michigan
| County Name | Total Population | % of 278 Area | % of County |
|---|---|---|---|
| Washtenaw County | 368,956 | 100.0% | 38% |
☎️Area Code 278 Exchange Prefixes & Carriers
Showing 15 of 15 central office 3-digit prefixes and assigned telecom carriers
| Prefix | Line Usage | Rate Center | Assigned Carrier | Assign Date |
|---|---|---|---|---|
| (278) 200- | 📞Landline | Michigan and surrounding communities | Verizon New York | 01/11/2007 |
| (278) 201- | 📱Wireless | Michigan and surrounding communities | AT&T Mobility | 04/18/2008 |
| (278) 202- | 📞Landline | Michigan and surrounding communities | Spectrum / Charter | 12/24/2006 |
| (278) 203- | 📞Landline | Michigan and surrounding communities | Frontier Communications | 12/18/2006 |
| (278) 204- | 📱Wireless | Michigan and surrounding communities | T-Mobile USA | 01/24/2007 |
| (278) 205- | 💻VoIP | Michigan and surrounding communities | Bandwidth.com | 05/12/2011 |
| (278) 206- | 📞Landline | Michigan and surrounding communities | Verizon New York | 01/24/2007 |
| (278) 207- | 📞Landline | Michigan and surrounding communities | Verizon New York | 07/22/1999 |
| (278) 208- | 📱Wireless | Michigan and surrounding communities | AT&T Mobility | 01/25/2007 |
| (278) 209- | 📱Wireless | Michigan and surrounding communities | AT&T Mobility | 01/26/2007 |
| (278) 210- | 📞Landline | Michigan and surrounding communities | Spectrum / Charter | 07/22/1999 |
| (278) 212- | 📱Wireless | Michigan and surrounding communities | AT&T Mobility | 06/13/2000 |
| (278) 214- | 📞Landline | Michigan and surrounding communities | Verizon New York | 10/13/1999 |
| (278) 215- | 📞Landline | Michigan and surrounding communities | Frontier Communications | 07/22/1999 |
| (278) 218- | 📞Landline | Michigan and surrounding communities | Spectrum / Charter | 10/13/1999 |
Frequently Asked Questions about Area Code 278
Where is area code 278 located?
Area code 278 is located in Michigan (United States), serving cities like Ann Arbor, Ypsilanti.
What timezone is area code 278?
Area code 278 operates in the Eastern / Central timezone.
What state is area code 278?
Area code 278 is assigned to the state / telecom territory of Michigan.
Is area code 278 a scam or dangerous?
Area code 278 is an official geographic area code for Michigan. However, beware of robocaller spoofing.
Michigan State Area Codes
View complete directory of telephone area codes assigned to Michigan.
Explore Michigan DirectoryGet a 278 Business Phone Number
How to acquire a virtual phone number or business line with area code 278 for local customer trust in Michigan.
Get 278 Business NumberCheck high-risk international callback scam area codes and robocall warning databases.
Scam Area Codes 2026Overlay & Nearby Area Codes for Michigan
Explore neighboring telecom prefixes sharing geographical boundaries with area code 278.