Quick answer
The 248 area code serves Troy, Michigan in the Eastern Time (ET) (). Assigned in 1997, it covers Oakland County Michigan including Troy, Pontiac, Auburn Hills. Overlay code: 947.
- Region
- Oakland County Michigan, MI
- Time zone
- ET ()
- Assigned
- 1997
- Population
- ~1,400,000
- Local time now
- · live
Where is area code 248?
The 248 area code is a North American Numbering Plan geographic code serving Troy and the surrounding Oakland County Michigan region in Michigan. Assigned by the North American Numbering Plan Administration in 1997, it currently serves approximately 1,400,000 residents on the Eastern Time (ET) (). It shares geography with overlay code 947.
Cities served by the 248 area code
The 248 area code covers 5 major cities and towns across the Oakland County Michigan region:
| City | State |
|---|---|
| Troy | MI |
| Pontiac | MI |
| Auburn Hills | MI |
| Southfield | MI |
| Royal Oak | MI |
Businesses across Troy and surrounding cities use 248 numbers to project local presence and lift call answer rates. Industry studies of local presence dialing consistently report answer-rate gains of 20–40% over toll-free or out-of-area numbers — a caller ID that matches the recipient's region looks familiar and gets picked up.
248 area code time zone and business hours
The 248 area code is in the Eastern Time (ET) zone (). Standard business hours in 248 run 9 AM to 5 PM ET.
If you're calling into 248 from a different time zone, factor in the offset. For example, an Eastern Time business calling 248 at 9 AM ET reaches Troy at local time — likely outside standard business hours.
History of the 248 area code
The 248 area code was introduced in 1997 when the North American Numbering Plan was first deployed. As Troy grew and number demand increased, overlay code 947 was added to serve the same geographic region — a common solution that avoids forcing existing subscribers to change their numbers.
Is the 248 area code safe? Spam and scam calls
248 is a legitimate geographic area code for Troy — it is not a scam code or a premium-rate prefix, and a call from a 248 number is most likely a genuine local caller. The risk is not the area code itself but a tactic called neighbor spoofing: scammers fake their caller ID so an unwanted call appears to come from your own area code, because people answer familiar numbers more readily.
If you get an unexpected 248 call, a few signals point to a likely scam — a pre-recorded message, urgent pressure to act now, a demand for payment by gift card or wire transfer, or anyone asking for passwords, Social Security, or account numbers. Let suspicious calls go to voicemail, never share personal information, and report fraud to the FTC at reportfraud.ftc.gov. The FCC consumer guide on spoofing explains your rights under the Truth in Caller ID Act. A real Troy business will leave a clear voicemail and will not pressure you.
US carriers verify caller ID with the STIR/SHAKEN framework, which flags many spoofed numbers as "Spam Likely" before they ring. DialPhone 248 numbers are registered for STIR/SHAKEN attestation, so calls from your business are verified as genuine and reach customers without a false spam label. See the DialPhone guide to VoIP security for more.
Why get a 248 area code number for your business?
Getting a 248 number gives your business three measurable advantages over a toll-free or out-of-area number:
- Local trust signal. Customers in Troy recognize 248 as their home area code. Caller ID matching builds immediate credibility for service businesses, sales outreach, and patient communication.
- Higher answer rate. Calls from a familiar local area code are answered far more often than unknown or toll-free numbers — industry measurements of local presence dialing put the lift at 20–40%, which matters most for outbound sales, appointment confirmations, and time-sensitive service callbacks.
- Targeted marketing. Businesses serving Troy and the broader Oakland County Michigan can advertise a local number across print, radio, billboards, and digital channels for higher conversion than a national 800 number.
For businesses in Troy and surrounding cities, top industries that benefit from local 248 presence include Professional Services, Healthcare, and Retail. DialPhone's AI receptionist is available for every 248 number — never miss a call, even after standard business hours.
How to get a 248 area code number
Setting up a 248 business number with DialPhone takes under 10 minutes:
- Sign up for a DialPhone plan. Choose any plan starting at $24/user/month. Free 14-day trial, no credit card required.
- Search available 248 numbers. Filter the DialPhone number inventory by area code, city, or pattern.
- Choose your number and configure. Assign your new 248 number to a user or team, set up call routing, voicemail, AI receptionist, and business SMS.
- Port your existing number (optional). Already have a 248 number? Free number porting in 2 to 5 business days with zero service interruption.
New to local numbers? The complete guide to getting a local phone number covers choosing the right area code, porting an existing line, and avoiding spam flags.
248 area code overlay codes
The Oakland County Michigan region is served by multiple overlay area codes:
| Area Code | Coverage |
|---|---|
| 248 | Primary area code for Oakland County Michigan, assigned 1997 |
| 947 | Overlay — same geography (assigned 2013) |
All overlay codes serve the same Troy region. New subscribers may be assigned any available code; existing numbers retain their original prefix.
AI receptionist for 248 area code businesses
Every DialPhone 248 number includes optional AI receptionist coverage, available 24/7. The AI handles calls when your team is unavailable — answering common questions, booking appointments, routing urgent callers to on-call staff, and capturing voicemail with full transcription and intent tagging.
For businesses in Troy that handle high call volume, run extended hours, or need bilingual support (especially valuable in service areas with diverse customer bases), the AI receptionist reduces voicemail backlog and improves first-call resolution.
All area codes in Michigan
Michigan has 11 active geographic area codes. The 248 area code is part of the same numbering plan as the codes listed below — calls between them are typically local within the state, depending on the carrier.
Nearby area codes
Related area codes in Michigan and the Eastern Time (ET) region:
- 231 area code — Muskegon, Michigan
- 269 area code — Kalamazoo, Michigan
- 313 area code — Detroit, Michigan
- 517 area code — Lansing, Michigan
- 616 area code — Grand Rapids, Michigan
- 734 area code — Ann Arbor, Michigan
All Michigan area codes → · Browse all US area codes →
More area codes: ← 240 Rockville · 251 Mobile →
How We Tested
DialPhone re-verifies every area code page every 90 days. Area code geography, timezone, and overlay data come from the official North American Numbering Plan Administration (NANPA) database. Pricing reflects the published DialPhone plan tiers — see the pricing page for current details. Number availability varies; check the DialPhone signup flow for live inventory in the 248 region.
What We Don't Like
- Number availability is finite. Popular Troy area codes can be inventory-constrained — request specific vanity patterns early.
- Porting timing varies. Most 248 ports complete in 2-5 business days; complex multi-line legacy contracts can take 7-10.
- HIPAA tier required for healthcare. The Core $24 plan doesn't include a BAA — healthcare users need Advanced ($34) or above.