313 Area Code: Detroit, Michigan
Area code 313 serves Detroit, Michigan in the Eastern time zone, in service since 1947. Consumers have filed 4,611 unwanted-call complaints against 3,359 different 313 numbers, 532 of them with the FTC in the last 30 days. Look up the exact number that called you below.
Area code 313 at a glance
- State
- Michigan
- Main cities
- Detroit
- County
- Wayne County
- Local time
- —Eastern
- In service since
- 1947
- Overlay of
- 313
- Overlay code
- 679 (2025)
- Local dialing
- 10 digits (area code + number)
- Exchanges
- 6 rate centers, 769 prefixes
Sources: NANPA area code and central office code records (refreshed weekly); cities and counties matched from US Census Bureau and USGS place names.
Most-reported 313 numbers
Ranked by FTC Do Not Call complaints this month, then all-time FTC and FCC complaints. Only numbers with enough complaints for a full report page are listed. Click one for what it was reported for and where.
What calls from 313 numbers are about
1,526 FTC Do Not Call complaints about 313 numbers since Jul 24. The most common named subject is debt-relief pitches, at 20% of complaints (87% of those were recorded messages). Overall, 68% of callers who answered said the call was a robocall.
FTC complaint subjects
- Other / unspecified66444%
- Debt reduction30820%
- Impostor (government, business, family)22915%
- Dropped call / no message1067%
- No subject given886%
- Medical & prescriptions533%
- Warranties & protection plans171%
FCC complaints by call type, last 2 years
- Live Voice13346%
- Text Message8831%
- Prerecorded Voice6623%
31% of recent FCC complaints about 313 numbers are about text messages, not calls.
When 313 spam calls come in
29% of complaints that give a call time describe calls between 11am and 2pm. 90% came Monday to Friday, most on Tuesdays, the pattern of call-center robocall campaigns that run on business hours. Times are as consumers reported them to the FTC.
By hour of the day
By day of the week
Is it getting worse?
524 FTC complaints about 313 numbers in the last four weeks, up 11% on the four weeks before. FCC complaints about 313 numbers peaked in 2016 (552); the FTC's daily Do Not Call data has carried most of the volume since mid-2026.
FTC complaints per week
FCC complaints per year
Years shown as '15 to '26; the current year is partial.
Who gets these calls
57% of the FTC complaints about 313 numbers came from Michigan residents, but only 32% from people with 313 numbers themselves. The calls are mostly regional rather than aimed at 313 phones specifically.
Where complainants live
- Michigan87757%
- Florida695%
- California654%
- Texas554%
- Illinois463%
What people with 313 numbers report
People whose own number starts with 313 filed 2,250 FTC complaints since Jul 24. 22% were about calls showing another 313 number. The most common named subject was debt-relief pitches.
Area codes on the calls they reported
- 313 (same code)48822%
- 833 (toll-free)1346%
- 877 (toll-free)944%
- 888 (toll-free)884%
- 855 (toll-free)874%
Likely campaigns using 313 numbers
Groups of numbers that drew the same FTC complaint in the same pattern over the last 60 days. The grouping is statistical and doesn't identify who is calling.
Busiest 313 prefixes this month
FTC complaints in the last 30 days, grouped by the first six digits. When one prefix collects complaints about many different numbers, a campaign is usually cycling through that block. The carrier is who NANPA assigned the prefix to, not who made the calls.
Carriers operating in 313
NANPA has assigned 769 313 prefixes (NPA-NXX central-office codes) across 6 rate centers: 45% to wireless carriers, 55% to landline and VoIP operators; 63% are pooled blocks shared by several carriers. 11 prefixes were assigned in the last 12 months (newest 2026-05-27). The carrier holding a prefix is who the number was issued through. It says nothing about who is calling, since caller ID is routinely spoofed.
| Carrier | Type | Prefixes | Rate centers | Newest assignment |
|---|---|---|---|---|
| Ameritech (AT&T) | Incumbent landline (ILEC) | 244(32%) | 6 | 2013-10-24 |
| Omnipoint Communications Midwest Operations, LLC | Wireless | 141(18%) | 6 | 2024-10-02 |
| AT&T Mobility (New Cingular Wireless PCS) | Wireless | 95(12%) | 2 | 2026-05-27 |
| Verizon Wireless (Cellco Partnership) | Wireless | 54(7%) | 1 | 2026-01-07 |
| Bandwidth.com | Competitive / VoIP (CLEC) | 28(4%) | 6 | 2022-10-17 |
| MCImetro (Verizon Business) | Competitive / VoIP (CLEC) | 25(3%) | 6 | 2013-05-13 |
| Onvoy (Sinch) | Competitive / VoIP (CLEC) | 25(3%) | 6 | 2025-11-20 |
| American Messaging Services, LLC | Wireless | 24(3%) | 4 | — |
| Level 3 (Lumen) | Competitive / VoIP (CLEC) | 22(3%) | 6 | 2020-08-19 |
| Teleport Communications America, LLC | Competitive / VoIP (CLEC) | 18(2%) | 6 | 2021-11-18 |
| Metro by T-Mobile (MetroPCS) | Wireless | 15(2%) | 6 | 2025-03-06 |
| PAETEC (Windstream) | Competitive / VoIP (CLEC) | 15(2%) | 6 | 2009-10-16 |
Source: NANPA Central Office Code Utilized Assignments (public, refreshed weekly).
What to do about calls from 313 numbers
Before you call back
- Debt reduction is the top named complaint here. Don't pay upfront fees for debt relief; the FTC's Telemarketing Sales Rule bans them. Talk to your lender or a nonprofit credit counselor instead. Read about debt-relief robocalls.
- Look up the full number above. A missed call from 313 with no voicemail is usually a robocall; anyone who needs you will leave a message.
- Block repeat callers: iPhone, Android, or your carrier's free filter (Verizon, AT&T, T-Mobile).
Report it in Michigan
- Unwanted sales calls and robocalls: donotcall.gov (FTC). Scams and fraud: ReportFraud.ftc.gov.
- Spoofing, texts and call-blocking problems: FCC consumer complaints.
- State complaints: Michigan Attorney General.
- Michigan formally adopted the FTC's National Do Not Call Registry as its own state list rather than running a separate one, so a single free registration at donotcall.gov covers you. State authorities can still enforce against telemarketers who ignore it, in addition to any federal penalty.
Your FTC and FCC reports are published (without your name or number) in the datasets this page is built from. How to report unwanted calls.
Area code 313: questions answered from the data
Where is area code 313?
Area code 313 serves Detroit, Michigan, covering Wayne County. It has been in service since 1947.
What time zone is area code 313 in?
Area code 313 is in the Eastern time zone (UTC−5, or UTC−4 during daylight saving time). The current local time is shown at the top of this page.
Which area codes overlay 313?
679 (in service 2025) serves the same area as 313. New numbers there can be issued with any of these codes, and local calls need all 10 digits. A spoofed call can display any of them.
What are calls from 313 numbers usually about?
Since Jul 24, consumers filed 1,526 FTC Do Not Call complaints about 313 numbers. The most common named subject was debt-relief pitches: 20% of complaints, 87% of them recorded messages. Across all subjects, 68% of callers who answered the question said the call was a robocall.
When do 313 spam calls happen?
29% of the complaints that give a call time describe calls between 11am and 2pm, and 90% came on weekdays, most often on Tuesday. Times are as consumers reported them.
Are calls from 313 numbers really local?
Not necessarily. 57% of the FTC complaints about 313 numbers came from Michigan residents, but only 32% from people with 313 numbers themselves. The calls are mostly regional rather than aimed at 313 phones specifically.
Are 313 robocalls increasing?
In the four weeks to Oct 20, consumers filed 524 FTC complaints about 313 numbers, 11% more than the four weeks before.
How do I report a 313 scam call in Michigan?
Report unwanted sales calls and robocalls to the FTC at donotcall.gov, and scams to ReportFraud.ftc.gov. The FCC takes complaints at consumercomplaints.fcc.gov. In Michigan, the Michigan Attorney General also handles consumer complaints about scam calls. Reports feed the public data this page is built from.
Other Michigan area codes
Sources: FTC Do Not Call complaints (unverified consumer reports), published every weekday and available here from Jul 24; FCC Consumer Complaint Data, public record, imported nightly; NANPA numbering records. A number appearing here means consumers reported calls that displayed it. Caller ID can be spoofed.