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Before You Call Back

Area code 313

Area code 313 serves Michigan, including Detroit Zone 05, Detroit Zone 06 and Detroit Zone 01 (Eastern time). It has been in service since January 1, 1947 and shares its area with 679.

Numbers starting with 313 drew 1,559 reports to the FTC from Aug 14, 2026 to Nov 11, 2026 and 772 complaints to the FCC since November 2023. The number on your screen can be faked, so a 313 number proves nothing about where a call came from.

Location
MichiganDetroit-Warren-Dearborn, MI Metropolitan Statistical Area
Time zone
Eastern
In service since
January 1, 1947Created from 313
Overlay
Same area as 679
Local calls
Dial 10 digitsArea code needed, even next door
Exchanges in use
769 of 792held by 35 carriers
Projected to run out
3Q 2086NANPA forecast 2026.2

Complaints about 313 numbers

Reports where the number on the consumer's caller ID (or, for the FCC, the number the caller asked them to call back) starts with 313. These are counts of what people reported; the agencies do not verify them.

FTC reports, Aug 14, 2026 to Nov 11, 2026

1,559

FCC complaints since November 2023

772

Different 313 numbers reported

2,048

FCC complaints naming a 313 number, by month

November 2023 to October 2026. Source: FCC Consumer Complaints Data.

Show as a table
MonthComplaints
November 202316
December 202314
January 202416
February 20245
March 202421
April 202418
May 202419
June 202411
July 202427
August 202430
September 202427
October 202434
November 202425
December 202412
January 202512
February 202519
March 202515
April 202521
May 202521
June 202527
July 202517
August 202525
September 202516
October 20253
November 20259
December 202520
January 202618
February 20267
March 202628
April 202613
May 202620
June 202628
July 202626
August 202630
September 202646
October 202654

What people said 313 calls were about

Subjects picked in FTC reports, August 14, 2026 to November 11, 2026. 962 of 1,559 reports were robocalls.

Show as a table
SubjectReports
Other693
Reducing your debt (credit cards, mortgage, student loans)295
Calls pretending to be government, businesses, or family and friends197
Dropped call or no message113
Medical and prescriptions79
Warranties and protection plans22

Most reported 313 numbers

Numbers with at least five reports from three or more places in the last twelve months. Many of them are likely spoofed.

Places served by 313

NANPA lists 6 rate centers for 313. A rate center is the town or district a block of numbers is tied to for billing; sorted here by how many exchanges each holds.
  • Detroit Zone 05272
  • Detroit Zone 06155
  • Detroit Zone 01152
  • Detroit Zone 0471
  • Detroit Zone 0269
  • Detroit Zone 0350

Phone companies holding 313 exchanges

Each exchange (the three digits after the area code) is assigned to one carrier. 63% of these exchanges are pooled: their numbers are handed out in blocks of 1,000 to other carriers, so the holder below is not always the company serving a given number.

Exchanges held, top 8 of 35 carriers

NANPA central office code assignments, file of November 11, 2026.

Show as a table
Carrier (legal name)Exchanges
Michigan Bell Tel CO244
Omnipoint Communications Midwest Operations, LLC141
New Cingular Wireless PCS, LLC - IL95
Cellco Partnership dba Verizon Wireless - MI54
Bandwidth.com CLEC, LLC - MI28
Mcimetro Access Transmission Services LLC - MI25
Onvoy, Llcv - MI25
American Messaging Services, LLC24

When today's 313 exchanges were assigned

Exchanges still assigned, by year of assignment. Exchanges returned since are not counted.

Show as a table
YearExchanges
20018
20021
20042
20053
20063
20071
20084
20095
201010
20117
201210
201319
201412
201518
20168
20173
20188
201910
202015
202119
202213
202310
202411
202513
202610

Check a 313 number

A check shows the carrier and rate center of the number's exchange and every FTC and FCC report about that exact number. Why the number on screen can be fake.

Other area codes in Michigan

NANPA area code database and central office code file of November 11, 2026; FCC complaints November 1, 2023 to November 11, 2026; FTC reports August 14, 2026 to November 11, 2026. How the data is used.

Official sources (7)Show