Skip to content
Before You Call Back

Area code 443

Area code 443 serves Maryland, including Baltimore, Annapolis and Towson (Eastern time). It has been in service since June 1, 1997 and shares its area with 410 and 667.

Numbers starting with 443 drew 1,851 reports to the FTC from Aug 14, 2026 to Nov 11, 2026 and 970 complaints to the FCC since November 2023. The number on your screen can be faked, so a 443 number proves nothing about where a call came from.

Location
Maryland(washington-Arlington-Alexandria, DC-VA-MD-WV Metroploitan Statistical Area) and Baltimore-Columbia-Towson, MD Metropolitan Statistical Area
Time zone
Eastern
In service since
June 1, 1997Created from 410
Overlay
Same area as 410, 667
Local calls
Dial 10 digitsArea code needed, even next door
Exchanges in use
785 of 792held by 26 carriers
Projected to run out
4Q 2036NANPA forecast 2026.2

Complaints about 443 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 443. These are counts of what people reported; the agencies do not verify them.

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

1,851

FCC complaints since November 2023

970

Different 443 numbers reported

2,401

FCC complaints naming a 443 number, by month

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

Show as a table
MonthComplaints
November 202327
December 202316
January 202420
February 202455
March 202438
April 202430
May 202442
June 202471
July 202453
August 202422
September 202429
October 202432
November 202428
December 202418
January 202557
February 202531
March 202531
April 202522
May 202526
June 202513
July 202519
August 202527
September 202519
October 20250
November 20259
December 202525
January 202613
February 202612
March 20269
April 202617
May 202615
June 202619
July 202626
August 202625
September 202623
October 202638

What people said 443 calls were about

Subjects picked in FTC reports, August 14, 2026 to November 11, 2026. 1,204 of 1,851 reports were robocalls.

Show as a table
SubjectReports
Other851
Reducing your debt (credit cards, mortgage, student loans)234
Dropped call or no message232
Calls pretending to be government, businesses, or family and friends188
Home improvement and cleaning72
Medical and prescriptions38

Most reported 443 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 443

NANPA lists 81 rate centers for 443. 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.
  • Baltimore185
  • Annapolis39
  • Towson33
  • Columbia31
  • Glen Burnie26
  • Catonsville22
  • Pikesville21
  • Salisbury20
  • Bel Air19
  • Aberdeen15
  • Westminster15
  • Cockeysville14
  • Elkton14
  • Essex14
  • Parkville14
  • Woodlawn13
  • Arbutus10
  • Dundalk10
  • Fallston10
  • Severna Park10
  • Easton9
  • Edgewood9
  • Elkridge9
  • Ellicott City9
Show all 81 rate centers

Prince Frederick, Randallstown, Severn, Sykesville, Armiger-Gibson Island, Reisterstown, Waterloo 238, Brooklyn Park Linthicum, Cambridge, Chase, Sparrows Point, Waterloo 236, Fork, Hampstead, North East, Odenton, Cardiff, Chestertown, Churchville, Crofton, Delmar, Havre De Grace, Jarrettsville, Millersville, North Beach, Perryville, Sparks Glencoe, West River, Worthington, Glenwood, New Windsor, Ocean City, Parkton, Port Deposit, Silver Run, Taneytown, Berlin, Centreville, Darlington, Pocomoke, Princess Anne, Sherwood Forest, Solomons, Union Bridge, Bishopville, Chesapeake City, Crisfield, Denton, Federalsburg, Nanticoke, Queenstown, Sharptown, Snow Hill, Stevensville, Trappe, Vienna, Willards.

Phone companies holding 443 exchanges

Each exchange (the three digits after the area code) is assigned to one carrier. 89% 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 26 carriers

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

Show as a table
Carrier (legal name)Exchanges
Paetec Itel, LLC153
Cellco Partnership dba Verizon Wireless - MD121
Omnipoint Communications Cap Operations, LLC94
New Cingular Wireless PCS, LLC - DC71
Level 3 Communications, LLC - MD69
Verizon Maryland, Inc.55
Teleport Communications America, LLC - MD48
Mcimetro Access Transmission Services LLC46

When today's 443 exchanges were assigned

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

Show as a table
YearExchanges
200188
200214
20032
200411
200512
200625
200719
200817
200925
201015
201151
20128
20132
20145
20151
20171
20181
20232

Check a 443 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 Maryland

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