443 Area Code: Baltimore, Maryland
Area code 443 serves Baltimore, Annapolis and Towson, Maryland in the Eastern time zone, in service since 1997. Consumers have filed 6,212 unwanted-call complaints against 4,579 different 443 numbers, 558 of them with the FTC in the last 30 days. Look up the exact number that called you below.
Area code 443 at a glance
- State
- Maryland
- Main cities
- Baltimore, Annapolis, Towson, Columbia, Glen Burnie, Catonsville + 71 more
- Counties
- Baltimore County, Baltimore city, Anne Arundel County, Harford County + 12 more
- Local time
- —Eastern
- In service since
- June 1, 1997
- Overlay of
- 410
- Overlay code
- 667 (2012)
- Local dialing
- 10 digits (area code + number)
- Exchanges
- 81 rate centers, 785 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 443 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 443 numbers are about
1,699 FTC Do Not Call complaints about 443 numbers since Jul 24. The most common named subject is debt-relief pitches, at 12% of complaints (89% of those were recorded messages). Overall, 72% of callers who answered said the call was a robocall.
FTC complaint subjects
- Other / unspecified77045%
- Dropped call / no message21813%
- Debt reduction20812%
- Impostor (government, business, family)19211%
- No subject given1388%
- Home improvement & cleaning624%
- Medical & prescriptions412%
FCC complaints by call type, last 2 years
- Live Voice15246%
- Prerecorded Voice12337%
- Text Message5416%
16% of recent FCC complaints about 443 numbers are about text messages, not calls.
When 443 spam calls come in
30% of complaints that give a call time describe calls between 10am and 1pm. 91% came Monday to Friday, most on Wednesdays, 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?
605 FTC complaints about 443 numbers in the last four weeks, up 6% on the four weeks before. FCC complaints about 443 numbers peaked in 2018 (752); 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
62% of the FTC complaints about 443 numbers came from Maryland residents, but only 40% from people with 443 numbers themselves. The calls are mostly regional rather than aimed at 443 phones specifically.
Where complainants live
- Maryland1,05262%
- California553%
- Florida543%
- Pennsylvania392%
- Texas392%
What people with 443 numbers report
People whose own number starts with 443 filed 2,839 FTC complaints since Jul 24. 24% were about calls showing another 443 number. The most common named subject was debt-relief pitches.
Area codes on the calls they reported
- 443 (same code)68524%
- 877 (toll-free)1395%
- 833 (toll-free)1365%
- 866 (toll-free)1174%
- 888 (toll-free)1034%
Likely campaigns using 443 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 443 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.
| Prefix | Complaints | Numbers | Carrier | Exchange |
|---|---|---|---|---|
| (443) 227-xxxx | 82 | 74 | PAETEC (Windstream) | Port Deposit |
| (443) 464-xxxxcampaign | 21 | 20 | PAETEC (Windstream) | Churchville |
| (443) 731-xxxx | 19 | 18 | Teleport Communications America, LLC | Port Deposit |
| (443) 412-xxxx | 17 | 15 | Teleport Communications America, LLC | Churchville |
| (443) 637-xxxx | 15 | 14 | MCImetro (Verizon Business) | — |
Carriers operating in 443
NANPA has assigned 785 443 prefixes (NPA-NXX central-office codes) across 81 rate centers: 40% to wireless carriers, 60% to landline and VoIP operators; 89% are pooled blocks shared by several carriers. The newest assignment was 2023-11-21. 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 |
|---|---|---|---|---|
| PAETEC (Windstream) | Competitive / VoIP (CLEC) | 153(19%) | 68 | 2011-11-21 |
| Verizon Wireless (Cellco Partnership) | Wireless | 121(15%) | 19 | 2023-05-16 |
| Omnipoint Communications Cap Operations, LLC | Wireless | 94(12%) | 15 | 2015-01-21 |
| AT&T Mobility (New Cingular Wireless PCS) | Wireless | 71(9%) | 18 | 2018-11-19 |
| Level 3 (Lumen) | Competitive / VoIP (CLEC) | 69(9%) | 37 | 2014-06-13 |
| Verizon (landline) | Incumbent landline (ILEC) | 55(7%) | 28 | 2011-11-09 |
| Teleport Communications America, LLC | Competitive / VoIP (CLEC) | 48(6%) | 45 | 2004-11-01 |
| MCImetro (Verizon Business) | Competitive / VoIP (CLEC) | 46(6%) | 23 | 2013-01-21 |
| Core Communications, INC.- Md | Competitive / VoIP (CLEC) | 34(4%) | 32 | 2002-07-02 |
| Metro by T-Mobile (MetroPCS) | Wireless | 25(3%) | 17 | 2010-12-13 |
| Bandwidth.com | Competitive / VoIP (CLEC) | 18(2%) | 17 | 2014-04-04 |
| Onvoy (Sinch) | Competitive / VoIP (CLEC) | 14(2%) | 13 | 2011-10-07 |
Largest rate centers (exchanges) by prefixes: Baltimore (185), Annapolis (39), Towson (33), Columbia (31), Glen Burnie (26), Catonsville (22), Pikesville (21), Salisbury (20), Bel Air (19), Aberdeen (15). Source: NANPA Central Office Code Utilized Assignments (public, refreshed weekly).
What to do about calls from 443 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 443 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 Maryland
- 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: Maryland Attorney General.
- Maryland 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 443: questions answered from the data
Where is area code 443?
Area code 443 serves Baltimore, Annapolis and Towson, Maryland, covering Baltimore County, Baltimore city and Anne Arundel County and 13 more counties. It has been in service since June 1, 1997.
What time zone is area code 443 in?
Area code 443 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 443?
667 (in service 2012) serves the same area as 443. 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 443 numbers usually about?
Since Jul 24, consumers filed 1,699 FTC Do Not Call complaints about 443 numbers. The most common named subject was debt-relief pitches: 12% of complaints, 89% of them recorded messages. Across all subjects, 72% of callers who answered the question said the call was a robocall.
When do 443 spam calls happen?
30% of the complaints that give a call time describe calls between 10am and 1pm, and 91% came on weekdays, most often on Wednesday. Times are as consumers reported them.
Are calls from 443 numbers really local?
Not necessarily. 62% of the FTC complaints about 443 numbers came from Maryland residents, but only 40% from people with 443 numbers themselves. The calls are mostly regional rather than aimed at 443 phones specifically.
Are 443 robocalls increasing?
In the four weeks to Oct 15, consumers filed 605 FTC complaints about 443 numbers, 6% more than the four weeks before.
How do I report a 443 scam call in Maryland?
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 Maryland, the Maryland Attorney General also handles consumer complaints about scam calls. Reports feed the public data this page is built from.
Overlay and nearby 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.