Unwanted sales calls can continue even after you block several numbers. Some come from legitimate businesses that must follow telemarketing rules, while others come from scammers who ignore the law and disguise their caller ID information.
No single step will stop every call. However, registering your number, withdrawing permission, using call-blocking tools, and reporting violations can reduce interruptions and give regulators useful information.
Register With the National Do Not Call Registry
You can add a personal home or mobile number to the federal National Do Not Call Registry at DoNotCall.gov or by calling 1-888-382-1222 from the number you want to register. Registration is free.
If you register online, you must click the confirmation link sent by email within 72 hours. According to the Federal Trade Commission’s Do Not Call Registry guidance, your number should appear on the registry the following day, but covered sales calls may take as long as 31 days to stop.
Registrations do not expire. A number is generally removed only when it is disconnected and reassigned or when the consumer requests its removal.
Avoid websites that charge a fee to register your number. The official service is free.
Understand What the Registry Does—and Does Not Do
The registry tells law-abiding telemarketers not to place covered sales calls to registered numbers. It does not work like a technical call blocker, and it cannot physically prevent someone from dialing your number.
It also does not cover every type of call. Under federal rules, calls that may still be allowed include:
Political calls
Certain charitable solicitations
Surveys that do not include a sales pitch
Debt-collection calls
Purely informational calls, such as appointment reminders
Calls from a company when you gave written permission to receive them
Certain calls based on a recent business relationship
A call that begins as a survey or informational message may still be considered telemarketing if it includes a sales pitch.
The rules contain details and exceptions, and additional state restrictions may apply. Being registered also will not stop scammers who deliberately disregard the law.
Tell Individual Companies to Stop Calling
If a company you recognize continues calling, clearly state:
Place this number on your company-specific do-not-call list. I do not consent to further sales calls.
Write down the company’s name, the date and time, the caller ID number, and the number called. If the company claims that you gave permission, ask when and how that consent was obtained.
A business relationship does not give a company unlimited permission to keep calling. The FTC explains that even when a company may initially call because you recently did business with it, it must stop covered sales calls after you make a company-specific do-not-call request.
For automated calls or texts that depend on your consent, FCC rules generally allow you to withdraw that consent through a reasonable method. Depending on the communication, that could include using the provided opt-out mechanism, replying “STOP,” submitting an online request, or directly telling the caller to stop.
Keep a screenshot or written record of the request. Under current FCC rules, callers generally must honor covered consent-revocation and do-not-call requests within a reasonable period not exceeding 10 business days.
Be Careful With Suspicious Robocalls
A prerecorded message trying to sell something is generally unlawful unless the company has the required written permission or the call falls within a recognized exception.
When an unfamiliar robocall asks you to press a number to stop future calls, the FTC recommends hanging up instead. Pressing a button or speaking with an operator may confirm that the number is active.
Do not provide account numbers, passwords, Social Security numbers, verification codes, or payment information to an unexpected caller. If the caller claims to represent a bank, government office, utility, or other organization, end the call and contact that organization through a verified number from its official website, your account statement, or the back of your card.
Caller ID is not proof of identity. Scammers can use spoofing technology to display a false number or a number with your local area code.
Use Blocking and Call-Labeling Tools
Most mobile phones allow users to block individual numbers or silence calls from unknown callers. Wireless carriers may also offer free or paid tools that identify suspected spam and automatically block certain calls.
Because scammers frequently change or spoof numbers, blocking calls individually may have limited value. Carrier-level spam filtering and call-labeling can be more useful when calls arrive from many different numbers.
Before installing a third-party blocking app, review:
Its cost and cancellation terms
What phone and contact data it collects
Whether it shares information with advertisers
How it identifies and handles legitimate calls
Whether blocked calls can still leave voicemail
Aggressive blocking may affect calls from medical offices, schools, delivery drivers, employers, or other legitimate callers. Check the blocked-call list periodically.
Keep Useful Details About Repeated Calls
A short call log makes reports more useful. Record:
The date and time of each call
The number shown on caller ID
Any callback number provided
The company or product mentioned
Whether the call used a prerecorded or artificial voice
Whether you previously asked the caller to stop
Whether your number had been on the registry for at least 31 days
Any money or personal information you provided
Caller ID may be false, but you should still include the displayed number when filing a report. Regulators and phone providers can compare information across many complaints.
Report Unwanted Sales Calls to the FTC
If your number has been registered for at least 31 days and you receive a covered telemarketing call, report it through DoNotCall.gov.
The FTC requests the number that received the call, the number displayed on caller ID, any callback number, and the date and time of the call when available.
If you lost money, shared sensitive information, or have details about a suspected scam, submit a report at ReportFraud.ftc.gov. A fraud report is different from a basic unwanted-call report.
The FTC usually does not respond individually to each report. It uses complaint information to identify patterns, support investigations, and help phone providers improve call-labeling and blocking systems.
File an FCC Complaint When Appropriate
The Federal Communications Commission accepts complaints involving unwanted calls or texts, robocalls, spoofing, and related telephone issues through its Consumer Complaint Center.
An FCC complaint does not guarantee that the agency will resolve an individual unwanted-call problem. Complaints can provide evidence for enforcement and policy work.
If your own number is being displayed on calls you did not make, use the FCC complaint option for number spoofing. Tell your carrier as well, particularly if people are calling you back about suspicious calls.
Check State Telemarketing Protections
Federal law provides a baseline, but states may maintain separate do-not-call programs or impose additional rules involving calling hours, required disclosures, caller registration, prerecorded messages, or consumer remedies.
Check the official website of your state attorney general, consumer-protection office, or public utility regulator. Avoid assuming that a rule or remedy available in one state applies nationwide.
If repeated calls continue after a documented opt-out request, a consumer attorney or legal-aid organization can explain whether federal or state law provides an individual claim. Deadlines, available damages, and evidence requirements depend on the applicable law and circumstances.
Use Several Steps Together
The most practical approach is to register your number, make direct do-not-call requests to recognizable businesses, activate carrier filtering, and report continued violations. Save detailed records when one company repeatedly contacts you.
These steps may not eliminate every scam call, but they can reduce calls from legitimate marketers and make persistent violations easier to document.
This article provides general information, not individualized legal advice. Federal rules contain exceptions, and state telemarketing and privacy laws vary.
