Practical guide

How to stop spam calls

A step-by-step approach to reducing unwanted calls and texts in the United States—what actually helps, what the law protects, and what to keep if a caller crosses a line.

01

Step 1: Register on the National Do Not Call Registry

Registration at DoNotCall.gov is free, takes a minute, and does not expire. Telemarketers covered by the rules generally must stop sales calls within 31 days of your registration.

The Registry does not stop everything. Scammers ignore it, and political, charitable, survey, purely informational, and debt-collection calls are treated differently.

02

Step 2: Tell a specific company to stop

Separately from the national list, you can ask an individual company to place you on its internal do-not-call list. Note the date, the name of the person or company, and the exact request you made.

If you once gave permission to be contacted, you can generally revoke that consent through any reasonable method, and covered callers must honor a revocation within no more than 10 business days.

03

Step 3: Use blocking and filtering tools

Most carriers offer call-labeling and blocking services, and both iPhone and Android can silence calls from unknown numbers and filter unknown-sender texts. Voicemail still captures anything legitimate.

  • Turn on your carrier's spam labeling or blocking feature
  • Silence or route unknown callers to voicemail
  • Filter unknown-sender messages on your phone
  • Forward unwanted spam texts to 7726 (SPAM)

04

Step 4: Do not engage

Answering, pressing a key, or saying words to a recording can confirm that a real person is on the line and lead to more calls. Never share account numbers, one-time codes, or payment details with an unexpected caller, even if the caller ID looks local or familiar—numbers are easy to spoof.

05

Step 5: Know what your rights cover

Federal law restricts certain automated calls, prerecorded or artificial-voice messages, and marketing texts sent without required consent, and it sets Do Not Call and identification requirements. Debt collection is handled under separate rules that address call timing, frequency, and harassment.

Not every unwanted call is illegal. Whether a particular call breaks the law depends on who called, the technology used, the content, and your consent history.

06

Step 6: Save the evidence

If calls continue, a simple record is far more useful than memory. Keep originals and avoid editing them.

  • Date, time, and the number that appeared on caller ID
  • Screenshots of texts and saved voicemails
  • The company or product being pitched
  • Your call log showing repeat contacts
  • Any opt-out or stop request and how you sent it

07

Step 7: When to report a violation

Consider reporting when calls keep coming after you registered or asked a company to stop, when a recording or automated text arrives without your permission, or when a collector calls at odd hours or repeatedly about the same debt.

Complaints to the FCC, FTC, and CFPB support enforcement but do not award money to you. Information here is educational only and is not legal advice about your situation.

Sources and updates

Last reviewed: September 2026

This page is written from official federal material. Rules change, and agencies update their guidance—check the primary sources below for the current version.

Educational information only. Not legal advice, and not a substitute for consulting a licensed attorney about your situation. Need a term explained? Read the plain-language glossary.