How to Block Spam Calls

Reduce unwanted telemarketing and spam calls by using phone settings and blocking tools.

Steps

1
Add your number to the National Do Not Call Registry
at donotcall.gov. This stops most legitimate telemarketers from calling you.
2
Turn on spam call blocking in your phone settings.
On iPhone, enable Silence Unknown Callers. On Android, turn on Caller ID and Spam Protection.
3
Use a call blocking app
like RoboKiller or Hiya. These apps identify known spam numbers and block them before your phone rings.
4
Block individual spam numbers
by adding them to your block list. Long press the number in your recent calls list and select Block.
5
Report spam calls to the FTC
at donotcall.gov. Reporting helps the authorities track and take action against spam callers.

Will the Do Not Call Registry stop all spam calls?Show

No, it only stops legitimate telemarketers. Scammers and robocallers ignore the registry, so you need extra blocking tools.

Can I block spam calls on my home phone?Show

Yes, many home phone providers offer call blocking features. Check with your phone company about their spam protection options.

Is it safe to answer a spam call?Show

It is safer not to answer. Answering tells scammers your number is active, which may lead to more spam calls.

Written by the HowToDoStuff.online editorial team. Last updated May 18, 2026.