← Back to Blog
TipsMay 6, 2026

How to Block 'No Caller ID' Calls: Top Apps for Everyday Users

By The Robokiller Team

How to Block 'No Caller ID' Calls: Top Apps for Everyday Users

Receiving calls labeled as 'No Caller ID' can be frustrating and intrusive. These calls often originate from telemarketers, scammers, or unknown sources. Fortunately, there are several applications designed to help you block or identify these calls, enhancing your privacy and peace of mind.

What Are 'No Caller ID' Calls?

'No Caller ID' calls occur when the caller intentionally hides their phone number, making it appear as 'No Caller ID' on your device. This practice is commonly used by telemarketers, scammers, or individuals who prefer to remain anonymous. While some legitimate calls may also come through this way, the majority are unsolicited and potentially harmful.

How Can I Block 'No Caller ID' Calls?

There are several methods to block or manage 'No Caller ID' calls:

  1. Built-in Phone Features:
  • iPhone: Enable the 'Silence Unknown Callers' feature by navigating to Settings > Phone > Silence Unknown Callers. This will silence calls from numbers not in your contacts, recent calls, or Siri suggestions. (fone.tips)
  • Android: Use the built-in spam detection feature in the Phone app. Go to Settings > Spam and Call Screen, and enable 'See caller & spam ID' and 'Filter spam calls'. (whocalledus.net)
  1. Carrier Services: Many U.S. carriers offer free spam call protection:
  • AT&T: ActiveArmor provides network-level blocking and a free app.
  • Verizon: Call Filter offers basic spam detection.
  • T-Mobile: Scam Shield provides Scam Likely warnings on caller ID. (whocalledus.net)
  1. Third-Party Apps: Several applications specialize in blocking or identifying 'No Caller ID' calls:
  • RoboKiller: This app not only blocks spam calls but also answers them with pre-recorded 'answer bots' that waste the scammer's time. It boasts a 99% success rate in blocking robocalls. (claritycheck.com)

  • Truecaller: With a vast database of over 500 million spam numbers, Truecaller identifies unknown callers in real-time and flags known spam. It also offers AI-powered number lookup and SMS spam protection. (rahsha.in)

  • Hiya: Trusted by major carriers like AT&T and T-Mobile, Hiya provides carrier-level spam blocking, real-time caller ID, and fraud detection alerts. (rahsha.in)

Which App Is Best for Everyday Users?

For everyday users seeking a reliable solution to block 'No Caller ID' calls, RoboKiller stands out. Its unique approach of engaging scammers with 'answer bots' not only protects you but also wastes the scammer's time, reducing their capacity to make further calls. Additionally, RoboKiller's database and blocking capabilities are robust, ensuring a high success rate in blocking unwanted calls. (claritycheck.com)

How Do These Apps Compare?

Feature RoboKiller Truecaller Hiya
Spam Call Blocking 99% success rate in blocking robocalls. (claritycheck.com) Identifies unknown callers in real-time and flags known spam. (rahsha.in) Provides carrier-level spam blocking and real-time caller ID. (rahsha.in)
Unique Features Engages scammers with 'answer bots' to waste their time. (claritycheck.com) AI-powered number lookup and SMS spam protection. (rahsha.in) Trusted by major carriers like AT&T and T-Mobile. (rahsha.in)
Availability Available on both iOS and Android. (claritycheck.com) Available on both iOS and Android. (rahsha.in) Available on both iOS and Android. (rahsha.in)

Are There Any Free Options?

Yes, some apps offer free versions with basic features:

  • Truecaller: Offers a free version with ads and basic caller ID features. (claritycheck.com)

  • Hiya: Provides a free tier with basic features, supported by ads. (claritycheck.com)

However, for comprehensive protection and advanced features, a premium subscription may be required.

Conclusion

While built-in features and carrier services offer basic protection against 'No Caller ID' calls, third-party apps like RoboKiller provide enhanced security with unique features such as engaging scammers with 'answer bots'. Assess your needs and choose the solution that best fits your lifestyle to effectively block unwanted calls.

For a visual guide on blocking 'No Caller ID' calls on iPhone, you can watch the following video:

How to Block 'No Caller ID' Calls on iPhone

Frequently Asked Questions

Related articles

Live life spam-call-free.

Robokiller blocks 99% of spam calls and texts so you can take your phone back.

Try free for 7 days