What "restricted" means and why you might want to block them

A restricted number is a call where the caller has deliberately hidden their phone number from your display. You see "Restricted," "Unknown," "Private," or "Blocked" instead of a phone number. These calls come through your normal phone line — they are not spam or scam calls necessarily, but the person on the other end chose not to show their identity.

Some restricted calls are legitimate: doctors' offices, banks, and government agencies sometimes call from systems that hide their number. Others are unwanted sales calls or scammers using restricted settings to avoid being identified. If you are getting many restricted calls and do not want them, you have several ways to stop them from reaching you.

The method you use depends on what kind of phone you have — a landline, a cell phone, or a VoIP service — and what your phone company or device offers.

Key Takeaways

  • Most cell phones let you block unknown and restricted calls directly in the phone settings, without paying extra or calling your provider.
  • Landline users usually need to contact their phone company to turn on call blocking, and some providers charge a monthly fee for this feature.
  • Do-not-call lists and blocking apps can reduce unwanted calls, but they do not stop all restricted numbers because some callers ignore the rules.
  • If you block all restricted calls, you may miss legitimate calls from hospitals, banks, or government offices that hide their numbers.

Blocking restricted calls on iPhone

On an iPhone, you can block unknown callers directly in the Phone app settings. Open Settings, tap Phone, scroll down to Silence Unknown Callers, and turn it on. When this is active, calls from numbers not in your contacts go to voicemail instead of ringing your phone.

This method blocks all unknown and restricted numbers at once. The downside is that you will not hear the phone ring for these calls, so you have to check your voicemail to see who called. If you expect calls from doctors, banks, or other services you do not have saved as contacts, you may miss them.

You can also block specific numbers one at a time. When a restricted call comes in, tap the info icon next to the call, scroll down, and select Block This Caller. That number will not reach you again, though a new restricted number from the same caller may still get through.

Blocking restricted calls on Android

Android phones have a similar feature called Block Unknown. The exact location depends on your phone model and Android version, but it is usually in Settings > Phone > Call Blocking or Settings > Apps > Phone > Block Unknown. Turn this setting on, and unknown and restricted calls will go to voicemail.

Like the iPhone version, this silences all calls from numbers not in your contacts. You will need to check voicemail to see if anyone important called. Some Android phones also let you block calls from numbers without caller ID, which catches more restricted calls but may block some legitimate ones.

To block a specific restricted number after it calls, open the Phone app, find the call in your recent list, tap and hold it, and select Block Number or Add to Reject List. The exact wording varies by manufacturer.

Blocking restricted calls on landlines

Landline blocking works differently because your phone company controls the network. You cannot block calls directly on the phone itself — you have to ask your provider to do it for you.

Call your landline provider and ask about call blocking or call screening services. Most major providers offer this, but names and costs vary: AT&T calls it Call Protect, Verizon calls it Call Filter, and smaller providers may have their own names. Some providers include basic blocking for free, while others charge $3 to $5 per month. Ask what the service blocks — some block only known spam, while others can block restricted numbers.

If your provider does not offer call blocking, you can buy a device that sits between your phone line and your phone. These devices filter calls before they reach your handset, though they cost $50 to $200 upfront.

Using call blocking apps

Third-party apps like RoboKiller, Nomorobo, and Truecaller can block restricted calls on both iPhone and Android. These apps work by comparing incoming calls against databases of known spam and scam numbers. Some also let you block calls from numbers that do not show caller ID.

Most of these apps are free but show ads, or charge $3 to $10 per month for ad-free versions. They work best for blocking known spam numbers, but they are less reliable at blocking all restricted calls because new numbers are added to spam lists constantly.

One advantage of apps is that they can answer calls for you and record conversations, which can help you identify who is calling. The downside is that they use your phone's battery and data, and some require you to give them permission to access your contacts and call history.

Registering with the National Do Not Call Registry

The National Do Not Call Registry is a free list you can add your phone number to. Telemarketers are supposed to check this list before calling, and if they call you anyway, you can report them. You can register at donotcall.gov or by calling 1-888-382-1222.

Registering does reduce telemarketing calls, but it does not stop all of them. Charities, political organizations, surveys, and debt collectors are allowed to call even if you are on the list. Scammers ignore the list entirely. Restricted calls from these groups will still reach you unless you block them separately.

What to do if blocking affects important calls

If you turn on blocking for all unknown and restricted calls, you may miss calls from hospitals, pharmacies, banks, or government offices. These organizations sometimes call from systems that hide their number.

If this happens, you have a few options. You can turn off the blocking feature and use a call blocking app instead, which gives you more control over which calls get through. You can add the phone numbers of places you expect to hear from to your contacts, so their calls come through even if they use a restricted number. Or you can check your voicemail regularly and call back any messages from people you recognize.

Another option is to use a whitelist: some phones and apps let you allow calls only from numbers in your contacts, and block everything else. This is the most restrictive but also the most effective at stopping unwanted calls.

Frequently Asked Questions

Can I block restricted calls without blocking all unknown numbers?

Not directly on most phones. The blocking feature treats restricted and unknown numbers the same way. If you need more control, use a call blocking app that lets you set custom rules — for example, blocking calls with no caller ID but allowing calls from numbers you have not saved yet.

Will the caller know I blocked them?

No. When you block a number, the call goes to voicemail or is rejected silently. The caller will not receive a message saying they were blocked. They may notice you never call back, but they will not know for certain that you blocked them.

Do I have to pay to block restricted calls?

Not on cell phones — iPhone and Android both offer free blocking in the phone settings. Landline users may have to pay $3 to $5 per month through their phone company, depending on the provider. Call blocking apps are free with ads or cost $3 to $10 per month for premium versions.

What if a scammer calls from a restricted number?

Block the number if you can identify it, or block all restricted calls if you are getting many of them. If you have already given them information, contact your bank or credit card company right away. You can also report the call to the Federal Trade Commission at reportfraud.ftc.gov.

Can I unblock a number I blocked by mistake?

Yes. On iPhone, go to Settings > Phone > Blocked Contacts and swipe left on the number to unblock it. On Android, open the Phone app, go to Blocked Numbers or Reject List, find the number, and tap Unblock. The exact steps vary by phone model.