What "Restricted" means and why you might want to block them
A restricted number is a call where the caller has hidden their phone number from your display — you see "Restricted," "Unknown," "Private," or "Blocked" instead of digits. This is different from a number you recognize but want to block. Restricted calls come from people who deliberately chose not to show their identity, which is often legitimate (hospitals, government offices, some businesses use systems that hide their number) but can also be spam, scams, or harassment.
Blocking all restricted calls means you will not receive any call from someone hiding their number, even if they are trying to reach you for a real reason. Some people block them entirely. Others block them only during certain hours or use a screening feature that lets the call through but sends it to voicemail first, so you can listen and decide whether to call back.
Your phone's operating system and your carrier both have blocking tools. The method you use depends on whether you want to block restricted calls on just your phone, or whether you want your carrier to stop them before they reach you at all.
Key Takeaways
- Your phone's built-in settings can block all restricted calls, but the steps differ between iPhone and Android.
- Your carrier (Verizon, AT&T, T-Mobile, etc.) offers call-filtering services that block restricted calls before they reach your phone, often included free or for a small monthly fee.
- Blocking restricted calls on your phone will not stop voicemail from restricted numbers, but carrier-level filtering usually does.
- If you need to receive calls from hospitals, courts, or government offices, blocking all restricted calls may prevent important contact — screening instead of blocking is safer.
Blocking restricted calls on iPhone
On iPhone, you cannot block restricted calls directly through a "block restricted numbers" setting. Instead, you use the Silence Unknown Callers feature, which sends calls from numbers not in your contacts to voicemail automatically. Open Settings, tap Phone, then toggle on Silence Unknown Callers. This silences restricted calls along with any other number you have not saved.
If you want to block restricted calls but still receive calls from numbers you recognize, this is the best iPhone option. The caller will hear a ring, but your phone will not ring — the call goes straight to voicemail. You can listen to the message later and call back if it was important.
If you want to block restricted calls and prevent them from leaving voicemail, you will need to use your carrier's call-filtering service instead, because iPhone's built-in tools do not have that option.
Blocking restricted calls on Android
Android phones have a Block Unknown or Block Calls from Unknown Numbers setting, though the exact name and location varies by manufacturer and Android version. On most Android phones, open Phone or Dialer, tap the three-dot menu, go to Settings, then look for Blocked Numbers or Call Blocking. Some phones call it Do Not Disturb with an option to allow only contacts.
Samsung phones have a dedicated Block Unknown toggle in the Phone app settings. Google Pixel phones use Call Screen, which you can set to screen or block unknown callers. If you cannot find the setting on your specific phone, search your phone's help for "block unknown calls" — the exact path depends on your manufacturer.
Like iPhone, most Android blocking features send blocked calls to voicemail rather than preventing the voicemail itself. Your carrier's filtering service is more thorough if you want to stop restricted calls entirely.
Using your carrier's call-filtering service
Your phone company — Verizon, AT&T, T-Mobile, or another carrier — offers call-filtering tools that work at the network level, before calls reach your phone. These services can block restricted calls, spam, and known scam numbers. Verizon calls it Call Filter, AT&T calls it Call Protect, and T-Mobile calls it Scam Shield. Other carriers have similar services under different names.
Most carriers offer a free version that blocks known spam and scams, and a paid version (usually $3 to $5 per month) that adds more aggressive filtering, including the ability to block restricted calls. To set up your carrier's service, log into your account on the carrier's website or app, look for the call-filtering or spam-blocking section, and turn on the features you want. You can usually choose whether to block calls entirely or send them to a separate folder.
Carrier-level filtering is more effective than phone-level blocking because it stops calls before they reach your device. However, it also means you have no way to retrieve a message from a blocked restricted number if you change your mind later — the call is gone from the carrier's system.
What happens when you block a restricted call
When you block a restricted call using your phone's settings, the caller usually hears a message saying the number is not accepting calls, or the call rings once and disconnects. They may or may not be able to leave a voicemail, depending on your phone's settings. If you use your carrier's filtering service, the experience is similar — the call is rejected at the network level.
The person calling will not know whether you blocked them, your phone is off, or you straightforward did not answer. They will only know the call did not go through. If it is someone who needs to reach you urgently, they may try a different number or contact you another way.
Screening restricted calls instead of blocking them
If you are worried about blocking an important call from a hospital, court, or government office, screening is safer than blocking. Screening sends the call to voicemail but does not prevent the caller from leaving a message. You can listen to the message and call back if it is legitimate.
On iPhone, Silence Unknown Callers is a screening feature — it silences the call but allows voicemail. On Android, most blocking features also allow voicemail by default. If you want to screen calls without blocking them, check your phone's settings to make sure voicemail is turned on and that blocked calls can still leave messages.
Your carrier's call-filtering service usually has a "screen" or "send to folder" option separate from "block." Use the screen option if you want to review messages from restricted numbers before deciding whether to call back.
Frequently Asked Questions
Will blocking restricted calls stop voicemail from restricted numbers?
Phone-level blocking usually allows voicemail — the call is silenced but the caller can still leave a message. Your carrier's filtering service may block voicemail entirely, depending on which option you choose. Check your carrier's settings to see whether blocked calls can leave messages.
Can I block restricted calls only at certain times?
Most phone-level blocking is always on or always off. Your carrier's service may have scheduling options — check your carrier's app or website. Alternatively, use your phone's Do Not Disturb feature to silence calls during specific hours while allowing contacts through.
What if I block a restricted call by accident and need to unblock it?
If you blocked a number using your phone's settings, you can unblock it by removing it from your blocked list — go to your phone's call-blocking settings and look for a list of blocked numbers. If you blocked it at the carrier level, log into your carrier's app or website and remove it from the blocked list there. Calls from that number will come through normally after you unblock it.
Do I need to pay for call filtering?
Your phone's built-in blocking features are free. Your carrier's basic call-filtering service (blocking known spam) is usually free, but advanced filtering that blocks restricted calls typically costs $3 to $5 per month. Check your carrier's website to see what is included in the free version.
Will blocking restricted calls stop robocalls?
Some robocalls come from restricted numbers, so blocking restricted calls will stop those. However, many robocalls come from regular phone numbers that change with each call. Your carrier's spam-filtering service is more effective at stopping robocalls because it identifies them by pattern, not just by whether the number is hidden.