To permanently block a number, use your phone's built-in Phone or Settings app to add the number to the block list, often found under "Blocked Numbers" or "Call Blocking," allowing you to manually enter numbers from calls, contacts, or by typing them in directly, which stops calls and texts from that number from reaching you without notifying the caller.
Block a number
Open your Phone app . Call history . Tap a call from the number you want to block. Tap Block / report spam.
Yes, you can permanently block websites on your Android using parental control apps like Norton Family, browser extensions, and DNS filtering. These sites remain blocked until you decide to unblock them.
The National Do Not Call Registry protects landline and wireless phone numbers. You can register your numbers on the National Do Not Call Registry at no cost by calling 1-888-382-1222 (voice) or 1-866-290-4236 (TTY).
The person you blocked will not realize you blocked them when they try to call you. On their end, they'll hear the phone ring a few times. Then, their call will go straight to voicemail.
Dialing *77 on your phone activates Anonymous Call Rejection, blocking incoming calls from private or blocked numbers, making anonymous callers hear a message to hang up and try again. It's a landline/VoIP feature (like AT&T, CenturyLink) to stop spam/prank calls but can sometimes vary by carrier or state, potentially connecting to emergency services (like *87 to turn it off).
Block a number using Contacts
You cannot block an Unknown Caller (No Caller ID), but you can turn on Do Not Disturb manually and set it to "Only allow calls from your contacts list." The call blocking feature may not affect phone calls made or received via third-party apps installed on your device.
Blocking and Text Messaging
When a number is blocked, the blocked person can technically still send a text message to your phone number. However, the message will not be delivered to your SMS inbox. Instead, it will appear as though the message was sent, but you won't receive it.
Block Contacts in Settings in iOS 26
Tap Blocked Contacts. Tap Add Blocked Contact, then enter the contact that you want to block. Tap Block Contact.
This Vertical Service Code, *82, enables calling line identification regardless of subscriber preference, dialed to unblock withheld numbers (private callers) in the U.S. on a per-call basis.
Call trace allows you to dial the code *57 to trace the phone number of a call that was received. This service is used to trace harassing calls which warrant law enforcement or legal action. If you do not intend to take legal action, then an alternative is to use Call Return with *69.
How to block every incoming call. incoming calls to your line: *35*0000#.
*87 | Anonymous Callers: Allow
Calls without caller ID will be allowed.
For illegal scam calls, pressing 9 can actually increase the number of calls you receive. The safest way to stop telemarketing calls legally is by leveraging your legal rights. Register on the National Do Not Call Registry and understand the TCPA and state-specific rules.
The simplest and most common way to call someone who's blocked you is by hiding your caller ID. When you do this, your call appears as “Private,” “Unknown,” or “No Caller ID” on the recipient's screen.
If the person you blocked calls your number, they'll go to voicemail and can leave a message, but you won't get a missed call or voicemail notification.
It depends on your end goal. If you are doing this to get them back then just ignore. If you just want to move on then block. If your goal is to hurt them, I would advise not to.
There's no way to see texts from blocked contacts. However, you can try contacting your mobile network carrier to see if you can access your message logs through them. Verizon, for instance, lets you download mobile, text and data usage details for the last 90 days. Call logs are also not visible for blocked numbers.
Signs you may have been blocked
If you have an iPhone and text another iPhone but don't see a “Delivered” notification, someone may have blocked you. (Android phones don't automatically show these messages.) The same goes for if you consistently see a green text bubble instead of a blue one on your iPhone.