You can block a number directly in Google Voice in about 30 seconds

Open Google Voice on your computer or phone, find the conversation or call log entry from the number you want to block, and select the block option. Google Voice will then silence calls and texts from that number — they won't ring through to you, and messages won't appear in your inbox. The person calling won't hear a rejection message; the call will straightforward fail on their end.

Blocked numbers can still leave voicemails, but those voicemails go to a separate folder you can ignore or delete without listening. If you change your mind later, you can unblock the number the same way.

Key Takeaways

  • Blocking happens in the Google Voice app or website — open the call or message, tap or click the three-dot menu, and select "Block number".
  • Blocked callers hear a fast busy signal or call failure; they do not hear a message saying you blocked them.
  • Voicemails from blocked numbers still arrive but go to a separate folder labeled "Blocked" that you can check or ignore.
  • You can unblock a number at any time by going to Settings, selecting "Blocked numbers", and removing it from the list.
  • Blocking works the same way whether you use Google Voice on Android, iPhone, or a web browser.

Steps to block a number on the Google Voice app

On Android or iPhone, open the Google Voice app and go to the "Calls" or "Messages" tab. Find the conversation or call from the number you want to block. Tap the three-dot menu icon (usually in the top right of that conversation) and select "Block number". A confirmation window will appear — tap "Block" again to confirm.

If you want to block a number you haven't received a call or message from yet, you can also go to Settings (the gear icon), select "Blocked numbers", and tap the plus sign to add a number manually. Type or paste the full number and tap "Block".

Steps to block a number on the Google Voice website

Go to voice.google.com in your web browser and sign in with your Google account. Click "Calls" or "Messages" on the left side to see your call log or message history. Find the number you want to block, click the three-dot menu next to it, and select "Block number". Confirm the action in the popup that appears.

You can also manage your blocked list directly. Click the gear icon (Settings) in the top right, then click "Blocked numbers" in the left menu. You'll see a list of all numbers you've blocked and can add new ones or remove existing blocks from this page.

What happens when you block a number

When someone calls a number you've blocked, they hear a fast busy signal or a message saying the call cannot be completed. They do not hear a recording saying you blocked them. On their end, it sounds like the line is busy or disconnected.

Text messages from blocked numbers do not appear in your main message thread. Instead, they go directly to a folder labeled "Blocked" that you can view separately if needed. Most people never check this folder, so blocked messages effectively disappear from your view.

Voicemails are the exception: blocked callers can still leave voicemails, and those voicemails appear in a "Blocked" voicemail folder rather than your main inbox. You can listen to, delete, or permanently remove these voicemails without the caller knowing.

How to unblock a number

Open Google Voice and go to Settings (the gear icon). Select "Blocked numbers" from the menu on the left. You'll see a list of all numbers you've blocked. Find the number you want to unblock and click the X or trash icon next to it. The number will be unblocked when ready, and you'll start receiving calls and messages from them again.

On the mobile app, the process is the same: Settings > Blocked numbers, then tap the X next to the number you want to remove from your blocked list.

Blocking vs. other ways to manage calls

Google Voice also lets you mark a number as spam without blocking it. When you mark a number as spam, Google learns from your report and may filter similar calls for other users, but the number can still reach you. Blocking is stronger — it stops the calls entirely.

You can also set up Do Not Disturb mode in Google Voice, which silences all calls and messages during certain hours but doesn't block specific numbers. This is useful if you want quiet time but don't want to permanently block anyone.

If you want to block calls from unknown numbers entirely, Google Voice has a setting for that too. Go to Settings and toggle on "Filter unknown callers" — this sends calls from numbers not in your contacts to voicemail automatically. You can still see and listen to those voicemails, but they won't interrupt you.

Frequently Asked Questions

Can someone tell if I blocked them?

No. When a blocked caller tries to reach you, they hear a busy signal or call failure — the same thing they'd hear if your phone was off or the line was disconnected. There's no message or indication that you blocked them specifically. They might suspect it if calls always fail but texts to other people work, but Google Voice doesn't tell them directly.

Do blocked voicemails count against my storage?

Yes, voicemails from blocked numbers still use your Google Voice storage space. If you want to free up space, you can delete them from the "Blocked" voicemail folder. Permanently deleting a voicemail removes it from your account entirely.

What if I block a number by mistake?

You can unblock it when ready by going to Settings > Blocked numbers and clicking the X next to the number. Once unblocked, calls and messages from that number will come through normally again. There's no waiting period or confirmation needed to unblock.

Can I block a number that hasn't called me yet?

Yes. Go to Settings > Blocked numbers and tap the plus sign to add a number manually. Type the full phone number and tap "Block". This is useful if you know a number you want to avoid before they contact you.

Does blocking on Google Voice block them everywhere?

No. Blocking a number in Google Voice only affects calls and messages that come through Google Voice. If that person has your personal cell number or contacts you on social media or email, those messages will still reach you. Google Voice blocking is separate from your phone's native blocking features.