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Small Business Resources / How To

How to block anonymous calls

Last Updated: July 21, 2025

You can block calls from anonymous numbers by following these instructions:

  1. Log in to office.ooma.com as an administrator and navigate to the Settings page.
  2. Click System, then navigate to the Call Blocking tab.
  3. Click the “Block anonymous calls and play a busy tone” checkbox.
  4. Click Save.
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