To block your number when calling someone, you have several options depending on whether you want to block it temporarily for a single call or permanently for all calls:

Temporary (Per-Call) Number Blocking

• Dial *67 (on most US carriers) before the phone number you want to call. This hides your caller ID for that call only, and your number will show as "Private" or "Blocked" on the recipient's phone

• Alternatively, on some networks, you can dial #31# before the number to block your number temporarily for that call

Permanent Number Blocking on Your Phone

• iPhone:
  1. Go to Settings > Phone
  2. Tap "Show My Caller ID"
  3. Toggle it off to hide your number on all outgoing calls

• Android:
  1. Open the Phone app
  2. Tap the menu (three dots) > Settings > Calls > Additional settings > Caller ID
  3. Select "Hide number" to block your caller ID for all calls

Carrier Assistance

• You can also contact your wireless carrier and ask them to block your number on all outgoing calls. This might be useful if your phone does not support caller ID blocking or you want to block multiple lines

Notes

• Some carriers or recipients may block calls from private or blocked numbers. If you want to unblock your number temporarily, you can dial *82 (or #31# on some networks) before the number

• Blocking your number means the person you call will see "Private," "Blocked," or "Unknown" instead of your phone number.

In summary, use *67 or #31# before the number to block your number for a single call, or change your phone settings to hide your caller ID permanently on all calls. Contact your carrier if you need further assistance or want a network-wide block.