callerid

noun
UK /ˈkɔːlə aɪˈdiː/
US /ˈkɔːlər aɪˈdiː/

A caller ID is a small screen that shows who is calling you on the phone.

The caller ID showed my grandma's name before I picked up the phone.


OTHER MEANINGS

2. A service that sends the caller's name and number to the phone being called.

We pay extra for caller ID on our home phone.

3. The name or number shown on a phone when someone calls.

The caller ID said 'Unknown Number,' so I didn't answer.

4. A feature on a phone that lets you see who is calling before you answer.

She checked the caller ID to make sure it wasn't a stranger.