# CID vs CIP

> English confusable word pair

## The two words

### CID
*noun · IPA /sɪd/ · frequency rank #23,782*
caller identification; a feature that identifies the phone number of the caller.

### CIP
*noun · frequency rank #46,378*
Initialism of common isochronous packet.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-09-03.
Canonical page: https://plainspell.com/en/vs/cid-vs-cip