What is the collective noun for rang?

There isn't a specific collective noun for "rang". The word "rang" is the past tense of the verb "ring", which is used to describe the sound a bell or phone makes.

It's possible you're thinking of a collective noun for something related to ringing, such as:

* A peal of bells

* A chorus of chimes

* A symphony of sounds

However, "rang" itself doesn't have a collective noun.