How to remove a part from found?

Question

Regular Expressions

There are lines like:

[email protected]: 161 361 361: 1251136136
[email protected]: 2361251251225: -
[email protected]: 215,125,151,251,252: 135,263,623.13631535315

There's an expression:
(* * *..) (*. $)

but it looks for the entire line and I need to remove everything from the end of the line up to : leaving
[email protected]:______

Answer 1

Find: (^.*:.*):(.*$)
Replace: $1
https://regex101.com/r/d9KxE7/2
Or ^.*:.*\K:.*$, and leave the replacement string empty.
https://regex101.com/r/d9KxE7/3

Answer 2

(^.*:.*):.*$