if the general template of your data is always :

........@..........;......

Here are, below, 3 other possible regex S/R. Similarly to Scott’s post, you must select the Regular expression search mode, tick the Wrap around option and click on the Replace All button. Note that the Replace with: zone is always Empty

First regex :

SEARCH (?-s)@.+

REPLACE Empty

Results :

123.456.78.0:22000
12.3.456.789:10000

Second regex :

SEARCH (?-s).+?@|;.+

REPLACE Empty

Results :

Name\Name123
NAME\Name-1

Third regex :

SEARCH (?-s).+;

REPLACE Empty

Results :

name
Name2017

Best Regards,

guy038

If I were you I’d create 3 new copies of your data in 3 new Notepad++ tabs.

Then taking each new tab in turn, do the following:

Tab #1

Find what zone: ^([^@]+)@(?-s).+
Replace with zone: \1
Wrap around checkbox: ticked
Action: Press Replace All button

Sample results:

123.456.78.0:22000
12.3.456.789:10000

Tab #2

Find what zone: ^[^@]+@([^;]+);(?-s).+
Replace with zone: \1
Wrap around checkbox: ticked
Action: Press Replace All button

Sample results:

Name\Name123
NAME\Name-1

Tab #3

Find what zone: (?-s)^.+?;(.+)$
Replace with zone: \1
Wrap around checkbox: ticked
Action: Press Replace All button

Sample results:

name
Name2017

Of course, all this keys upon the @ and ; occurring in the data where the examples show…and nowhere else. It will need some changes if this is not always true