@Liz-Pitre
Thanks for getting back to us. Yes, regex will definitely help you when you have a range of numbers to search for and update/replace.
Just be careful though, that if your data contains ANY other numbers the regex \d+ will find them ALL.
Sometimes telling us more about what you don’t want changed can help as much as what you do want changed. In this case you told us the digits which need replacing are either 7 or 8 digits long. We could make a regex which works ONLY on this data if needed.
In terms of learning more about NPP (wording used synonymously with Notepad++) and about the regex engine within NPP may I direct you to our FAQ section. Within are lots of links to various websites which will help in your learning process. Also feel free to ask on this forum when it’s NPP related.
Welcome.
Terry