Regex - Ignore if group has prefix

I am trying to capture 8 digit phone numbers in free text. This should be ignored if a particular string appears before.

My regex:

(\b(\+?001|002)?[-]?\d{4}(-|\s)?\d{4}\b)

To Capture:

+001 12345678
12345678

Not Capture:

TTT-12345678-123
TTT-12345678

I am trying to use negative look behind as below example:

\w*(?<!foo)bar

But the above works only if the regex doesn't have subsequent groups.

You may use

(?<!TTT-)(?<!\w)(?:\+?001|002)?[-\s]?\d{4}[-\s]?\d{4}\b

See the regex demo

Details

• (?<!TTT-) - no TTT- allowed immediately on the left
• (?<!\w) - no word char allowed immediately on the left
• (?:\+?001|002)? - an optional non-capturing group matching 1 or 0 occurrences of +001, 001 or 002
• [-\s]? - an optional - or whitespace
• \d{4} - any four digits
• [-\s]?\d{4} - - an optional - or whitespace and any four digits
• \b - a word boundary.

If the number can be glued to a word char on the right, replace the \b word boundary with the right-hand digit boundary, (?!\d).