Imperva Cyber Community

Hello community.

I'm getting into the knowledge of understanding regular expressions.

MY question is, could you help me how to define a regular expression that always detects the number 035 that comes at the beginning within a 15-digit value.

035 ##############

#On-PremisesWAF(formerlySecuresphere)

Hi Jose.  Great question.  I don't happen to know the answer off the top of my head, but anytime I've had to develop RegEx's for DLP or data discovery and classification, advanced profiling filters, or routing / delivery rules, etc., I've turned to a couple of tools / sites.  You may have already looked at these but, I've used them in the past and found them helpful:

• Regular Expressions 101 - RegEx101.com 
• RegEx Coach - regex-coach
• Regular Expression Library - RegExLib.com

I know you can google any other number of regex tools and library's and find a ton of them, but several of us have used those three tools and found them helpful.

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John Thompson
Presales Director
Imperva
San Diego CA
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Hi Jose,

This will match assuming the 15 digit value is also comprised of numbers.

^035\s[0-9]{15}$

This regex can be tested at: https://regex101.com/r/SJogss/1