I need to gate participants out if they enter a zip code that doesn't match a list of zip codes I have. The list may be fairly large so I don't want to do individual conditions for each one. What I'm currently attempting is a negative lookaround regex, however it doesn't seem to work. I don't know whether Qualtrics can do negative lookaround and that's the issue or whether I"m doing it wrong for the way Qualtrics expects regex to be formatted.



Currently trying the following:

"/(?!90210|24680)/gm"



Which is intended to behave so that if you enter either of those zips, you move on to the next question, but if you enter 5 digits (I have validation for US postal code turned on) that don't match either of those, you therefore match the regex and get pushed to the end of survey.