Whitelist Airtable IP addresses

I am using Integromat to pick up a webhook sent from Airtable. I want to then whitelist the Airtable IP addresses

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How to know the IP of my airtable account - #2 by Bill.French ← question was asked here, but not answered (a re-open might be a good option so we can re-open questions).

To answer some of the questions in that original post:

  1. I understand this is not a cure-all security method, it does provide one more layer of protection.
  2. Yes, a webhook is my preferred method of sending data from Airtable in this instance as this webhook works across a number of services - so it is not a read Airtable first scenario.

Thanks