Google has updated the JSON files with the list of IP addresses Googlebot. I believe Google added one new IP6 and one new IP4 IP address to the list. That is, if I am looking at the file correctly.
Not to be outdone by Google, Microsoft's Fabrice Canel announced that it has published BingBot's IP addresses in this JSON file. This is in addition to the methods to verify Microsoft Bing is crawling ...
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