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Yash Kumar GuptaYash Kumar Gupta 

IP Address

Hi All
I refere "https://help.salesforce.com/s/articleView?id=000321501&type=1" this article and they mention If your org is not on a Public Cloud instance and you would prefer not to allow Public Cloud IP ranges, you do not need to allow Public Cloud (Canada, Australia) IP ranges. And also they have mention 
Please be reminded that our best practice and recommendation is to allow the entire list of Salesforce IP ranges for seamless access.
Which create confusion so can you help me in this Do I need to mention IP range under APNIC, Australia (Public Cloud) and RIPE region even my instance is located at America region  ?
Best Answer chosen by Yash Kumar Gupta
SwethaSwetha (Salesforce Developers) 
HI Yash,
As you rightly pointed out from the documentation, the best practice is to whitelist the entire set of provided IP ranges. This is to avoid unintended service disruptions.

However, as you only want to allow the American region, add ARIN IP ranges.

IPv4 NetworkIPv4 IP Range
ARIN
13.108.0.0/1413.108.0.0 - 13.111.255.255
66.231.80.0/2066.231.80.0 - 66.231.95.255
68.232.192.0/2068.232.192.0 - 68.232.207.255
96.43.144.0/2096.43.144.0 - 96.43.159.255
128.17.0.0/16128.17.0.0 - 128.17.255.255
128.245.0.0/16128.245.0.0 - 128.245.255.255
136.146.0.0/15136.146.0.0 - 136.147.255.255
198.245.80.0/20198.245.80.0 - 198.245.95.255
199.122.120.0/21199.122.120.0 - 199.122.127.255
204.14.232.0/21204.14.232.0 - 204.14.239.255
34.226.36.48/2834.226.36.48 - 34.226.36.63
34.211.108.32/2834.211.108.32 - 34.211.108.47
13.58.135.64/2813.58.135.64 - 13.58.135.79
13.56.32.176/2813.56.32.176 - 13.56.32.191
35.182.14.32/2835.182.14.32 - 35.182.14.47

To be double sure, you can try to test what IP ranges Salesforce uses for your location and try whitelisting only them.

If this information helps, please mark the answer as best. Thank you