These entries are queried from radb.net using whois, you can try my project getting these.
:AS-SALESFORCE as-set: AS-SALESFORCE descr: Salesforce.com ASNs members: AS14340,AS45422,AS394808,AS396417,AS22606,AS32870 admin-c: SFDC2-LEVEL3 tech-c: SFDC2-LEVEL3 notify: neteng [at] salesforce.com mnt-by: SALESFORCE-MNT changed: adionisio [at] salesforce.com 20201111 source: LEVEL3