Apparently bought in two chunks: 3.0.0.0/9 and 3.128.0.0/9. Previous owner was GE. Anecdotal reports across the Internet that AWS EIPs are now being assigned in that range. https://whois.arin.net/rest/net/NET-3-0-0-0-1.html https://whois.arin.net/rest/net/NET-3-128-0-0-1.html