209.85.215.50 cai dentro de 209.85.128.0/17, portanto o registro do Google está correto:
% ipcalc 209.85.128.0/17 | grep Host
HostMin: 209.85.128.1 11010001.01010101.1 0000000.00000001
HostMax: 209.85.255.254 11010001.01010101.1 1111111.11111110