Sendgrid - Approximate list of the IP addresses that the domain sendgrid.net allows email to be sent from according to their SPF record

50.31.32.0/19  (8192 addresses) 149.72.0.0/16 (65536 addresses) 159.183.0.0/16  (65536 addresses) 167.89.0.0/17  (32768 addresses) 168.245.0.0/17  (32768 addresses) 192.254.112.0/20  (4096 addresses) 198.21.0.0/21  (2048 addresses) 198.37.144.0/20  (4096 addresses) 208.117.48.0/20  (4096 addresses) 223.165.113.0/24  (256 addresses) 223.165.115.0/24  (256 addresses) 223.165.118.0/23  (512 addresses) 223.165.120.0/23  (512 addresses)