shell:$ nslookup -timeout=2 -retry=1 'u22192301.ct.sendgrid.net'
Server: 1.1.1.1
Address: 1.1.1.1#53
Non-authoritative answer:
Name: u22192301.ct.sendgrid.net
Address: 3.225.139.230
Name: u22192301.ct.sendgrid.net
Address: 3.148.148.237
Name: u22192301.ct.sendgrid.net
Address: 44.199.17.152
Name: u22192301.ct.sendgrid.net
Address: 100.29.61.130
Name: u22192301.ct.sendgrid.net
Address: 3.20.193.86
Name: u22192301.ct.sendgrid.net
Address: 18.116.152.91
| 
3.225.139.230