shell:$ nslookup -timeout=2 -retry=1 'cognito-idp.us-east-1.amazonaws.com'
Server:		1.1.1.1
Address:	1.1.1.1#53

Non-authoritative answer:
Name:	cognito-idp.us-east-1.amazonaws.com
Address: 184.73.60.85
Name:	cognito-idp.us-east-1.amazonaws.com
Address: 52.203.32.117
Name:	cognito-idp.us-east-1.amazonaws.com
Address: 52.55.212.211
Name:	cognito-idp.us-east-1.amazonaws.com
Address: 3.218.189.3
Name:	cognito-idp.us-east-1.amazonaws.com
Address: 34.226.160.92
Name:	cognito-idp.us-east-1.amazonaws.com
Address: 54.85.146.136
Name:	cognito-idp.us-east-1.amazonaws.com
Address: 2600:1f18:257:8000:b1f1:a847:b851:d3a9
Name:	cognito-idp.us-east-1.amazonaws.com
Address: 2600:1f18:257:8001:b81b:6e09:530e:459f
Name:	cognito-idp.us-east-1.amazonaws.com
Address: 2600:1f18:257:8001:93f2:ca1e:f8f:aa3d
Name:	cognito-idp.us-east-1.amazonaws.com
Address: 2600:1f18:257:8002:8e50:a30e:9b44:91b1
Name:	cognito-idp.us-east-1.amazonaws.com
Address: 2600:1f18:257:8000:616f:7650:d1ce:123d
Name:	cognito-idp.us-east-1.amazonaws.com
Address: 2600:1f18:257:8002:e801:9f4:8351:2edb