[ec2-user@ip-172-31-22-49 ~]$ dig ns dev.heoffice.com ; <<>> DiG 9.8.2rc1-RedHat-9.8.2-0.62.rc1.56.amzn1 <<>> ns dev.heoffice.com;; global options: +cmd;; Got answer:;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 64454;; flags: qr rd ra; QUERY: 1, ANSWER: 4, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION:;dev.heoffice.com. IN NS ;; ANSWER SECTION:dev.heoffice.com. 172800 IN NS ns-0.awsdns-00.com.dev.heoffice.com. 172800 IN NS ns-1024.awsdns-00.org.dev.heoffice.com. 172800 IN NS…