Dig is a DNS lookup utility provided by ISC. This page is a simple web interface for dig.
$ dig gdsys.co.kr ; <<>> DiG 9.11.3-1ubuntu1.11-Ubuntu <<>> gdsys.co.kr ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 44196 ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 512 ;; QUESTION SECTION: ;gdsys.co.kr. IN A ;; ANSWER SECTION: gdsys.co.kr. 3599 IN A 183.86.221.26 ;; Query time: 100 msec ;; SERVER: 8.8.8.8#53(8.8.8.8) ;; WHEN: Mon Feb 17 03:18:16 UTC 2020 ;; MSG SIZE rcvd: 56