Access IIS http/https website outside externally

Hello.

Where is "www.arjunWinter.com" a hosted domain?
Even if I run the nslookup command, the name cannot be resolved.
Is it a public domain hosted on Route53 or something?
I think it's set directly in the domain settings of your PC so that only you can access it.

nslookup www.arjunWinter.com
Server:         192.168.11.1
Address:        192.168.11.1#53

** server can't find www.arjunWinter.com: NXDOMAIN

dig www.arjunWinter.com ns

; <<>> DiG 9.16.1-Ubuntu <<>> www.arjunWinter.com ns
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 35142
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1232
;; QUESTION SECTION:
;www.arjunWinter.com.           IN      NS

;; AUTHORITY SECTION:
com.                    900     IN      SOA     a.gtld-servers.net. nstld.verisign-grs.com. 1702361974 1800 900 604800 86400

;; Query time: 48 msec
;; SERVER: 192.168.11.1#53(192.168.11.1)
;; WHEN: Tue Dec 12 15:19:52 JST 2023
;; MSG SIZE  rcvd: 121

If you want to publish your domain externally, you will need to purchase a public domain yourself.
For example, at Route53, purchase by following the steps in the document below.
https://docs.aws.amazon.com/Route53/latest/DeveloperGuide/domain-register.html#domain-register-procedure-section