You use IPv4 protocol.
http://www.polarhome.com supports IPv6 too.

Hostname=
IP address=3.149.251.155

ISP information:





Connection information:
Connection=
User agent=Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
Remote port=7673
Server port=80
Protocol=HTTP/1.1
Language=
Request=GET

nslookup response:
Server:		192.168.10.1
Address:	192.168.10.1#53

Non-authoritative answer:
155.251.149.3.in-addr.arpa	name = ec2-3-149-251-155.us-east-2.compute.amazonaws.com.

Authoritative answers can be found from:

dig -x response:

; <<>> DiG 9.8.4-P1-RedHat-9.8.4-3.P1.fc16 <<>> -x 3.149.251.155
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 38637
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;155.251.149.3.in-addr.arpa.	IN	PTR

;; ANSWER SECTION:
155.251.149.3.in-addr.arpa. 291	IN	PTR	ec2-3-149-251-155.us-east-2.compute.amazonaws.com.

;; Query time: 1 msec
;; SERVER: 192.168.10.1#53(192.168.10.1)
;; WHEN: Fri Apr 26 11:40:03 2024
;; MSG SIZE  rcvd: 107

dig A response:

; <<>> DiG 9.8.4-P1-RedHat-9.8.4-3.P1.fc16 <<>> A 3.149.251.155
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 35256
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;3.149.251.155.			IN	A

;; AUTHORITY SECTION:
.			10800	IN	SOA	a.root-servers.net. nstld.verisign-grs.com. 2024042600 1800 900 604800 86400

;; Query time: 10 msec
;; SERVER: 192.168.10.36#53(192.168.10.36)
;; WHEN: Fri Apr 26 11:40:03 2024
;; MSG SIZE  rcvd: 106