Help! - lost IP address for website

Hello.

Could you please tell me in more detail what kind of AWS service the website is hosted on?
If you use EC2 or Lightsail, the public IPv4 address may have changed when you start or stop the service, so you will need to reconfigure the IP address for the domain.
You can check the public IPv4 address of EC2 or Lightsail by following the steps described in the document below.
https://docs.aws.amazon.com/lightsail/latest/userguide/understanding-public-ip-and-private-ip-addresses-in-amazon-lightsail.html
https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/using-instance-addressing.html#working-with-ip-addresses

Also, if you are using a dynamic public IPv4 address, the IP address will change every time you start or stop the instance, so I think it is better to obtain an ElasticIP.
https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/elastic-ip-addresses-eip.html#working-with-eips
https://docs.aws.amazon.com/lightsail/latest/userguide/lightsail-create-static-ip.html

By the way, if you use the "dig" command to resolve the domain name, you can check the following IP address.

dig www.wowstockfootage.com

; <<>> DiG 9.16.1-Ubuntu <<>> www.wowstockfootage.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 64488
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

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

;; ANSWER SECTION:
www.wowstockfootage.com. 600    IN      A       205.186.163.109

;; Query time: 95 msec
;; SERVER: 192.168.11.1#53(192.168.11.1)
;; WHEN: Mon Feb 26 09:22:58 JST 2024
;; MSG SIZE  rcvd: 68