2600:1f28:365:80b0:86f9:c461:5987:c26dThis is the free Robtex what-is-my-IP echo service. It answers with the public IP address your request came from — useful for scripts, monitors and humans alike. CORS is open and there are no rate limits for reasonable use.
2600:1f28::/36You are using http. You can also reach this via https: https://ip.robtex.com/html
No DNS or TLS needed: http://46.255.120.53/ip and http://[2a00:9c00:120::53]/ip hit the same anycast service by IP literal — handy when your resolver or clock is broken.
The DNS-based siblings echo your resolver instead of your client IP: dig +short dnsip.robtex.com (or dnsipv4 / dnsipv6), and dig txt dnsip.robtex.com for resolver PTR/ASN/EDNS details.