There are several public Domain Name System (DNS) servers that can be used to resolve domain names to IP addresses. Some popular options include:
- Google Public DNS: 8.8.8.8 and 8.8.4.4
- Cloudflare: 1.1.1.1 and 1.0.0.1
- OpenDNS: 208.67.222.222 and 208.67.220.220
- Quad9: 9.9.9.9 and 149.112.112.112
It's generally a good idea to use multiple DNS servers for redundancy and to improve the reliability and performance of your internet connection. You can configure your operating system or router to use these public DNS servers, or you can use a third-party service such as OpenDNS or Cloudflare to protect against cyber threats and improve the speed of your internet connection.