If this tool helped you, you can buy us a coffee ☕
Lookup CERNET public DNS server IP addresses and locations to optimize domain resolution speed for education network users.
IP to Number Converter
Convert IP addresses to decimal integers and vice versa. Supports both IPv4 and IPv6 formats. Ideal for development, debugging, and network analysis.
Random IP Address Generator
Generate IPv4 and IPv6 addresses on demand. Supports specific public/private networks and custom CIDR ranges. Ideal for testing, development, and learning.
RIPEMD Hash Generator
Generate RIPEMD-128, RIPEMD-160, RIPEMD-256, and RIPEMD-320 hashes online. Supports text, Hex, and Base64 inputs.
IPv6 Address Compressor
Compress IPv6 addresses to their shortest RFC-compliant format by removing redundant zeros. Perfect for network configuration and address management.
IP to Number Converter
Convert IP addresses to decimal integers and vice versa. Supports both IPv4 and IPv6 formats. Ideal for development, debugging, and network analysis.
Random IP Address Generator
Generate IPv4 and IPv6 addresses on demand. Supports specific public/private networks and custom CIDR ranges. Ideal for testing, development, and learning.
RIPEMD Hash Generator
Generate RIPEMD-128, RIPEMD-160, RIPEMD-256, and RIPEMD-320 hashes online. Supports text, Hex, and Base64 inputs.
IPv6 Address Compressor
Compress IPv6 addresses to their shortest RFC-compliant format by removing redundant zeros. Perfect for network configuration and address management.
IPv4 / IPv6 Address Converter
A two-way IPv4 and IPv6 address converter for network configuration, debugging, and format validation.
Education network users often face high domain resolution latency. This tool provides an IP address database of public DNS servers for the China Education and Research Network (CERNET), including start IPs, end IPs, and server locations. Each DNS entry corresponds to a resolution service node of a specific university or research institution. CERNET users can configure these IPs to achieve faster, localized domain resolution.
Are CERNET DNS servers universally applicable?
No. They are only suitable for the CERNET network environment. Non-CERNET users may experience resolution failures if they use them.
How can I verify the validity of a DNS server?
We recommend using the dig command to test response speeds or contacting your institution's network center for real-time status. While this database is updated periodically, changes in the network environment may cause individual nodes to become invalid.
• For CERNET users only.
• Backup your original DNS settings before making changes.
• IP ranges may change due to network adjustments.
• Bulk queries and API calls are not supported.
CERNET users should prioritize DNS servers from universities in the same city (e.g., Beijing users should choose RUC's 202.112.112.10). When configuring, note that identical Start and End IPs indicate a single-node server; if an IP range is shown (e.g., 202.203.144.33-34), verify that the institution supports multi-node load balancing. Typical configuration example: Setting Huazhong University of Science and Technology's DNS (202.114.0.242) as an alternate DNS can improve the resolution efficiency of .edu.cn domains.
