Confirm the addresses, mail routes and name-server records published for a domain.
Network utilities
Network Diagnostics Suite
Run DNS lookup, ping, traceroute, reverse DNS, TCP port checks, RDAP and IP checks from one place. For connection performance, use our Internet & WiFi Speed Test.
DNS & RDAP lookup Bounded diagnostics Public targets only
Need connection performance results? Measure latency, download and upload on the dedicated speed test.
Open Speed Test
TCP Port Check
Check whether common TCP service ports respond on a public domain or IP address you are authorized to test.
Need an IP location map?
Use the dedicated tracker for current-IP detection, location fallback and map results.
DNS Lookup
Ping, Traceroute and Reverse DNS
Run these diagnostics only for infrastructure you own or are authorized to test.
IP Lookup (RDAP)
Bandwidth Parameter Converter
Enter a positive bandwidth value to convert between BPS, KBPS, MBPS and GBPS.
Diagnostic guide
Choose the right network check
Each test answers a different troubleshooting question. Begin with the narrowest check that matches the problem.
Check basic reachability and round-trip response to a public destination.
Inspect the routed path when latency or reachability changes between networks.
Review public registration details for an IP range or domain.
Test an authorized public TCP service such as web, mail or remote access.
Translate line-rate units without confusing bits and bytes.