All Tools / Network & Sysadmin Tools
DNS lookup, WHOIS, SSL checker, port scanner, speed test and other network utilities.
Categories
Check if an IP belongs to a VPN, proxy or datacenter
Plot any IP or domain on an interactive world map
Look up DNS records for any domain
Look up domain registration information
Check SSL/TLS certificate details
View HTTP response headers for any URL
Ping a host or trace the network route
Send HTTP requests and inspect responses
Scan open ports on a host
Calculate subnet mask, host range from CIDR
Convert between numeric and symbolic Unix permissions
Parse browser user agent strings
Measure download, upload speed and latency
Continuous ping test with jitter and packet loss stats
Estimate transfer time and required bandwidth
See which 2.4 / 5 GHz channels are least congested
Validate SPF, DKIM, DMARC and MX records
Check if an IP or domain is on spam blacklists