Subnet CalculatorCalculate the network address, broadcast, mask and host range from CIDR notation.Try it >Password GeneratorStrong, random passwords generated locally in your browser.Try it >What is my IP?Your public IP address as seen by the server + browser details.Try it >Is the website down?Checks website availability with a request from our server — not from your connection.Try it >Port CheckerChecks whether a TCP port is open on a host — tested from our server.Try it >Security HeadersHTTP security headers grade (A+…F) and what to fix.Try it >DNS / MX LookupDNS and mail records: A, AAAA, MX, TXT, NS, SOA, CNAME, SPF, DMARC.Try it >
