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CIDR & Subnet Calculator
Calculate network address, broadcast, subnet mask, wildcard mask and usable host range.
Open Tool →Simple, fast and practical tools for system administrators, developers, website owners and small businesses.
Calculate network address, broadcast, subnet mask, wildcard mask and usable host range.
Open Tool →Calculate the number of IPv4 addresses between a starting and ending IP.
Open Tool →Analyze IPv4 addresses and view public network, ASN, provider and country information.
Open Tool →Validate, expand, compress and analyze IPv6 addresses and network prefixes.
Open Tool →Check common DNS records and troubleshoot domain configuration.
Open Tool →Inspect mail exchange records and basic email-domain configuration.
Check email authentication records and identify common configuration issues.
Check website availability, performance, HTTPS, redirects and technical health.
Check certificate validity, issuer, expiry date and TLS information.
Inspect important website security headers and configuration.
Generate strong random passwords locally in your browser.
Decode JSON Web Tokens locally without sending them to a server.
Format, validate and inspect JSON data directly in your browser.
Encode and decode URLs and query strings quickly.
Convert Unix timestamps to readable dates and back.
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