Browserside Network Tools
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Network Tools

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Fast. Free. Browser-based.

Browserside Network Tools

5 utilities across network. Tools run in your browser. DNS lookups query public resolvers: Cloudflare first, with Google Public DNS as a fallback; calculations stay on your device.

All tools

  1. DNS Lookup network Look up common DNS records for a domain.
  2. MX Lookup network Check mail exchanger records for a domain.
  3. SPF Checker network Find SPF records and included domains for an email-sending domain.
  4. CIDR Calculator network Break down a CIDR block into network, mask, and usable host range.
  5. Subnet Calculator network Calculate subnet details from an IP address and mask.

More free tools at Browserside Tools.