Network tools

13 free network tools. No account needed.

• What is my IP

  Find your public IP address with detailed geographic location, ISP provider, and network information

  ip · ip-address · geolocation · isp

• What is my DNS

  Check DNS propagation and verify DNS records from multiple global locations to ensure your domain changes have propagated worldwide

  dns · dns-propagation · dns-lookup · nameserver

• Domain Lookup

  View DNS records, nameservers, and zone file information for any domain

  dns · domain · nameserver · dns-records

• WHOIS Lookup

  Query WHOIS database for domain registration and ownership information

  whois · domain · registration · registrar

• SMTP Tester

  Verify SMTP credentials and send a real test email from any mail server

  smtp · email · mail · sendgrid

• SPF Record Merger

  Merge a new sender into your existing SPF record and check it against the 10 DNS lookup limit

  spf · email · dns · txt-record

• IPv4 subnet calculator

  Parse your IPv4 CIDR blocks and get all the info you need about your subnet

  ipv4 · subnet · calculator · cidr

• IPv4 address converter

  Convert an IP address into decimal, binary, hexadecimal, or IPv6 representation

  ipv4 · converter · ip-address · decimal

• IPv4 range expander

  Calculate a valid IPv4 subnet with CIDR notation from start and end addresses

  ipv4 · subnet · cidr · calculator

• MAC address lookup

  Find the vendor and manufacturer of a device by its MAC address

  mac-address · lookup · vendor · oui

• MAC address generator

  Generate random MAC addresses with configurable quantity, prefix, case, and separator

  mac-address · generator · random · networking

• IPv6 ULA generator

  Generate your own local, non-routable IPv6 addresses for your network according to RFC4193

  ipv6 · ula · generator · rfc4193

• Tunnel providers

  Compare tunnel providers to expose your local dev server to the internet with licensing and pricing info

  tunnel · ngrok · cloudflare · localtunnel