Free professional-grade DNS and network tools. No signup required.
Check whether a DNS change has propagated across 12 public resolvers at once.
Test your records on Canadian resolvers, including CIRA Canadian Shield.
Look up all DNS records for any domain — A, AAAA, CNAME, MX, NS, TXT, SOA.
Look up all TXT records for a domain — SPF, domain verification, and any other text records.
Check the Start of Authority record — primary nameserver, contact, serial number and zone timers.
Check which certificate authorities are permitted to issue SSL certificates for a domain.
Check the DNSSEC public keys published for a domain and whether the answer validates.
Find the authoritative nameservers for any domain.
Find the hostname associated with an IP using PTR records.
Complete list of public DNS servers by country. Find the fastest DNS for your location.
Check mail exchanger records. Verify email routing is configured correctly.
Validate your SPF record to prevent email spoofing.
Verify DKIM signatures and email authentication setup.
Check your DMARC policy to protect from email phishing.
See if a name is free on .ca, .com, .net, .org and more at once.
Registrar, creation and expiry dates, name servers and status from the official registry.
Your public IP address, internet provider and approximate location.
See who an IP address belongs to — network, organisation and country — or check your own IP.
No tools in this category yet.