>• ipconfig.is

DNS propagation checker

Has a DNS change gone live? Compare 12 public resolvers around the world, including China and Russia, with what each of the zone's own nameservers publishes right now.

What it checks

• 12 public resolvers worldwide
• Every one of the zone's nameservers
• SOA serials in sync or not
• Answers that differ, highlighted

The same check from the command line

curl "ipconfig.is/propagation?name=github.com&type=A"

All tools

• Domain security audit: TLS certificate, chain and versions
• DNS lookup: 20 record types, A to DNAME
• DNS propagation checker: 12 public resolvers worldwide
• TLS certificate checker: Validity and days remaining
• SPF, DKIM and DMARC checker: SPF with the 10-lookup limit
• HTTP redirect checker: Every redirect hop
• Domain WHOIS lookup: Registrar and registration date
• Subnet calculator: Network, broadcast and usable range

Every tool is also a key-free API call: see the API reference.