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SIP DNS Checker

SIP DNS Checker focuses on the DNS records used by SIP endpoints and providers. It helps confirm whether a VoIP domain advertises the expected signaling targets.

What It Checks

  • SIP and SIPS SRV records.
  • NAPTR records when published.
  • Priority, weight, port, and target host details.
  • Missing records that can break domain-based SIP routing.

When To Use It

Use it when SIP registration fails, a domain-based trunk does not route, a provider asks for SRV validation, or endpoints cannot discover the correct proxy.

Related Checks

  • Use DNS Lookup for A/AAAA records behind the SRV targets.
  • Use Port Checker for TCP/TLS SIP ports.
  • Use SIP Call Flow Analyzer if signaling reaches the endpoint but calls fail.