Find the host and port for a domain's services, with priority and weight.
Enter a domain to look up its SRV records.
An SRV (Service) record specifies where a particular service runs: its hostname, port, priority, and weight. Protocols like SIP, XMPP, LDAP, and Microsoft 365 autodiscover rely on SRV records for service discovery.
SRV names follow the pattern _service._protocol.domain. This tool resolves the SRV record for whatever name you enter and lists each target with its port.
Enter the full SRV name, which follows the format _service._protocol.example.com, for example _sip._tls.example.com. Unlike A or MX records, SRV records live at these underscore-prefixed names.
Priority works like MX: lower is tried first. Weight distributes load among records of equal priority, so a record with weight 20 receives roughly twice the traffic of one with weight 10.
Common users include SIP and VoIP, XMPP chat, LDAP, Minecraft servers, and Microsoft 365 autodiscover. If a protocol supports SRV-based discovery, clients can find the service without a hardcoded host and port.
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