SRV Record Lookup
Look up the SRV records of a service name: which host and port answer for it, in which order. Enter the full _service._proto name.
What the SRV Record Lookup shows
An SRV record tells clients which host and port provide a service for a domain. The name has the form _service._proto.domain - _sip._tcp, _autodiscover._tcp for Outlook, _xmpp-server._tcp, _minecraft._tcp - and the data is priority, weight, port and target.
Clients try the lowest priority first and share load among records of equal priority in proportion to weight. The lookup sorts the records in that order.
Other single-record lookups: TXT Lookup, CNAME Lookup, A Record Lookup, MX Lookup. Paste any record into the DNS Record Explainer for a plain-English breakdown.
Frequently asked questions
How do I look up an SRV record?
Enter the full service name above, for example _sip._tcp.example.com. A bare domain has no SRV records - they always sit on a _service._proto name. From a terminal: dig SRV _sip._tcp.example.com @1.1.1.1 or nslookup -type=SRV _sip._tcp.example.com.
What do priority and weight mean?
Priority picks the order: clients use the lowest number first and fall back to higher ones only when those fail. Weight shares load among records with the same priority: 60 and 40 send about 60% and 40% of clients to each target.
Which services use SRV records?
SIP and VoIP (_sip._tcp, _sip._udp, _sips._tcp), Microsoft 365 and Exchange (_autodiscover._tcp), XMPP chat (_xmpp-client._tcp, _xmpp-server._tcp), LDAP and Kerberos in Active Directory, CalDAV/CardDAV, and Minecraft servers (_minecraft._tcp).
What does a target of "." mean?
A single dot as target says the service is deliberately not offered on this domain, so clients should not look further.