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SRV Record Lookup
An SRV record says where a service runs: its host, port, priority and weight. The name encodes the service and protocol, as in _sip._tcp.example.com, so clients can find a server without being told its address.
About SRV records
What the answer tells you
- The value reads: weight, port, target. Priority is shown in its own column, and the lowest is tried first.
- Weight shares the load between records of equal priority: one with weight 60 gets three times the traffic of one with 20.
- Look up the full name, including the leading _service._protocol labels. A plain domain name has no SRV records.
_sip._tcp.example.com. 3600 IN SRV 10 60 5060 sip.example.com.
Record types
Look up any record type
Each type has a page of its own, explaining what the record does and what to look for in the answer.
- AA Record LookupIPv4 address
- AAAAAAAA Record LookupIPv6 address
- CNAMECNAME LookupAlias
- MXMX LookupMail servers
- TXTTXT Record LookupText, SPF and DMARC
- NSNS LookupNameservers
- SOASOA Record LookupZone authority
- CAACAA Record LookupCertificate authorities
- SRVSRV Record LookupService locations
- PTRReverse DNS LookupReverse DNS (PTR)
Questions
Frequently asked questions
- The lookup shows nothing for my domain
- SRV records live at a service name, not at the domain itself. Enter the full name, such as _sip._tcp.example.com or _minecraft._tcp.example.com.
- Which services use SRV records?
- SIP and VoIP, XMPP chat, LDAP and Kerberos in Active Directory, CalDAV and CardDAV, mail client autodiscovery, and game servers such as Minecraft, among others.
- What is DNS propagation?
- DNS does not push changes out. Each resolver keeps an answer for its TTL and only asks again once that runs out, so after a change different resolvers return old and new answers for a while. When every column here agrees with the authoritative one, the change has reached them.
- What does the authoritative column show?
- The answer from one of the domain's own nameservers, which never comes from a cache. It shows what the zone says right now; the resolver columns show what the internet has cached.