No SRV records found for 89.2.
id 4563, opcode QUERY, rcode NXDOMAIN, flags QR RD RA ;QUESTION 89.2. IN SRV ;ANSWER ;AUTHORITY . 86276 IN SOA a.root-servers.net. nstld.verisign-grs.com. 2024103101 1800 900 604800 86400 ;ADDITIONAL
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Service Records or SRV record lookups are used to determine the SRV records associated with a domain.
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SRV records, known as Service records are used to store information relating to hostname, port and protocol details for applications or services which are serviced by the domain.
For example, SRV records can be used to store the location of services required for Internet applications such as Voice over Internet Protocol (VoIP) or messaging services using the Extensible Messaging and Presence Protocol (XMPP)
An example SRV record may look like the following:
Record | Type | Priority | Weight | Port | Target | TTL |
---|---|---|---|---|---|---|
_sip._tcp.example.com | SRV | 10 | 20 | 5060 | sip1.example.com | 3600 |
_sip._tcp.example.com
represents identifier of the record. This is broken down further into 3 sections. _sip
represents the name of the service. _tcp
represents the protocol of the service, this is usually either TCP or UDP. example.com
represents the domain in which this record is for.
SRV
is the record type.
10
is the priority of the record. The lower the value, the higher the priority.
20
is the weight of the record. This is the weight of which this record has a chance to be used when there are multiple matching SRV records of the same priority.
5060
is the port of the record. This specifies the port on which the application or service is running.
sip1.example.com
is the target of the record. This specifies the domain of the application or service the record is for. SRV records must specify a target which is either an A record or AAAA record, and may not use CNAME records.
3600
is the TTL (time to live) of the record in seconds, this example represents 1 hour. This means that when a record has had updates made to it, then it will take 1 hour to update.