How do I set up a SRV record on my domain?

This article will show you how to add a SRV Record to your domain name.

A SRV record is a DNS entry that specifies information about a service that is available on your domain, most important, being the location of the service inside that domain.

Firstly, you need to ensure your domain is pointed to the 123 Reg nameservers. Otherwise, you will not be able to configure the DNS zonefile.

Please note: It will take between 24-48 hours for any new nameserver (DNS) records to become active.

Step 1 of 10

Start by logging in to your 123 Reg Control Panel.


Step 2 of 10

From there, select your desired domain from the drop-down menu within the Manage Active Products section and click Manage.

Alternatively, you can scroll down to the Domain names section and select the relevant domain name from the drop-down menu. Once selected, click Manage.

Select Manage


Step 3 of 10

Scroll down to the Advanced Domain Settings section and click Manage DNS.


Step 4 of 10

Select the Advanced DNS tab near the top.


Step 5 of 10

For your new record, choose SRV from the Type drop-down list.


Step 6 of 10

Your host name specifies the name of the server providing the service. This can be either: or you can take the domain away to show just _sip.

Please note: When entering the long form host name (for example: it is important to add the full stop at the end of the Host name.

Step 7 of 10

The priority represents the prominence the record gets given. This can range from 0 to 65535, with 0 being the highest priority.

Step 8 of 10

Your TTL specifies how long the record takes to resolve. This should be measured in seconds, for example, one hour equals 3600 seconds, so your TTL would be 3600.

Step 9 of 10

Your destination is where the traffic is being sent to. This should show the Weight followed by the Port, and then the domain name. The values must be separated with a space and should be displayed like this: 1 5061

Step 10 of 10

When complete, click the Add button. Your SRV record will now be created.

Please note: Some services, such as Microsoft 365, will require multiple SRV records to be created.

In order to verify your domain name with Microsoft 365, two SRV records will need to be added:

1. sip SRV record

hostname: _sip._tls

priority: 100

TTL: 3600

destination SRV: 1 443

2. sipfederation SRV record

hostname: _sipfederationtls._tcp

priority: 100

TTL: 3600

destination SRV: 1 5061

Once created, they should look something like this: