Are you familiar with these DNS records: CAA, URI, LOC Are you familiar with the...

Are you familiar with these DNS records: CAA, URI, LOC


Are you familiar with these DNS records: CAA (Certification Authority Authorization), URI (Uniform Resource Identifier), LOC (Location).

New DNS record

CAA (Certification Authority Authorization)

Certification Authority Authorization (CAA) records allow a domain name holder to specify one or more Certification Authorities (CAs) authorized to issue certificates for that domain. (RFC 6844) Adding a CAA record to a domain allows you to reduce the likelihood of someone obtaining an unauthorized SSL certificate for your domain. CAA records are also inherited by subdomains which means that a CAA record set for will also apply to any subdomain, such as unless it is overridden. Below is an example of a CAA record for a domain which authorizes certificates to be issued by Comodo. CAA 0 issue “”
URI (Uniform Resource Identifier)

A Uri Record is a DNS record used to represent raw actions. A URI consists of a prefix and its contents. The record is a means for publishing mappings from hostnames to URIs. A URI record looks like the below: 90 IN URI 10 1 ""
ftp: service.
tcp: protocol which is the transport protocol of the desired service. It is usually TCP or UDP. name. the domain name for which this record is for.
90: TTL.
10: priority which is the priority of the target host. The lower the value, the higher the priority.
1: weight which is used for records with the same priority. Higher value means more preferred.
"": target which holds the URI of the target enclosed in double-quote.

LOC (Location)

A LOC record specifies geographic location information for a domain name. It contains the following information: Latitude / Longitude. Altitude. Size (diameter of the location described). Horizontal / Vertical precision of the data. A sample record of for the coordinates: 64°22′23″N 38°45′32″W looks like the below: IN LOC 64 22 23.000 N 38 45 32.000 E -2.00m 0.00m 10000m 10m
We are constantly packing new features into our service. If you want other DNS records to be supported, give us a shout in the comments and we will add it for you!

Ron Salazar
June 28, 2018 AT 7:30

I have been with Dynu for many years and it is so encouraging to see that you are adding more and more features. Keep up the good work!


Anthony Cooper
June 29, 2018 AT 11:31

I think CAA record is extremely useful. I myself do not use the other 2 records.


June 29, 2018 AT 17:16

You are absolutely right Anthony! CAA record is the most used of the 3 DNS records.


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