DNS using all of my cellular data

Think of DNS as the Internet's phone book. Anytime you enter a URL in a web browser or attempt to access your email, a request is made to a DNS server to find the actual location of the web site or email server to establish communications. Stop or limit doing both of these activities will reduce the number of DNS requests.

Alternatively, you would need to enter the actual IP address of the web site or email server to avoid using DNS.

To add, if you are in the habit of clearing website data (or using private mode browsing) your phone will do many more DNS lookups as either of these activities clears the phone’s cache of completed DNS lookups.

Per chance to you have automatic app updates enabled? This could be one reason.

Did you check to see which apps are enabled to use cellular data?

Try disabling it and see if the amount of DNS request drop. If it does, then you will need to decide how important this feature is to you vs. your cellular data usage costs.

Maginnis1951 wrote:

I don’t have the cellular auto updates enabled. I have enabled the minimum number of apps for cellular data. Mail, maps, Safari, Face Time, Find my phone, Starbucks.

For "Find My" did you also enable Share My Location?

Unfortunately, there is no simple way to capture the data traffic coming from your phone to help identify the culprits.