tmnxMobPdnApnPcoDnsV4PriAddr 1.3.6.1.4.1.6527.3.1.2.71.1.10.1.19

The value of tmnxMobPdnApnPcoDnsV4PriAddr specifies the IPv4 address of the primary DNS server used by a User Equipment (UE) to resolve domain names to IP addresses.