Embodiments relate to systems, devices, and computing-implemented methods for providing improved domain data operations by receiving, from a device, a request for domain data associated with a domain name (e.g., RDAP domain data); transmitting a domain data request to a domain data server associated with a domain name registry corresponding to the domain name; receiving a domain data response from the domain data server that includes primary domain data associated with the domain name; obtaining supplementary domain data associated with the domain name; generating merged domain data by merging the primary domain data with the supplementary domain data; and transmitting the merged domain data to the device.