Dynamic DNS Tools — a client/server for remote authenticated DNS updates, dormant since 2013.
IANA assigns 1052 to ddt, "Dynamic DNS Tools", a small C++ client/server project that let clients push authenticated updates into a DNS zone before RFC 2136 dynamic update and nsupdate became the standard way to do that. The project shipped as ddt-client and ddt-server in Debian and was last released in 2013; SourceForge marks it inactive. You will rarely meet a live ddt-server today. A listener on 1052 is more often an unrelated application than this project, so fingerprint before you conclude.
Do not expose
A service whose whole job is writing DNS records, with no upstream maintenance since 2013 — do not put it on a public interface; use RFC 2136 with TSIG instead.
$ nmap -Pn -sV -p 1052 TARGETSeen this on your network? Beige Box scans your Wi-Fi and shows every open port on every device — and its Ports tool links straight back here.
Get Beige Box →also available as JSON · Markdown
Corrections or a missing port? Reply @rimrocksystems.