469
Summary
- // typical exposure
- Anomalous (rarely legitimately open) — The registration has no defining RFC and no documented active deployment, so a responsive 469/tcp does not correspond to a known legitimate service and should be treated as unexpected.
- // analyst note
- an open 469/tcp has no established legitimate use case in current practice; treat as worth investigating rather than routine.
- // if you see it open
- No CVE or vulnerability advisory tied to port 469/tcp is recorded as of an August 2026 search. No malware/Trojan association was found; auditmypc.com's port-469 page did not return fetchable port-specific content during this research, so no claim is made either way. With no confirmed real-world deployment and a blank IANA reference, a live 469/tcp listener is anomalous and should be investigated rather than assumed to be the registered Radio Control Protocol.
About port 469/tcp.
Port 469/tcp is IANA-registered for rcp ("Radio Control Protocol"), but no RFC or public specification backs the name and no current real-world traffic has been documented, so it should not be expected on the public internet and any live listener is worth investigating rather than assuming benign.
The IANA Service Name and Transport Protocol Port Number Registry lists 469 as dual-registered on both tcp and udp under the name rcp, assignee [Jim_Jennings], with the Reference column left blank — meaning IANA cites no defining document for the protocol. This is consistent with a legacy or placeholder-style registration rather than an actively maintained standard.
An August 2026 web search for independent documentation of a deployed "Radio Control Protocol" on this port turned up nothing usable: no vendor docs, blog posts, or forum threads describe software communicating on 469/tcp. A search for "RCP" near port 469 surfaced Yamaha's mixer-console remote-control protocol, which is also informally called "RCP," but Yamaha's own documentation places that protocol on different TCP ports — a name coincidence, not a sighting, and it is not treated as an association with port 469 here.
No CVE or vulnerability advisory tied to port 469/tcp is recorded in a search performed in August 2026. The nmap-services open-frequency data in the repo shows 469/tcp at exactly 0 — a real sampled measurement of "not observed open" rather than a missing row — while 469/udp shows a small nonzero frequency (~0.0007), suggesting whatever residual visibility this registration has is on the udp side, not tcp.
- IANA assignment
rcp— "Radio Control Protocol"; reference (blank — no RFC cited in IANA registry); assignee[Jim_Jennings]; dual-registered 469/tcp + 469/udp [Confirmed] — the IANA Service Name and Transport Protocol Port Number Registry rcp 469/tcp, rcp 469/udp- Range class
- system/well-known (0–1023) [Confirmed] — the IANA Service Name and Transport Protocol Port Number Registry rcp 469/tcp
- Prevalence
- nmap-services open-frequency 469/tcp = 0 (sampled, not observed open); 469/udp ≈ 0.000692 [Confirmed] — this site's own tooling
- Related ports
- 469/udp (dual registration, same
rcpname) [Confirmed] — the IANA Service Name and Transport Protocol Port Number Registry rcp 469/udp
Primary use
registered as "Radio Control Protocol" with no linked RFC or public specification; no confirmed current deployment identified
Other/unofficial uses
none credibly documented; a same-named "RCP" protocol from Yamaha's mixer-console remote control uses different TCP ports and is not linked to port 469
Security implications
no CVE or malware association found as of an August 2026 search; no confirmed live deployment, so a responsive 469/tcp is anomalous
Typically seen on
no confirmed host population; theoretical/legacy IANA registration only [Unknown]
- Analyst note
- an open 469/tcp has no established legitimate use case in current practice; treat as worth investigating rather than routine.
About port 469/udp.
Port 469/udp carries the IANA-registered service rcp ("Radio Control Protocol"); with no confirmed real-world software using it and negligible open-port prevalence, it should be treated as anomalous rather than a service that belongs on the public internet.
IANA registers 469 for both TCP and UDP under the service name rcp, description "Radio Control Protocol," and assignee Jim Jennings. The Reference column is blank in the registry — no RFC or other specification documents the protocol's actual wire behavior, so beyond the name and description little is publicly known about what rcp does or how it communicates.
Measured prevalence backs up the port's obscurity: the repo's nmap-services-derived dataset (this site's own tooling) records an open-frequency of 0.000692 (~0.07%) for 469/udp and exactly 0 for 469/tcp — a real sampled reading of "not observed open," not a data gap.
No vendor documentation, blog post, or forum thread describing software that actually uses 469/udp turned up in an August 2026 search, and SANS ISC's port page shows only sporadic, low-volume scanning activity with no populated CVE entries as of the same search. That combination — a registered-but-undocumented name, near-zero prevalence, and no known legitimate client or server — is what makes an open 469/udp worth flagging rather than assuming benign.
- IANA assignment
rcp— "Radio Control Protocol"; reference (blank — no RFC cited); assignee Jim Jennings; dual-registered 469/tcp + 469/udp [Confirmed] — the IANA Service Name and Transport Protocol Port Number Registry rcp 469/udp- Range class
- well-known (0–1023) [Confirmed] — this site's own tooling (range: "system")
- Prevalence
- nmap-services open-frequency 469/udp = 0.000692 (~0.07%); 469/tcp = 0 (sampled, not observed open) [Confirmed] — this site's own tooling
- Related ports
- no closely related well-known ports identified in the researched context [Unknown]
Primary use
IANA-registered name and description only; no RFC or other spec documents protocol behavior
Other/unofficial uses
none found as of an August 2026 search (no vendor docs, blogs, or forum threads describing software on this port) [Unknown]
Security implications
no CVE or malware association found as of an August 2026 search; SANS ISC shows only sporadic, low-volume scanning with no populated CVE entries
Typically seen on
no established typical deployment identified; treat sightings as rare/anomalous [Unknown]
- Analyst note
- an open 469/udp is statistically rare, carries a blank IANA reference, and has no confirmed legitimate software behind it — investigate rather than assume benign.
Service assignments.
| Name | Protocol | Description | Open frequency |
|---|---|---|---|
| rcp | UDP | Radio Control Protocol | 0.07% |
| rcp | TCP | Radio Control Protocol | 0.00% |
Service assignments from the IANA Service Name and Transport Protocol Port Number Registry, with open-frequency data from nmap-services.