466
Summary
- // if you see it open
- No CVE or named malware family is documented for 466/tcp as of an August 2026 search. auditmypc.com's tcp-port-466/udp-port-466 pages carry the site's standard templated framing but did not yield a port-specific verdict line on repeated fetch. The mthcht/awesome-lists suspicious_ports_list.csv (a maintained community list of malware/C2-associated ports) has no entry for port 466. No credible source ties 466/tcp to malware, but this is an unknown/negative finding rather than a confirmed clean bill of health, since the protocol's actual function is also undocumented.
- // analyst note
- an open 466/tcp carries a registered name (digital-vrc) but no documented function — investigate rather than assume routine traffic; legitimate use cannot be confirmed either way.
About port 466/tcp.
Port 466/tcp is registered with IANA under the bare service name digital-vrc, but no primary source documents what the protocol actually does, so no internet-facing/restricted/internal-only exposure classification can be confirmed — this entry records the registration itself and marks exposure Unknown rather than guessing.
IANA registers 466 on both TCP and UDP as digital-vrc, assignee Peter_Higginson, with a blank Reference column and no registration or modification date recorded. The registry entry consists of nothing beyond the service name itself; no RFC or protocol description is cited anywhere in the record.
An August 2026 search for community-sourced sightings of software, games, or clients using port 466 (a general web search plus the mthcht/awesome-lists suspicious_ports_list.csv on GitHub) found nothing attributable to this port. No specific application, protocol behavior, or deployment context could be confirmed from any primary or secondary source.
No malware or trojan association is recorded for port 466 in the sources checked. auditmypc.com's tcp-port-466 and udp-port-466 pages carry the site's standard templated framing on repeated fetch but did not yield a port-specific verdict line; the mthcht/awesome-lists suspicious-ports CSV has no row for 466. SpeedGuide.net's port page returned HTTP 403 on fetch and could not be read, so it supports no claim here.
Given the total absence of documented protocol behavior, an open 466/tcp is best treated as an unknown quantity if observed — worth investigating rather than assumed benign or assumed malicious.
- IANA assignment
digital-vrc— no description beyond the service name; reference (blank — no RFC cited); assignee Peter_Higginson; dual-registered 466/tcp + 466/udp [Confirmed] — the IANA Service Name and Transport Protocol Port Number Registry digital-vrc 466/tcp- Range class
- well-known (0–1023) [Confirmed]
- Prevalence
- nmap-services open-frequency 466/tcp ≈ 0.000025; 466/udp ≈ 0.000297 [Confirmed] — this site's own tooling (built from nmap-services)
- Related ports
- none confirmed as a paired service in the registry [Unknown]
Primary use
Unknown — no protocol documentation found beyond the bare IANA registration
Other/unofficial uses
none confirmed; no community-sourced sightings surfaced in an August 2026 search
Security implications
no CVE or malware family documented for 466/tcp as of an August 2026 search; auditmypc.com's templated page yielded no port-specific verdict on repeated fetch; mthcht/awesome-lists suspicious_ports_list.csv has no row for 466 [Unknown] — https://www.auditmypc.com/tcp-port-466.asp, https://github.com/mthcht/awesome-lists/blob/main/Lists/suspicious_ports_list.csv
Typically seen on
Unknown — no confirmed deployments or applications found [Unknown]
- Analyst note
- an open 466/tcp carries a registered name (digital-vrc) but no documented function — investigate rather than assume routine traffic; legitimate use cannot be confirmed either way.
About port 466/udp.
Port 466/udp is IANA-registered under the service name digital-vrc, but no protocol specification or real-world application has ever been identified for it, so there is no legitimate basis for exposing it to the public internet — an open port 466/udp is best treated as anomalous and worth investigating rather than assumed benign.
The IANA registry entry itself is minimal: the description field simply repeats the service name digital-vrc, the assignee is listed as Peter Higginson, and the Reference column is blank — no RFC or vendor specification is cited. The service is dual-registered on both 466/tcp and 466/udp, and no registration or modification date is recorded.
The name digital-vrc and its association with Peter Higginson point toward a 1990s-era Digital Equipment Corporation (DEC) registration, but an August 2026 web search turned up no RFC, vendor document, or protocol writeup describing what the service actually does. Port-lookup aggregator sites echo only the bare IANA name with no expanded detail.
No application or software has been credibly tied to traffic on this port, and no CVE or exposure writeup was found for it. The port does not appear to be a known malware or backdoor channel; the negative check below is the only relevant data point.
The nmap-services open-frequency figure for this port is low but nonzero, consistent with an obscure, rarely-deployed legacy registration rather than an actively used service.
- IANA assignment
digital-vrc— description field repeats the service name only; reference (blank); assignee Peter Higginson; dual-registered 466/tcp + 466/udp [Confirmed] — the IANA Service Name and Transport Protocol Port Number Registry digital-vrc 466/udp- Range class
- well-known (0–1023) [Confirmed] — this site's own tooling (range: "system")
- Prevalence
- nmap-services open-frequency 466/udp ≈ 0.000297 (~0.03%); 466/tcp ≈ 0.000025 (~0.0025%) [Confirmed] — this site's own tooling
- Related ports
- 465/tcp and 465/udp; 467/tcp and 467/udp (adjacent port numbers; no established functional relationship) [Confirmed] — the IANA Service Name and Transport Protocol Port Number Registry
Primary use
no protocol specification or RFC found describing digital-vrc's function; name and assignee suggest a legacy Digital Equipment Corporation (DEC) registration
Other/unofficial uses
none identified as of an August 2026 search [Unknown] — https://www.speedguide.net/port.php?port=466, http://ports.my-addr.com/tcp_port-udp_port-application-and-description.php?port=466
Security implications
no malware/trojan association could be established — auditmypc.com's page carries only the site's standard templated framing, not a port-specific verdict; no CVE or exposure writeup found; no documented legitimate use, so an open instance is anomalous
Typically seen on
no known typical deployment; legacy DEC-associated IANA registration with no documented modern usage
- Analyst note
- An open port 466/udp has no confirmed legitimate use in current documentation — treat as an anomaly worth investigating rather than a normal service.
Service assignments.
| Name | Protocol | Description | Open frequency |
|---|---|---|---|
| digital-vrc | UDP | — | 0.03% |
| digital-vrc | TCP | — | 0.00% |
Service assignments from the IANA Service Name and Transport Protocol Port Number Registry, with open-frequency data from nmap-services.