313

Port 313/tcp (paired with an identical 313/udp registration) is assigned by IANA to a service labeled "magenta-logic" ("Magenta Logic"), but no public documentation, vendor page, or protocol specification describing an actual product or use case was found, so whether this port belongs on the public internet cannot be confirmed from available sources — treat any host answering on 313/tcp as unidentified until investigated directly.

The IANA registry lists the assignee and contact as Karl Rousseau, with the Registration Date, Modification Date, and Reference (RFC) fields all blank. There is no RFC defining this service and no date on record in the registry, and none should be inferred or invented.

Secondary port-list aggregators (SpeedGuide, adminsub.net, tcp-udp-ports.com, auditmypc.com) simply restate the IANA name without adding verifiable technical detail. One legacy site, auditmypc.com, tags TCP port 313 as not associated with a known virus or trojan, though it carries the standard caveat that this does not rule out unauthorized use.

No CVE, malware family, or Shodan/Censys scanning-prevalence figure specific to 313/tcp turned up in this research pass, so internet-exposure volume and any real-world security history for this port remain genuinely Unknown rather than assumed absent.

IANA assignment

magenta-logic — "Magenta Logic"; reference (blank — no RFC cited in IANA registry); assignee/contact [Karl_Rousseau]; dual-registered 313/tcp + 313/udp [Confirmed] — IANA Service Name and Transport Protocol Port Number Registry

Range class

well-known (0–1023) [Confirmed]

Prevalence

Unknown — no Shodan/Censys or nmap-services prevalence figure located for 313/tcp or 313/udp [Unknown]

Related ports

none documented

Primary use

Unknown — no public documentation of an actual protocol or product beyond the bare IANA service label

Other/unofficial uses

none confirmed; 313/udp carries an identical registration; some secondary port-list sites speculate a broadcast/audio-automation association but no primary source confirms this

Security implications

no confirmed malware or CVE; one legacy aggregator (non-authoritative) lists it as not virus-associated; real-world exposure history is undocumented

Typically seen on

Unknown — no documented deployment context found [Unknown]

Analyst note

An open 313/tcp or 313/udp cannot be attributed to a known product from public sources; verify via banner-grab or direct service fingerprinting before assuming benign or malicious intent.

Port 313/udp is registered with IANA under the name magenta-logic, but no vendor, product, or protocol specification could be found describing what actually runs on it, so this port should be treated as internal/unknown rather than something to expose to the public internet.

The IANA Service Name and Transport Protocol Port Number Registry lists 313/udp as magenta-logic with description "Magenta Logic" and assignee/contact Karl_Rousseau. The Registration Date, Modification Date, and Reference (RFC) fields are all blank in the live registry — no RFC governs this assignment, and no dated registration event is recorded, so those fields stay null rather than guessed.

313/tcp carries the identical registration (same name, description, assignee, and equally blank supporting fields), confirming this is a routine dual-registration rather than two independent assignments.

General web research turned up no software, appliance, or documented protocol implementing magenta-logic; secondary port-lookup sites (SpeedGuide, AdminSub) simply mirror the IANA name with no added detail. No CVEs or malware families are associated with the port. Historical nmap-services data shows an extremely low but nonzero observed-frequency value for 313/udp, consistent with an obscure or largely unused assignment rather than a widely deployed service. Given the total absence of a known implementation, an analyst encountering unexpected traffic on this port should treat it as unidentified and investigate rather than assume a specific product.

IANA assignment

magenta-logic — "Magenta Logic"; assignee/contact Karl_Rousseau; reference (blank — no RFC) [Confirmed] — the IANA Service Name and Transport Protocol Port Number Registry; https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.csv

Range class

well-known (0–1023)

Registration/modification date

Unknown (blank in registry) [Confirmed] — the IANA Service Name and Transport Protocol Port Number Registry

Dual registration

313/tcp also registered as magenta-logic, identical assignee/contact, all other fields equally blank [Confirmed] — the IANA Service Name and Transport Protocol Port Number Registry

Prevalence

nmap-services observed-frequency for 313/udp ≈ 0.000297 (313/tcp ≈ 0.000000); source snapshot date not stated [Likely] — https://raw.githubusercontent.com/nmap/nmap/master/nmap-services

Common software

Unknown — no vendor/product found implementing this service; secondary port databases only mirror the IANA name

Security implications

no CVEs or malware associated with 313/udp found; AuditMyPC reports no known virus/trojan association

Exposure/scan telemetry

Unknown — no port-specific exposure data found via general web search [Unknown]

Analyst note

with no documented implementation, treat unexpected activity on 313/udp as unidentified and worth investigating.