458
Summary
- // if you see it open
- No CVE or named malware family is documented specifically for 458/tcp as of an August 2026 search. AuditMyPC's per-port pages did not return usable per-port content in this pass (only generic boilerplate), so no malware/trojan verdict is drawn from that source. The deployment model (LAN-only versus internet-reachable) is not documented, so no exposure posture beyond Unknown is asserted.
- // analyst note
- appleqtc is a formally IANA-registered but obscure, seemingly obsolete assignment — an open 458/tcp is uncommon and worth confirming rather than assuming routine QuickTime traffic.
About port 458/tcp.
Port 458/tcp carries appleqtc, IANA's registered name for Apple QuickTime; no research surfaced a documented deployment model for it, so whether it belongs on the public internet is Unknown rather than something this entry will guess at.
IANA registers 458 on both TCP and UDP under the service name appleqtc, description "apple quick time," with assignee/contact Murali Ranganathan. The Reference column is blank (no RFC cited) and no registration or modification date is recorded in the registry.
QuickTime was Apple's multimedia framework of the 1990s-2000s, and the appleqtc name ties to its QuickTime Conferencing-era real-time streaming/conferencing capability. Beyond the IANA record itself, only secondary port-lookup aggregators (SpeedGuide, my-addr.com) were found, and they simply mirror the IANA appleqtc/QuickTime assignment rather than adding independently observed applications or a documented network topology (LAN-only versus internet-reachable).
No RFC defines the protocol and no CVE or named malware family is documented against 458/tcp specifically. Generic port-scanner pages (e.g. AuditMyPC) did not return usable per-port content in this pass — only boilerplate tool descriptions loaded — so no malware/trojan verdict, positive or negative, could be confirmed from that source as of an August 2026 search.
- IANA assignment
appleqtc— "apple quick time"; reference (blank — no RFC cited); assignee Murali_Ranganathan; dual-registered 458/tcp + 458/udp [Confirmed] — the IANA Service Name and Transport Protocol Port Number Registry appleqtc 458/tcp; cross-checked https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml?page=9- Range class
- well-known (0-1023) [Confirmed]
- Prevalence
- nmap-services open-frequency 458/tcp = 0.000314 (~0.0314%); 458/udp = 0.000725 [Confirmed] — this site's own tooling (built from nmap-services)
- Related ports
- none confirmed as a paired/companion assignment
Primary use
registered name for Apple QuickTime (QuickTime Conferencing-era streaming/real-time communication); no protocol specification found beyond the IANA name/description
Other/unofficial uses
none confirmed; secondary aggregators only mirror the IANA appleqtc assignment
Security implications
no CVE or named malware family documented for 458/tcp; AuditMyPC pages did not return usable per-port content, so no malware verdict is drawn from that source
Typically seen on
Unknown — no current, actively maintained software was found attributed to this port; appears effectively obsolete [Unknown]
- Analyst note
- appleqtc is a formally IANA-registered but obscure, seemingly obsolete assignment — an open 458/tcp is uncommon and worth confirming rather than assuming routine QuickTime traffic.
About port 458/udp.
Port 458/udp carries the IANA-registered service appleqtc ("apple quick time"); no current legitimate application is documented for it, so a responsive host should be treated as anomalous rather than as something expected to face, or be reached from, the public internet.
The IANA registry lists 458/udp under the service name appleqtc, description "apple quick time," assignee and contact [Murali_Ranganathan]. The Reference column is blank — no RFC is cited — and no registration or modification date is recorded. The identical service name appleqtc is dual-registered on 458/tcp under the same assignee.
Beyond the bare registry entry, the name points to Apple QuickTime Conferencing, a mid-to-late-1990s Apple product; no independent protocol specification was found describing 458/udp's wire format or behavior. Port-lookup aggregators (WinTelGuy, t1shopper, adminsub.net) checked in an August 2026 search all restate the same IANA registration rather than report independently observed software, so no application beyond QuickTime itself can be credited with traffic on this port.
nmap-services measures 458/udp's open-frequency at 0.000725 (~0.0725%) and the sibling 458/tcp at 0.000314 (~0.0314%) — both near-zero, consistent with a legacy, essentially-unused registration rather than an actively deployed service.
No CVE or malware/trojan association is recorded for port 458 as of an August 2026 search, and no port-458-specific scanning or honeypot writeup was found. auditmypc.com's port-458 pages returned only generic tool-description boilerplate rather than a port-specific verdict when checked, so no finding — positive or negative — is drawn from that source here.
- IANA assignment
appleqtc— "apple quick time"; reference (blank — no RFC cited); assignee/contact[Murali_Ranganathan]; dual-registered alongside 458/tcp (same service nameappleqtc, same assignee) [Confirmed] — the IANA Service Name and Transport Protocol Port Number Registry appleqtc 458/udp- Range class
- well-known/system (0–1023) [Confirmed] — this site's own tooling
- Prevalence
- nmap-services open-frequency 458/udp = 0.000725 (~0.0725%); sibling 458/tcp = 0.000314 (~0.0314%) [Confirmed] — this site's own tooling
- Related ports
- 458/tcp (
appleqtc, sibling registration, same assignee)
Primary use
Likely Apple QuickTime Conferencing (mid-to-late 1990s Apple product); no independent protocol specification found beyond the IANA service-name registration
Other/unofficial uses
none documented; port-lookup aggregators (WinTelGuy, t1shopper, adminsub.net) merely restate the IANA registration rather than reporting observed software [Unknown] — https://wintelguy.com/port-search/458, http://www.t1shopper.com/tools/port-number/458/, https://www.adminsub.net/tcp-udp-port-finder/appleqtc
Security implications
no CVE or malware/trojan association recorded as of an August 2026 search; no port-458-specific scanning/exposure writeup found; auditmypc.com returned only generic boilerplate (no port-specific verdict retrievable), so no finding drawn from it
Typically seen on
no documented modern legitimate deployment; legacy Apple QuickTime Conferencing era hosts historically, otherwise anomalous if seen [Unknown]
- Analyst note
- An open 458/udp has no confirmed modern legitimate use — treat as anomalous, verify against the host's actual role, and cross-check the TCP sibling before dismissing as background noise.
Service assignments.
| Name | Protocol | Description | Open frequency |
|---|---|---|---|
| appleqtc | UDP | apple quick time | 0.07% |
| appleqtc | TCP | apple quick time | 0.03% |
Service assignments from the IANA Service Name and Transport Protocol Port Number Registry, with open-frequency data from nmap-services.