Planex Communications Inc. — 6 prefixes (MA-L)

A MAC address beginning with 00:22:CF, 00:90:CC, 44:DC:91, 8C:4C:DC, 1C:C0:35, or E0:9D:B8 belongs to Planex Communications Inc., a Tokyo-based network-equipment maker, and typically identifies consumer or SOHO networking hardware — wireless routers and access points, switches, NAS units, IP cameras, print servers, or LAN adapters.

Planex holds six confirmed MA-L (24-bit) OUI blocks in IEEE's registry, all under the same organization name and clustered around two Ebisu-area addresses in Shibuya-ku, Tokyo. The company is publicly traded on the Japan Exchange (ticker 6784) and maintains an active product catalog, which places it above a bare single-OUI shell registration.

Independent web sources corroborate the device mix: wireless routers/APs, switches, NAS devices, the SmaCam line of IP cameras, print servers, and LAN adapters/NICs. This corroboration rests on a single research angle rather than cross-verified multi-source confirmation, so it is tagged Likely rather than Confirmed.

Two documented security issues touch Planex consumer devices. The MZK-DP150N wireless plug adapter was found by an independent researcher to expose a hidden, undocumented web-shell-like management interface. The SmaCam CS-QR10/CS-QR20 IP cameras carry a low-severity hidden-admin-page flaw (CVE-2017-12576) with no vendor fix noted in the advisory.

IEEE's the IEEE MA-L registry publishes no assignment or registration date for any of the six prefixes — a third-party date (e.g. "Initial registration: 25 October 2008" for 00:22:CF on maclookup.app) is a database artifact, not an IEEE fact, and is not attributed to IEEE here. A direct re-pull of the IEEE registry to independently confirm the OUI-to-company mapping was attempted this cycle but blocked (oui.txt returned no match in the retrieved portion; the IEEE MA-L registry returned HTTP 418), so that specific cross-check stays Unknown pending a retry.

IEEE assignment

6 prefixes → PLANEX COMMUNICATIONS INC., registered Shibuya-ku, Tokyo, Japan [Confirmed] — the IEEE MA-L registry (lines 18512, 18511, 10568, 10022, 26520, 10569)

Registry / block size

MA-L (24-bit OUI) for all six; no MA-M (the IEEE MA-M registry) or MA-S (the IEEE MA-S registry) entries found [Confirmed] — the IEEE MA-L registry, the IEEE MA-M registry, the IEEE MA-S registry

HQ / country

Planex Volta Bldg., 2-11-9 Ebisu-Nishi, Shibuya-ku, Tokyo 150-0021, Japan (latest registry address, prefixes 8C:4C:DC / 1C:C0:35 / E0:9D:B8); earlier prefixes (00:22:CF, 00:90:CC, 44:DC:91) list a nearby F-NISSAY Ebisu Bldg address, same ward [Confirmed] — the IEEE MA-L registry

Company status

active; publicly traded on the Japan Exchange (ticker 6784) [Likely, single-source] — marketscreener.com, bloomberg.com

Device types

wireless routers/APs, network switches, NAS, IP cameras (SmaCam line), print servers, LAN adapters/NICs [Likely] — marketscreener.com, exporthub.com, newegg.com

All 6 prefixes (all MA-L, Planex Communications Inc.)

00:22:CF, 00:90:CC, 44:DC:91, 8C:4C:DC, 1C:C0:35, E0:9D:B8 [Confirmed] — the IEEE MA-L registry

Address anomaly

E0:9D:B8's registry address field contains a garbled country/postal token ("00000 US 1500021") in IEEE's own published data; the address body otherwise matches the other Planex Volta Bldg entries and is not treated as an actual US address [Confirmed] — the IEEE MA-L registry

Security note

MZK-DP150N wireless plug adapter — hidden/undocumented web-shell-like management interface reported by independent researcher Samy (NeroTeam Labs); a CVE ID (2021-37289) appears in a secondary summary but was not independently confirmed against NVD/MITRE, so it stays Unverified

[Likely] — samy.link/blog/a-hidden-web-shell-in-the-plug-in-wireless-planex-mzk-dp150n

Security note

SmaCam CS-QR10 / CS-QR20 IP cameras — CVE-2017-12576 (low severity): hidden/undocumented admin page enabling remote code execution, plus a physical-access serial-console weakness; no official vendor fix noted in the advisory [Likely] — cybersecurity-help.cz/vdb/SB2022090221

OUI registration dates

Unknown per IEEE — the IEEE MA-L registry publishes no assignment-date field; maclookup.app shows "Initial registration: 25 October 2008" for 00:22:CF, which is a third-party database artifact, not an IEEE fact [Unknown / not attributable to IEEE] — maclookup.app/macaddress/0022CF

IANA reference

not applicable / blank — not sourced, not fabricated [Unknown]

Direct IEEE-registry re-verification

not achieved this cycle — oui.txt fetch returned no PLANEX match in the retrieved portion; the IEEE MA-L registry fetch returned HTTP 418 (blocked) [Unknown] — standards-oui.ieee.org/oui/oui.txt, standards-oui.ieee.org/oui/oui.csv