ARIMA Communications Corp. — 5 prefixes (MA-L ×3, MA-M ×2)

A MAC address beginning with 00:0D:92, 40:BA:61, or 00:E6:66 belongs to ARIMA Communications Corp., a Taiwan-based OEM/ODM wireless-communications manufacturer. Two smaller MA-M sub-allocations, A0:19:B2:7/28 and 98:F9:C7:7/28, are registered to the same company beneath IEEE-held shared bases. It is typically seen on contract-built mobile phones, industrial tablets, networking gear, or cellular/RF modules shipped under another company's brand, not under a consumer-facing "Arima" label.

The IEEE registry holds five separate blocks under this registrant: three MA-L (24-bit) prefixes — 00:0D:92, 40:BA:61, 00:E6:66 — and two MA-M (28-bit) prefixes — A0:19:B2:7/28 and 98:F9:C7:7/28. Four of the five list a New Taipei City, Taiwan registry address; 00:0D:92 carries an older Yingko/Taipei County address on record, consistent with a single Taiwanese registrant holding multiple allocations over time rather than a one-off registration. The two MA-M bases, A0:19:B2 and 98:F9:C7, are themselves IEEE-held /24s shared by many unrelated registrants — ARIMA holds only the single /28 sub-block beneath each, not the whole base.

Beyond the registry entries, ARIMA Communications Corp. appears to be a substantive, identifiable operating company: it trades on the Taiwan Stock Exchange under ticker 8101 (TT), maintains an active corporate site (arimacomm.com.tw) describing OEM/ODM mobile phones, industrial tablets, networking devices, wireless/RF modules, and handheld GPS units, and traces a stated founding date of August 1, 1999 with a 2004 IPO.

This registrant is distinct from "Arima Computer Corp." (OUI 00:03:25), a separately-registered company that should not be conflated with it. IEEE publishes no registration/assignment dates for any of these five blocks, so none should be attributed here. A light search pass found no CVEs, advisories, or botnet reports naming ARIMA Communications devices specifically — an absence of evidence, not a confirmed clean record.

IEEE assignment

5 prefixes → ARIMA Communications Corp., New Taipei City, Taiwan [Confirmed] — the IEEE MA-L registry, the IEEE MA-M registry

Registry / block size

MA-L (3 assignments, 24-bit): 00:0D:92, 40:BA:61, 00:E6:66; MA-M (2 sub-allocations, 28-bit): A0:19:B2:7/28, 98:F9:C7:7/28 — the bases A0:19:B2 and 98:F9:C7 are IEEE Registration Authority-held /24s shared with many unrelated registrants; ARIMA's own claim is the single /28 beneath each

[Confirmed] — the IEEE MA-L registry, the IEEE MA-M registry

HQ / country

6F., No.866, Zhongzheng Rd., Zhonghe Dist., New Taipei City, TW 23586 (current registry address on 4 of 5 blocks; 00:0D:92 lists an older Yingko/Taipei County TW 23943 address) [Confirmed] — the IEEE MA-L registry

Company status

active; publicly traded on the Taiwan Stock Exchange, ticker 8101 (TT) [Likely] — https://www.bloomberg.com/quote/8101:TT

Device types

OEM/ODM mobile phones (consumer & industrial), industrial tablets, networking devices, wireless/RF communication modules, handheld GPS devices [Likely] — http://www.arimacomm.com.tw/en/

Notable products

no branded consumer product line identified; devices are contract-manufactured for other brands [Likely] — http://www.arimacomm.com.tw/en/about.php

Verified sample prefixes

00:0D:92, 40:BA:61, 00:E6:66 (MA-L); A0:19:B2:7/28, 98:F9:C7:7/28 (MA-M) [Confirmed] — the IEEE MA-L registry, the IEEE MA-M registry

Registration date

Unknown — IEEE's public OUI/MA-M data publishes no assignment/registration dates; do not attribute a third-party scrape date to IEEE [Confirmed absence] — the IEEE MA-L registry, the IEEE MA-M registry column set

Related vendors

Arima Computer Corp. (OUI 00:03:25) — a distinct registrant, not to be conflated with ARIMA Communications Corp. [Confirmed] — the IEEE MA-L registry

Security note

no CVEs, advisories, or botnet (e.g. Mirai/Mozi-family) reports specific to ARIMA Communications devices found in a light search pass (2026-07-31); absence of evidence, not a confirmed clean record [Unknown] — (no source found)

Analyst note

five separate OUI/MA-M assignments plus a publicly-traded, identifiable company profile place this registrant above the single-OUI-shell bar; treat matches as genuine ARIMA-manufactured hardware, most plausibly OEM/ODM wireless-comms gear, rather than a bare registry placeholder.