ACA-Digital Corporation — OUI 00:1A:55 (MA-L)

ACA-Digital Corporation holds a single IEEE MA-L block, OUI 00:1A:55, registered to a Taiwan address (17F, No. 866-7, Chung Cheng Rd., Chung Ho City, Taipei County). Behind that one registration is a real, identifiable manufacturer rather than a bare shell: ACA-Digital was a Taiwan-based ruggedized mobile-computing company, founded around 2005 in Zhonghe (Chung Ho) City in the greater Taipei area. Its product line covered rugged tablet PCs, handheld terminals, pen tablets, RFID readers, and mini-PCI wireless modules aimed at military, law-enforcement, manufacturing, and transportation deployments — hardware that plausibly carries Ethernet or Wi-Fi interfaces and therefore needs a globally-administered MAC prefix. The company was acquired outright by Advantech, the Taiwanese industrial-computing firm, in November 2010 for a reported NTD$93 million in cash, with 2010 revenue estimated near NTD$100 million and customers across Europe, the US, Japan, Taiwan, and China. The device context is independently corroborated: FCC grantee code UVZ ("ACA Digital Corporation," Zhonghe City, Taiwan) lists eight equipment-authorization filings from 2007–2009 — the XT1100 Rugged Tablet PC, CT1100 Pen Tablet, HT1100 Handy Terminal, an HF RFID reader, a mini-PCI module, and 3.7-inch rugged PDAs — matching the mobile-computing business described in the acquisition coverage. IEEE publishes no assignment date for this or any OUI, so no registration date is recorded; any third-party "date registered" would be a database artifact, not an IEEE fact.

IEEE assignment

OUI 00:1A:55 → ACA-Digital Corporation [Confirmed] — IEEE MA-L

Registry / block size

MA-L (24-bit OUI) [Confirmed] — the IEEE MA-L registry

Registered org name

ACA-Digital Corporation [Confirmed] — the IEEE MA-L registry

Registered address

17F, No. 866-7, Chung Cheng Rd., Chung Ho City, Taipei County, TW 23586 [Confirmed] — the IEEE MA-L registry

Country

Taiwan (TW) [Confirmed] — the IEEE MA-L registry

Company status

acquired — 100% acquired by Advantech in November 2010 for a reported NTD$93 million cash; operated as a ruggedized mobile-computing manufacturer founded ~2005 [Confirmed] — https://www.automation.com/en-us/articles/2010-2/advantech-acquires-aca-digital-taiwan, https://www.fiercesensors.com/components/advantech-acquires-aca-digital-taiwan

Device types

rugged tablet PCs, pen tablets, handheld terminals / PDAs, RFID readers, mini-PCI wireless modules [Confirmed] — FCC grantee UVZ: https://fccid.io/UVZ, https://fcc.report/company/Aca-Digital-Corp

Notable products / FCC filings

XT1100 Rugged Tablet PC, CT1100 Pen Tablet, HT1100 Handy Terminal, HF RFID Reader, Mini PCI Module, 3.7" Rugged PDA (2007–2009) [Confirmed] — https://fccid.io/UVZ, https://fcc.report/company/Aca-Digital-Corp

Industry / market

ruggedized mobile computing for military, law-enforcement, manufacturing, transportation [Confirmed] — https://www.automation.com/en-us/articles/2010-2/advantech-acquires-aca-digital-taiwan

Registration date

Unknown — IEEE publishes no per-OUI assignment date; none found in any source checked, left blank rather than invented [Confirmed] — IEEE public OUI data has no date column

Multiple-OUI check

single OUI only — no additional MA-L/MA-M/MA-S blocks found for this org name in the cached registries [Confirmed] — the IEEE MA-L registry, the Wireshark manufacturer database, the IEEE MA-M registry, the IEEE MA-S registry

OUI→org mapping

local IEEE-derived registry mirror agrees with third-party aggregator udger.com on the org name for 00:1A:55 [Likely] — https://udger.com/resources/mac-address-vendor-detail?name=aca-digital_corporation

Analyst note

an 00:1A:55 globally-administered address identifies genuine ACA-Digital hardware (now an Advantech legacy line); post-2010 devices may ship under Advantech branding while retaining this OUI on older stock.