MAC address vendor

Chi Mei Communication Systems, Inc. — 2 prefixes (MA-L)

Primary prefix
CC:F3:A5
Block
MA-L
Status
Acquired

Summary

// what this is
Chi Mei Communication Systems is registered to MAC prefix CC:F3:A5 and 1 more in the IEEE OUI database. When a device's MAC address begins with CC:F3:A5, that block was registered by Chi Mei Communication Systems — the OUI identifies the maker of the network hardware, which is not always the brand on the device. Chi Mei Communication Systems was acquired; the registration remains on record with IEEE.
// analyst note
Two independent MA-L assignments plus multi-source company history and FCC device-filing corroboration support treating this as a substantive consolidated vendor entry, not a thin single-OUI page.
[ 01 ] — Context

About this vendor.

Updated  ·  Confidence: Medium-High

Chi Mei Communication Systems, Inc. (CMCS) holds two IEEE MA-L OUI blocks — CC:F3:A5 and 00:11:94 — registered under slightly different addresses in Taipei/Tucheng, Taiwan, a normal pattern for a company that moved offices or re-registered between allocation cycles. CMCS was founded in 2001 as a mobile-handset original design manufacturer (ODM), designing and building GSM/GPRS/EDGE-era phones for other brands. In May 2005 it was acquired by FIH Mobile, the handset-ODM arm of Foxconn, becoming a foundational piece of Foxconn's phone-manufacturing capability. FCC equipment-authorization filings under grantee code QDJ, spanning 2002–2012, show the device mix consistent with that role: GSM/tri-band phones, early "Smart Phone" models, Tablet PCs, GSM Compact Flash cards for PDAs and laptops, 3G data modules, and wireless remote-monitoring terminals. CMCS also holds at least one US design patent for a mobile phone, and a 2009 Engadget report named it as the contract assembler for the original Palm Pre — a claim from a single contemporary outlet, not independently cross-verified here. Together, the two-OUI footprint, the identifiable corporate history, and the device/product record clear the bar for a substantive vendor entry rather than a bare single-OUI shell.

IEEE assignments
CC:F3:A5 → "Chi Mei Communication Systems, Inc" (No.4 Tucheng City, Taipei County, TW 23678); 00:11:94 → "Chi Mei Communication Systems, Inc." (11F, No.39, Chung Hua RD. Sec 1, Taipei, TW 100) [Confirmed] — the IEEE MA-L registry (cached IEEE MA-L registry), lines 4107 and 13155
Registry / block size
MA-L (24-bit OUI) × 2 blocks; no IEEE-published assignment date for either (the IEEE MA-L registry schema is Registry, Assignment, Organization Name, Organization Address only) [Confirmed] — the IEEE MA-L registry
Third-party date caveat
maclookup.app shows a "date registered" (03 Oct 2016) / "last updated" (11 Dec 2025) for this vendor's prefixes — a third-party database artifact, not an IEEE fact, and not recorded as a registration date here [Confirmed schema check / Unknown provenance for the third-party date] — https://maclookup.app/
Company profile
founded 2001, Taipei/Tucheng, Taiwan; mobile-handset ODM (GSM/GPRS/EDGE phone design and manufacture) [Confirmed — 3 independent sources] — https://pitchbook.com/profiles/company/160028-56, https://www.fihmobile.com/en/about/milestones, https://matrixbcg.com/blogs/brief-history/fihmb
Corporate status
acquired by FIH Mobile (Foxconn's mobile subsidiary) on May 13, 2005 [Confirmed] — https://www.fihmobile.com/en/about/milestones, https://matrixbcg.com/blogs/brief-history/fihmb
Device types
GSM/tri-band mobile phones, early "Smart Phone" models, Tablet PCs, GSM Compact Flash cards for PDAs/laptops, 3G data modules, wireless remote-monitoring terminals (FCC ID grantee code QDJ, filings 2002–2012) [Confirmed] — https://fccid.io/QDJ
Notable product association
reported contract assembler for the original Palm Pre (2009) [Likely — single contemporary press source, not independently cross-verified] — https://www.engadget.com/2009-03-18-palm-pre-to-be-assembled-by-chi-mei-communication-systems-fairi.html
Patent record
US design patent D653641 ("Mobile phone") assigned to Chi Mei Communication Systems, Inc. [Confirmed] — https://www.freepatentsonline.com/D653641.html
Substance verdict
two independent OUI assignments + identifiable company history + product/device corroboration — not a bare single-OUI registration [Confirmed]
Master/pipeline status at research time
no existing row in this site's own enrichment records and no prior .md/.CHECK.md for this slug — fresh lookup, not a re-verification [Confirmed] — this site's own enrichment records, this site's own enrichment records
Related vendors
FIH Mobile / Foxconn (parent since 2005) [Confirmed] — https://www.fihmobile.com/en/about/milestones
[ 02 ] — OUI prefixes

Assignments by IEEE.

2
// registered prefixes2
  1. CC:F3:A5MA-L
  2. 00:11:94MA-L
[ 03 ] — Related

Keep digging.