Shenzhen Kaifa Technology Co., Ltd. — 3 prefixes (MA-L)

A MAC address starting with 5C:85:F8, 70:44:1C, or 00:1C:55 belongs to Shenzhen Kaifa Technology Co., Ltd., a Chinese electronics manufacturer whose networking-relevant product line is smart utility metering — electricity, gas, and water meters with embedded communication modules.

Kaifa is a substantial, publicly traded company, not a shell registrant. Founded in 1985 and listed on the Shenzhen Stock Exchange since 1994 (ticker 000021.SZ), it reported roughly 25,000 employees as of September 2020 and about 23.3 billion CNY in 2018 revenue, with ten manufacturing and R&D sites across China, Malaysia, and the Philippines.

Beyond metering, Kaifa is a diversified electronics manufacturing services (EMS) provider — it holds over 10% global market share in hard-disk heads and also manufactures smartphone EMS components, DRAM modules, USB devices, and medical devices, though none of those product lines were tied to a specific MAC prefix in this pass.

The IEEE registers three MA-L (/24) blocks to Kaifa under two spellings of the registrant name, all sharing the same Shenzhen registered address; none of the three sits on a shared IEEE-RA base, so each prefix is exclusively Kaifa's. IEEE publishes no assignment date for any of them.

IEEE assignments

5C:85:F8, 70:44:1C, 00:1C:55 → Shenzhen Kaifa Technology Co., Ltd., registered Shenzhen, Guangdong, CN [Confirmed] — IEEE MA-L (the IEEE MA-L registry 5C85F8, the IEEE MA-L registry 70441C, the IEEE MA-L registry 001C55)

Registry / block size

MA-L (24-bit OUI) only; 3 assignments, no MA-M or MA-S entries [Confirmed] — the IEEE MA-L registry

Org name variants

"SHENZHEN KAIFA TECHNOLOGY CO.,LTD." (5C85F8, 70441C) vs "Shenzhen Kaifa Technology Co." (001C55) [Confirmed] — the IEEE MA-L registry

HQ / country

7006 Caitian Rd., Futian Dist., Shenzhen, Guangdong, CN 518035 [Confirmed] — IEEE MA-L

Registration dates

Unknown — IEEE the IEEE MA-L registry publishes no assignment-date field for any MAC prefix; none recorded [Confirmed absence] — the IEEE MA-L registry

Company status

active, publicly traded [Confirmed] — SZSE 000021.SZ; en.wikipedia.org/wiki/Shenzhen_Kaifa_Technology_Co.,_Ltd.

Company scale

founded 1985; ~25,000 employees (Sept 2020); ~23.3B CNY 2018 revenue; 10 R&D/manufacturing sites (China, Malaysia, Philippines) [Confirmed] — en.wikipedia.org/wiki/Shenzhen_Kaifa_Technology_Co.,_Ltd.

Device types

smart electricity/gas/water meters with GPRS WAN, Zigbee HAN, LoRaWAN, Sigfox, NB-IoT, M-Bus communication modules [Likely] — kaifametering.com

Notable products / models

MA120, MA329B electricity meters (CSA-IOT listing); KFM_001 meter (Norwegian AMS/HAN integration) [Likely] — csa-iot.org, github.com/roarfred/AmsToMqttBridge

Other business lines

hard-disk heads (>10% global market share), smartphone EMS, DRAM modules, USB devices, medical-device manufacturing [Confirmed] — en.wikipedia.org/wiki/Shenzhen_Kaifa_Technology_Co.,_Ltd.

Security context

Unknown — no CVEs, advisories, or vulnerability writeups located naming Kaifa hardware/firmware across two targeted searches [Unknown] — sourced null

Shared IEEE base check

none of the three prefixes sit on a shared/sub-allocated IEEE-RA base (unlike 70:B3:D5, 8C:1F:64); each is an ordinary single-registrant assignment exclusive to Kaifa [Confirmed] — the IEEE MA-L registry 5C85F8, the IEEE MA-L registry 70441C, the IEEE MA-L registry 001C55

Analyst note

A MAC on one of these three prefixes indicates genuine Kaifa-manufactured hardware, most plausibly IoT smart-metering equipment; Kaifa's broader EMS business (storage, mobile, medical) means the specific device type cannot be inferred from the OUI alone without other signals