China Mobile IoT Company Limited — 30 prefixes (MA-L)

China Mobile IoT Company Limited is a wholly-owned subsidiary of the China Mobile Communications Group, and it holds roughly 30 MA-L OUI blocks in the cached IEEE registry — all registered to the same Chongqing-based entity. Unlike a consumer-device brand, this organization positions itself as a chip, module, and platform provider for IoT connectivity, describing its role as the supporter of IoT business services and the provider of IoT chips and modules. The prefixes therefore surface across infrastructure and industrial hardware rather than retail products: NB-IoT and eSIM modules (such as the M5310), Internet-of-Vehicles units, smart metering for water and gas, smart parking, street-lighting controllers, fire-control systems, and agricultural sensors. Consolidating these blocks into one vendor entry is more useful than minting near-identical per-prefix pages, since they all trace to one legal entity. Two registry addresses appear across the assignments — most blocks carry NO.8 Yu Ma Road, NanAn Area, Chongqing (401336), while a subset of newer blocks use No. 8 Yangliu North Road, Yubei District, Chongqing (401120/401121) — both in Chongqing, China. A critical caveat for any registration-date work: IEEE publishes no assignment or registration dates for MA-L blocks, and the per-prefix "registration dates" shown by third-party tools (maclookup.app, Netify) are database artifacts, not IEEE facts, so none are recorded here. Finally, note the systemic security context: as a China Mobile subsidiary this vendor operates under China's National Intelligence Law, and devices embedding its modules appear in persistent infrastructure roles (metering, parking, vehicles) where remote-update channels create supply-chain exposure — though no CVEs specific to this vendor were found in this research pass.

IEEE assignment

~30 MA-L prefixes → China Mobile IoT Company Limited, registered Chongqing, CN [Confirmed] — IEEE oui.csv (enrichment/registries/oui.csv). Org name appears in two forms across blocks: "China Mobile IOT Company Limited" (majority) and the variant "China Mobile Iot Limited company" — same legal entity.

Registry / block size

MA-L (24-bit OUI, /24 block of 16,777,216 addresses per assignment); all 30 assignments are MA-L. No MA-M or MA-S entries found in mam.csv or oui36.csv. [Confirmed] — IEEE oui.csv. NOTE: IEEE's public OUI data publishes NO assignment/registration date; any "date registered" on third-party tools is a database artifact, not an IEEE fact.

HQ / country

Two registry addresses, both Chongqing, CN — (1) NO.8 Yu Ma Road, NanAn Area, Chongqing 401336 (most blocks); (2) No. 8 Yangliu North Road, Yubei District, Chongqing 401120/401121 (subset of newer blocks). Country CN. [Confirmed] — IEEE oui.csv

Company status

active; wholly-owned subsidiary of China Mobile Communications Group [Confirmed] — linkedin.com/company/china-mobile-iot-company-limited

Org type

chip / module / platform provider for IoT connectivity (not a consumer-device brand) [Confirmed] — linkedin.com/company/china-mobile-iot-company-limited

Device types

IoT chips and modules (NB-IoT, eSIM modules such as the M5310); Internet-of-Vehicles (IoV) hardware; smart home devices; wearables; smart metering (water/gas); smart parking; street-lighting controllers; fire-control systems; smart-agriculture sensors. Modules are embedded in infrastructure/industrial applications rather than sold direct to consumers. [Confirmed] — linkedin.com/company/china-mobile-iot-company-limited, 4gltemall.com (CMCC M5310 eSIM NB-IoT module)

Prefix count

registry cache shows 30 MA-L blocks; third-party trackers report a lower figure (maclookup.app/Netify ~24 MA-L). Counts are current third-party snapshots and drift; the 30-block figure is the first-party registry-cache count. [Confirmed registry count; third-party counts differ] — enrichment/registries/oui.csv; maclookup.app/vendors/china-mobile-iot-company-limited; netify.ai

Verified sample prefixes (all MA-L)

2C:33:41, 84:27:B6, 50:55:8D, 1C:25:E1, B4:E4:6B, 64:F8:8A, FC:F2:9F, E0:C5:8F [Confirmed] — IEEE oui.csv

Registration-date note

third-party databases (maclookup.app, Netify) show per-prefix "registration dates" roughly 2016-05-23 (earliest, prefix 1C:25:E1) to 2022-07-20 (latest, prefix B4:E4:6B). These are third-party scrapes of the IEEE public listing — the IEEE Registration Authority publishes NO official registration timestamps for individual MA-L assignments — and must never be presented as IEEE-issued facts. [Confirmed that these are third-party artifacts] — maclookup.app, standards.ieee.org/products-programs/regauth/mac

Security / analyst note

elevated geopolitical-risk category. As a China Mobile subsidiary the vendor operates under China's National Intelligence Law, which can compel cooperation with state intelligence. Forescout (2025) documented 40%+ year-over-year growth of Chinese-manufactured IoT devices in US networks (2023–2024); the FDD (April 2026) flagged Chinese cellular-module makers for surveillance, device-disruption, and OTA-malware risk (China Mobile IoT is part of the broader China Mobile ecosystem flagged, not named as a module maker in that report). Devices embedding these modules sit in persistent infrastructure roles (metering, parking, buildings, vehicles) where remote-update capability creates supply-chain exposure. No CVEs specific to this vendor's products were found in this pass. [Confirmed systemic context; no product-specific CVEs found] — forescout.com, fdd.org, industrialcyber.co

Website

no dedicated public vendor site found for China Mobile IoT Company Limited specifically; parent is china-mobile.com (China Mobile Group). LinkedIn profile confirmed. A GSMA IoT rollout profile exists but returned 403 during this pass. [Likely] — linkedin.com/company/china-mobile-iot-company-limited

IANA Reference

not applicable — OUI/MAC vendor entry has no IANA RFC reference; column stays blank. [Confirmed]