SIMCom Wireless Solutions — 7 prefixes (6 MA-L + 1 MA-M)

SIMCom Wireless Solutions is a Shanghai-based designer and manufacturer of cellular M2M and IoT wireless modules, founded in 2002 and now a wholly-owned subsidiary of Shenzhen-listed SUNSEA AIOT (002313.SZ). Rather than a single bare OUI registration, SIMCom holds a cluster of IEEE assignments accumulated as the legal entity and its name evolved: the cached IEEE registry shows six MA-L blocks and one MA-M block spread across the name variants "SIMCom Wireless Solutions Co.,Ltd.", "SIMCom Wireless Solutions Limited", "Shanghai SIMCOM Ltd.", "SHANGHAI SIMCOM LIMITED", and the older "SIM Technology Group Shanghai Simcom Ltd." — all registered to the SIM Technology Building at No. 633 Jinzhong Road in Shanghai's Changning District (the most recent block cites the SIMCom Headquarters Building at No. 289 Linhong Road). These OUIs surface on network interfaces of embedded cellular modules — 2G/3G/4G/5G, LTE-A, LPWA, GNSS and automotive/C-V2X parts such as the SIM7000X and SIM7672X series — used in smart metering, asset tracking, telematics, and industrial gateways, not on consumer end-user devices. Because the prefix identifies a module rather than a finished product, a SIMCom OUI on a network tells you an embedded cellular modem is present, which is useful for IoT asset classification. SIMCom-branded 5G modems were also named alongside Fibocom in the independently-disclosed "5Ghoul" 5G-baseband vulnerability set (10 CVEs, Dec 2023) — an implementation/baseband issue, not an OUI-layer one, but a genuine third-party research trail confirming real-world deployment.

IEEE assignment

7 prefixes → SIMCom / SIM Technology name variants, registered Shanghai, CN [Confirmed] — cached IEEE MA-L + MA-M (the IEEE MA-M registry) registry snapshots

Registry / block sizes

six MA-L (24-bit OUI) blocks plus one MA-M (28-bit) block [Confirmed] — cached IEEE the IEEE MA-L registry / the IEEE MA-M registry

Verified prefixes (MA-L)

48-E6-C0, 38-1C-4A, 98-CA-20, 30-95-E3, 5C-46-B0, 00-18-60; (MA-M): 64-FB-81-0 [Confirmed] — cached IEEE registry snapshots

Registered org-name variants

"SIMCom Wireless Solutions Co.,Ltd." (48-E6-C0, 38-1C-4A), "SIMCom Wireless Solutions Limited" (5C-46-B0), "Shanghai SIMCOM Ltd." (98-CA-20), "SHANGHAI SIMCOM LIMITED" (30-95-E3 and MA-M 64-FB-81-0), "SIM Technology Group Shanghai Simcom Ltd." (00-18-60) [Confirmed] — cached IEEE registry snapshots

HQ / country

SIM Technology Building, No. 633 Jinzhong Road, Changning District, Shanghai, CN (registry addresses; newest block cites SIMCom Headquarters Building, No. 289 Linhong Road, Shanghai) [Confirmed] — cached IEEE registry snapshots

Company status

active [Likely] — simcom.com company profile (vendor self-reported); corporate structure corroborated via Bloomberg profile (Shanghai Simcom Wireless Solutions Ltd) and GSA associate listing

Founded / parent

founded 2002; wholly-owned subsidiary of SUNSEA AIOT (Shenzhen 002313.SZ) [Likely] — simcom.com/about (vendor self-reported); Bloomberg / GSA corroboration

Device types

cellular M2M / IoT wireless modules (2G/3G/4G/5G, LTE-A, LPWA, GNSS, automotive/C-V2X) embedded in smart metering, asset tracking, telematics, industrial gateways [Likely] — en.simcom.com product/application pages

Notable products

SIM7000X (LPWA), SIM7672X series [Likely] — en.simcom.com product pages

Multiple-OUI note

7 distinct registry rows across two-plus legal-name variants is itself a substance signal (assignments accrued as the entity/name evolved), not a single bare registration [Confirmed] — cached IEEE registry snapshots

Registration dates

Unknown — IEEE publishes NO assignment/registration date for OUI/MA-L/MA-M blocks; third-party "date registered" values (e.g. maclookup.app: 2021-08-21, 2012-06-14) are database artifacts, not IEEE facts, and are deliberately not recorded here

[Confirmed] — IEEE registry format (Registry, Assignment, Organization Name, Organization Address only)

Security context

SIMCom 5G modems named in the "5Ghoul" 5G-baseband disclosure (14 vulns / 10 CVEs, disclosed 2023-12-07, alongside Fibocom); implementation/baseband layer, not OUI/MAC-layer [Likely] — asset-group.github.io/disclosures/5ghoul

Analyst note

A SIMCom OUI on a network indicates an embedded cellular module (M2M/IoT modem), not a finished consumer device; useful for IoT asset classification, but the module often sits inside a third party's product.