Chipsea holds a surprisingly large 20 MA-L blocks — contradicting an expected near-negative — registered as "Chipsea Technologies (Shenzhen) Corp." at 9F, Block A, Garden City Digital Building, No. 1079 Nanhai Road, Nanshan District, Shenzhen, China. Verified samples include 08:B8:D0, 0C:95:41, 5C:CA:D3, 88:22:B2, C8:B2:1E, D0:3E:7D, E8:CB:ED, and F8:8F:C8. These OUIs appear on MCUs, sensor SoCs (pressure/touch/health), IoT and health-measurement chips (body-fat scales, blood-pressure monitors), and some Bluetooth/connectivity parts. Chipsea was founded in September 2003 (formerly Shenzhen Xinhai Technology, renamed November 2015) and listed on the Shanghai STAR Market (ticker 688595) on 2020-09-28 at RMB 22.82/share, raising about RMB 570.5 million. The key analyst point is the chipset pattern at scale: these 20 prefixes identify Chipsea-silicon devices — often health/IoT measurement gear — regardless of the brand on the box. For triage, a Chipsea OUI signals a device built on Chipsea silicon, frequently a health/measurement or IoT device, not a specific consumer brand; the 20-block footprint means these can appear in volume.
- IEEE assignment
- 20 prefixes → "Chipsea Technologies (Shenzhen) Corp.", Shenzhen, China [Confirmed] — IEEE MA-L
- Registry / block size
- MA-L; 20 blocks (a large allocation) [Confirmed] — maclookup.app (IEEE-sourced)
- HQ / country
- 9F, Block A, Garden City Digital Building, No. 1079 Nanhai Road, Nanshan District, Shenzhen, Guangdong 518000, China [Confirmed] — maclookup.app
- Company status
- active; founded September 2003 (formerly Shenzhen Xinhai Technology, renamed November 2015); STAR Market (688595) IPO 2020-09-28 at RMB 22.82/share (~RMB 570.5M raised) [Confirmed] — China Knowledge
- Device types
- MCUs, sensor SoCs (pressure/touch/health), IoT/health-measurement chips (body-fat scales, blood-pressure monitors), some Bluetooth/connectivity [Confirmed] — chipsea.com
- Notable products
- MCUs, health/measurement sensor SoCs, IoT chips
- Verified prefix sample
- 08:B8:D0, 0C:95:41, 5C:CA:D3, 88:22:B2, C8:B2:1E, D0:3E:7D, E8:CB:ED, F8:8F:C8 [Confirmed] — maclookup.app
- Special note
- Unexpectedly large footprint (20 MA-L blocks — NOT a near-negative). Chipset-OUI flag — these prefixes identify Chipsea-silicon devices (often health/IoT measurement gear) regardless of brand. The IEEE registry publishes no assignment dates, so none is stated here. [Confirmed]
- Related vendors
- peer fabless IoT-silicon makers
- Analyst note
- A Chipsea OUI signals a device built on Chipsea silicon — frequently a health/measurement or IoT device — not a specific consumer brand. The 20-block footprint means these can appear in volume.