Chongqing Zhouhai Intelligent Technology Co., Ltd — 2 prefixes (MA-L)

A MAC address starting with 04:DA:28 or E8:E6:09 belongs to Chongqing Zhouhai Intelligent Technology Co., Ltd, an ODM/JDM manufacturer of smart wearables — smartwatches, health/fitness bands, and smart rings — that ships largely under other companies' retail brands. Both IEEE MA-L records name the same registrant (one entry has extra internal whitespace: "Chongqing Zhouhai intelligent technology CO., Ltd") and both give a Shenzhen registrant address.

The company's own site describes a "dual-base layout" spanning Chongqing and Shenzhen, which reconciles the "Chongqing" brand name with the Shenzhen addresses on both OUI records. FCC grantee code 2A3HK, the operating site zhouhaismart.com, and independent import-shipment records for smartwatch models it manufactures corroborate the device type and confirm this is an active, identifiable company rather than a bare registration.

The company is publicly listed on China's NEEQ ("New Third Board") under stock code 874458, with a listing application dated March 2024 — a level of disclosure well beyond a bare OUI holder. Import-shipment records name Nexxbase Marketing Private Limited (India) as a customer receiving COLORFIT- and E12-series smartwatch models; COLORFIT is a product line of the Indian wearables brand Noise, which Nexxbase operates.

No CVE, NVD entry, or public security advisory naming this vendor, "Zhouhai," or its known product lines (E05, ULTRA2, COLORFIT-series ODM builds) was found as of an August 2026 search — a sourced absence, not a clean-record guarantee. Two similarly named OUI holders, "Zhouhai Intelligence(Shenzhen).,Ltd" (18:12:0C) and "Shenzhen zhouhai technology co.,LTD" (8C:CE:FD), are separate registrants and are not attributed to this entry.

IEEE assignment

2 prefixes → "Chongqing Zhouhai Intelligent Technology Co., Ltd" / "Chongqing Zhouhai intelligent technology CO., Ltd" (same organization, inconsistent internal whitespace in the registry), both MA-L [Confirmed] — the IEEE MA-L registry 04DA28, the IEEE MA-L registry E8E609

Registry / block size

MA-L (24-bit OUI) x2; no MA-M or MA-S sub-allocations found for "zhouhai" under any spelling [Confirmed absence] — the IEEE MA-M registry, the IEEE MA-S registry

HQ / country

registrant address on both prefixes is Shenzhen, Guangdong, CN (04:DA:28: Baoan District, Shenzhen, 518110; E8:E6:09: Guangming District, Shenzhen, 518107) [Confirmed] — the IEEE MA-L registry 04DA28, the IEEE MA-L registry E8E609. Company's own site additionally names Chongqing as a co-headquarters/dual-base location

[Confirmed — company claim] — https://www.zhouhaismart.com/E/about.html

Company status

active (Likely) — operating website, current FCC filings, and a NEEQ listing application dated March 12, 2024 [Likely] — https://www.zhouhaismart.com, https://fccid.io/2A3HK, https://www.ichongqing.info/2024/09/11/chongqing-adds-72nd-company-to-new-third-board/

Device types

smartwatches (GPS, Bluetooth calling, ECG), health/fitness bands, smart rings, ODM/JDM hardware+software delivery [Confirmed] — https://www.zhouhaismart.com

Notable products (FCC grantee code 2A3HK)

E05 smartwatch, ULTRA2 smartwatch [Confirmed] — https://fccid.io/2A3HK, https://fccid.io/2A3HK-ULTRA2, https://fccid.io/2A3HK-E05/User-Manual/15-E05-UserMan-US-5519978

ODM customer corroboration

COLORFIT- and E12-series smartwatch models shipped to Nexxbase Marketing Private Limited, India (Nexxbase operates the Noise wearables brand; COLORFIT is a Noise product line) [Confirmed shipment data; Likely brand attribution] — https://www.importgenius.com/india/suppliers/chongqing-zhouhai-intelligent-technology-co-ltd

Registration dates

Unknown as an IEEE fact — IEEE's public OUI data (the IEEE MA-L registry: Registry, Assignment, Organization Name, Organization Address) publishes no assignment/registration date for either prefix. maclookup.app shows "registered on" 30 Dec 2022 (04:DA:28) and 27 Aug 2024 (E8:E6:09); these are third-party database artifacts, not IEEE facts [Confirmed as artifact, Unknown as IEEE fact] — https://maclookup.app/macaddress/04da28, https://maclookup.app/macaddress/e8e609

Security context

no CVE, NVD entry, or public advisory found for this vendor or its named models (E05, ULTRA2) as of an August 2026 search [Confirmed — sourced absence, not a clean-record guarantee] — https://nvd.nist.gov

Related / similarly-named (NOT this vendor)

18:12:0C → "Zhouhai Intelligence(Shenzhen).,Ltd"; 8C:CE:FD → "Shenzhen zhouhai technology co.,LTD" — separate IEEE registrants [Confirmed as separate registry rows; corporate relationship Unknown] — the IEEE MA-L registry 18120C, the IEEE MA-L registry 8CCEFD

Analyst note

two MA-L blocks plus corroborating FCC filings, ODM shipment records, and a NEEQ stock listing (874458) place this vendor above a bare single-OUI shell; the "Chongqing" company name and Shenzhen registry address are two separate, compatible facts (the company states a dual-base layout), not a conflict.