CK Telecom (Shenzhen) Limited — 2 prefixes (MA-L)

A MAC address beginning with DC:E8:38 or E0:C0:D1 belongs to CK Telecom (Shenzhen) Limited, a Shenzhen, Guangdong-based OEM/ODM manufacturer of wireless communication products — chiefly mobile phones — for domestic and overseas brand customers. Devices carrying these prefixes are most plausibly consumer handsets built to a third-party brand's specification rather than sold under CK Telecom's own name, typical of the OEM/ODM model.

CK Telecom (Shenzhen) Limited is registered at Floor 9th, Building 4C, Software Industry Base, Xuefu Road, Hi-Tech Park, Nanshan Dist., Shenzhen, Guangdong, CN 518057 — the identical address IEEE lists for both of its confirmed MA-L blocks. Holding two independent OUI assignments under one name and address is itself a signal of a real manufacturing registrant rather than a shell.

Third-party business directories (Dun & Bradstreet, Bloomberg, Panjiva) independently list a company at this same name and address as an active wireless-communications manufacturer/exporter. A storefront on made-in-china.com under the "Shenzhen CK Telecom" name, active on that marketplace since 2009, sells mobile phones — consistent with an OEM/ODM business "engaged in R&D, manufacturing, marketing and sales of wireless communication products."

The "CK Telecom" brand name is shared by several distinctly-registered Chinese entities that must not be conflated with this one. IEEE separately lists "CK Telecom Ltd" (no "(Shenzhen) Limited" suffix) at a different address in Heyuan, Guangdong under its own MA-L block, B8:64:91 — a related but legally distinct registration, excluded from this entry's prefix list.

FCC equipment-authorization filings (grantee code WIQ) show a "Guangzhou CK Telecom Limited" that certified GSM feature phones (models including CAT07 and BILLY) between 2008 and 2010, and a related filing accompanies a Doro AB (Sweden) senior-feature-phone model (DORO338G) — consistent with CK Telecom acting as an ODM behind carrier/brand-labeled handsets. A LinkedIn listing for "CK-Telecom" separately gives a Chengdu, Sichuan address with the same OEM/ODM description.

None of these related listings can be confirmed as the identical legal entity behind the Shenzhen-registered DC:E8:38 / E0:C0:D1 blocks. They read as a multi-city group of affiliated "CK Telecom"-branded entities, a common structure among Chinese electronics OEMs, but the overlap is circumstantial, not confirmed by a shared registry ID.

IEEE's public OUI registry does not publish assignment or registration dates, so no registration date can be attributed to either block from IEEE itself. Third-party aggregator maclookup.app shows database entries reading "2015-12-03" for DC:E8:38 and "2016-11-29" for E0:C0:D1 — that aggregator's own timestamps, not IEEE facts, and not represented here as registration dates.

No CVE, security advisory, or malware/abuse association naming CK Telecom or its products was found in an August 2026 search of the NVD and general web search.

IEEE assignment

2 prefixes (DC:E8:38, E0:C0:D1) → CK Telecom (Shenzhen) Limited, registered Shenzhen, Guangdong, CN [Confirmed] — the IEEE MA-L registry DCE838, the IEEE MA-L registry E0C0D1

Registry / block size

MA-L (24-bit OUI) for both assignments; no MA-M (the IEEE MA-M registry) or MA-S (the IEEE MA-S registry) blocks found registered under "CK Telecom" [Confirmed] — the IEEE MA-L registry, the IEEE MA-M registry, the IEEE MA-S registry searches

HQ / country

Floor 9th, Building 4C, Software Industry Base, Xuefu Road, Hi-Tech Park, Nanshan Dist., Shenzhen, Guangdong, CN 518057 [Confirmed] — the IEEE MA-L registry

Company status

no closure/dissolution signal found; multiple independent directory listings describe it as an operating manufacturer, though freshest concrete evidence (a sample shipment record) dates to 2016 [Likely] — https://www.dnb.com/business-directory/company-profiles.shenzhen_ck_telecom_limited.003c823ebb8bcbb607c7eeef70db7974.html, https://www.bloomberg.com/profile/company/0174440D:CH, https://panjiva.com/Ck-Telecom-Ltd/39136652

Employee/revenue signal

a search-indexed D&B listing associates a "Shenzhen CK Telecom Limited" at this address with roughly 260 employees and ~US$53.55M in sales; the D&B page itself carries no independently readable content confirming the figures beyond the search snippet [Unverified — search-snippet only] — https://www.dnb.com/business-directory/company-profiles.shenzhen_ck_telecom_limited.003c823ebb8bcbb607c7eeef70db7974.html

Device types

mobile/feature phones (primary, FCC-corroborated via related entity); company self-description also claims tablets, wearable products, and other wireless products [Likely] — https://fccid.io/WIQ, made-in-china.com storefront listing

Notable products

GSM feature-phone models certified under FCC grantee WIQ (BILLY, CAT07, DORO326/328G) attributed to a related "Guangzhou CK Telecom Limited"; a Doro AB DORO338G FCC filing separately names a CK Telecom party [Likely] — https://fccid.io/WIQ, https://fcc.report/FCC-ID/WS5DORO338G/1229317.pdf

Related-but-distinct OUI

CK Telecom Ltd (Heyuan, Guangdong, CN 517000) holds its own separate MA-L block, B8:64:91 — different registrant name and address from CK Telecom (Shenzhen) Limited, so NOT included in this entry's prefixes [Confirmed — distinct registration] — the IEEE MA-L registry B86491

Registration date

Unknown from IEEE — IEEE's public OUI data (the IEEE MA-L registry) publishes no assignment/registration date. Third-party aggregator maclookup.app shows its own database entries reading "2015-12-03" (DC:E8:38) and "2016-11-29" (E0:C0:D1); these are that database's artifacts, not IEEE facts, and are not asserted here as registration dates [Confirmed — negative on IEEE; the third-party figures are reported, not endorsed] — https://maclookup.app/vendors/ck-telecom-shenzhen-limited

Security note

no CVE, advisory, or malware/abuse association naming CK Telecom or its products is recorded in the NVD or found via general web search as of an August 2026 search [Confirmed negative, dated] — https://nvd.nist.gov/search

Per-prefix product mapping

Unknown which specific product line uses which of the two OUI blocks; identification is vendor-level only [Unknown] — no per-OUI product mapping found in any source

Related vendors

CK Telecom Ltd (Heyuan) — separate OUI registration, same brand name [Confirmed]; Guangzhou CK Telecom Limited (FCC WIQ) and a Chengdu/Sichuan-listed "CK-Telecom" (LinkedIn) — same brand family, unconfirmed shared legal identity with the Shenzhen registrant [Likely]

Analyst note

two independent MA-L blocks under an identical registrant name and address, corroborated by multiple independent third-party business-directory listings (D&B, Bloomberg, Panjiva) and a marketplace storefront describing the same address as an operating mobile-phone OEM/ODM manufacturer, place this above a bare single-OUI shell registration — though the evidence is directory/self-description-level rather than a named, verifiable flagship product line, and none of the several other "CK Telecom"-branded entities found (Heyuan, Guangzhou/FCC, Chengdu/LinkedIn) can be confirmed as the same legal entity as this Shenzhen registrant.