3bumen.com — 1 prefix (MA-L)

A MAC address starting with 1C:7E:51 belongs to 3bumen.com, a Hong Kong-registered OUI holder whose live storefront sells networking and security electronics — so the prefix is most likely seen on small networking or CCTV hardware such as media converters, Wi-Fi adapters, or DVR/security gear sold or rebranded by the company.

3bumen.com holds a single IEEE MA-L block (1C:7E:51), registered to an address in Hong Kong per the IEEE registry. No second OUI assignment (MA-M or MA-S) was found for the vendor across the IEEE registry or third-party lookup sites, so the company appears to be a small, single-prefix registrant rather than a multi-block manufacturer.

The vendor's own site (3bumen.com/en/) is live and lists seven product categories aimed at a Latin America market: networking gear (gigabit media converters, mini USB Wi-Fi N300 adapters, rack cabinets), CCTV/security, audio/video connectivity, PCI network interface cards, networking accessories including fiber optic cable, solar energy equipment, and electric-mobility charging gear.

This catalog is consistent with 3bumen operating as a reseller/OEM-branding distributor of small networking hardware rather than a chipset manufacturer, though no page on the site names a specific device model that carries the 1C:7E:51 OUI. The footer copyright reads "2020 ©3bumen"; support is offered via phone and WhatsApp Business.

Third-party aggregator maclookup.app lists "20 August 2014" and "17 November 2015" as registration/last-updated dates for this prefix — these are database-scrape artifacts from the third-party tool, not IEEE-published facts, since IEEE's own OUI registry publishes no assignment dates. No CVE, security advisory, or malware association tied to "3bumen" products was found as of an August 2026 web search; this is an absence of findings, not a clean bill of health.

Vendor

3bumen.com [Confirmed] — the IEEE MA-L registry 1C7E51

OUI prefix

1C:7E:51 (MA-L, /24) [Confirmed] — the IEEE MA-L registry 1C7E51

Device class

networking and security hardware (media converters, Wi-Fi adapters, CCTV, PCI NICs), per the vendor's own product catalog [Likely] — https://www.3bumen.com/en/

Also seen on

solar energy equipment and electric-mobility charging gear listed in the same catalog [Likely] — https://www.3bumen.com/en/

OUI count

single MA-L assignment; no MA-M or MA-S found [Confirmed] — the IEEE MA-L registry 1C7E51

Company status

live operating storefront as of an August 2026 fetch [Likely] — https://www.3bumen.com/en/

IEEE assignment

1 prefix → 3bumen.com, registered Hong Kong, HK [Confirmed] — the IEEE MA-L registry 1C7E51 — IEEE MA-L

Registry / block size

MA-L (24-bit OUI); holds 1 IEEE prefix (1C:7E:51, ~16.8M addresses) [Confirmed] — the IEEE MA-L registry 1C7E51. No MA-M or MA-S assignments found. NOTE: IEEE's public OUI data publishes NO assignment/registration date (the IEEE MA-L registry columns are only Registry, Assignment, Organization Name, Organization Address); any "date registered" on third-party tools is a database artifact, not an IEEE fact.

HQ / country

11/F Front Blk Hang Lok Bldg, Hong Kong, HK (registry address; contains a "KONG KONG" repetition artifact, transcribed as recorded) [Confirmed] — the IEEE MA-L registry 1C7E51

Company status

live website with an active product catalog and support channels (phone, WhatsApp Business) as of an August 2026 fetch [Likely] — https://www.3bumen.com/en/

Device types

networking (media converters, Wi-Fi N300 adapters, rack cabinets), CCTV/security, audio/video connectivity, PCI NICs, fiber optic cable accessories, solar energy equipment, electric-mobility charging gear [Likely] — https://www.3bumen.com/en/

Notable products

none independently confirmed as carrying this OUI; the list above is the vendor's stated product line, not a confirmed device-to-prefix match [Unknown]

Verified sample prefixes

1C:7E:51 (MA-L, sole assignment) [Confirmed] — the IEEE MA-L registry 1C7E51

Special note

single-OUI registrant; only one MA-L block found across the IEEE registry and third-party aggregators checked (maclookup.app, cleancss.com, udger.com) [Likely] — https://maclookup.app/vendors/3bumen-com

Security context

no CVE, advisory, or malware association tied to "3bumen" found as of an August 2026 web search (absence of findings, not a clearance) [Unknown]

Related vendors

none found [Unknown]

Analyst note

1C:7E:51 is a normal single-organization MA-L assignment (not a shared IEEE base), so it can be attributed to 3bumen.com; but only one OUI block was found and no specific device model was independently confirmed to use this prefix, so treat the device-class mapping above as vendor-catalog context rather than a confirmed hardware identification.