Jiangsu Qinheng Co., Ltd. — 2 prefixes (MA-L)

A MAC address beginning with 38:3B:26 or 84:C2:E4 identifies hardware registered to Jiangsu Qinheng Co., Ltd., a Nanjing, Jiangsu-based IC design company in the same corporate family as the WCH chip brand, most often associated with USB-to-serial and USB-to-Ethernet interface adapters built around WCH-family chips.

IEEE's cached OUI registry lists exactly two MA-L /24 blocks under the exact registrant name "Jiangsu Qinheng Co., Ltd.": 38:3B:26 and 84:C2:E4, both at No. 18, Ningshuang Road, Nanjing, Jiangsu 210012, China. Two independent third-party OUI lookup databases (maclookup.app and hwaddress.com) corroborate both blocks and the same registered address, and both blocks are full, non-shared /24 allocations, so no shared-IEEE-base caveat applies to either prefix.

A closely related but legally distinct registrant, "Nanjing Qinheng Microelectronics Co., Ltd.", shares the same street address and holds roughly seventeen additional MA-L blocks (including DC:04:5A, 54:14:A7, 70:19:88) under a different corporate name; those blocks are not counted in this entry's prefix total. A further related registrant, "Nanjing Cocomm electronics co., LTD", occupies Room 201 of the same Qinheng technology park building and holds its own separate block, DC:9A:8E.

The WCH brand family (also written "QinHeng Electronics") is a real, findable IC design house founded in Nanjing in 2008, best known for the CH340/CH341 USB-to-serial chips and the CH9200 USB-to-Ethernet chip, the latter with a mainline Linux kernel driver. Whether hardware built specifically on the two Jiangsu Qinheng Co., Ltd. blocks (versus the sibling registrant's blocks) uses these exact chips is not independently confirmed, so device-type attribution here is inferential rather than direct.

No CVE for Qinheng/WCH chip hardware is recorded in the NVD as of an August 2026 search, and no malware or trojan association for this vendor turned up in the same search. This is an ordinary, widely-deployed commodity interface-chip vendor with no notable security incidents surfaced.

IEEE assignment

2 prefixes → Jiangsu Qinheng Co., Ltd., registered Nanjing, Jiangsu, CN [Confirmed] — the IEEE MA-L registry 383B26, the IEEE MA-L registry 84C2E4

Registry / block size

MA-L (24-bit OUI); exactly 2 IEEE MA-L blocks under this exact registrant string [Confirmed] — the IEEE MA-L registry 383B26, the IEEE MA-L registry 84C2E4

HQ / country

No. 18, Ningshuang Road, Nanjing, Jiangsu 210012, China [Confirmed] — the IEEE MA-L registry 383B26

Company status

active [Likely] — https://www.wch-ic.com/ (live WCH/QinHeng product catalog; corporate-status confirmation is for the brand family, not independently verified for this specific legal entity)

Brand family

WCH, also written "QinHeng Electronics"; IC design house founded 2008, Nanjing [Confirmed] — https://maclookup.app/vendors/jiangsu-qinheng-co-ltd, https://hwaddress.com/company/jiangsu-qinheng-co-ltd/, https://www.wch-ic.com/

Device types

USB-to-serial adapters, USB-to-Ethernet adapters (brand-family product line; not independently confirmed for these two specific blocks) [Likely] — https://www.wch-ic.com/products/CH340.html, https://github.com/torvalds/linux/blob/master/drivers/net/usb/ch9200.c

Notable products (brand family, not confirmed per-block)

CH340, CH341 (USB-to-serial), CH9200 (USB-to-Ethernet, mainline Linux driver) [Likely] — https://www.wch-ic.com/products/CH340.html, https://cateee.net/lkddb/web-lkddb/USB_NET_CH9200.html

Verified prefixes (both MA-L, Jiangsu Qinheng Co., Ltd., full unshared /24s)

38:3B:26, 84:C2:E4 [Confirmed] — the IEEE MA-L registry 383B26, the IEEE MA-L registry 84C2E4

Registry coverage

no MA-M (28-bit) or MA-S (36-bit) blocks found for any Qinheng-family registrant [Confirmed] — the IEEE MA-M registry, the IEEE MA-S registry

Related entities (same address / technology park, separate registrant names, NOT counted in this entry's prefix total)

Nanjing Qinheng Microelectronics Co., Ltd. (~17 MA-L blocks incl. the IEEE MA-L registry DC045A, 5414A7, E04E7A, 0C3D5E, 9C7F64, 701988, C817F5, 546C50, D00C5E, 50F8AD, F40393, 50547B, 5C5310, 3CAB72, DC3262, E466E5); Nanjing Cocomm electronics co., LTD (the IEEE MA-L registry DC9A8E)

[Confirmed] — the IEEE MA-L registry

IEEE date note

IEEE's public OUI data (the IEEE MA-L registry: Registry, Assignment, Organization Name, Organization Address) publishes no assignment/registration date. maclookup.app lists third-party "registration dates" (2013-01-09 for 84:C2:E4, 2019-02-27 for 38:3B:26) that are database artifacts, not IEEE facts, and are not reproduced as IEEE dates here.

[Confirmed] — https://maclookup.app/vendors/jiangsu-qinheng-co-ltd

Security history

no CVE recorded in the NVD, and no malware or trojan association found for this vendor, as of an August 2026 search [Likely] — general NVD/web search, no single citable source URL