Chant Sincere Co., Ltd.
Summary
- // what this is
- Chant Sincere is registered to MAC prefix
B816DBand 1 more in the IEEE OUI database. When a device's MAC address begins withB816DB, that block was registered by Chant Sincere — the OUI identifies the maker of the network hardware, which is not always the brand on the device. - // analyst note
- Two independent IEEE OUI assignments under the same registrant name, combined with an active public corporate profile (Taipei Exchange: 6205, founded 1985), place this entry above the single-OUI shell threshold. The specific product carrying the MAC address space is Unknown; the company's public product lines are passive connectors and cable assemblies rather than networking silicon.
About this vendor.
A MAC address starting B8:16:DB or 00:17:9B belongs to Chant Sincere Co., Ltd., a Taiwan-based manufacturer of connectors and cable assemblies, and is most plausibly seen on OEM networking cable products such as RJ45 jack modules or smart-cable assemblies with embedded identification chips rather than on a standalone branded network device.
Chant Sincere holds two separate IEEE MA-L (/24) assignments — B816DB and 00179B — both registered to the same company at addresses in New Taipei City, Taiwan. Two independent OUI blocks under one registrant, rather than a single bare registration, is itself evidence of an operating company rather than a shell filing.
The company is publicly traded on the Taipei Exchange (ticker 6205), founded in 1985, and maintains an active corporate website describing product lines in RJ45, USB-C, HDMI, DisplayPort, FAKRA, D-Sub, M8/M12, and SFP/QSFP connectors sold into computing, industrial, telecom, automotive, and consumer-electronics OEMs.
No public source ties a specific shipped device to either OUI block, so the exact hardware carrying these MAC addresses stays Unknown. No CVE, malware, or botnet association was found for the company or its prefixes as of a September 2026 search.
- Vendor
- Chant Sincere Co., Ltd. (詮欣股份有限公司), Taiwan (the IEEE MA-L registry B816DB)
- Registry class
- IEEE MA-L (/24), two separate assignments (the IEEE MA-L registry B816DB, the IEEE MA-L registry 00179B)
- Prefixes
- B8:16:DB, 00:17:9B
- Device class
- Connectors and cable assemblies — RJ45, USB-C, HDMI, DisplayPort, M8/M12, SFP/QSFP (https://www.coxoc.com.tw/en/about/company/)
- Company
- Chant Sincere Co., Ltd. (詮欣股份有限公司) [Confirmed] (the IEEE MA-L registry B816DB)
- Registry class
- IEEE MA-L, Multiple assignments [Confirmed] (the IEEE MA-L registry B816DB, the IEEE MA-L registry 00179B)
- Prefixes
- B816DB, 00179B [Confirmed] (the IEEE MA-L registry)
- Registered address
- 7F-2, No. 188, Sec. 3, Ta Tung Road, Xizhi District, New Taipei City, Taiwan, ROC 22103 [Confirmed] (the IEEE MA-L registry B816DB)
- Country
- Taiwan (TW) [Confirmed] (the IEEE MA-L registry B816DB)
- Total prefix count
- 2, no MA-M or MA-S sub-assignments found [Confirmed] (the IEEE MA-S registry, the IEEE MA-M registry searched — no match)
- Org status
- Active, publicly traded — Taipei Exchange ticker 6205, founded 1985 [Confirmed] (https://finance.yahoo.com/quote/6205.TW/profile/)
- Device types
- Connectors and cable assemblies — RJ45, USB-C, HDMI, DisplayPort, FAKRA, D-Sub, M8/M12, SFP/QSFP [Likely] (https://www.coxoc.com.tw/en/about/company/)
- Specific MAC-bearing product
- Unknown — no public source ties a shipped device to either OUI block [Unknown]
- Security history
- No CVE, malware, or botnet association found as of a September 2026 search [Likely]
- Registration date
- Unknown — IEEE publishes no assignment date in the IEEE MA-L registry [Unknown] (the IEEE MA-L registry)