Synclayer Inc. is a publicly-listed Japanese telecommunications-equipment maker (Tokyo Stock Exchange ticker 1724) that builds and integrates CATV and fiber-optic broadband infrastructure. It holds two MA-L (24-bit OUI) blocks in the IEEE registry — 00:60:6B and 9C:40:CD — both registered to the same Gifu-prefecture address (1-20 Himegaoka, Kani, Gifu 509-0249, Japan). The two prefixes span a wide age range: 00:60:6B sits in the low, early-1990s allocation range while 9C:40:CD is a far more recent assignment, which is consistent with a company that has shipped network hardware across multiple device generations. Synclayer's product line is cable-plant and access-network gear: cable modems, CMTS components, broadband LAN systems, FTTH/FTTO optical network units (ONU), fiber-optic access equipment, and home-monitoring devices; the company also resells ARRIS CMTS and cable-modem products. Because both blocks are globally-administered, a 00:60:6B or 9C:40:CD prefix reliably identifies genuine Synclayer hardware for asset classification — useful in cable-operator and broadband-access inventories where this gear actually appears. No CVEs or public security incidents specific to Synclayer-branded devices were found; the broader Broadcom-chipset cable-modem class carries the "Cable Haunt" family of vulnerabilities, but whether any Synclayer device uses affected reference firmware is Unknown without firmware analysis.
- IEEE assignment
- 2 MA-L prefixes → Synclayer Inc., registered Kani, Gifu, JP [Confirmed] — IEEE oui.csv (lines 857, 6161)
- Registry / block size
- MA-L (24-bit OUI), 2 prefixes; each block covers ~16M addresses [Confirmed] — IEEE oui.csv / maclookup.app
- Verified prefixes (both MA-L, Synclayer Inc.)
- 00:60:6B, 9C:40:CD [Confirmed] — IEEE oui.csv; maclookup.app (https://maclookup.app/macaddress/00606B, https://maclookup.app/macaddress/9C40CD)
- HQ / country
- 1-20 Himegaoka, Kani, Gifu 509-0249, Japan (OUI registry address); corporate operations in Nagoya, Japan [Confirmed] — IEEE oui.csv; https://www.synclayer.co.jp/en/information/
- Company status
- active; publicly listed on Tokyo Stock Exchange (ticker 1724), founded 1962 [Confirmed] — https://www.synclayer.co.jp/en/information/, https://finance.yahoo.com/quote/1724.T/profile/
- Device types
- CATV cable modems, CMTS components, broadband LAN systems, FTTH/FTTO optical network units (ONU), fiber-optic access equipment, home-monitoring devices [Confirmed] — https://www.synclayer.co.jp/en/concept/, https://www.synclayer.co.jp/en/information/
- Industry sector
- telecommunications — CATV network system integration and fiber-optic broadband infrastructure [Confirmed] — https://www.synclayer.co.jp/en/information/
- Registration date
- Unknown — IEEE publishes NO assignment/registration date for OUI/MAC blocks (oui.csv columns are Registry, Assignment, Organization Name, Organization Address only). Third-party "date registered" values (1998-04-22 for 00:60:6B; 2021-06-24 for 9C:40:CD on maclookup.app) are database artifacts, not IEEE facts [Confirmed] — IEEE oui.csv; https://maclookup.app/macaddress/00606B
- MA-M / MA-S registry
- no match in mam.csv (MA-M) or oui36.csv (MA-S) — Synclayer holds only MA-L blocks [Confirmed] — IEEE mam.csv, oui36.csv (no matches)
- Security context
- no Synclayer-specific CVE or public incident found in NVD/JVN/CVEDetails; general CATV/Broadcom cable-modem class is subject to "Cable Haunt" (CVE-2019-19494 and related); Synclayer-specific exposure Unknown [Likely / Unknown for Synclayer specifics] — https://en.wikipedia.org/wiki/Cable_Haunt
- Website
- https://www.synclayer.co.jp/en/ [Confirmed] — https://www.synclayer.co.jp/en/concept/
- Analyst note
- a 00:60:6B or 9C:40:CD prefix on a globally-administered address identifies genuine Synclayer hardware; these prefixes turn up in cable-operator and broadband-access deployments, not consumer Wi-Fi inventories.