The OUI prefix 94:7F:1D is registered to Shenzhen Fastrain Technology Co., Ltd., a Shenzhen, China-based contract manufacturer in the optical-communications hardware space. The registry address is No.3 Baolong 4th Rd., Baolong Industrial Area, Longgang District, Shenzhen, Guangdong 518000, CN. A single MA-L (OUI-24) block is assigned to this organization; no MA-M (oui36.csv) or MA-S (mam.csv) entries were found, so Fastrain's IEEE footprint is one full 24-bit block (~16.7M addresses). Fastrain operates as an electronic-manufacturing-services (EMS) supplier rather than a consumer or enterprise networking brand: its catalog centers on high-speed optical transceiver modules (SFP+, QSFP28, CFP2, QSFP-DD, OSFP, coherent ZR), active optical cables, and CATV transmitters, built for optical-comms, maritime-comms, and automotive-electronics OEM customers. The practical consequence for asset classification: hardware presenting this OUI is most likely an optical module or optical-networking line card manufactured or co-designed by Fastrain for an OEM client, not a Fastrain-branded end product. As with every MAC prefix, no IEEE registration date exists — IEEE publishes none — so any "first seen" date from third-party lookup tools is a database artifact, not a registration fact.
- IEEE assignment
- 94:7F:1D → Shenzhen Fastrain Technology Co., Ltd. [Confirmed] — IEEE MA-L (oui.csv, enrichment/registries/oui.csv line 839)
- Registry / block size
- MA-L (24-bit OUI / OUI-24); one prefix (~16.7M addresses) [Confirmed] — enrichment/registries/oui.csv; not present in mam.csv (MA-M) or oui36.csv (MA-S). NOTE: IEEE public OUI data publishes NO assignment/registration date; any "date registered" on third-party tools is a database artifact, not an IEEE fact.
- Registered address / country
- No.3 Baolong 4th Rd., Baolong Industrial Area, Longgang District, Shenzhen, Guangdong 518000, CN [Confirmed] — IEEE MA-L; https://www.macvendorlookup.com/search/fastrain
- Company status
- active [Likely] — https://en.fastrain.com/about-us
- Vendor type
- EMS / contract manufacturer for optical communications (not a branded networking-device vendor) [Likely] — https://en.fastrain.com/about-us, https://ofc-expo.com/online-exhibit-hall/www-fastrain-com
- Device types
- optical transceiver modules (SFP+, QSFP28, CFP2, QSFP-DD, OSFP), active optical cables (AOC), coherent ZR modules, CATV transmitters, PCBA components [Likely] — https://en.fastrain.com/optical, https://ofc-expo.com/online-exhibit-hall/www-fastrain-com
- Company profile
- Shenzhen HQ with operations cited in Singapore, Malaysia, Hong Kong; positions as an optical/AI-computing manufacturing partner; exhibited at OFC. Founding year (~2019) and headcount (~700) come from third-party aggregators and are not first-party confirmed [Likely] — https://en.fastrain.com/about-us, https://www.zoominfo.com/c/fastrain/481896850
- Vendor website
- https://en.fastrain.com/ [Confirmed] — https://en.fastrain.com/about-us
- Security context
- no CVEs or Fastrain-specific public advisories found as of 2026-06-21; generic third-party optical-transceiver supply-chain risks (counterfeit, unvalidated firmware, lack of OEM certification) apply but no Fastrain-attributed incident surfaced [Likely] — https://nvd.nist.gov/vuln
- Registration date
- Unknown — IEEE publishes no OUI registration dates; a maclookup.app "first seen" of 2021-07-21 is a third-party database artifact only, not an IEEE fact [Unknown] — https://maclookup.app/vendors/fastrain
- Analyst note
- a 94:7F:1D OUI on a globally-administered address indicates Fastrain-manufactured hardware (most likely an optical module/line card for an OEM); because Fastrain builds for hire, the end-product brand may differ from "Fastrain."