CRESYN (Cresyn Co., Ltd.) — 6 prefixes (MA-L)
Summary
- // what this is
- CRESYN / Cresyn is registered to MAC prefix
00:18:09and 5 more in the IEEE OUI database. When a device's MAC address begins with00:18:09, that block was registered by CRESYN / Cresyn — the OUI identifies the maker of the network hardware, which is not always the brand on the device. - // analyst note
- Six independent MA-L allocations to the same Seoul-based company, corroborated by an active corporate footprint (site, trade-directory listings, named product lines) outside any MAC-lookup database — clears the shell-registration bar with room to spare.
About this vendor.
CRESYN is a South Korean audio-accessory manufacturer holding six separate MA-L OUI blocks — 00:18:09, 14:06:A7, 30:53:C1, 74:45:CE, E8:9E:13, and BC:2B:1E — registered under two organization-name spellings at two Seoul addresses: the legacy "CRESYN" name at 8-22 Jamwon-dong, Seocho-Gu (five blocks), and the newer "Cresyn Co., Ltd." at CRESYN B/D, Gangnam-daero 107-gil, Seocho-gu, 06254 (BC:2B:1E). Company-history sources describe an origin as the Daehan Phonographic Needle Factory (est. 1959), a move into headphone manufacturing in 1985, the "Cresyn" headphone brand launching in 2002, and ownership of the Phiaton premium-headphone brand (2008). Six independent MA-L allocations to one corporate identity, plus an independently verifiable web/trade-directory footprint, is a strong signal against a bare single-OUI shell registration — this consolidates cleanly into one vendor entry rather than six near-duplicate stubs.
- IEEE assignment
- 6 MA-L blocks (00:18:09, 14:06:A7, 30:53:C1, 74:45:CE, E8:9E:13, BC:2B:1E) → CRESYN / Cresyn Co., Ltd. [Confirmed] — local IEEE the IEEE MA-L registry snapshot (the IEEE MA-L registry, lines 7015/8016/23361/28572/32306/33267); no MA-M/MA-S entries in the IEEE MA-S registry or the IEEE MA-M registry
- Registry / block size
- MA-L (24-bit OUI) only, 6 blocks total in the cached snapshot [Confirmed] — the IEEE MA-L registry
- HQ / country
- Seoul, South Korea. Two registry addresses on file: 8-22 Jamwon-dong, Seocho-Gu #137-902 (5 blocks) and CRESYN B/D, Gangnam-daero 107-gil, Seocho-gu, 06254 (BC:2B:1E, apparently a more recent registration) [Confirmed] — IEEE MA-L
- Company status
- active [Likely] — cresyn.com
- Device types
- headphones, earphones, wireless/Bluetooth headsets [Likely] — TradeKorea (cresyn.tradekorea.com), Wikipedia (Phiaton)
- Company history
- founded 1959 as Daehan Phonographic Needle Factory; headphone manufacturing since 1985; "Cresyn" brand launched 2002; owns the Phiaton brand (launched 2008, premium US-market headphones) [Likely] — korean-electronics.com, en.wikipedia.org/wiki/Phiaton
- Notable products
- Cresyn-branded earphones/headsets; Phiaton premium headphones (sister brand) [Likely] — cresyn.com, Wikipedia
- Verified sample prefixes
- 00:18:09, E8:9E:13, 30:53:C1 [Confirmed] — IEEE MA-L / maclookup.app
- date_registered
- Unknown / not applicable — IEEE's public OUI data (the IEEE MA-L registry columns: Registry, Assignment, Organization Name, Organization Address) publishes no assignment/registration date; maclookup.app's third-party "date registered" values for two of these blocks (16 Jun 2023 for E8:9E:13; 21 Dec 2021 for 30:53:C1) are database artifacts, not IEEE facts, and were not independently corroborated against IEEE this cycle (a direct standards-oui.ieee.org fetch returned HTTP 418) [Confirmed]
- iana_reference
- blank — not applicable to an OUI/MA-L entry; none fabricated [Confirmed]
- Related vendors
- Phiaton (sister brand; may hold separate OUI registrations, not confirmed this cycle)
- Analyst note
- Six independent MA-L allocations to the same Seoul-based company, corroborated by an active corporate footprint (official site, trade-directory listings, named product lines) outside any MAC-lookup database — clears the shell-registration abstention bar.