eSSys Co., Ltd. — 6 prefixes (MA-L)

A MAC address beginning with 28:CF:08, 48:7A:FF, A8:B9:B3, C0:CA:A2, EC:AB:3E, or 68:84:70 belongs to eSSys Co., Ltd., a South Korean automotive-electronics manufacturer founded in 2005. It shows up on in-vehicle telematics, AVN (audio-video-navigation), ETCS, and V2X/DSRC connectivity modules built into cars, not on general consumer devices.

IEEE's MA-L registry (the IEEE MA-L registry) confirms exactly six blocks in the eSSys/ESSYS family, with no MA-M or MA-S hits. Four blocks — 28:CF:08, 48:7A:FF, C0:CA:A2, EC:AB:3E — are registered under "ESSYS" at an Incheon, South Korea address. Two blocks — A8:B9:B3 and 68:84:70 — share a Seoul address, Daerung Post Tower 5 15F, Geumcheon-gu, one under "ESSYS" and one under "eSSys Co.,Ltd".

This entry treats all six blocks as one company, not a coincidental name collision. The two Seoul blocks share a building; all six share the eSSys/ESSYS org-name family; and independent sources — an FCC filing naming eSSys as Seoul-based, an NXP partnership, and a named security-reseller role — confirm a single active company with no evidence of a second distinct "eSSys" entity in Korea.

An FCC equipment authorization (ID 2ADQJ-EWBP1BR1) for a DSRC wireless module, granted August 2016, names "eSSys Co., Ltd, a South Korean firm based in Seoul." An NXP press release names eSSys as a delivery partner on a Korean government intelligent-transport pilot. A 2017 announcement names eSSys as reseller of Security Innovation's Aerolink V2X security stack, and a current EtherCAT Technology Group listing describes eSSys building telematics, AVN, ETCS, and V2X/DSRC automotive electronics.

No registration or assignment dates are recorded for any of the six blocks. IEEE's public OUI data does not publish assignment dates, and third-party "registered" dates seen on aggregator sites are database artifacts, not IEEE facts.

Company identity

eSSys Co., Ltd., South Korean automotive electronics manufacturer, founded 2005, HQ Seoul [Confirmed] — https://www.nxp.com/company/about-nxp/newsroom/NW-ESSYS-TRANSPORT-KOREA, https://fccid.io/2ADQJ-EWBP1BR1 ("a South Korean firm based in Seoul")

Registry prefixes (Incheon "ESSYS" group, 4 blocks

28:CF:08, 48:7A:FF, C0:CA:A2, EC:AB:3E), MA-L, address "gaetbeol-ro, Incheon, KR 21999" [Confirmed] — the IEEE MA-L registry, direct read (lines 10163, 25230, 31655, 23826)

Registry prefix (Seoul-Daerung "ESSYS", 1 block

A8:B9:B3), MA-L, address "Daerung Post Tower 5 15F, Seoul Gasan-Dong, Geumcheon-gu, KR 153-702" [Confirmed] — the IEEE MA-L registry, direct read (line 11478)

Registry prefix (Seoul-Daerung "eSSys Co.,Ltd", 1 block

68:84:70), MA-L, address "Daerung Post Tower 5 15F, 60-3, Seoul Geumcheon-gu, KR 153-702" [Confirmed] — the IEEE MA-L registry, direct read (line 19933)

Relationship between the Incheon "ESSYS" group and the Seoul "ESSYS"/"eSSys Co.,Ltd" blocks

same company, one consolidated vendor entry [Confirmed] — the IEEE MA-L registry (all six records share the "essys"/"ESSYS" org-name family; the two Seoul records additionally share the identical Daerung Post Tower 5 15F, Geumcheon-gu building address), corroborated by independent single-company evidence with no indication of a second distinct "eSSys" entity: https://fccid.io/2ADQJ-EWBP1BR1, https://www.nxp.com/company/about-nxp/newsroom/NW-ESSYS-TRANSPORT-KOREA

Total prefix count

exactly 6 MA-L blocks, no MA-M or MA-S hits [Confirmed] — the IEEE MA-L registry (6 matches), the IEEE MA-M registry (0 matches), the IEEE MA-S registry (0 matches), all direct cached-registry reads; confirmed against the cached canonical registry

Device/product context

DSRC wireless module, FCC ID 2ADQJ-EWBP1BR1, filed/granted 2016-08-02, OEM-integration only, matches eSSys's stated V2X product line [Confirmed] — https://fccid.io/2ADQJ-EWBP1BR1

NXP partnership

eSSys named delivery partner for a Korean government intelligent-transport pilot, 2016 [Confirmed] — https://www.globenewswire.com/news-release/2016/07/20/857300/0/en/NXP-and-eSSys-To-Deliver-Intelligent-Transport-Technologies-For-Korean-Government-s-Pilot-Project.html

Security-industry reseller status

named reseller of Security Innovation's (OnBoard Security's) Aerolink V2X security stack in South Korea, 2017 [Confirmed] — https://www.globenewswire.com/news-release/2017/01/09/904542/0/en/Security-Innovation-Appoints-eSSys-to-Resell-Aerolink-V2X-Security-in-South-Korea.html, https://www.onboardsecurity.com/company/news-and-events/press-releases/security-innovation-appoints-essys-to-resell-aerolink-v2x-security-in-south-korea

Company status

active [Confirmed] — https://www.ethercat.org/en/members/members_18F81581D55D4DD2BD653C1A9D09A67B.htm (current members-directory listing, checked this pass)

Company website

the essys.co.kr root domain is live this pass (a Korean-language storefront-style shell with minimal company text) but the previously-cited English product page essys.co.kr/en/rnd03.html now returns HTTP 404 — that URL is no longer a usable source

[Confirmed] — http://www.essys.co.kr/, http://www.essys.co.kr/en/rnd03.html (404 this pass)

South Korea C-ITS Pilot Project role

third-party aggregation describes eSSys as sole vendor for OBE/RSE/Applications on the Ministry of Land, Transport and Maritime's C-ITS Pilot Project [Likely] — search-result summary of https://intl.its.go.kr/promote/getCompanyIntroView (the underlying ITS Korea page returned HTTP 500 on direct fetch this pass, so it could not be independently re-read)

Registration/assignment dates for all six prefixes [Unknown] — IEEE MA-L publishes no assignment dates; none invented