Chipsguide Technology CO.,LTD. is a small Shenzhen-based Bluetooth consumer-accessory OEM, not a chip or silicon maker despite the name. It holds two IEEE allocations: an MA-L (24-bit) block F4:2B:7D and an MA-M (28-bit) sub-block 3C:39:E7:B, both registered to the same firm at No.758 DongHua Design House, NanGuang Road, Nanshan District, Shenzhen, Guangdong, China. The two registry records carry slightly different org spellings and postal codes (518002 on the MA-L, 518000 on the MA-M) — a normal artifact of separate IEEE filings. The company's hardware footprint is consumer Bluetooth: smart color lamps, car FM transmitters and car media players, and similar BLE accessories, several built as OEM work for better-known brands (Xiaomi, Philips, TCL, NFL, NBA) via its subsidiary Haiyu Technology Co., Ltd. Its iOS apps — i-lamp, iCarPlayer, and Bluetooth Color Lamp (developer ID 923930770) — are lightly maintained, with some last updated in 2015 and none carrying Apple privacy disclosures. The subsidiary domain szptstech.com is parked/for-sale, suggesting a reduced external web presence. For network triage: addresses on these prefixes are most likely consumer Bluetooth IoT gadgets, low enterprise relevance. As with all OUI assignments, IEEE publishes no registration dates — third-party "registered" dates (2022 for the MA-L, 2016 for the MA-M) are database artifacts, not first-party facts.
- IEEE assignment (MA-L)
- F4:2B:7D → "Chipsguide technology CO.,LTD.", Shenzhen, Guangdong, CN 518002 [Confirmed] — cached IEEE oui.csv; corroborated by maclookup.app (https://maclookup.app/macaddress/F42B7D)
- IEEE assignment (MA-M)
- 3C:39:E7:B → "chipsguide technology Co.,LTD", Shenzhen, Guangdong, CN 518000 [Confirmed] — cached IEEE mam.csv; corroborated by macvendorlookup.com (https://www.macvendorlookup.com/search/3C:39:E7:B0:00:00)
- Registry / block sizes
- F4:2B:7D = MA-L (24-bit, ~16.7M addresses); 3C:39:E7:B = MA-M (28-bit, 4,096 addresses). Total 2 blocks. [Confirmed] — maclookup.app, macvendorlookup.com
- No IEEE date
- IEEE public OUI/MA-M data publishes NO assignment/registration date. Third-party tools show 2022-05-20 (MA-L) and 2016-02-05 (MA-M); these are database artifacts, not IEEE facts. [Unknown] — https://maclookup.app/vendors/chipsguide-technology-co-ltd
- HQ / country
- No.758 DongHua Design House, NanGuang Road, Nanshan District, Shenzhen, Guangdong 518000, China (CN) [Confirmed] — IEEE registry + maclookup.app (https://maclookup.app/macaddress/F42B7D)
- Company status
- active as of 2026-06-19 research; App Store developer presence active. Subsidiary Haiyu Technology Co., Ltd (founded 2016) website szptstech.com parked/for-sale, indicating reduced web presence. [Likely] — https://www.linkedin.com/company/shenzhen-pts-technology-co.-ltd , https://itunes.apple.com/us/developer/chipsguide-technology-co-ltd/id923930770
- Device types
- consumer Bluetooth accessories — smart color lamps, car FM transmitters / car media players, BLE 4.0 IoT gadgets [Confirmed] — https://apps.apple.com/us/app/icarplayer/id956112979 , https://i-lamp.appstor.io/
- Notable products
- i-lamp (BLE smart color lamp controller), iCarPlayer (BLE FM transmitter / car music app), Bluetooth Color Lamp; OEM Bluetooth hardware sold under Xiaomi, Philips, TCL and other brands via subsidiary [Confirmed] — https://i-lamp.appstor.io/ , https://apps.apple.com/us/app/icarplayer/id956112979 , https://www.linkedin.com/company/shenzhen-pts-technology-co.-ltd
- Industry
- consumer electronics / Bluetooth device OEM (not a chipset/silicon vendor; OUIs appear on end-consumer devices) [Confirmed] — https://www.linkedin.com/company/shenzhen-pts-technology-co.-ltd
- Vendor website
- Unknown — no authoritative company site found; subsidiary szptstech.com parked/for-sale. App Store developer page: https://apps.apple.com/us/developer/chipsguide-technology-co-ltd/id923930770 [Unknown] — https://itunes.apple.com/us/developer/chipsguide-technology-co-ltd/id923930770
- Security context
- no CVEs or named security research found for Chipsguide. iOS apps lack Apple privacy disclosures; several last updated 2015 (iOS 7 minimum), i.e. largely unmaintained. Generic BLE-accessory risk class only; no vendor-specific findings. [Likely] — https://apps.apple.com/us/app/icarplayer/id956112979 , https://apps.apple.com/us/app/id946833069
- Analyst note
- addresses on F4:2B:7D / 3C:39:E7:B are most likely consumer Bluetooth gadgets (lamps, FM transmitters, OEM accessories). Low enterprise relevance; moderate consumer-IoT triage signal. [Likely] — maclookup.app, LinkedIn, App Store