Selcom — 2 prefixes (MA-L); EMS/ODM appliance & CPE control boards, OUI = contract manufacturer (not a retail brand)

"Selcom" is not a single registrant — the name maps to two distinct IEEE MA-L (24-bit OUI) blocks held by two separate legal entities. 00:90:52 belongs to SELCOM ELETTRONICA S.R.L. of Via Grandi 5, 40013 Castelmaggiore (BO), Italy; F4:24:62 belongs to Selcom Electronics (Shanghai) Co., Ltd of A7/A24 No.5399 Waiqingsong Road, Qingpu, Shanghai 201707, China. Both addresses come straight from the IEEE public registry. Web sources indicate both entities operate under the "Selcom Group" EMS/ODM umbrella, but the registry itself records them as separate organisations, so anyone parsing the bare slug "vendor-selcom" should treat it as a two-entity disambiguation page rather than one company. The practical analyst angle is the same for both: Selcom is an Electronics Manufacturing Services / Original Design Manufacturing contract maker — it builds custom control boards and subsystems that ship inside other companies' finished products, not standalone Selcom-branded networking gear. Device categories reported across the two entities include home-appliance control boards (refrigerators, washing machines, dishwashers, microwave ovens), coffee/vending-machine electronics, automotive and industrial/building-automation boards, and (historically, for the Italian entity) ADSL CPE supplied under third-party broadband brands. So a 00:90:52 or F4:24:62 address on a network most likely identifies an embedded appliance or industrial control board, or operator-branded ADSL CPE — not a router or switch sold as "Selcom." No CVEs or public security advisories are associated with either OUI, and IEEE publishes no assignment dates for either block.

IEEE assignment (entry 1)

00:90:52 → "SELCOM ELETTRONICA S.R.L.", Castelmaggiore (BO), Italy [Confirmed] — IEEE MA-L (oui.csv line 1587)

IEEE assignment (entry 2)

F4:24:62 → "Selcom Electronics (Shanghai) Co., Ltd", Qingpu, Shanghai, China [Confirmed] — IEEE MA-L (oui.csv line 348)

Registry / block size

both MA-L (24-bit OUI; ~16.7M addresses each); 2 blocks across 2 legal entities [Confirmed] — IEEE MA-L. No MA-M (mam.csv) or MA-S (oui36.csv) assignment exists for any Selcom entity [Confirmed] — enrichment/registries/mam.csv, oui36.csv (no match)

HQ / country (entry 1)

Via Grandi 5, 40013 Castelmaggiore (BO), IT [Confirmed] — IEEE MA-L (oui.csv line 1587)

HQ / country (entry 2)

A7/A24 No.5399, Waiqingsong Road, Qing Pu Shanghai, Shanghai, CN 201707 [Confirmed] — IEEE MA-L (oui.csv line 348)

Registration date

Unknown — IEEE's public OUI data publishes NO assignment/registration date for either block (oui.csv columns are only Registry, Assignment, Organization Name, Organization Address). Third-party aggregators show artifact dates (e.g. maclookup.app lists "22 April 1998" for 00:90:52), but these are database artifacts, not IEEE facts, and are not stated here as authoritative. [Confirmed there is no IEEE date] — IEEE oui.csv (no date column)

Company status / group affiliation

both entities reported to operate under the "Selcom Group" EMS/ODM umbrella; treated by IEEE as two separate registrants [Likely — single-angle (web only); registry confirms only that they are distinct organisations] — selcomgroup.com, macvendorlookup.com

Device types

home-appliance control boards (refrigerators, washing machines, dishwashers, microwave ovens), coffee/vending-machine electronics, automotive and industrial/building-automation boards; Italian entity historically supplied ADSL CPE boards under third-party brands [Likely — web-sourced, single angle] — selcomgroup.com, electronicsmadeinitaly.com, matchory.com, panjiva.com

Notable products

custom EMS/ODM circuit boards and subsystems embedded in third-party finished products (white goods, vending, industrial, historically ADSL CPE) — no Selcom-branded networking hardware found

IANA reference

none — OUI is an IEEE construct, not IANA; the IANA Reference column does not apply and is left blank (not fabricated) [Confirmed]

Verified prefixes

00:90:52 (IT entity), F4:24:62 (CN entity) [Confirmed] — IEEE MA-L; cross-confirmed via macvendorlookup.com, hwaddress.com, maclookup.app

Slug disambiguation

the bare slug "vendor-selcom" maps to no single entry. The site's slugify()/normaliseName() logic strips legal suffixes and parenthetical city names, producing "selcom-electronics-shanghai" (F4:24:62) and "selcom-elettronica-s-r-l" (00:90:52); neither collapses to a plain "selcom" slug [Likely — derived from scripts/generate-oui-pages.js] — scripts/generate-oui-pages.js (slugify/normaliseName, lines 47-64)

Security context

no CVEs, public vulnerabilities, advisories, or threat-actor associations found for either entity as of June 2026; B2B contract manufacturer whose silicon appears inside other brands' products [Likely — absence of evidence] — no source (negative finding)

Related vendors

distinct from "Selcom Industries Inc." (selcom.com), a US-based contract manufacturer with no confirmed OUI link

Analyst note

A 00:90:52 or F4:24:62 address most likely identifies an embedded appliance/industrial control board or operator-branded ADSL CPE made by a contract manufacturer — not a Selcom-branded router or switch. Because Selcom builds boards for third parties, the device on the network is usually branded by someone else.