Sky UK Limited — 39 prefixes (MA-L)

Sky UK Limited is a British telecommunications and pay-TV company whose 39 MA-L blocks (confirmed directly from the cached IEEE the IEEE MA-L registry) sit on the customer-premises equipment it ships across the United Kingdom: broadband routers and hubs (the Sky Hub SR101, SR102, SR203, ER110, ER115 and EE120 series, plus Booster variants) and TV and streaming devices (Sky Q set-top boxes, the Sky Stream puck, and Sky Glass smart TVs). Consolidating Sky into a single vendor entry is more useful than minting near-identical per-prefix pages, because all 39 blocks resolve to the same operator and the same CPE fleet — a Sky Q box, for instance, exposes separate MACs for its Wi-Fi and Ethernet interfaces, and both draw from these allocations. Two registry addresses appear across the blocks: the older 130 Kings Road, Brentwood, Essex address carries the majority of registrations, while eight prefixes (BC85D0, 140805, C46026, D4F04A, E87640, FCD290, C8965A, C8DE41) carry Sky's current corporate head office at Grant Way, Isleworth, Middlesex, TW7 5QD. The analyst-relevant caveat for Sky OUI work is security history rather than randomization: the "SkyFail" DNS-rebinding vulnerability (disclosed May 2020, patched October 2021 — roughly 17 months) exposed an estimated six million Sky routers across the SR101/SR102/SR203/ER110/ER115/EE120 line, made trivial on older hubs by the default admin:sky credentials; it is fully patched as of late 2021, with Sky Hub 4 / Booster 4 (SR203/SE210) shipping per-device random admin passwords.

IEEE assignment

39 prefixes → SKY UK LIMITED, registered GB (United Kingdom) [Confirmed] — IEEE MA-L

Registry / block size

MA-L (24-bit OUI); holds 39 IEEE prefixes (~654M addresses; all globally-scoped, non-local) [Confirmed] — the IEEE MA-L registry; maclookup.app (address-count estimate is third-party). NOTE: IEEE's public OUI data publishes NO assignment/registration date; the IEEE MA-L registry columns are only Registry, Assignment, Organization Name, Organization Address. maclookup.app's "initial registration 2006-11-29 / updated 2024-12-10" dates are third-party database artifacts, not IEEE facts.

Registered addresses

(1) 130 Kings Road, Brentwood, Essex, GB — majority of blocks; (2) Grant Way, Isleworth, Middlesex, GB TW7 5QD — current head office, on 8 prefixes (BC85D0, 140805, C46026, D4F04A, E87640, FCD290, C8965A, C8DE41) [Confirmed] — IEEE MA-L

Country

GB (United Kingdom) [Confirmed] — IEEE MA-L

Company status

active [Confirmed] — sky.com; maclookup.app

Device types

broadband routers/hubs (Sky Hub SR101, SR102, SR203, ER110, ER115, EE120 + Booster variants); TV set-top boxes (Sky Q); IPTV streaming (Sky Stream puck); smart TVs (Sky Glass) [Confirmed] — netify.ai, maclookup.app, broadband.co.uk, avforums.com, helpforum.sky.com

Notable products

Sky Q, Sky Stream, Sky Glass, Sky Hub broadband line

Other registries

none — SKY UK LIMITED has no entries in the IEEE MA-M registry (MA-M) or the IEEE MA-S registry (MA-S) [Confirmed] — registry CSV scan

Verified sample prefixes (all MA-L, SKY UK LIMITED)

3C9EC7, B04530, 6CA0B4, BC85D0, 140805 [Confirmed] — IEEE MA-L

Registration date

Unknown — IEEE publishes no registration date for OUI/MAC prefixes; the 2006-11-29 date from maclookup.app is a third-party database artifact, not a first-party fact [Likely artifact] — maclookup.app

Special note (security)

"SkyFail" DNS-rebinding vulnerability — disclosed May 2020, patched October 2021 (~17 months exposed); ~6M routers affected (SR101, SR102/SB601, SR203/SE210, ER110, ER115, EE120 + Booster variants). Exploitation eased by default admin:sky credentials on older hubs; required victim to click a malicious link. No CVE number published in available sources. Patched as of late 2021; Sky Hub 4 / Booster 4 ship per-device random admin passwords.

[Confirmed] — pentestpartners.com, bleepingcomputer.com, heimdalsecurity.com

Analyst note

a globally-administered Sky UK OUI on an interface identifies genuine Sky CPE (router, Sky Q/Stream/Glass) for asset classification; Sky does not use vendor-level MAC randomization, so these prefixes are reliable identifiers. For inventory, note that a single Sky Q device can present multiple MACs (Wi-Fi + Ethernet).