Green Energy Options Ltd — 2 prefixes (MA-L)

A MAC address starting with 78:07:1C or BC:6E:76 belongs to Green Energy Options Ltd, a UK smart-energy hardware company trading as "geo," and typically identifies a Zigbee-based smart-meter In-Home Display or a related home-network gateway device.

Green Energy Options Ltd holds two separate MA-L (24-bit, full /24) OUI blocks — 78:07:1C and BC:6E:76 — both registered under the same name and address: 3 St. Mary's Court, Main Street, Cambridge, Cambridgeshire, GB CB23 7QS. Two independent dedicated allocations, rather than a single bare registration, point to a company shipping enough distinct networked hardware to need more than one block.

The company, based in Cambridge, England, builds hardware for the UK smart-metering ecosystem: In-Home Displays (including an RNIB-certified Accessible IHD), a Zigbee Home Area Network Extender ("HAN-E"), a Virtual WAN gateway that uses home broadband instead of cellular backhaul, and a Matter-ready device called "SeeZero." Its own site and an independent LinkedIn company page corroborate that it is a real, currently operating business.

No source ties either specific prefix to one named product rather than the other, so the device-type list below is company-wide, not per-block. IEEE's public OUI registry carries no assignment-date field for these two prefixes; a third-party aggregator shows its own database-crawl timestamps for this vendor, which are not IEEE facts and are not reported here as a registration date.

A separate, unrelated company named "EBE Mobility & Green Energy GmbH" (Austria) holds a 36-bit sub-allocation (70:B3:D5:62:4/36) beneath the shared IEEE base 70:B3:D5. That slice belongs only to that Austrian company, not to Green Energy Options Ltd, and the shared base itself belongs to neither.

IEEE assignment

78:07:1C, BC:6E:76 → Green Energy Options Ltd, registered Cambridge, Cambridgeshire, GB [Confirmed] — the IEEE MA-L registry 78071C, the IEEE MA-L registry BC6E76

Registry / block size

MA-L (24-bit OUI); 2 IEEE prefixes found for this registrant [Confirmed] — the IEEE MA-L registry

HQ / country

3 St. Mary's Court, Main Street, Cambridge, Cambridgeshire, GB CB23 7QS [Confirmed] — the IEEE MA-L registry

Company status

active, trading as "geo" [Confirmed] — https://geotogether.com/

Device types

Zigbee-based In-Home Displays, HAN Extender, Virtual WAN gateway, SeeZero [Likely] — https://geotogether.com/connectivity/ (vendor's own site; not tied to either specific prefix)

Notable products

In-Home Display (IHD), RNIB-certified Accessible IHD, HAN Extender ("HAN-E"), Virtual WAN (VWAN) gateway, SeeZero [Confirmed] — https://geotogether.com/connectivity/

Verified sample prefixes (both MA-L, Green Energy Options Ltd)

78:07:1C, BC:6E:76 [Confirmed] — the IEEE MA-L registry 78071C, the IEEE MA-L registry BC6E76, the Wireshark manufacturer database 78:07:1C, the Wireshark manufacturer database BC:6E:76

Registration date

Unknown — IEEE's public OUI data (the IEEE MA-L registry: Registry, Assignment, Organization Name, Organization Address) publishes no assignment-date field for these prefixes; a third-party aggregator's "First Seen"/"Last Mod" fields are database-crawl artifacts, not IEEE facts

[Unknown] — the IEEE MA-L registry

Historic block

Unknown — no older or additional registration for this company was found in the IEEE MA-L registry, the IEEE MA-M registry, or the IEEE MA-S registry [Unknown]

Special note

registries/oui36.csv holds an unrelated, similarly-named company, "EBE Mobility & Green Energy GmbH" (Austria), as a 36-bit sub-allocation (70:B3:D5:62:4/36) of the shared IEEE base 70:B3:D5; this base and that slice belong to that company, not to Green Energy Options Ltd, and must not be conflated with it

[Confirmed] — the IEEE MA-S registry 70B3D5624

Related vendors

none identified as related; the similarly-named EBE Mobility & Green Energy GmbH (Austria) is confirmed unrelated [Confirmed] — the IEEE MA-S registry 70B3D5624

Security context

no CVE, advisory, or documented vulnerability tying a Green Energy Options / geo device to a named security issue found as of an August 2026 search [Unknown]

Analyst note

a MAC starting 78:07:1C or BC:6E:76 identifies Green Energy Options Ltd (geo) hardware from the UK smart-metering ecosystem; both blocks are dedicated full MA-L /24 allocations, not slices of a shared IEEE base, so no shared-base disclaimer applies to them — but do not extend any claim in this entry to the unrelated EBE Mobility & Green Energy GmbH sub-allocation or to the shared base 70:B3:D5

[Confirmed] — the IEEE MA-L registry, the IEEE MA-S registry 70B3D5624