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.

Vendor

Green Energy Options Ltd (trading as "geo")

Device class

Smart-meter In-Home Display (IHD), Zigbee HAN Extender, Virtual WAN gateway

OUI prefixes

78:07:1C, BC:6E:76 (both MA-L, full /24)

Country

United Kingdom (GB)

Also seen on

SeeZero, a Matter-ready device (geotogether.com/connectivity/)

Not to be confused with

EBE Mobility & Green Energy GmbH (Austria), an unrelated company holding a different shared-base sub-allocation (70:B3:D5:62:4/36)

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