The slug "vendor-halo" does not resolve to a single IEEE registrant: the cached IEEE registries contain no key named "vendor-halo" (IEEE keys are hex OUI prefixes, not slugs), and two separate MA-L blocks match the word "Halo." Both are documented here so the vendor page is honest about the ambiguity. The first, 68:50:5D — "Halo Technologies" (registry address 15775 Gateway Cir, Tustin, CA), is the active and more likely primary target: it is the optical-networking business formed in 2017 by merging ProLabs (UK) and AddOn Computer Peripherals (California), acquired by Amphenol Corporation on December 1, 2021, and selling compatible/third-party optical transceivers (SFP, SFP+, QSFP+, QSFP28), DACs, AOCs, and passive fiber cabling under the AddOn Networks, ProLabs, and Skylane Optics brands. The second, 00:24:40 — "Halo Monitoring, Inc." (registry address 515 Sparkman Dr, Huntsville, AL), is defunct: it made the myHalo personal emergency response system — a wearable sensor plus a home gateway for senior care — and was acquired by MobileHelp in September 2012, with the product line absorbed. A 00:24:40 MAC seen on a network today is legacy pre-2012 hardware with no active vendor support. No CVEs or public threat reports are tied to either OUI prefix. Critically, IEEE publishes no assignment dates for either block; the "registration date" values shown on third-party tools are database artifacts, not IEEE facts.
- IEEE assignment (primary)
- 68:50:5D → "Halo Technologies", registry address 15775 Gateway Cir, Tustin, CA 92780, US [Confirmed] — IEEE MA-L via macvendorlookup.com (https://www.macvendorlookup.com/search/68505D)
- IEEE assignment (secondary)
- 00:24:40 → "Halo Monitoring, Inc.", registry address 515 Sparkman Dr, Huntsville, AL 35816, US [Confirmed] — IEEE MA-L via macvendorlookup.com (https://www.macvendorlookup.com/search/002440)
- Registry / block size
- both are MA-L (24-bit OUI) [Confirmed] — IEEE MA-L. NOTE: IEEE's public OUI data publishes NO assignment/registration date (columns are only Registry, Assignment, Organization Name, Organization Address). The "24 March 2023" (68:50:5D) and "9 November 2008" (00:24:40) values on maclookup.app are third-party database artifacts, not IEEE facts. (https://maclookup.app/vendors/halo-technologies, https://maclookup.app/vendors/halo-monitoring-inc)
- Slug disambiguation
- "vendor-halo" is not an IEEE identifier and does not derive cleanly from either company name via the site's normaliseName/slugify path ("Technologies"/"Monitoring" are not suffix-stripped); it is likely a batch-selector shortening of "Halo Technologies" [Likely] — repo generate-oui-pages.js slugify behavior + IEEE registry inspection (enrichment/registries/oui.csv)
- Company status (68
- 50:5D): active; legal entity Halo Technology Limited, a subsidiary of Amphenol Corporation since the December 1, 2021 acquisition (~$715M) [Confirmed] — Amphenol IR (https://investors.amphenol.com/news-and-events/news-details/2021/Amphenol-Corporation-Announces-Acquisition-of-Halo-Technology-and-Closing-of-Sale-of-MTS-Test--Simulation-Business/default.aspx), halotechnology.com (https://www.halotechnology.com/contact)
- Company status (00
- 24:40): defunct; acquired by MobileHelp in September 2012, brand and product line absorbed [Confirmed] — MobileHelp (https://www.mobilehelp.com/pages/mobilehelp-strengthens-its-mpers-technology-with-acquisition-of-halo-monitoring-inc)
- Company history (68
- 50:5D): formed 2017 as a merger of ProLabs (UK) and AddOn Computer Peripherals (California) under Inflexion Private Equity [Confirmed] — Fibre Systems (https://www.fibre-systems.com/news/inflexions-prolabs-and-addon-form-halo-technologies)
- Device types (68
- 50:5D): compatible/third-party optical transceivers (SFP, SFP+, SFP28, QSFP+, QSFP28), DACs, AOCs, passive fiber optic cabling, media converters; sold under AddOn Networks, ProLabs, Proline Options, Skylane Optics, Solid Optics, Aria Tech brands [Likely] — no independent device sightings under 68:50:5D found in open sources; product set per halotechnology.com / addonnetworks.com / prolabs.com (https://www.addonnetworks.com/products/transceivers, https://www.prolabs.com/products/optical-transceivers/)
- Device types (00
- 24:40): home gateway hub for the myHalo personal emergency response system; dual WAN (broadband primary, POTS failover); communicates wirelessly with a wearable chest-strap sensor (fall detection, heart rate, temperature); circa 2008–2012, discontinued [Confirmed] — ManualsLib myHalo manual (https://www.manualslib.com/manual/2811580/Halo-Monitoring-Myhalo.html), MobileHelp acquisition release
- Industry
- 68:50:5D = data communications / optical networking; 00:24:40 = home health / personal emergency response (PERS) [Confirmed] — vendor + acquisition sources above
- Notable products
- 68:50:5D = AddOn / ProLabs compatible transceivers; 00:24:40 = myHalo PERS
- Wireless protocol (00
- 24:40 sensor↔gateway): Unknown — not specified in available documentation [Unknown] — ManualsLib myHalo manual (https://www.manualslib.com/manual/2811580/Halo-Monitoring-Myhalo.html)
- Security context
- no CVEs, public threat reports, or scanning/exposure notes tied to either OUI prefix [Confirmed] — open-source search returned none. Analyst note: third-party compatible optical transceivers (AddOn/ProLabs class) are sometimes flagged by Cisco/Juniper/HPE as unsupported non-OEM optics, and supply-chain authenticity (counterfeit optics) is a known industry risk in that segment, but no incident is attributed to 68:50:5D specifically.
- Related vendors
- AddOn Networks, ProLabs, Skylane Optics, Solid Optics (68:50:5D brands); Amphenol Corporation (parent of 68:50:5D); MobileHelp (acquirer of 00:24:40)
- Analyst note
- 68:50:5D MACs would appear on the management interface of active transceiver modules / media converters; 00:24:40 MACs are end-of-life residential health-gateway hardware (>13 years old). Do not display any third-party "registration date" as an IEEE date for either block.