Elster Solutions, LLC (Honeywell Smart Energy)
Summary
- // what this is
- Elster Solutions is registered to MAC prefix
00:23:9Band 1 more in the IEEE OUI database. When a device's MAC address begins with00:23:9B, that block was registered by Elster Solutions — the OUI identifies the maker of the network hardware, which is not always the brand on the device. Elster Solutions was acquired; the registration remains on record with IEEE. - // analyst note
- The registrant Elster Solutions, LLC is the US electricity-metering affiliate now folded into Honeywell Smart Energy. It is distinct from the German gas-metering Elster (Honeywell Elster / Instromet). The registrant name is not a KEV vendor string in the CISA Known Exploited Vulnerabilities Catalog (catalog 2026.09.27, 1728 entries), which does not establish that the hardware is unaffected. IEEE publishes no registration or assignment date for 00:23:9B or 00:1A:63; no third-party lookup consulted carried one either.
About this vendor.
A MAC address beginning with 00:23:9B or 00:1A:63 identifies hardware registered to Elster Solutions, LLC, the US electricity-metering affiliate now operating as Honeywell Smart Energy. The IEEE registry lists two /24 assignments for this registrant, both associated with the address 208 South Rogers Lane in Raleigh, North Carolina.
Elster Solutions, LLC was a provider of advanced metering infrastructure and smart energy products. The company was acquired by Honeywell, and its operations are now integrated into the Honeywell Smart Energy division. This entity is distinct from the German gas-metering company Elster (Honeywell Elster / Instromet), which handles process instrumentation.
The registrant name is not listed in the CISA Known Exploited Vulnerabilities Catalog as of the 2026.09.27 snapshot. This absence indicates that the vendor string is not associated with known exploited vulnerabilities in that specific catalog, but it does not confirm that the hardware is free from other security issues.
- Device class
- Electric meters and Smart Energy electricity products
- Operator
- Elster Solutions, LLC (now Honeywell Smart Energy)
- Operator
- Elster Solutions, LLC [Confirmed] (the IEEE MA-L registry 00239B)
- Website
- https://www.portal.elstersolutions.com/ [Likely] (https://www.portal.elstersolutions.com/)
- Industry
- Electricity metering / smart energy [Likely] (https://portal.elstersolutions.com/dclf.nsf/Default!OpenPage)
- Org Status
- Acquired by Honeywell [Likely] (https://www.portal.elstersolutions.com/)
- Device Types
- Electric meters, Smart Energy electricity products [Likely] (https://portal.elstersolutions.com/dclf.nsf/Default!OpenPage)
- Security Context
- Not listed in CISA KEV [Confirmed] (the CISA Known Exploited Vulnerabilities catalog, version 2026.09.27)
- Registry
- MA-L [Confirmed] (the IEEE MA-L registry 00239B)