| Prefix | Block | Addresses | Country | First registered |
|---|---|---|---|---|
| 00:50:C2:1E:7 | IAB | 4.1 thousand | US | 30 Jul 2008 |
| 00:50:C2:77:A | IAB | 4.1 thousand | US | 30 Jul 2008 |
| 00:50:C2:AA:0 | IAB | 4.1 thousand | US | 19 Apr 2009 |
| 00:50:C2:D4:9 | IAB | 4.1 thousand | US | 24 Oct 2010 |
| 00:50:C2:F6:E | IAB | 4.1 thousand | US | 8 Apr 2012 |
| 40:D8:55:10:7 | IAB | 4.1 thousand | US | 2 Jun 2013 |
| 70:B3:D5:41:4 | MA-S | 4.1 thousand | US | 29 May 2019 |
| 70:B3:D5:70:6 | MA-S | 4.1 thousand | US | 6 May 2018 |
| 70:B3:D5:81:6 | MA-S | 4.1 thousand | US | 30 Oct 2016 |
| 70:B3:D5:E2:3 | MA-S | 4.1 thousand | US | 2 Nov 2014 |
| 8C:1F:64:6D:1 | MA-S | 4.1 thousand | US | 19 Jul 2025 |
Every block registered to Smith Meter, Inc. in the IEEE registries, complete. Free-text search also matches former owners.