40:D8:55:11:20:00 to 40:D8:55:11:2F:FF
Halliburton - Sperry Drilling Service
Inspect this prefixRegistered address
3000 N. Sam Houston Pkwy E.
Houston Texas 77032
Block details
- Registry
- IAB, Individual Address Block (IAB)
- Prefix
- 40:D8:55:11:2 /36
- Addresses in block
- 4,096
- Decimal range
- 71,297,884,299,264 to 71,297,884,303,359
- Address type
- Unicast, universally administered
What this block covers
The retired predecessor to MA-S, the same size and issued from a handful of IEEE owned prefixes. No new IABs have been issued since 2014, but existing ones remain valid.
Any MAC address between 40:D8:55:11:20:00 and 40:D8:55:11:2F:FF belongs to this assignment. The registrant chooses the remaining 12 bits, so the same prefix can appear on very different products from the same company.