QPSX COMMUNICATIONS, LTD. — MAC Prefix Identification
Summary
- // what this is
- QPSX Communications is registered to MAC prefix
00:00:31and 1 more in the IEEE OUI database. When a device's MAC address begins with00:00:31, that block was registered by QPSX Communications — the OUI identifies the maker of the network hardware, which is not always the brand on the device. - // analyst note
- For 48-bit MAC addresses, both prefixes are 24 bits long, leaving 24 suffix bits and 16,777,216 possible suffix values per prefix. For each exact literal prefix, the first-octet Group (
01) and Local (02) bit positions have calculated value zero. The cited RFC excerpt says prefixes are assigned with the Local bit zero and the Group bit unspecified. A registry assignment match does not establish an individual device, product, deployment, or security state.
About this vendor.
A MAC address beginning with 00:00:31 or 00:A0:9B matches an IEEE MA-L assignment to QPSX COMMUNICATIONS, LTD.; the available evidence does not identify a specific device or product. The assignment identifies the registered organization associated with the prefix, not the maker of a particular device or its current operator.
For 48-bit MAC addresses, each 24-bit prefix leaves 24 bits for suffix values, allowing 16,777,216 possible suffix values per prefix. This is a mathematical address space, not a count of devices, shipments, or addresses in use. The two assignments are distinct; they do not establish a shared /24 base.
For each exact prefix, the first octet is 00, so the Group bit (01) and Local bit (02) positions identified in RFC 7042 both have calculated value zero. The excerpt says OUIs and longer MAC prefixes are assigned with the Local bit zero and the Group bit unspecified. It does not establish the Group-bit assignment rule for these records.
The IEEE records show the country code AU, indicating Australia, but provide no assignment dates. A captured matching address supports a prefix match to this registry record only. It does not establish device type, product, deployment, traffic prevalence, current corporate identity, or security status.
- Matching prefixes
00:00:31and00:A0:9B[Confirmed] — https://standards-oui.ieee.org/oui/oui.csv- Country
- Australia (
AUin the registry address) [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv - Device or product
- Not established by the supplied records [Unknown] — https://standards-oui.ieee.org/oui/oui.csv