Which company owns MAC address prefix 28:71:84?

MAC address prefix 28:71:84 is registered to Spire Payments in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 28:71:84 has a network interface built by Spire Payments.

What is the OUI 28:71:84?

28:71:84 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Spire Payments. It covers every address from 28:71:84:00:00:00 to 28:71:84:FF:FF:FF, or 16,777,216 addresses in total. It is also written 28-71-84.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 28:71:84:00:00:00 that is 28:71:84 — and look that prefix up in the IEEE OUI registry. If the second-lowest bit of the first octet is set, the address is locally administered (a randomized or private MAC), which belongs to no manufacturer and will not resolve; modern phones and laptops use these by default on each network.

Where is Spire Payments located?

Spire Payments is listed at Units 3 & 6 Milford Trading Estate Salisbury Wiltshire GB SP1 2UD in the IEEE OUI registry entry for 28:71:84. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Spire Payments

MAC address prefix 28:71:84 is registered to Spire Payments in the IEEE OUI registry. Any device whose MAC address begins with 28:71:84 has a network interface built by Spire Payments. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address — it covers every MAC from 28:71:84:00:00:00 to 28:71:84:FF:FF:FF.

OUI prefix: 28:71:84
Hyphen form: 28-71-84
MAC range: 28:71:84:00:00:00 – 28:71:84:FF:FF:FF
Addresses in block: 16,777,216
Organization: Spire Payments
Address: Units 3 & 6 Milford Trading Estate Salisbury Wiltshire GB SP1 2UD
Source: IEEE OUI registry

Have a full MAC address? Look it up— we'll also tell you if it's a randomized (private) address rather than a real manufacturer prefix.

Assignment history (2)

The IEEE registry publishes current state only — this is the change record we've kept since we started tracking it daily.

2016-07-29Assigned to "Spire Payments"
archived source →
2026-07-17Assigned to "Spire Payments"

Nearby in the registry

The prefixes assigned immediately before and after 28:71:84:

FAQ

Which company owns MAC address prefix 28:71:84?: MAC address prefix 28:71:84 is registered to Spire Payments in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 28:71:84 has a network interface built by Spire Payments.
What is the OUI 28:71:84?: 28:71:84 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Spire Payments. It covers every address from 28:71:84:00:00:00 to 28:71:84:FF:FF:FF, or 16,777,216 addresses in total. It is also written 28-71-84.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 28:71:84:00:00:00 that is 28:71:84 — and look that prefix up in the IEEE OUI registry. If the second-lowest bit of the first octet is set, the address is locally administered (a randomized or private MAC), which belongs to no manufacturer and will not resolve; modern phones and laptops use these by default on each network.
Where is Spire Payments located?: Spire Payments is listed at Units 3 & 6 Milford Trading Estate Salisbury Wiltshire GB SP1 2UD in the IEEE OUI registry entry for 28:71:84. This is the address the organization registered with the IEEE, which may differ from its current operating address.