Which company owns MAC address prefix 30:03:C8?

MAC address prefix 30:03:C8 is registered to CLOUD NETWORK TECHNOLOGY SINGAPORE PTE. LTD. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 30:03:C8 has a network interface built by CLOUD NETWORK TECHNOLOGY SINGAPORE PTE. LTD..

What is the OUI 30:03:C8?

30:03:C8 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to CLOUD NETWORK TECHNOLOGY SINGAPORE PTE. LTD.. It covers every address from 30:03:C8:00:00:00 to 30:03:C8:FF:FF:FF, or 16,777,216 addresses in total. It is also written 30-03-C8.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 30:03:C8:00:00:00 that is 30:03:C8 — 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 CLOUD NETWORK TECHNOLOGY SINGAPORE PTE. LTD. located?

CLOUD NETWORK TECHNOLOGY SINGAPORE PTE. LTD. is listed at B22 Building,NO.51 Tongle Road, Shajing Town, Jiangnan District, Nanning, Guangxi Province, China Nanning Guangxi CN 530007 in the IEEE OUI registry entry for 30:03:C8. This is the address the organization registered with the IEEE, which may differ from its current operating address.

How many MAC prefixes does CLOUD NETWORK TECHNOLOGY SINGAPORE PTE. LTD. own?

CLOUD NETWORK TECHNOLOGY SINGAPORE PTE. LTD. holds 60 OUI prefixes in the IEEE registry, of which 30:03:C8 is one. A device made by CLOUD NETWORK TECHNOLOGY SINGAPORE PTE. LTD. could carry a MAC address from any of them.

CLOUD NETWORK TECHNOLOGY SINGAPORE PTE. LTD.

MAC address prefix 30:03:C8 is registered to CLOUD NETWORK TECHNOLOGY SINGAPORE PTE. LTD. in the IEEE OUI registry. Any device whose MAC address begins with 30:03:C8 has a network interface built by CLOUD NETWORK TECHNOLOGY SINGAPORE PTE. LTD.. 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 30:03:C8:00:00:00 to 30:03:C8:FF:FF:FF.

OUI prefix: 30:03:C8
Hyphen form: 30-03-C8
MAC range: 30:03:C8:00:00:00 – 30:03:C8:FF:FF:FF
Addresses in block: 16,777,216
Organization: CLOUD NETWORK TECHNOLOGY SINGAPORE PTE. LTD.
Address: B22 Building,NO.51 Tongle Road, Shajing Town, Jiangnan District, Nanning, Guangxi Province, China Nanning Guangxi CN 530007
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.

Other prefixes from CLOUD NETWORK TECHNOLOGY SINGAPORE PTE. LTD.

CLOUD NETWORK TECHNOLOGY SINGAPORE PTE. LTD. holds 60 OUI prefixes in total. A device with this exact prefix could just as well carry any of these:

Assignment history (1)

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

2026-07-17Assigned to "CLOUD NETWORK TECHNOLOGY SINGAPORE PTE. LTD."

Nearby in the registry

The prefixes assigned immediately before and after 30:03:C8:

FAQ

Which company owns MAC address prefix 30:03:C8?: MAC address prefix 30:03:C8 is registered to CLOUD NETWORK TECHNOLOGY SINGAPORE PTE. LTD. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 30:03:C8 has a network interface built by CLOUD NETWORK TECHNOLOGY SINGAPORE PTE. LTD..
What is the OUI 30:03:C8?: 30:03:C8 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to CLOUD NETWORK TECHNOLOGY SINGAPORE PTE. LTD.. It covers every address from 30:03:C8:00:00:00 to 30:03:C8:FF:FF:FF, or 16,777,216 addresses in total. It is also written 30-03-C8.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 30:03:C8:00:00:00 that is 30:03:C8 — 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 CLOUD NETWORK TECHNOLOGY SINGAPORE PTE. LTD. located?: CLOUD NETWORK TECHNOLOGY SINGAPORE PTE. LTD. is listed at B22 Building,NO.51 Tongle Road, Shajing Town, Jiangnan District, Nanning, Guangxi Province, China Nanning Guangxi CN 530007 in the IEEE OUI registry entry for 30:03:C8. This is the address the organization registered with the IEEE, which may differ from its current operating address.
How many MAC prefixes does CLOUD NETWORK TECHNOLOGY SINGAPORE PTE. LTD. own?: CLOUD NETWORK TECHNOLOGY SINGAPORE PTE. LTD. holds 60 OUI prefixes in the IEEE registry, of which 30:03:C8 is one. A device made by CLOUD NETWORK TECHNOLOGY SINGAPORE PTE. LTD. could carry a MAC address from any of them.