Cal-Comp Electronics & Communications Company Ltd.
MAC address prefix F0:21:9D is registered to Cal-Comp Electronics & Communications Company Ltd. in the IEEE OUI registry. Any device whose MAC address begins with F0:21:9D has a network interface built by Cal-Comp Electronics & Communications Company 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 F0:21:9D:00:00:00 to F0:21:9D:FF:FF:FF.
- OUI prefix
- F0:21:9D
- Hyphen form
- F0-21-9D
- MAC range
- F0:21:9D:00:00:00 – F0:21:9D:FF:FF:FF
- Addresses in block
- 16,777,216
- Organization
- Cal-Comp Electronics & Communications Company Ltd.
- Address
- No.147, Sec. 3, Beishen Rd Shenkeng Dist New Taipei City TW ---
- 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 Cal-Comp Electronics & Communications Company Ltd.
Cal-Comp Electronics & Communications Company Ltd. holds 3 OUI prefixes in total. A device with this exact prefix could just as well carry any of these:
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 "Cal-Comp Electronics & Communications Company Ltd."archived source →
- 2026-07-17Assigned to "Cal-Comp Electronics & Communications Company Ltd."
Nearby in the registry
The prefixes assigned immediately before and after F0:21:9D:
- ORICO Technologies Co., LtdF0:1E:34
- Rentokil InitialF0:1E:AC
- Dell Inc.F0:1F:AF
- Apple, Inc.F0:1F:C7
- Intel CorporateF0:20:FF
- UNIONMAN TECHNOLOGY CO.,LTDF0:21:78
- eero inc.F0:21:E0
- IEEE Registration AuthorityF0:22:1D
- Esan electronic co.F0:22:4E
- SHOWA DENKI CO.,LTD.F0:23:29
- AMPAK Technology,Inc.F0:23:AE
- IEEE Registration AuthorityF0:23:B9
FAQ
- Which company owns MAC address prefix F0:21:9D?
- MAC address prefix F0:21:9D is registered to Cal-Comp Electronics & Communications Company Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with F0:21:9D has a network interface built by Cal-Comp Electronics & Communications Company Ltd..
- What is the OUI F0:21:9D?
- F0:21:9D is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Cal-Comp Electronics & Communications Company Ltd.. It covers every address from F0:21:9D:00:00:00 to F0:21:9D:FF:FF:FF, or 16,777,216 addresses in total. It is also written F0-21-9D.
- How do I find the manufacturer of a MAC address?
- Take the first three octets of the address — in F0:21:9D:00:00:00 that is F0:21:9D — 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 Cal-Comp Electronics & Communications Company Ltd. located?
- Cal-Comp Electronics & Communications Company Ltd. is listed at No.147, Sec. 3, Beishen Rd Shenkeng Dist New Taipei City TW --- in the IEEE OUI registry entry for F0:21:9D. This is the address the organization registered with the IEEE, which may differ from its current operating address.
- How many MAC prefixes does Cal-Comp Electronics & Communications Company Ltd. own?
- Cal-Comp Electronics & Communications Company Ltd. holds 3 OUI prefixes in the IEEE registry, of which F0:21:9D is one. A device made by Cal-Comp Electronics & Communications Company Ltd. could carry a MAC address from any of them.