ASCEND COMMUNICATIONS, INC.

ASCEND COMMUNICATIONS, INC. holds 2 OUI prefixes in the IEEE registry. Each prefix is the first three octets of a MAC address and covers a block of 16,777,216 addresses, so devices built by ASCEND COMMUNICATIONS, INC. draw from a pool of about 33,554,432 possible MAC addresses in total.

Registered address: 1701 HARBOR BAY PARKWAY ALAMEDA CA US 94502

All 2 prefixes

• 00:C0:7B00:C0:7B:00:00:00 – 00:C0:7B:FF:FF:FF
• 00:D0:5200:D0:52:00:00:00 – 00:D0:52:FF:FF:FF

Have a full MAC address? Look it up to see which of these prefixes it belongs to — or browse the full manufacturer directory.