• Telspan Inc
  4 Park Plz
• Sky Telecom
  29 Alexandria
• Dmr
  17300 Red Hill Ave # 110
• C2c Exchange
  4 Park Plz
• American Telephone
  7363 E Tierra Buena Lane
• Blue Wave Innovations
  19200 Von Karman Ave # 500
• Atheros Communications Inc
  3 Corporate Park
• A T & T & T Voice
  414 Oak Gln
• A T & T
  4902 Flagstar Cir
• Express Tel
  18301 Von Karman Ave # 470
• Enterprise Communications
  18241 W Mcdurmott # A
• Broadwing Communications
  18300 Von Karman Ave # 910
• Bottomline Communications
  18001 Sky Park Cir # E
• Lycamobile - Irvine
  15333 Culver Drive