| Business | Phone |
| Affordable Telephone Systems 934 S Andreasen Dr # J, Escondido 92029 | (760) 480-9662 |
| Phone Connection 1317 Simpson Way # E, Escondido 92029 | (760) 489-5665 |
| Phone Solutions 961 Vista Ave, Escondido 92026 | (760) 740-0555 |
| Media Edge Technology 1026 Memory Ln, Escondido 92026 | (760) 745-9073 |
| Mercomm Communications 2240 Bear Valley Pkwy, Escondido 92027 | (760) 738-3990 |