| A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |
| Company | Phone Number | Comments |
| Xerox | (800) 822-8221 | Ventura technical support number |
| Xerox | (800) 832-6979 | Main number |
| Xerox | (800) 821-2797 | Laser printer support |
| Xerox | (214) 420-0057 | Diablo printer support |
| XIPHIAS | (213) 821-0074 | Custom-designed digital font libraries |
| Xircom | (800) 638-9283 | Netware |
| Xircom | (800) 775-0400 | Faxback |
