| Business | Phone |
| Advanced Telcom Group 117 W Patrick St, Frederick 21701 | (301) 662-9093 |
| Digital Z Inc 8106 Ashford Ct, Frederick 21702 | (301) 695-2775 |
| Eduro Technologies Inc 41 E All Saints St, Frederick 21701 | (240) 529-2000 |
| Expion 4421 Buckeystown Pike, Frederick 21704 | (240) 350-3483 |
| First Magnitude Intl Frederick 21701 | (301) 695-1285 |
| Innovative Communications 2 E 2nd St, Frederick 21701 | (301) 662-6169 |
| Localnet Corp Frederick 21701 | (301) 631-8158 |
| Tressler Group 120 Record St, Frederick 21701 | (717) 337-0080 |
| Welocalize 241 E 4th St # 207, Frederick 21701 | (301) 668-0330 |
| Xecunet 5744 Industry Ln # R, Frederick 21704 | (301) 682-9972 |