| Business | Phone |
| Baseline Telecom Ws 3223 Arapahoe Ave, Boulder 80303 | (303) 444-1480 |
| Mc Leod Usa 3825 Iris Ave # 100, Boulder 80301 | (303) 544-9000 |
| Qwest Communications 1900 57th Ct N, Boulder 80301 | (303) 441-6211 |
| Searchlogic Inc 1800 30th St # 310, Boulder 80301 | (303) 440-9600 |