| Business | Phone |
| Broadwing Corp 7015 Albert Einstein Dr, Columbia 21046 | (443) 259-4000 |
| Fastrends 8910 State Route 108, Columbia 21045 | (410) 740-1145 |
| Genuity Inc 9810 Patuxent Woods Dr, Columbia 21046 | (410) 290-5000 |
| Global Tranquility Online Co 5513 Twin Knolls Rd, Columbia 21045 | (443) 367-0030 |
| M D Connect Internet 9246 Moonfire Pl, Columbia 21045 | (410) 290-8088 |
| Servicebench.Com 8945 Guilford Rd, Columbia 21046 | (410) 290-3674 |
| Web Traffic Columbia 21046 | (410) 309-2771 |