| Business | Phone |
| Aipt 10400 Little Patuxent Pkwy, Columbia 21044 | (410) 997-2200 |
| American Dance Therapy Assn 2000 Century Plz, Columbia 21044 | (410) 997-4040 |
| American Heart Assn 5575 Sterrett Pl, Columbia 21044 | (410) 997-9153 |
| American Medical Directors 10480 Little Patuxent Pkwy, Columbia 21044 | (410) 995-1240 |
| American Society Breast Surgns 10440 Little Patuxten Pkwy#810, Columbia 21044 | (301) 362-1722 |
| Association For Retarded 10750 Little Patuxent Pkwy, Columbia 21044 | (410) 995-0308 |
| Center For Community Health 10805 Hickory Ridge Rd, Columbia 21044 | (410) 730-7850 |
| Child Health Foundation 10630 Little Patuxent Pkwy, Columbia 21044 | (301) 596-4514 |
| Coalition Of Geriatric Svc Columbia 21044 | (410) 997-0610 |
| Columbia Association 8711 Robert Fulton Dr, Columbia 21046 | (410) 872-0359 |
| Columbia Association 9430 Gerwig Ln, Columbia 21046 | (410) 290-8973 |
| Columbia Association 9450 Gerwig Ln, Columbia 21046 | (410) 312-6330 |
| Columbia Tennis Club Po Box 85, Columbia 21045 | (443) 629-7430 |
| Columbia Triathlon Assn 9005 Red Branch Rd, Columbia 21045 | (410) 964-1246 |
| Community Services Benefits 6750 Alexander Bell Dr, Columbia 21046 | (410) 290-2909 |
| Corcoran Unit Owners Assn 5139 Harpers Farm Rd, Columbia 21044 | (301) 596-5667 |
| Correctional Education Assn Columbia 21044 | (410) 730-4881 |
| Electric Power Research Inst Columbia 21044 | (410) 740-3455 |
| Greenleaf Community Assn Columbia 21046 | (410) 381-1455 |
| Harper's Choice Village Cmnty 5440 Old Tucker Row, Columbia 21044 | (410) 730-3888 |
| Hickory Ridge Village-Hawthorn 6175 Sunny Spg, Columbia 21044 | (410) 730-7327 |
| Howard County Youth Hockey Clb 5876 Thunder Hill Rd, Columbia 21045 | (410) 730-6838 |
| Intersocietal Commission Inc 8840 Stanford Blvd # 4900, Columbia 21045 | (410) 872-0100 |
| League Of Women Voters 8950 Route 108, Columbia 21045 | (410) 730-0142 |
| Marine Technology Society 5565 Sterrett Pl, Columbia 21044 | (410) 884-5330 |
| Maryland Association Of Cpa's 10280 Old Columbia Rd, Columbia 21046 | (410) 381-5660 |
| Maryland Occupational Therapy Columbia 21046 | (410) 290-3283 |
| Md Coalition-Childrens Mental 10632 Little Patuxent Pkwy, Columbia 21044 | (410) 730-8267 |
| Nacm 8815 Centre Park Dr, Columbia 21045 | (410) 740-7200 |
| National Assn Of Credit Mgmt 8840 Columbia 100 Pkwy, Columbia 21045 | (410) 740-5560 |
| National Assoc Iation For Self 8825 Stanford Blvd, Columbia 21045 | (410) 872-0090 |
| National Association 9881 Brokenland Pkwy, Columbia 21046 | (410) 290-5410 |
| National Association-Catering 9881 Brokenland Pkwy # 101, Columbia 21046 | (410) 997-9055 |
| National Shoe Retailer Assn 7150 Columbia Gateway Dr, Columbia 21046 | (410) 381-8282 |
| Pta Council Of Howard County 10598 Marble Faun Ln, Columbia 21044 | (410) 740-5153 |
| Town Center Village Assn 5430 Vantage Point Rd, Columbia 21044 | (410) 730-4744 |
| Univs Space Research Assn 10211 Wincopin Cir # 500, Columbia 21044 | (410) 730-2656 |
| Wilde Lake Community Assn 10451 Twin Rivers Rd, Columbia 21044 | (410) 730-2380 |
| Zero Balancing Health Assn 8640 Guilford Rd # 240, Columbia 21046 | (410) 381-8956 |