| Business | Phone |
| Baltimore County Chmbr-Cmmrce 7835 Eastpoint Mall # 302, Baltimore 21224 | (410) 282-9100 |
| Baltimore Junior Assn-Commerce 10 E Baltimore St, Baltimore 21202 | (410) 752-1325 |
| Chamber Of Commerce 3 W Baltimore St, Baltimore 21201 | (410) 837-7100 |
| Italy-America Chamber-Commerce 9 W Mulberry St, Baltimore 21201 | (410) 727-8895 |
| Baltimore County Chamber-Cmmrc 102 W Pennsylvania Ave # 101, Baltimore 21204 | (410) 825-6200 |