| Business | Phone |
| Alzheimer's Disease Research 22512 Gateway Ctr Dr, Clarksburg 20871 | (301) 948-3244 |
| Clarksburg Town Ctr Comm Ctr 12901 Sugarloaf Chapel Dr, Clarksburg 20871 | (301) 444-8680 |
| Comsat Mobile Comm 22300 Comsat Dr, Clarksburg 20871 | (301) 428-2400 |
| R G Holston Inc 12900 Lewisdale Rd, Clarksburg 20871 | (301) 253-3792 |
| Dirty Dawg 25901 Frederick Rd, Clarksburg 20871 | (301) 874-4955 |
| Pal 13609 Lewisdale Rd, Clarksburg 20871 | (301) 869-8890 |
| Michael Harris Developmnt 12741 Snowden Farm Pkwy, Clarksburg 20871 | (301) 528-7931 |
| Hellman & Hellman 24211 Peach Tree Rd, Clarksburg 20871 | (301) 916-6889 |
| Jackson Associates 22801 Timber Creek Ln, Clarksburg 20871 | (301) 924-7100 |
| Jaco Gateway 270 22513 Gateway Center Dr, Clarksburg 20871 | (301) 528-9952 |