Here are a few that I have had hits on, but no ID's.
30212 Cobb Fire Block
30221 Cobb Fire Block
30410 Cobb Police Block
30605 Cobb Government Block
30611 Cobb Government Block
30612 Cobb Government Block
30613 Cobb Government Block
30622 Cobb Government Block
30623 Cobb Government Block
30707 Marietta Police Block
30712 Marietta Police Block
30845 Cobb Cities Block
30880 Smyrna Police/Fire Block
30887 Smyrna Police/Fire Block
30907 Southern Poly Private???
31008 Cobb Water Block
31024 Cobb Water Block
31109 Unknown Block
31149 Unknown Block
31159 Unknown Block
31169 Unknown Block
31179 Unknown Block
31205 Unknown Block
31301 Douglasville Block
31319 Douglasville Block
31339 Douglasville Block
31429 UASI Block
31449 UASI Block
31609 Unknown Block
31629 Unknown Block