According to the ATF database, there are 9 registered FFLs in Dover, Delaware.
1484 EAST LEBANON ROAD RT 10DOVER, DE, 19901
324 MARTIN STREETDOVER, DE, 19901
1365 N DUPONT HWY STE 6000DOVER, DE, 19901
1048 WYOMING MILL RDDOVER, DE, 19904
1244 FORREST AVEDOVER, DE, 199040000
16 S PRESTWICK CTDOVER, DE, 19904
5105 N DUPONT HWYDOVER, DE, 19901
1175 S GOVERNORS AVEDOVER, DE, 19904
4008 S DUPONT HWY FRONTDOVER, DE, 19901