| Company Name | Phone | Fax | Email | Web | Description |
| Diba Granule Co. | 8713620 | 8713621 | | | |
| Donyaye Granule Co. | 8313826-9 | 8822254 | | | |
| DGB Windsor Co. | 6433698,6433487 | 6426339 | | | |
| Daghayegh Hydrolics Co. | 3337658,3331517 | 3337657 | | | |
| Der Avansian Mold & Plastics Manufacturing Co. | 7355624,7355772 | 7339715 | | | |
| Darakar Co. | (0311)2337702 | (0311)2363533 | | | |
| DPS Manufacturing Co. | (0311)6246845 | (0311)6246845 | | | |
| Dezh Fittings Co. | (0311)2363544 | (0311)2363529 | | | |
| Dehnadi Plastics Manufacturing Co. | (026238)31442 | | | | |
| Daghigh Plastic Co. | 6601064 | @@(0251)2928484 | | | |