| site link | phone | |
| Maqshan Oil & Gas Services | 0 | |
| Mawarid Mining | [email protected] | 24580788 |
| Mazoon Environmental and Technological Services | [email protected] | 24155377 |
| MB Holding Company | [email protected] | 24580580 |
| MB Petroleum Services | [email protected] | 24580000 |
| MedEnergy | 24705830 | |
| Muscat Gases Company | [email protected] | 24446030 |
| National Gas Company | [email protected] | 24446073 |
| Northern Minarals | [email protected] | 24563343 |
| Oman Chlorine | [email protected] | 24695839 |
