| Customer Information Centre: | T. +385 1 6184-601 |
| Concluding a Gas Supply Agreement - Companies: | T. +385 1 6437-355 T. +385 1 6437-388 |
| Concluding a Gas Supply Agreement - Households: | T. +385 1 6437-446 T. +385 1 6437-336 T. +385 1 6437-353 |
| Customer complaints with regard to natural gas bills: | F. +385 1 6429-470 |
| Compressed natural gas filling station: | T. +385 1 6437-456 |
| Management Board Office: | T. +385 1 6437-320 F. +385 1 6429-456 |
| Official e-mail address of Gradska plinara Zagreb - Opskrba: | opskrba@gpz-opskrba.hr |
| Customer complaint submission: | prigovori@gpz-opskrba.hr |
| Submission of Agreements and amendments to Agreements for Households: | javnausluga@gpz-opskrba.hr |
| Tenants’ Councils (boiler rooms): | kucni.savjeti@gpz-opskrba.hr |
| Companies (VLP-turbines and institutions) | poduzetnistvo@gpz-opskrba.hr |
| Compressed natural gas filling station: | punionica@gpz-opskrba.hr |
| Marketing: | marketing@gpz-opskrba.hr |
| Gas sale for companies (Gas Supply Agreements): | prodaja@gpz-opskrba.hr prodaja-plina@gpz-opskrba.hr |
| Web pages of Gradska Plinara Zagreb - Opskrba: | web.informacije@gpz-opskrba.hr |
| Submission of PIN: | oib@gpz-opskrba.hr |
| Change of personal information for Households: | promjene.podataka@gpz-opskrba.hr |
