| 681 | Atlantis Computers | http://www.atlantiscomputers.hr |
| 682 | Atlantis Travel | http://www.atlantis-travel.hr |
| 683 | Atlantska plovidba d.d. | http://www.atlant.hr |
| 684 | Atlas - Turistička agencija | http://www.atlas-croatia.com |
| 685 | Atlas Airtours d.o.o. | http://www.atlasairtours.hr |
| 686 | ATM d.o.o. | http://www.atmauto.net |
| 687 | ATO Inženjering d.o.o. | http://www.ato.hr |
| 688 | Atom Modus d.o.o. | http://www.atom-modus.hr |
| 689 | Atracta d.o.o. | http://www.atracta.hr |
| 690 | ATTOS d.o.o. | http://www.attos.hr |
| 691 | AU Vidulini | http://www.vidulini-astro.hr |
| 692 | Auctor d.o.o. | http://www.auctor.hr |
| 693 | AUDIO SAN d.o.o. | http://www.audiodream.hr |
| 694 | Audio Usluge Sonarscope | http://www.sonarscope.hr |
| 695 | Audio-Video | http://www.audio-video.com.hr |
| 696 | Aurel d.o.o. | http://www.aurel.hr |
| 697 | Aurelis d.o.o. | http://www.aurelis.hr |
| 698 | Aurora klub | http://www.auroraclub.hr |
| 699 | Aurora Maris d.o.o | http://www.auroramaris.com |
| 700 | Aurora Tours | http://www.auroratours.hr |