| CV-Helios Network | ||
| CV-observers in March 2017 | 31 | 523 |
| Observer number and name | Country | No. obs. |
| CV-001 KJELL INGE MALDE | NORWAY | 12 |
| CV-010 FRANKY DUBOIS | BELGIUM | 25 |
| CV-019 ELMAR JUNKER | GERMANY | 10 |
| CV-020 MANFRED HOLL | GERMANY | 18 |
| CV-021 HOWARD BARNES | NEW ZEALAND | 12 |
| CV-022 ANDREAS VIERTEL | GERMANY | 12 |
| CV-023 HARTMUT BRETSCHNEIDER | GERMANY | 17 |
| CV-034 VVS BELGIUM | BELGIUM | 28 |
| CV-038 GERMAN MORALES | BOLIVIA | 25 |
| CV-044 GERD SCHROEDER | GERMANY | 18 |
| CV-068 SVEN OVE THIMM | DENMARK | 11 |
| CV-077 ANDREW JOHNSTON | UNITED KINGDOM | 15 |
| CV-080 JAN JANSSENS | BELGIUM | 3 |
| CV-082 PIOTR URBANSKI | POLAND | 20 |
| CV-086 TOS POLAND | POLAND | 31 |
| CV-091 GRZEGORZ DALEK | POLAND | 16 |
| CV-102 PAULO ROBERTO MOSER | BRAZIL | 10 |
| CV-103 OCTAAF STEEN | BELGIUM | 27 |
| CV-104 LIEVE MEEUS | BELGIUM | 7 |
| CV-105 ALEXEY RYBACK | RUSSIA | 10 |
| CV-107 MONTY LEVENTHAL | AUSTRALIA | 12 |
| CV-122 VLASTISLAV FEIK | CZECH REPUBLIC | 21 |
| CV-135 GEMA ARAUJO | SPAIN | 31 |
| CV-136 FAUSTINO GARCIA | SPAIN | 19 |
| CV-139 JAVIER ALONSO | SPAIN | 27 |
| CV-151 JEFFREY CARELS | BELGIUM | 17 |
| CV-171 WALTER JOSE MALUF | BRAZIL | 14 |
| CV-181 ADAM DERDZIKOWSKI | POLAND | 8 |
| CV-202 JORDI ZAMORA | SPAIN | 26 |
| CV-207 ONDREJOV OBS. (AI CAS) | CZECH REPUBLIC | 9 |
| CV-209 CAIO CRESPO MORAES | BRAZIL | 12 |