| Laboratory | BIPM clock code | Clock maker & type | Comment |
| VSL | 1350179 (stopped) | MICROCHIP 5071A/5071B HIGH PERFORMANCE TUBE. | |
| VSL | 1350456 (stopped) | MICROCHIP 5071A/5071B HIGH PERFORMANCE TUBE. | |
| VSL | 1350548 (stopped) | MICROCHIP 5071A/5071B HIGH PERFORMANCE TUBE. | |
| VSL | 1350731 (stopped) | MICROCHIP 5071A/5071B HIGH PERFORMANCE TUBE. | |
| VSL | 1354466 | MICROCHIP 5071A/5071B HIGH PERFORMANCE TUBE. | |
| VSL | 1355008 | MICROCHIP 5071A/5071B HIGH PERFORMANCE TUBE. | |
| VSL | 1355697 | MICROCHIP 5071A/5071B HIGH PERFORMANCE TUBE. | |
| VSL | 1411040 | T4S iMaser 3000 ACTIVE H-MASER | |
