Global 1 Centre of Activity per band:
15m	21,360 kHz
17m	18,160 kHz
20m	14,300 kHz
Region 1 Centre of Activity per band:
40m	7,060 kHz
80m	3,760 kHz

Note:

¹ For Regions 2 and 3, the Region 1 conference recommends adoption of these frequencies by their next competent conferences in 2006 and 2007 respectively.

For additional details check here and here.