Topband: 160 Beacons?Resource?

[Don Durk, ka1dwx]

Any details re  the following beacons(?) : 1818.9 3ZCU 0445Z; 3ZDA 1829 0100Z and BHBEE  1831.1 0400Z? Any idea of QTH's or what they are for? Can someone pass along a good resource for beacon or other 'authorized'  international  and domestic  signal sources for 160? I've tried most of the net resources with little luck. Tnx, Don Durk,  ka1dwx/4
gordondurk at knology.net