It seems that KUAM Isla 63 (630 kHz) in Guam has gone silent as per May 1st 2020.
Fortunately, 567 KHz KGUM (10 kW) Guam is still on air.
https://www.kuam.com/story/42023746/chamoru-radio-trailblazer-isla-63-am-to-cease-broadcasting-on-may-1
https://www.kuam.com/story/11095354/isla63-am-your-island-pride-station
Entries in ICDX-AM groups.io (2020-06-11)