Frederiksen’s office had announced the conversation earlier in the day and also said it took place on Thursday.
Trump announced Tuesday night that he was calling off a state visit to Copenhagen early next month because Frederiksen refused to entertain the sale of Greenland.
Frederiksen told reporters Wednesday she was surprised and considered the cancellation a missed opportunity. Preparations for the two-day visit were “well underway,” she said.
Danes had reacted with a mix of outrage and amusement to news that Trump wanted to discuss purchasing the self-governing country that is part of the kingdom of Denmark.
Frederiksen called the idea of the sale “absurd,” angering Trump.
He said her reaction had been “nasty.”
“I thought it was not a nice statement, the way she blew me off,” Trump told reporters at the White House on Wednesday. “She shouldn’t treat the United States that way.”
Danes have long considered themselves to have a particularly close relationship with the United States. Denmark actively supported the U.S.-led invasion of Iraq beginning in 2003, even as France and Germany refused to do so, and served alongside U.S. forces in Afghanistan.