(CNN) Rudy Giuliani's phone calls with a number that House investigators say is associated with the White House's budget office may have simply been calls to and from the White House, according to information obtained by CNN.

CNN has learned that the number the House Intelligence Committee's impeachment report said was "associated" with the Office of Management and Budget is a number that could go to multiple officials within the White House complex, including the White House itself. Real Clear Politics was first to report on the phone number issue.

The new details cast doubt on whether Giuliani was talking to the Office of Management and Budget in the spring, a critical time in which the ousted US Ambassador to Ukraine Marie Yovanovitch was facing a barrage of now-discredited rumors that she wasn't loyal enough to the President. The calls, in April 2019, were well before any known action by the White House to hold Ukrainian military aid, raising questions as to whether there were discussions earlier than previously known.

The OMB designation appears again, according to the report, in calls with Giuliani on August 8, when US military aid to Ukraine had already been held back.

The Intelligence Committee's report states that "Giuliani had three phone calls with a number associated with OMB" on April 24. And, the report detailed that in August, Giuliani had a call with a number associated with OMB for 13 minutes.

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