 SPRINGFIELD, Va.--BUSINESS WIRE--Spok Holdings, Inc. NASDAQ: SPOK, a global leader in healthcare communications, today announced it will report operating results for the 2020 fourth-quarter ended December 31, 2020 on Wednesday, February 17, 2021 after market close, at approximately 4:30 p.m. Eastern Time ET. In addition, the Company plans to host a conference call for investors to discuss its 2020 fourth-quarter and full-year results at 10:00 a.m. ET on Thursday, February 18, 2021. Dial-i 