SPOK HOLDINGS, INC


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Subsidiaries
EX-21
2018-03-01
EX-21
2017-03-02
EX-21.1
2016-02-25
EX-21.1
2015-03-05
EX-21.1
2014-03-11
EX-21.1
2013-04-15
EX-21
2012-07-31
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