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Revenue by Geographic Area
 12 Months Ended
Dec. 31, 2019
Revenue from Contract with Customer [Abstract]  
Revenue by Geographic Area Revenue by Geographic Area
Revenue by geographic area is based on the IP address or the mailing address at the time of registration. The following table sets forth revenue by geographic area:
 
 
Year Ended December 31,
 
 
2019
 
2018
 
2017
Revenue by geographic area:
 
(In thousands)
United States
 
$
808,857

 
$
484,809

 
$
308,612

International
 
325,611

 
165,258

 
90,408

Total
 
$
1,134,468

 
$
650,067

 
$
399,020

Percentage of revenue by geographic area:
 
 
 
 
 
 
United States
 
71
%
 
75
%
 
77
%
International
 
29
%
 
25
%
 
23
%

Long-lived assets outside the United States were not significant.