PC Magazine is owned by Ziff Davis Publishing which is owned by J2 Global. J2 owns the following:
[TABLE="width: 100%, align: center"]
[TR]
[TD]eFax.com[/TD]
[TD][/TD]
[TD]Delaware[/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD]SureTalk.com, Inc.[/TD]
[TD][/TD]
[TD]Delaware[/TD]
[TD][/TD]
[TD]Fax4Free.com[/TD]
[/TR]
[TR]
[TD]ProtoDyne, Inc.[/TD]
[TD][/TD]
[TD]California[/TD]
[TD][/TD]
[TD]Protofax[/TD]
[/TR]
[TR]
[TD]Documagix, Inc.[/TD]
[TD][/TD]
[TD]California[/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD]j2 Latin America, Inc.[/TD]
[TD][/TD]
[TD]Delaware[/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD]dotCOM, Ltd.[/TD]
[TD][/TD]
[TD]Hong Kong[/TD]
[TD][/TD]
[TD]Cyberbox[/TD]
[/TR]
[TR]
[TD]Driverworks.com Development Corporation[/TD]
[/TR]
[/TABLE]