No, MASTER.<b>DTA</b> (not .DTB) is a super-check partial database, with only known callsigns.   HF.DTB was an old prefill (exchange) database that is no longer very useful.<div><br></div><div>See 
<a href="http://docs.win-test.com/wiki/Check_Partial_and_Np1_Files">http://docs.win-test.com/wiki/Check_Partial_and_Np1_Files</a> <br clear="all"><br><div>73,</div><div>Bob, N6TV<br><br><div class="gmail_quote">On Wed, Jul 18, 2012 at 7:13 AM, Hal Offutt <span dir="ltr"><<a href="mailto:hal@japancorporateresearch.com" target="_blank">hal@japancorporateresearch.com</a>></span> wrote:<br>

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<div><font face="Arial">Hello,</font></div>
<div><font face="Arial"></font> </div>
<div><font face="Arial">Is MASTER.DTB a replacement for 
HF.DTB?</font></div>
<div><font face="Arial"></font> </div>
<div><font face="Arial">Thanks!</font></div>
<div><font face="Arial"></font> </div>
<div><font face="Arial">73, Hal W1NN</font></div></div>
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