This program helps you compare your DX4WIN award credits ("flags") with your award records found on the ARRL Logbook of the World (LoTW) web site. Both ARRL DX Century Club ("DXCC") and ARRL VHF/UHF Century Club ("VUCC") checking are supported. Your LoTW award account includes all submissions you have made, either through "traditional" (paper QSL) or "electronic" (LoTW) confirmations.

To read more about DX4WIN Award Tracking, please read this application note:

DXCC Award Tracking in DX4WIN

Although it's written specifically for DXCC, the same concepts also apply to VUCC.

This program is compatible with award listings from DX4WIN 4.07 and later. It should work on any computer running Windows XP or later.

Version 8.0 of the program was released in 2016. Go to the Version History to download the program.


After downloading the installation program, run it. You must install the program into your DX4W### directory, the same directory that contains DX4WIN.EXE. If you do not install the program into the correct directory, it will report an error when you try to run it.

IMPORTANT: If you try to run the program and you see either of these two error messages pop up:

MSVCP140.dll is missing


VCRUNTIME140.dll is missing

then you must install the Microsoft Visual C++ Redistributable for Visual Studio 2015. When prompted, download and install vc_redist.x86.exe (not vc_redist.x64.exe).


This program makes the following assumptions. If any of them are not true, you should not use the program.

The program checks two conditions:

This is to make sure:

Data Collection

Before running the program, you must create the two report files needed by the program, one from DX4WIN and the other from LoTW. The process for generating the DX4WIN Award Listing is fairly similar for both DXCC and VUCC. However, the LoTW report generation is very different.


IMPORTANT (DXCC): If you are creating a report for a single band, make sure only the Band box is checked in the Award group. If you are creating a report for a single mode, make sure only the Mode box is checked in the Award group. If you are creating a report for Mixed DXCC only, make sure only the Mixed box is checked in the Award group. Failure to do this may result in many mismatches for DXCC awards you do no track.

DXCC, in LoTW:


The ARRL does not provide a listing of VUCC credits like it does for DXCC. You have to generate the listing yourself. One way to do this is to download your complete list of LoTW confirmations. However, this results in a large file that will take extra time to download and process by the program. A better way is to download only your VUCC band confirmations. Rick, K1MU has written a handy utility to help you with this. Go to the following URL:

ARRL Logbook of the World Query

You need to fill in the fields to match the VUCC award you are tracking. You must check the two boxes shown:

Otherwise, the program won't be able to match up the credits properly. You must also select a VHF/UHF band:

Finally, don't forget to fill in your LoTW Username at the top of the form. This is the value that you enter into the "Username:" field when logging into LoTW. It's usually your callsign.

Here is an example showing my 6m VUCC award from Colorado starting 1 August 2008:

When you click the Submit button, your web browser will take you to the LoTW web site. After logging in, the download should start automatically. Save the file to the same directory as your DX4WIN VUCC award listing from the previous step.

NOTE: To save time later, bookmark this web page. You will then be able to return directly to it without having to to use the LoTW Query program first.

Running the Program

To run the program, double-click on the program icon.

To see the program version, click on the "AD1C" icon in the upper-left and select "About ..."

To be taken to this web page, click on the "Help" button.

There are three check boxes in the program:

Ignore DX4WIN Submitted
Check this box if you have QSOs marked as Submitted in DX4WIN, but have not submitted these QSOs to the ARRL yet. This is useful for people who mark "new ones" as Submitted in DX4WIN throughout the year, but don't submit them to ARRL until the end of the year.
Treat DX4WIN Submitted as Checked
Check this box if you have received your endorsement back from the ARRL, but have NOT yet changed the award flags in DX4WIN from Submitted to Checked. The default is only to check LoTW status against Checked data in DX4WIN.
Report uses Frequency
Check this box if the "Band" field in your QSO window shows frequency (in MHz) instead of band. This is a setting on the QSO tab of your Preferences, "Show band in MHz". The DXCC listing report you saved will be output with Band or Frequency, depending on the setting of this preference. This is mainly so the comparison program can tell the difference between 10 meters and 10 MHz.

The program will list each mismatch it finds, showing both the LoTW status and the DX4WIN status. The DX4WIN status matches the abbreviations used in the report listing:

*    Checked
S    Submitted
C    Confirmed
M    Mailed
L    Label pending
W    Worked

The LoTW status is either [*] Credited or [ ] Not Credited.

When the program finishes, it will report the number of matches and mismatches for each award. The total number of matches plus mismatches (if any) should equal the total in the "Checked" column in the DX4WIN DXCC or VUCC Summary window for that award. If using the "Treat DX4WIN Submitted as Checked" setting, then the total should match the sum of the totals in the "Checked" and "Submitted" columns in the DX4WIN DXCC or VUCC Summary window for that award.

Version History

To download the installation program, click on the hyperlink containing the version number and date.

Ver. 8.0 - July 2016
Added VUCC
Updated Microsoft compiler (requires download of latest Microsoft run-time library)
Ver. 7.5 - 1 February 2015
Report an error when ARRL DXCC Credit Listing contains a DXCC entity that is not in DX4WIN, due to out-dated DX4WIN country file
Added Legend to display output
Ver. 7.4 - 4 May 2014
Added "Ignore DX4WIN Submitted" check box
Ver. 7.3 - 1 May 2014
Fixed back-to-back compares when first DX4WIN listing included deleted entities
Ver. 7.2 - 30 April 2014
Single-band and single-mode compare works again
Ver. 7.1 - 29 April 2014
Print award summary after compare
Ver. 7.0 - 28 April 2014
Use DXCC QSL Download from LoTW site to compare
Should be immune to DX4WIN country file prefix changes (see 6.3 below, for example)
Real signed Windows installer

Ver. 6.4 - 19 January 2014
Changed compilers from Microsoft Visual Studio 2005 to Visual Studio 2010
Ver 6.3 - 24 September 2013
Glorioso Islands prefix change from FR/G to FT/G
Juan de Nova, Europa prefix change from FR/J to FT/J
Tromelin Island prefix change from FR/T to FT/T
Ver. 6.2 - 12 August 2012
Niue prefix change from ZK2 to E6
Ver. 6.1 - 26 March 2012
If the DX4WIN report did not have deleted entities, Mixed mismatches may not get checked/reported
Ver. 6.0 - 17 March 2012
Better support for single awards, like only Mixed or only 20M
Added check box to select by-band or by-frequency
Ver. 5.0 - 13 March 2012
Updated for DX4WIN.CTY dated 11 March 2012 (and later)

Ver. 4.2 - 11 October 2011
Added support for Republic of South Sudan
Last version that works with DX44WIN.CTY from 15 July 2011 to before (not including) 11 March 2012
Ver. 4.1 - 3 April 2011
ARRL changed HTML for PJ5, SABA & ST EUSTATIUS (fixed)
Ver. 4.0 - 29 March 2011
Added full support for the LoTW Award Credit Matrix that contains the four new PJ entities created 10 October 2010.

Ver. 3.1 - 22 January 2011
Allow IMG and 60m (5 MHz) in DX4WIN DXCC listing
Deleted entities may be included or excluded (previously, they had to be included)
Added mapping of two deleted PJ entities (PJ2/D and PJ7/D) to match the LoTW Award Credit Matrix. The program will now only work properly if DX4WIN is using a country file newer than 10 October 2010. Until the ARRL adds the four new PJ entities to the Award Credit Matrix, you may see these messages in your output:

Can't find LoTW match for PJ2: Curacao in DX4WIN
Can't find LoTW match for PJ4: Bonaire in DX4WIN
Can't find LoTW match for PJ5: St. Eustatius & Saba in DX4WIN
Can't find LoTW match for PJ7: Sint Maarten in DX4WIN

This means that these entities in your DX4WIN DXCC listing can't be found in the Award Credit Listing. Just ignore them for now.
Ver. 3.0 - 14 September 2009
Added support for DX4WIN 8.x

Ver. 2.4 - 11 November 2007
Added backwards compatibility for T9,Z7 prefixes
Ver. 2.3 - 10 November 2007
Prefixes changes for Bosnia, Montenegro
Ver. 2.2 - 1 January 2007
Fixed bug comparing Satellite credits
Ver. 2.1 - 28 December 2006
DX4WIN listing no longer has to include Deleted entities
 Having 70cm band enabled no longer confuses the program
 Multi-page printouts work now, and font is fixed-width
 Can force DX4WIN "submitted" credits to look like "checked"
 Added SAVE button to save the results window to a text file
 Added HELP button to go to the URL above (if your web browser is already open, there may be a problem, it's on my list).
 Fixed a couple of problems introduced by LoTW web page changes