1977 1980's Present
ARRL LoTW

Logbook of The World Users List

This is my version of HB9BZA's LoTW Users List with the following difference: It adds the date the callsign was last uploaded to LoTW. Only callsigns with confirmed LoTW uploads are added to this list.

Typically, new callsigns are added every day. Existing callsigns are, currently, updated once a month in rotation: the total number of callsigns / number of days in the month are the number of callsigns updated daily.

Last additions to the list: Wednesday, July 30, 2014

There are 75,083 callsigns in the current list.

You can download the data here. Right-click over the link and select Save-As or Save Target As from your browser.

 

 
Callsigns
Only
Callsigns
+
Last Upload Date
Text
MS Access MDB
SQLite3
Ham Radio Deluxe
DM780 XML Alarms
 
DX Monitor
LoTW Update

c:
cd "\Program Files\DX Monitor"
del lotw.txt
wget http://www.wd5eae.org/lotw.txt

 

Please support this project:

  • If any of your LoTW certificate callsign(s) do not appear in this list, please email them to wd5eae @T arrl D0T net
  • Please email a copy of your ARRL LoTW ADIF log. The emailed log will be parsed for new LoTW callsigns and then deleted.
  • If you prefer not to email your entire log, please download your ARRL LoTW ADIF file and this Windows EXE, or this Mac x64 binary, or this Linux binary. These archives each contain a compiled Python script (also available for download below). Put the contained executable file in the same directory as the ADIF file and run the executable. A log file listing only callsigns will be written to the same directory. Please email the resulting log to WD5EAE.
  • If you prefer to run the Python script directly, please download your ARRL LoTW ADIF file and this Python script. Put the ADIF file and the script file in the same directory and run the Python script. Please email the resulting log (listing only callsigns) to WD5EAE. If you need to install Python, you can download Python here.
  • If you prefer Perl, here is a Perl script. Put the ADIF file and the script file in the same directory and run the Perl script. Please email the resulting log (listing only callsigns) to WD5EAE. If you need a Perl installation you can download ActivePerl here.
  • Ham Radio Deluxe 5.x and 6.x users can use Ham Radio Deluxe Utilities version 1.5.0.48 or above. Select the "LoTW Users" tab and then click the "Upload New LoTW User Callsigns" button.

How this data is used:

  • DX Cluster clients such as RXCLUS and DX Monitor use the data to flag LoTW users
  • Reverse Beacon uses the LoTW data to display LoTW users
  • PSK Reporter highlights LoTW users
  • You can personally confirm or look for LoTW users by callsign

If you are an LoTW user, other LoTW users are likely to want to "get you in the log".

Thank You:

Thanks goes to those who have contributed either their ARRL LoTW ADIF files, or a listing of callsigns from their ADIF logs. Thanks also to the HRD Utilities users who have supported the HB9BZA project. If my calculation is correct, since 2008 we have sent over 20,000 new LoTW user callsigns to HB9BZA. Thanks also to Frode LA6VQ for suggesting the current update schedule.

If you are waiting for a confirmation and that user has not uploaded since, say 2003, it is an indication that you might want to contact the station to see if they plan to update their LoTW records. The file also begs for some analysis such as:

 

Recommendation to software developers using the data:

  • If the user has not uploaded to LoTW in over a year, you should use one display color to designate an active LoTW user and another color to to denote an inactive LoTW user.