Get Started

  • Instructions

    Use the following instructions to set up your LOTW account, brought to you by ARRL.

  • Step 1 - Download and install the software


    Logbook of the World uses a free software called TQSL.  (Latest version 2.0)

    TQSL works with MS Windows;  there are versions for Mac OS X and Linux.

    View illustrated instructions to download and install TQSL software.


    If you are using anti-spyware programs such as Bit Defender you must configure your software to allow TQSL to run.


    Download TQSL software for Microsoft Windows

    Trusted QSL software is compatible with all versions of the Windows operating systems that Microsoft is currently supporting.


    Download TQSL software for Mac OS X

    Universal binary for PPC and Intel processors; OS X versions 10.4 and later.


    Linux users can build the software from the source code for the tqsllib library and the TQSL applications. (ARRL does not maintain packages for the plethora of Linux distributions. For assistance with obtaining a packaged version for your Linux distribution, contact your distribution's maintainer.)

  • Step 2 - Request a certificate for your callsign

    Requesting a certificate is a simple process of entering some basic information such as your call sign, name, address and your e-mail address.
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  • Step 3 - Authenticate your location (USA)

    For radio amateurs in the USA authentication is done with a postcard that is mailed to your address that is in the FCC database.  If this address is not current please visit the FCC ULS website and update your address information.

    You will go to the LoTW web page and enter an eight digit code from the postcard after which the TQ6 file will be e-mailed to the user.

    Go Now

  • Step 3 - Authenticate your location (non-USA)

    Non US stations will have to send a copy of your radio amateur operator permit and a copy of another identification such as a driver's license, passport or utility bill.

    Send to:

    ARRL LoTW Administrator
    225 Main St.
    Newington, CT 06111

    Please, no electronic submissions.  This must be postmarked from your location.


    View the complete list of acceptable documents.
    Go Now

  • Step 4 - Acccept Your Call Sign Certificate (TQ6 file)

    At this point you have received an e-mail from LoTW with your TQ6 file.  This e-mail also contains your username (your call sign) and a password to log onto the LoTW userpage.  This information is in the lower portion of the text in the e-mail message.


    These instructions will show you how to load the TQ6 file and more importantly how to save the certificate.  The TQ6 file by itself is not your complete certificate so please be sure to use the instructions to load and save your certificate.

    Go Now

  • Step 5 - Create a station location

    The station location contains all of the geographic information for your operation.  This includes ITU and CQ zones, grid square, US State and county and IOTA number if you operated from an IOTA island.


    Please be accurate and complete when entering the information in this step because this is how the other station will receive credit for your geographic positions from a QSO with you.
    Go Now

  • Step 6 - Sign Upload Your Log Files via the Internet

    Logbook of the world accepts digitally signed files called Trusted QSL files.  You have already used these types of files in the certificate process - TQ5 and TQ6.


    When you digitally sign an ADIF or Cabrillo log file you are making a new file called a TQ8 file.  The information in this new TQ8 file is much like what is on a QSL card.  Your call sign and DXCC entity is taken from your certificate, the QSO information comes from your ADIF or Cabrillo log file and all the geographic information is in your station location in TQSL.

    TQSL 2.0 allows you to sign and upload the log file to the LoTW system via the internet.


    Some logging programs feature a shortcut for signing and uploading your log.  Check with your logging program developer's page for information on features like this.

    Go Now


  • Secondary Operations

    Things to do after you have your initial Call Sign Certificate.

  • Request Additional Call Sign Certificates

    You may request Call Sign Certificates for other calls that you hold or have held in the past.

    Note: This is not the procedure for club call signs.  If you are the trustee of a club call sign the LoTW account must remain seperated from your personal call sign account.  See the section on Club Call Signs and QSL Managers.
    Go Now

  • New Call Sign - Vanity Call Sign - Changed Call Sign

    If you have received a new vanity call or had your primary call sign changed simply request a certificate for your new call sign. 

    After you upload the certificate request use the username request form to inform the Logbook of The World staff  that you changed your primary call and you would like your LoTW username to be changed as well. 

    You will not wait for a postcard for this action to happen.  You will be notified when the name change has occured.

    Your logon password will not changed.

  • Backing Up and Restoring

    Back up your TQSL Call Sign Certificates, station location information and configuration.  This will enable you to restore your TQSL program after a computer failure.
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  • Moving To A New or Second Computer

    Moving all your call sign certificate and station location files is a simple process that only involves a few clicks of your mouse.
    Go Now

  • Checking for Updates

    TQSL will check for updates each time you open the program but you can initiate the check from the program anytime you like.
    Go Now

  • Renewing Your Call Sign Certificate

    TQSL Call Sign Certificates are valid for three years.  Users will be notified several months prior to a certificate's expiration.  A Call Sign Certificate may be renewed at anytime.

    To check when a certificate expires see the next section "Determining When a Callsign Certificate Will Expire"
    Go Now

  • Determining When a Callsign Certificate Will Expire

  • Fixing A QSO

    If you made a mistake with a QSO follow this link to learn how to correct it.
    Go Now

  • Article for Satellite Operators

    ADIF files to be signed by Trusted QSL must contain basic QSO information - the call, time & date, band & mode.

    Satellite QSOs must also have the propogation mode and satellite name to qualify for a satellite contact.  Most logging programs allow the user to collect this information, however you may find it necessary to edit your ADIF file.  This article by John Barber, N5JB explains editing ADIF files to include satellite names and propagation mode.
    Go Now

  • Digital Modes - JT65, JT9, PSK, RTTY etc.

    Do you operate digital modes such as JT65, JT9, PSK31 RTTY, etc?

    Read this information about logging these modes so that you and the other operators get proper credit for the specialty modes.
    Go Now

Third Party Call Signs

LoTW User Account


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