From HLSW Wiki
All HLSW clients cache their location information for about one week so all modifications to the database take about one week to appear in every HLSW client. The cache is stored in the file ipspace.dat in the HLSW installation directory. You can clear the cache by deleting this file when HLSW is closed. Since HLSW v1.2 it is also possible to clear the cache in HLSW (File -> Advanced -> Clear provider cache).
It is also possible to display the location as clickable URL within HLSW e.g. see hlsw://22.214.171.124:27015 . If you're interested in any modifications to the location database (e.g. to display the clan homepage as location) contact us at http://www.hlsw.org/about/contact/ .