This article explains how to disable the inaccurate company search that is signaled by a tilde (~).
Via profiles in UCServer administration
In Profiles in the UCServer Administration under Advanced -> Category Data Sources / Contact Search -> Use Company Search you can deactivate the company search.
Via the registry key on the ProCall client
Or you can create the following registry key on the client:
HKEY_CURRENT_USER\Software\ESTOS\UCServer4\CtiMain\EnableCompanySearch = [REG_DWORD] = 0
This controls whether a company search is started if no exact match is found in the phone number search on call.