Domain names have been sold for years.Many domains have been taken .
You can querying the name of your company from domain name registration sites,If it is full you might consider taking it in different extensions or you can bring a prefix to the beginning-end.
You can evaluate options such as your company-ltd.com, yourcompany-abd.com, yourcompany.net.
Name sales sites are make registered the domain name with annual fees of around 15 USD.