esn.net
Buying a letter string with existing currency is different from buying a blank one. You’re not paying for three characters, you’re paying for three characters that several industries already read correctly.
ESN is the electronic serial number in telecoms, the identifier that follows a device through its life. It’s the Emergency Services Network in British public safety. It’s the European Student Network in higher education, and enterprise software used it for years to mean the internal social platform. Any of those readings hands a buyer a defensible position on day one.
The extension deserves its own note. For a company selling connectivity, mesh systems, device management or infrastructure, .net is not a compromise made for budget reasons. It is the correct shelf, and technical buyers read it that way.
Three-character strings across the major extensions form a closed set. This one carries a working acronym as well.
Enquiries welcome.