Consider adding Phonerator

[martinvigo]

I while back I did some research on carriers and wrote a tool to look up information on phone numbers, even if you only have a few digits. I think it would be a good addition for the section Telephone numbers, maybe subsection international since it is very related to the phone numbering plans:

• Tool: https://www.martinvigo.com/tools/phonerator
• Info: https://www.martinvigo.com/phonerator-an-advanced-valid-phone-number-generator/