If you're not doing so already, please pick numbers that will never end up in use by someone else. E.g. for UK: https://www.ofcom.org.uk/phones-telecoms-and-in

If you're not doing so already, please pick numbers that will never end up in use by someone else. E.g. for UK: https://www.ofcom.org.uk/phones-telecoms-and-internet/information-for-industry/numbering/numbers-for-drama https://www.ofcom.org.uk/phones-telecoms-and-internet/inform... (expand the Notes section)