After speaking to our US service providers, the USA networks are starting to block the use of shared shortcodes in general. Some networks have already stopped provision of new codes and it is expected that they will shortly stop providing all share codes entirely.
The solution to this is to provide any customer wanting to send to the USA with a USA toll-free number. We are currently looking into options to be able to supply this and the commercial implications of this also.
Once we have the solution in place and available, we will be in touch with customers affected by this change.
If you wish to be among the first to take advantage of this, please contact firstname.lastname@example.org
and we'll be in touch as soon as we can.