Their is a hidden manual carrier that can port some numbers to Voip.ms that the usual method “DID Numbers → DID Portability” cannot.
I discovered this by visiting https://voip.ms/features/local-number-portability#search_number_container and entering a number that resulted in reporting the number “can be transferred to our network.”
However, when I visited https://voip.ms/m/lnp_us_avail.php and entered the same number it said “Sorry, this ratecenter is not portable to our network.”
I opened a ticket with support. They said the number cannot be ported to Voip.ms and closed the ticket. After over a month of re-opening and re-closing the ticket, they finally said they can port the number; “We have been advised by one of our carriers that this number is portable to them, if you wish to proceed, please note that this will be handled manually…”
Just wanted to let others know should you run into the same issue.
Thanks!