If you suspend your number for that long you may lose them off the account depending on the account type. May I ask what is going on that you need to suspend the numbers for such a prolonged period of time. I just want to make sure that there are not other potential solutions to resolve the issue you may be facing.
Hey there! Just wanted to check in here and see if you still had questions about seasonally suspending your lines! You might find this document helpful: Account suspensions -- please let us know if you still need help!