Hi avinashudawant,
Based on my understanding, if your PSTN license is expired, the user couldn’t use the PSTN service any more.
For the telephone number, normally, it will be retained for 30 days after the license expired, if you don’t purchase the license for PSTN service after 30 days, the telephone number will be removed after next 7 days.
Unassigned number of your tenant, it will be expired after validity although you don’t assign it.
Hope this reply is helpful to you.
Regards,
Alice Wang
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