Is there any check for mobile numbers listed on National Do Not Disturb list?

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Yes, once you upload the mobile number database, there is an NDNC check conducted on your list of numbers. For Promo campaign, the numbers that are NDNC enabled (which means the numbers that are listed with NDNC) will be marked at invalid and the rest of the numbers will be picked up for the broadcast at the time of your voice campaign.