Search any phone number worldwide and block unwanted spam calls. Sync.ME has a dedicated self-service opt-out page at https://sync.me/unsubscribe where you submit your phone number/details to remove your listing from its caller-ID and reverse-lookup directory; you can also email privacy@sync.me to delete your account or data. Important caveat: the policy states the same information may be re-uploaded by other users syncing their phonebooks or collected again from other sources, so it is worth re-checking your number periodically after opting out.