Block List Block lists help stop unwanted inbound calls. You can block calls from a specific number as well as the option to block all anonymous calls. Lists operate on a per account basis, as such any entries will apply to all users / trunks. We don't support wildcard entries across ranges, only specific numbers. Entry into a block list can be made one of two ways: Via the block list page available when managing a VoIP account / trunk. Through the inbound itemised calls records page. Next to each call will be an option to add a caller to the block list.->