AS7018 12.243.21.0/24 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 254Addressable IPs: 256 12.243.21.012.243.21.112.243.21.212.243.21.312.243.21.412.243.21.512.243.21.612.243.21.712.243.21.812.243.21.912.243.21.1012.243.21.1112.243.21.1212.243.21.1312.243.21.1412.243.21.1512.243.21.1612.243.21.1712.243.21.1812.243.21.1912.243.21.2012.243.21.2112.243.21.2212.243.21.2312.243.21.2412.243.21.2512.243.21.2612.243.21.2712.243.21.2812.243.21.2912.243.21.3012.243.21.3112.243.21.3212.243.21.3312.243.21.3412.243.21.3512.243.21.3612.243.21.3712.243.21.3812.243.21.3912.243.21.4012.243.21.4112.243.21.4212.243.21.4312.243.21.4412.243.21.4512.243.21.4612.243.21.4712.243.21.4812.243.21.4912.243.21.5012.243.21.5112.243.21.5212.243.21.5312.243.21.5412.243.21.5512.243.21.5612.243.21.5712.243.21.5812.243.21.5912.243.21.6012.243.21.6112.243.21.6212.243.21.6312.243.21.6412.243.21.6512.243.21.6612.243.21.6712.243.21.6812.243.21.6912.243.21.7012.243.21.7112.243.21.7212.243.21.7312.243.21.7412.243.21.7512.243.21.7612.243.21.7712.243.21.7812.243.21.7912.243.21.8012.243.21.8112.243.21.8212.243.21.8312.243.21.8412.243.21.8512.243.21.8612.243.21.8712.243.21.8812.243.21.8912.243.21.9012.243.21.9112.243.21.9212.243.21.9312.243.21.9412.243.21.9512.243.21.9612.243.21.9712.243.21.9812.243.21.9912.243.21.10012.243.21.10112.243.21.10212.243.21.10312.243.21.10412.243.21.10512.243.21.10612.243.21.10712.243.21.10812.243.21.10912.243.21.11012.243.21.11112.243.21.11212.243.21.11312.243.21.11412.243.21.11512.243.21.11612.243.21.11712.243.21.11812.243.21.11912.243.21.12012.243.21.12112.243.21.12212.243.21.12312.243.21.12412.243.21.12512.243.21.12612.243.21.12712.243.21.12812.243.21.12912.243.21.13012.243.21.13112.243.21.13212.243.21.13312.243.21.13412.243.21.13512.243.21.13612.243.21.13712.243.21.13812.243.21.13912.243.21.14012.243.21.14112.243.21.14212.243.21.14312.243.21.14412.243.21.14512.243.21.14612.243.21.14712.243.21.14812.243.21.14912.243.21.15012.243.21.15112.243.21.15212.243.21.15312.243.21.15412.243.21.15512.243.21.15612.243.21.15712.243.21.15812.243.21.15912.243.21.16012.243.21.16112.243.21.16212.243.21.16312.243.21.16412.243.21.16512.243.21.16612.243.21.16712.243.21.16812.243.21.16912.243.21.17012.243.21.17112.243.21.17212.243.21.17312.243.21.17412.243.21.17512.243.21.17612.243.21.17712.243.21.17812.243.21.17912.243.21.18012.243.21.18112.243.21.18212.243.21.18312.243.21.18412.243.21.18512.243.21.18612.243.21.18712.243.21.18812.243.21.18912.243.21.19012.243.21.19112.243.21.19212.243.21.19312.243.21.19412.243.21.19512.243.21.19612.243.21.19712.243.21.19812.243.21.19912.243.21.20012.243.21.20112.243.21.20212.243.21.20312.243.21.20412.243.21.20512.243.21.20612.243.21.20712.243.21.20812.243.21.20912.243.21.21012.243.21.21112.243.21.21212.243.21.21312.243.21.21412.243.21.21512.243.21.21612.243.21.21712.243.21.21812.243.21.21912.243.21.22012.243.21.22112.243.21.22212.243.21.22312.243.21.22412.243.21.22512.243.21.22612.243.21.22712.243.21.22812.243.21.22912.243.21.23012.243.21.23112.243.21.23212.243.21.23312.243.21.23412.243.21.23512.243.21.23612.243.21.23712.243.21.23812.243.21.23912.243.21.24012.243.21.24112.243.21.24212.243.21.24312.243.21.24412.243.21.24512.243.21.24612.243.21.24712.243.21.24812.243.21.24912.243.21.25012.243.21.25112.243.21.25212.243.21.25312.243.21.25412.243.21.255