AS7018 12.53.21.0/24 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 254Addressable IPs: 256 12.53.21.012.53.21.112.53.21.212.53.21.312.53.21.412.53.21.512.53.21.612.53.21.712.53.21.812.53.21.912.53.21.1012.53.21.1112.53.21.1212.53.21.1312.53.21.1412.53.21.1512.53.21.1612.53.21.1712.53.21.1812.53.21.1912.53.21.2012.53.21.2112.53.21.2212.53.21.2312.53.21.2412.53.21.2512.53.21.2612.53.21.2712.53.21.2812.53.21.2912.53.21.3012.53.21.3112.53.21.3212.53.21.3312.53.21.3412.53.21.3512.53.21.3612.53.21.3712.53.21.3812.53.21.3912.53.21.4012.53.21.4112.53.21.4212.53.21.4312.53.21.4412.53.21.4512.53.21.4612.53.21.4712.53.21.4812.53.21.4912.53.21.5012.53.21.5112.53.21.5212.53.21.5312.53.21.5412.53.21.5512.53.21.5612.53.21.5712.53.21.5812.53.21.5912.53.21.6012.53.21.6112.53.21.6212.53.21.6312.53.21.6412.53.21.6512.53.21.6612.53.21.6712.53.21.6812.53.21.6912.53.21.7012.53.21.7112.53.21.7212.53.21.7312.53.21.7412.53.21.7512.53.21.7612.53.21.7712.53.21.7812.53.21.7912.53.21.8012.53.21.8112.53.21.8212.53.21.8312.53.21.8412.53.21.8512.53.21.8612.53.21.8712.53.21.8812.53.21.8912.53.21.9012.53.21.9112.53.21.9212.53.21.9312.53.21.9412.53.21.9512.53.21.9612.53.21.9712.53.21.9812.53.21.9912.53.21.10012.53.21.10112.53.21.10212.53.21.10312.53.21.10412.53.21.10512.53.21.10612.53.21.10712.53.21.10812.53.21.10912.53.21.11012.53.21.11112.53.21.11212.53.21.11312.53.21.11412.53.21.11512.53.21.11612.53.21.11712.53.21.11812.53.21.11912.53.21.12012.53.21.12112.53.21.12212.53.21.12312.53.21.12412.53.21.12512.53.21.12612.53.21.12712.53.21.12812.53.21.12912.53.21.13012.53.21.13112.53.21.13212.53.21.13312.53.21.13412.53.21.13512.53.21.13612.53.21.13712.53.21.13812.53.21.13912.53.21.14012.53.21.14112.53.21.14212.53.21.14312.53.21.14412.53.21.14512.53.21.14612.53.21.14712.53.21.14812.53.21.14912.53.21.15012.53.21.15112.53.21.15212.53.21.15312.53.21.15412.53.21.15512.53.21.15612.53.21.15712.53.21.15812.53.21.15912.53.21.16012.53.21.16112.53.21.16212.53.21.16312.53.21.16412.53.21.16512.53.21.16612.53.21.16712.53.21.16812.53.21.16912.53.21.17012.53.21.17112.53.21.17212.53.21.17312.53.21.17412.53.21.17512.53.21.17612.53.21.17712.53.21.17812.53.21.17912.53.21.18012.53.21.18112.53.21.18212.53.21.18312.53.21.18412.53.21.18512.53.21.18612.53.21.18712.53.21.18812.53.21.18912.53.21.19012.53.21.19112.53.21.19212.53.21.19312.53.21.19412.53.21.19512.53.21.19612.53.21.19712.53.21.19812.53.21.19912.53.21.20012.53.21.20112.53.21.20212.53.21.20312.53.21.20412.53.21.20512.53.21.20612.53.21.20712.53.21.20812.53.21.20912.53.21.21012.53.21.21112.53.21.21212.53.21.21312.53.21.21412.53.21.21512.53.21.21612.53.21.21712.53.21.21812.53.21.21912.53.21.22012.53.21.22112.53.21.22212.53.21.22312.53.21.22412.53.21.22512.53.21.22612.53.21.22712.53.21.22812.53.21.22912.53.21.23012.53.21.23112.53.21.23212.53.21.23312.53.21.23412.53.21.23512.53.21.23612.53.21.23712.53.21.23812.53.21.23912.53.21.24012.53.21.24112.53.21.24212.53.21.24312.53.21.24412.53.21.24512.53.21.24612.53.21.24712.53.21.24812.53.21.24912.53.21.25012.53.21.25112.53.21.25212.53.21.25312.53.21.25412.53.21.255