AS7018 12.21.53.0/24 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 254Addressable IPs: 256 12.21.53.012.21.53.112.21.53.212.21.53.312.21.53.412.21.53.512.21.53.612.21.53.712.21.53.812.21.53.912.21.53.1012.21.53.1112.21.53.1212.21.53.1312.21.53.1412.21.53.1512.21.53.1612.21.53.1712.21.53.1812.21.53.1912.21.53.2012.21.53.2112.21.53.2212.21.53.2312.21.53.2412.21.53.2512.21.53.2612.21.53.2712.21.53.2812.21.53.2912.21.53.3012.21.53.3112.21.53.3212.21.53.3312.21.53.3412.21.53.3512.21.53.3612.21.53.3712.21.53.3812.21.53.3912.21.53.4012.21.53.4112.21.53.4212.21.53.4312.21.53.4412.21.53.4512.21.53.4612.21.53.4712.21.53.4812.21.53.4912.21.53.5012.21.53.5112.21.53.5212.21.53.5312.21.53.5412.21.53.5512.21.53.5612.21.53.5712.21.53.5812.21.53.5912.21.53.6012.21.53.6112.21.53.6212.21.53.6312.21.53.6412.21.53.6512.21.53.6612.21.53.6712.21.53.6812.21.53.6912.21.53.7012.21.53.7112.21.53.7212.21.53.7312.21.53.7412.21.53.7512.21.53.7612.21.53.7712.21.53.7812.21.53.7912.21.53.8012.21.53.8112.21.53.8212.21.53.8312.21.53.8412.21.53.8512.21.53.8612.21.53.8712.21.53.8812.21.53.8912.21.53.9012.21.53.9112.21.53.9212.21.53.9312.21.53.9412.21.53.9512.21.53.9612.21.53.9712.21.53.9812.21.53.9912.21.53.10012.21.53.10112.21.53.10212.21.53.10312.21.53.10412.21.53.10512.21.53.10612.21.53.10712.21.53.10812.21.53.10912.21.53.11012.21.53.11112.21.53.11212.21.53.11312.21.53.11412.21.53.11512.21.53.11612.21.53.11712.21.53.11812.21.53.11912.21.53.12012.21.53.12112.21.53.12212.21.53.12312.21.53.12412.21.53.12512.21.53.12612.21.53.12712.21.53.12812.21.53.12912.21.53.13012.21.53.13112.21.53.13212.21.53.13312.21.53.13412.21.53.13512.21.53.13612.21.53.13712.21.53.13812.21.53.13912.21.53.14012.21.53.14112.21.53.14212.21.53.14312.21.53.14412.21.53.14512.21.53.14612.21.53.14712.21.53.14812.21.53.14912.21.53.15012.21.53.15112.21.53.15212.21.53.15312.21.53.15412.21.53.15512.21.53.15612.21.53.15712.21.53.15812.21.53.15912.21.53.16012.21.53.16112.21.53.16212.21.53.16312.21.53.16412.21.53.16512.21.53.16612.21.53.16712.21.53.16812.21.53.16912.21.53.17012.21.53.17112.21.53.17212.21.53.17312.21.53.17412.21.53.17512.21.53.17612.21.53.17712.21.53.17812.21.53.17912.21.53.18012.21.53.18112.21.53.18212.21.53.18312.21.53.18412.21.53.18512.21.53.18612.21.53.18712.21.53.18812.21.53.18912.21.53.19012.21.53.19112.21.53.19212.21.53.19312.21.53.19412.21.53.19512.21.53.19612.21.53.19712.21.53.19812.21.53.19912.21.53.20012.21.53.20112.21.53.20212.21.53.20312.21.53.20412.21.53.20512.21.53.20612.21.53.20712.21.53.20812.21.53.20912.21.53.21012.21.53.21112.21.53.21212.21.53.21312.21.53.21412.21.53.21512.21.53.21612.21.53.21712.21.53.21812.21.53.21912.21.53.22012.21.53.22112.21.53.22212.21.53.22312.21.53.22412.21.53.22512.21.53.22612.21.53.22712.21.53.22812.21.53.22912.21.53.23012.21.53.23112.21.53.23212.21.53.23312.21.53.23412.21.53.23512.21.53.23612.21.53.23712.21.53.23812.21.53.23912.21.53.24012.21.53.24112.21.53.24212.21.53.24312.21.53.24412.21.53.24512.21.53.24612.21.53.24712.21.53.24812.21.53.24912.21.53.25012.21.53.25112.21.53.25212.21.53.25312.21.53.25412.21.53.255