AS7018 12.129.21.0/24 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 254Addressable IPs: 256 12.129.21.012.129.21.112.129.21.212.129.21.312.129.21.412.129.21.512.129.21.612.129.21.712.129.21.812.129.21.912.129.21.1012.129.21.1112.129.21.1212.129.21.1312.129.21.1412.129.21.1512.129.21.1612.129.21.1712.129.21.1812.129.21.1912.129.21.2012.129.21.2112.129.21.2212.129.21.2312.129.21.2412.129.21.2512.129.21.2612.129.21.2712.129.21.2812.129.21.2912.129.21.3012.129.21.3112.129.21.3212.129.21.3312.129.21.3412.129.21.3512.129.21.3612.129.21.3712.129.21.3812.129.21.3912.129.21.4012.129.21.4112.129.21.4212.129.21.4312.129.21.4412.129.21.4512.129.21.4612.129.21.4712.129.21.4812.129.21.4912.129.21.5012.129.21.5112.129.21.5212.129.21.5312.129.21.5412.129.21.5512.129.21.5612.129.21.5712.129.21.5812.129.21.5912.129.21.6012.129.21.6112.129.21.6212.129.21.6312.129.21.6412.129.21.6512.129.21.6612.129.21.6712.129.21.6812.129.21.6912.129.21.7012.129.21.7112.129.21.7212.129.21.7312.129.21.7412.129.21.7512.129.21.7612.129.21.7712.129.21.7812.129.21.7912.129.21.8012.129.21.8112.129.21.8212.129.21.8312.129.21.8412.129.21.8512.129.21.8612.129.21.8712.129.21.8812.129.21.8912.129.21.9012.129.21.9112.129.21.9212.129.21.9312.129.21.9412.129.21.9512.129.21.9612.129.21.9712.129.21.9812.129.21.9912.129.21.10012.129.21.10112.129.21.10212.129.21.10312.129.21.10412.129.21.10512.129.21.10612.129.21.10712.129.21.10812.129.21.10912.129.21.11012.129.21.11112.129.21.11212.129.21.11312.129.21.11412.129.21.11512.129.21.11612.129.21.11712.129.21.11812.129.21.11912.129.21.12012.129.21.12112.129.21.12212.129.21.12312.129.21.12412.129.21.12512.129.21.12612.129.21.12712.129.21.12812.129.21.12912.129.21.13012.129.21.13112.129.21.13212.129.21.13312.129.21.13412.129.21.13512.129.21.13612.129.21.13712.129.21.13812.129.21.13912.129.21.14012.129.21.14112.129.21.14212.129.21.14312.129.21.14412.129.21.14512.129.21.14612.129.21.14712.129.21.14812.129.21.14912.129.21.15012.129.21.15112.129.21.15212.129.21.15312.129.21.15412.129.21.15512.129.21.15612.129.21.15712.129.21.15812.129.21.15912.129.21.16012.129.21.16112.129.21.16212.129.21.16312.129.21.16412.129.21.16512.129.21.16612.129.21.16712.129.21.16812.129.21.16912.129.21.17012.129.21.17112.129.21.17212.129.21.17312.129.21.17412.129.21.17512.129.21.17612.129.21.17712.129.21.17812.129.21.17912.129.21.18012.129.21.18112.129.21.18212.129.21.18312.129.21.18412.129.21.18512.129.21.18612.129.21.18712.129.21.18812.129.21.18912.129.21.19012.129.21.19112.129.21.19212.129.21.19312.129.21.19412.129.21.19512.129.21.19612.129.21.19712.129.21.19812.129.21.19912.129.21.20012.129.21.20112.129.21.20212.129.21.20312.129.21.20412.129.21.20512.129.21.20612.129.21.20712.129.21.20812.129.21.20912.129.21.21012.129.21.21112.129.21.21212.129.21.21312.129.21.21412.129.21.21512.129.21.21612.129.21.21712.129.21.21812.129.21.21912.129.21.22012.129.21.22112.129.21.22212.129.21.22312.129.21.22412.129.21.22512.129.21.22612.129.21.22712.129.21.22812.129.21.22912.129.21.23012.129.21.23112.129.21.23212.129.21.23312.129.21.23412.129.21.23512.129.21.23612.129.21.23712.129.21.23812.129.21.23912.129.21.24012.129.21.24112.129.21.24212.129.21.24312.129.21.24412.129.21.24512.129.21.24612.129.21.24712.129.21.24812.129.21.24912.129.21.25012.129.21.25112.129.21.25212.129.21.25312.129.21.25412.129.21.255