AS7018 192.137.21.0/24 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 254Addressable IPs: 256 192.137.21.0192.137.21.1192.137.21.2192.137.21.3192.137.21.4192.137.21.5192.137.21.6192.137.21.7192.137.21.8192.137.21.9192.137.21.10192.137.21.11192.137.21.12192.137.21.13192.137.21.14192.137.21.15192.137.21.16192.137.21.17192.137.21.18192.137.21.19192.137.21.20192.137.21.21192.137.21.22192.137.21.23192.137.21.24192.137.21.25192.137.21.26192.137.21.27192.137.21.28192.137.21.29192.137.21.30192.137.21.31192.137.21.32192.137.21.33192.137.21.34192.137.21.35192.137.21.36192.137.21.37192.137.21.38192.137.21.39192.137.21.40192.137.21.41192.137.21.42192.137.21.43192.137.21.44192.137.21.45192.137.21.46192.137.21.47192.137.21.48192.137.21.49192.137.21.50192.137.21.51192.137.21.52192.137.21.53192.137.21.54192.137.21.55192.137.21.56192.137.21.57192.137.21.58192.137.21.59192.137.21.60192.137.21.61192.137.21.62192.137.21.63192.137.21.64192.137.21.65192.137.21.66192.137.21.67192.137.21.68192.137.21.69192.137.21.70192.137.21.71192.137.21.72192.137.21.73192.137.21.74192.137.21.75192.137.21.76192.137.21.77192.137.21.78192.137.21.79192.137.21.80192.137.21.81192.137.21.82192.137.21.83192.137.21.84192.137.21.85192.137.21.86192.137.21.87192.137.21.88192.137.21.89192.137.21.90192.137.21.91192.137.21.92192.137.21.93192.137.21.94192.137.21.95192.137.21.96192.137.21.97192.137.21.98192.137.21.99192.137.21.100192.137.21.101192.137.21.102192.137.21.103192.137.21.104192.137.21.105192.137.21.106192.137.21.107192.137.21.108192.137.21.109192.137.21.110192.137.21.111192.137.21.112192.137.21.113192.137.21.114192.137.21.115192.137.21.116192.137.21.117192.137.21.118192.137.21.119192.137.21.120192.137.21.121192.137.21.122192.137.21.123192.137.21.124192.137.21.125192.137.21.126192.137.21.127192.137.21.128192.137.21.129192.137.21.130192.137.21.131192.137.21.132192.137.21.133192.137.21.134192.137.21.135192.137.21.136192.137.21.137192.137.21.138192.137.21.139192.137.21.140192.137.21.141192.137.21.142192.137.21.143192.137.21.144192.137.21.145192.137.21.146192.137.21.147192.137.21.148192.137.21.149192.137.21.150192.137.21.151192.137.21.152192.137.21.153192.137.21.154192.137.21.155192.137.21.156192.137.21.157192.137.21.158192.137.21.159192.137.21.160192.137.21.161192.137.21.162192.137.21.163192.137.21.164192.137.21.165192.137.21.166192.137.21.167192.137.21.168192.137.21.169192.137.21.170192.137.21.171192.137.21.172192.137.21.173192.137.21.174192.137.21.175192.137.21.176192.137.21.177192.137.21.178192.137.21.179192.137.21.180192.137.21.181192.137.21.182192.137.21.183192.137.21.184192.137.21.185192.137.21.186192.137.21.187192.137.21.188192.137.21.189192.137.21.190192.137.21.191192.137.21.192192.137.21.193192.137.21.194192.137.21.195192.137.21.196192.137.21.197192.137.21.198192.137.21.199192.137.21.200192.137.21.201192.137.21.202192.137.21.203192.137.21.204192.137.21.205192.137.21.206192.137.21.207192.137.21.208192.137.21.209192.137.21.210192.137.21.211192.137.21.212192.137.21.213192.137.21.214192.137.21.215192.137.21.216192.137.21.217192.137.21.218192.137.21.219192.137.21.220192.137.21.221192.137.21.222192.137.21.223192.137.21.224192.137.21.225192.137.21.226192.137.21.227192.137.21.228192.137.21.229192.137.21.230192.137.21.231192.137.21.232192.137.21.233192.137.21.234192.137.21.235192.137.21.236192.137.21.237192.137.21.238192.137.21.239192.137.21.240192.137.21.241192.137.21.242192.137.21.243192.137.21.244192.137.21.245192.137.21.246192.137.21.247192.137.21.248192.137.21.249192.137.21.250192.137.21.251192.137.21.252192.137.21.253192.137.21.254192.137.21.255