AS13 6.3.21.0/24 CIDR and IP Range Summary.ASN: 13 - Headquarters USAISCHost Count: 254Addressable IPs: 256 6.3.21.06.3.21.16.3.21.26.3.21.36.3.21.46.3.21.56.3.21.66.3.21.76.3.21.86.3.21.96.3.21.106.3.21.116.3.21.126.3.21.136.3.21.146.3.21.156.3.21.166.3.21.176.3.21.186.3.21.196.3.21.206.3.21.216.3.21.226.3.21.236.3.21.246.3.21.256.3.21.266.3.21.276.3.21.286.3.21.296.3.21.306.3.21.316.3.21.326.3.21.336.3.21.346.3.21.356.3.21.366.3.21.376.3.21.386.3.21.396.3.21.406.3.21.416.3.21.426.3.21.436.3.21.446.3.21.456.3.21.466.3.21.476.3.21.486.3.21.496.3.21.506.3.21.516.3.21.526.3.21.536.3.21.546.3.21.556.3.21.566.3.21.576.3.21.586.3.21.596.3.21.606.3.21.616.3.21.626.3.21.636.3.21.646.3.21.656.3.21.666.3.21.676.3.21.686.3.21.696.3.21.706.3.21.716.3.21.726.3.21.736.3.21.746.3.21.756.3.21.766.3.21.776.3.21.786.3.21.796.3.21.806.3.21.816.3.21.826.3.21.836.3.21.846.3.21.856.3.21.866.3.21.876.3.21.886.3.21.896.3.21.906.3.21.916.3.21.926.3.21.936.3.21.946.3.21.956.3.21.966.3.21.976.3.21.986.3.21.996.3.21.1006.3.21.1016.3.21.1026.3.21.1036.3.21.1046.3.21.1056.3.21.1066.3.21.1076.3.21.1086.3.21.1096.3.21.1106.3.21.1116.3.21.1126.3.21.1136.3.21.1146.3.21.1156.3.21.1166.3.21.1176.3.21.1186.3.21.1196.3.21.1206.3.21.1216.3.21.1226.3.21.1236.3.21.1246.3.21.1256.3.21.1266.3.21.1276.3.21.1286.3.21.1296.3.21.1306.3.21.1316.3.21.1326.3.21.1336.3.21.1346.3.21.1356.3.21.1366.3.21.1376.3.21.1386.3.21.1396.3.21.1406.3.21.1416.3.21.1426.3.21.1436.3.21.1446.3.21.1456.3.21.1466.3.21.1476.3.21.1486.3.21.1496.3.21.1506.3.21.1516.3.21.1526.3.21.1536.3.21.1546.3.21.1556.3.21.1566.3.21.1576.3.21.1586.3.21.1596.3.21.1606.3.21.1616.3.21.1626.3.21.1636.3.21.1646.3.21.1656.3.21.1666.3.21.1676.3.21.1686.3.21.1696.3.21.1706.3.21.1716.3.21.1726.3.21.1736.3.21.1746.3.21.1756.3.21.1766.3.21.1776.3.21.1786.3.21.1796.3.21.1806.3.21.1816.3.21.1826.3.21.1836.3.21.1846.3.21.1856.3.21.1866.3.21.1876.3.21.1886.3.21.1896.3.21.1906.3.21.1916.3.21.1926.3.21.1936.3.21.1946.3.21.1956.3.21.1966.3.21.1976.3.21.1986.3.21.1996.3.21.2006.3.21.2016.3.21.2026.3.21.2036.3.21.2046.3.21.2056.3.21.2066.3.21.2076.3.21.2086.3.21.2096.3.21.2106.3.21.2116.3.21.2126.3.21.2136.3.21.2146.3.21.2156.3.21.2166.3.21.2176.3.21.2186.3.21.2196.3.21.2206.3.21.2216.3.21.2226.3.21.2236.3.21.2246.3.21.2256.3.21.2266.3.21.2276.3.21.2286.3.21.2296.3.21.2306.3.21.2316.3.21.2326.3.21.2336.3.21.2346.3.21.2356.3.21.2366.3.21.2376.3.21.2386.3.21.2396.3.21.2406.3.21.2416.3.21.2426.3.21.2436.3.21.2446.3.21.2456.3.21.2466.3.21.2476.3.21.2486.3.21.2496.3.21.2506.3.21.2516.3.21.2526.3.21.2536.3.21.2546.3.21.255