IP ADDRESSING and SUBNETTING INFORMATION ======================================== Network nomenclature -------------------- 0000-0000 0000-0000 0000-0000 0000-0000 1 2 3 1234 5678 9012 3456 7890 1234 5678 9012 Network Type Addresses Subnet Mask Classical /32 1 255.255.255.255 Individual Address /31 2 255.255.255.254 (useless netmask) /30 4 255.255.255.252 /29 8 255.255.255.248 /28 16 255.255.255.240 /27 32 255.255.255.224 /26 64 255.255.255.192 /25 128 255.255.255.128 /24 256 255.255.255.0 Class C /23 512 255.255.254.0 /22 1,024 255.255.252.0 /21 2,048 255.255.248.0 /20 4,096 255.255.240.0 /19 8,192 255.255.224.0 /18 16,384 255.255.192.0 /17 32,768 255.255.128.0 /16 65,536 255.255.0.0 Class B /15 131,072 255.254.0.0 /14 262,144 255.252.0.0 /13 524,288 255.248.0.0 /12 1,048,576 255.240.0.0 /11 2,097,152 255.224.0.0 /10 4,194,304 255.192.0.0 /9 8,388,608 255.128.0.0 /8 16,777,216 255.0.0.0 Class A /7 33,554,432 254.0.0.0 /6 67,108,864 252.0.0.0 /5 134,217,728 248.0.0.0 /4 268,435,456 240.0.0.0 /3 536,870,912 224.0.0.0 /2 1,073,741,824 192.0.0.0 /1 2,147,483,648 128.0.0.0 /0 4,294,967,296 0.0.0.0 All address space Non-Registered IP Address Space ------------------------------- See RFC 1597 - Address Allocation for Private Internets RFC 1631 - The IP Network Address Translator (NAT) IP address space for private networks: /8 10.0.0.0 - 10.255.255.255 /12 172.16.0.0 - 172.31.255.255 /16 192.168.0.0 - 192.168.255.255 =================== SUBNET TABLE =================== Subnet Mask #Subnets/#Hosts Network# IP-Range Broadcast ============================================================== .0/24 0/254 .0 .1-.254 .255 -------------------------------------------------------------- Subnet Mask #Subnets/#Hosts Network# IP-Range Broadcast ============================================================== .128/25 2/126 .0 .1-.126 .127 .128 .129-.254 .255 -------------------------------------------------------------- Subnet Mask #Subnets/#Hosts Network# IP-Range Broadcast ============================================================== .192/26 4/62 .0 .1-.62 .63 .64 .65-.126 .127 .128 .129-.190 .191 .192 .193-.254 .255 -------------------------------------------------------------- Subnet Mask #Subnets/#Hosts Network# IP-Range Broadcast ============================================================== .224/27 8/30 .0 .1-.30 .31 .32 .33-.62 .63 .64 .65-.94 .95 .96 .97-.126 .127 .128 .129-.158 .159 .160 .161-.190 .191 .192 .193-.222 .223 .224 .225-.254 .255 -------------------------------------------------------------- Subnet Mask #Subnets/#Hosts Network# IP-Range Broadcast ============================================================== .240/28 16/14 .0 .1-.14 .15 .16 .17-.30 .31 .32 .33-.46 .47 .48 .49-.62 .63 .64 .65-.78 .79 .80 .81-.94 .95 .96 .97-.110 .111 .112 .113-.126 .127 .128 .129-.142 .143 .144 .145-.158 .159 .160 .161-.174 .175 .176 .177-.190 .191 .192 .193-.206 .207 .208 .209-.222 .223 .224 .225-.238 .239 .240 .241-.254 .255 -------------------------------------------------------------- Subnet Mask #Subnets/#Hosts Network# IP-Range Broadcast ============================================================== .248/29 32/6 .0 .1-.6 .7 .8 .9-.14 .15 .16 .17-.22 .23 .24 .25-.30 .31 .32 .33-.38 .39 .40 .41-.46 .47 .48 .49-.54 .55 .56 .57-.62 .63 .64 .65-.70 .71 .72 .73-.78 .79 .80 .81-.86 .87 .88 .89-.94 .95 .96 .97-.102 .103 .104 .105-.110 .111 .112 .113-.118 .119 .120 .121-.126 .127 .128 .129-.134 .135 .136 .137-.142 .143 .144 .145-.150 .151 .152 .153-.158 .159 .160 .161-.166 .167 .168 .169-.174 .175 .176 .177-.182 .183 .184 .185-.190 .191 .192 .193-.198 .199 .200 .201-.206 .207 .208 .209-.214 .215 .216 .217-.222 .223 .224 .225-.230 .231 .232 .233-.238 .239 .240 .241-.246 .247 .248 .249-.254 .255 -------------------------------------------------------------- Subnet Mask #Subnets/#Hosts Network# IP-Range Broadcast ============================================================== .252/30 64/2 .0 .1-.2 .3 .4 .5-.6 .7 .8 .9-.10 .11 .12 .13-.14 .15 .16 .17-.18 .19 .20 .21-.22 .23 .24 .25-.26 .27 .28 .29-.30 .31 .32 .33-.34 .35 .36 .37-.38 .39 .40 .41-.42 .43 .44 .45-.46 .47 .48 .49-.50 .51 .52 .53-.54 .55 .56 .57-.58 .59 .60 .61-.62 .63 .64 .65-.66 .67 .68 .69-.70 .71 .72 .73-.74 .75 .76 .77-.78 .79 .80 .81-.82 .83 .84 .85-.86 .87 .88 .89-.90 .91 .92 .93-.94 .95 .96 .97-.98 .99 .100 .101-.102 .103 .104 .105-.106 .107 .108 .109-.110 .111 .112 .113-.114 .115 .116 .117-.118 .119 .120 .121-.122 .123 .124 .125-.126 .127 .128 .129-.130 .131 .132 .133-.134 .135 .136 .137-.138 .139 .140 .141-.142 .143 .144 .145-.146 .147 .148 .149-.150 .151 .152 .153-.154 .155 .156 .157-.158 .159 .160 .161-.162 .163 .164 .165-.166 .167 .168 .169-.170 .171 .172 .173-.174 .175 .176 .177-.178 .179 .180 .181-.182 .183 .184 .185-.186 .187 .188 .189-.190 .191 .192 .193-.194 .195 .196 .197-.198 .199 .200 .201-.202 .203 .204 .205-.206 .207 .208 .209-.210 .211 .212 .213-.214 .215 .216 .217-.218 .219 .220 .221-.222 .223 .224 .225-.226 .227 .228 .229-.230 .231 .232 .233-.234 .235 .236 .237-.238 .239 .240 .241-.242 .243 .244 .245-.246 .247 .248 .249-.250 .251 -------------------------------------------------------------- Subnet Mask #Subnets/#Hosts Network# IP-Range Broadcast ==============================================================