Bitmand

Networking


IPv4 Subnets

Amount of usable addresses in a subnet, is 2 less than total addresses.

CIDR Addresses Netmask Size Comparison Comment
/32 1 255.255.255.255 1/256 of /24 A single host
/31 2 255.255.255.254 1/128 of /24 Useless due to 0 usable addresses
/30 4 255.255.255.252 1/64 of /24  
/29 8 255.255.255.248 1/32 of /24  
/28 16 255.255.255.240 1/16 of /24  
/27 32 255.255.255.224 1/8 of /24  
/26 64 255.255.255.192 1/4 of /24  
/25 128 255.255.255.128 1/2 of /24  
/24 256 255.255.255.0 1 x /24 Class C
/23 512 255.255.254.0 2 x /24  
/22 1.024 255.255.252.0 4 x /24  
/21 2.048 255.255.248.0 8 x /24  
/20 4.096 255.255.240.0 16 x /24  
/19 8.192 255.255.224.0 32 x /24  
/18 16.384 255.255.192.0 64 x /24  
/17 32.768 255.255.128.0 128 x /24  
/16 65.536 255.255.0.0 256 x /24 Class B
/15 131.072 255.254.0.0 2 x /16  
/14 262.144 255.252.0.0 4 x /16  
/13 524.288 255.248.0.0 8 x /16  
/12 1.048.576 255.240.0.0 16 x /16  
/11 2.097.152 255.224.0.0 32 x /16  
/10 4.194.304 255.192.0.0 64 x /16  
/9 8.388.608 255.128.0.0 128 x /16  
/8 16.777.216 255.0.0.0 256 x /16 Class A
/7 33.554.432 254.0.0.0 2 x /8  
/6 67.108.864 252.0.0.0 4 x /8  
/5 268.435.456 248.0.0.0 8 x /8  
/4 268.435.456 240.0.0.0 16 x /8  
/3 536.870.912 224.0.0.0 32 x /8  
/2 1.073.741.824 192.0.0.0 64 x /8  
/1 2.147.483.648 128.0.0.0 128 x /8  
/0 4.294.967.296 0.0.0.0 256 x /8  

IPv4 Subnet Guide

Subnet Network From To Broadcast Total Usable
/24 .0 .1 .254 .255 256 254
Subnet Network From To Broadcast Total Usable
/25 .0 .1 .126 .127 128 126
/25 .128 .129 .254 .255 128 126
Subnet Network From To Broadcast Total Usable
/26 .0 .1 .62 .63 64 62
/26 .64 .65 .126 .127 64 62
/26 .128 .129 .190 .191 64 62
/26 .192 .193 .254 .255 64 62
Subnet Network From To Broadcast Total Usable
/27 .0 .1 .30 .31 32 30
/27 .32 .33 .62 .63 32 30
/27 .64 .65 .94 .95 32 30
/27 .96 .97 .126 .127 32 30
/27 .128 .129 .158 .159 32 30
/27 .160 .161 .190 .191 32 30
/27 .192 .193 .222 .223 32 30
/27 .224 .225 .254 .255 32 30
Subnet Network From To Broadcast Total Usable
/28 .0 .1 .14 .15 16 14
/28 .16 .17 .30 .31 16 14
/28 .32 .33 .46 .47 16 14
/28 .48 .49 .62 .63 16 14
/28 .64 .65 .78 .79 16 14
/28 .80 .81 .94 .95 16 14
/28 .96 .97 .110 .111 16 14
/28 .112 .113 .126 .127 16 14
/28 .128 .129 .142 .143 16 14
/28 .144 .145 .158 .159 16 14
/28 .160 .161 .174 .175 16 14
/28 .176 .177 .190 .191 16 14
/28 .192 .193 .206 .207 16 14
/28 .208 .209 .222 .223 16 14
/28 .224 .225 .238 .239 16 14
/28 .240 .241 .254 .255 16 14
Subnet Network From To Broadcast Total Usable
/29 .0 .1 .6 .7 8 6
/29 .8 .9 .14 .15 8 6
/29 .16 .17 .22 .23 8 6
/29 .24 .25 .30 .31 8 6
/29 .32 .33 .38 .39 8 6
/29 .40 .41 .46 .47 8 6
/29 .48 .49 .54 .55 8 6
/29 .56 .57 .62 .63 8 6
/29 .64 .65 .70 .71 8 6
/29 .72 .73 .78 .79 8 6
/29 .80 .81 .86 .87 8 6
/29 .88 .89 .94 .95 8 6
/29 .96 .97 .102 .103 8 6
/29 .104 .105 .110 .111 8 6
/29 .112 .113 .118 .119 8 6
/29 .120 .121 .126 .127 8 6
/29 .128 .129 .134 .135 8 6
/29 .136 .137 .142 .143 8 6
/29 .144 .145 .150 .151 8 6
/29 .152 .153 .158 .159 8 6
/29 .160 .161 .166 .167 8 6
/29 .168 .169 .174 .175 8 6
/29 .176 .177 .182 .183 8 6
/29 .184 .185 .190 .191 8 6
/29 .192 .193 .198 .199 8 6
/29 .200 .201 .206 .207 8 6
/29 .208 .209 .214 .215 8 6
/29 .216 .217 .222 .223 8 6
/29 .224 .225 .230 .231 8 6
/29 .232 .233 .238 .239 8 6
/29 .240 .241 .246 .247 8 6
/29 .248 .249 .254 .255 8 6
Subnet Network From To Broadcast Total Usable
/30 .0 .1 .2 .3 4 2
/30 .4 .5 .6 .7 4 2
/30 .8 .9 .10 .11 4 2
/30 .12 .13 .14 .15 4 2
/30 .16 .17 .18 .19 4 2
/30 .20 .21 .22 .23 4 2
/30 .24 .25 .26 .27 4 2
/30 .28 .29 .30 .31 4 2
/30 .32 .33 .34 .35 4 2
/30 .36 .37 .38 .39 4 2
/30 .40 .41 .42 .43 4 2
/30 .44 .45 .46 .47 4 2
/30 .48 .49 .50 .51 4 2
/30 .52 .53 .54 .55 4 2
/30 .56 .57 .58 .59 4 2
/30 .60 .61 .62 .63 4 2
/30 .64 .65 .66 .67 4 2
/30 .68 .69 .70 .71 4 2
/30 .72 .73 .74 .75 4 2
/30 .76 .77 .78 .79 4 2
/30 .80 .81 .82 .83 4 2
/30 .84 .85 .86 .87 4 2
/30 .88 .89 .90 .91 4 2
/30 .92 .93 .94 .95 4 2
/30 .96 .97 .98 .99 4 2
/30 .100 .101 .102 .103 4 2
/30 .104 .105 .106 .107 4 2
/30 .108 .109 .110 .111 4 2
/30 .112 .113 .114 .115 4 2
/30 .116 .117 .118 .119 4 2
/30 .120 .121 .122 .123 4 2
/30 .124 .125 .126 .127 4 2
/30 .128 .129 .130 .131 4 2
/30 .132 .133 .134 .135 4 2
/30 .136 .137 .138 .139 4 2
/30 .140 .141 .142 .143 4 2
/30 .144 .145 .146 .147 4 2
/30 .148 .149 .150 .151 4 2
/30 .152 .153 .154 .155 4 2
/30 .156 .157 .158 .159 4 2
/30 .160 .161 .162 .163 4 2
/30 .164 .165 .166 .167 4 2
/30 .168 .169 .170 .171 4 2
/30 .172 .173 .174 .175 4 2
/30 .176 .177 .178 .179 4 2
/30 .180 .181 .182 .183 4 2
/30 .184 .185 .186 .187 4 2
/30 .188 .189 .190 .191 4 2
/30 .192 .193 .194 .195 4 2
/30 .196 .197 .198 .199 4 2
/30 .200 .201 .202 .203 4 2
/30 .204 .205 .206 .207 4 2
/30 .208 .209 .210 .211 4 2
/30 .212 .213 .214 .215 4 2
/30 .216 .217 .218 .219 4 2
/30 .220 .221 .222 .223 4 2
/30 .224 .225 .226 .227 4 2
/30 .228 .229 .230 .231 4 2
/30 .232 .233 .234 .235 4 2
/30 .236 .237 .238 .239 4 2
/30 .240 .241 .242 .243 4 2
/30 .244 .245 .246 .247 4 2
/30 .248 .249 .250 .251 4 2
/30 .252 .253 .254 .255 4 2

IPv4 Reserved Networks

Name Network Range IETF RFC
localhost 127.0.0.0/8 127.0.0.0 - 127.255.255.255 RFC5735
Private Network 10.0.0.0/8 10.0.0.0 - 10.255.255.255 RFC1918
Private Network 172.16.0.0/12 172.16.0.0 - 172.31.255.255 RFC1918
Private Network 192.168.0.0/16 192.168.0.0 - 192.168.255.255 RFC1918

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