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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