NETMASK AND SUBNET MASK TABLE

Subnet Mask:       255.255.255.0     Hex Mask:  0xffffff00 Subnet Bits:       24                Host Bits: 8 Number of Subnets: 1                 Hosts per Subnet: 254 Network Address IP Range     Broadcast Address .0              .1-.254         .255


Subnet Mask:       255.255.255.128   Hex Mask:  0xffffff80  Subnet Bits:       25                Host Bits: 7  Number of Subnets: 2                 Hosts per Subnet: 126     Network Address IP Range     Broadcast Address  .0              .1-.126         .127 .128            .129-.254       .255
Subnet Mask:       255.255.255.192   Hex Mask:  0xffffffc0 Subnet Bits:       26                Host Bits: 6  Number of Subnets: 4                 Hosts per Subnet: 62  Network Address IP Range     Broadcast Address .0              .1-.62          .63 .64             .65-.126        .127 .128            .129-.190       .191 .192            .193-.254       .255
Subnet Mask:       255.255.255.224   Hex Mask:  0xffffffe0 Subnet Bits:       27                Host Bits: 5  Number of Subnets: 8                 Hosts per Subnet: 30    Network Address IP Range     Broadcast Address .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:       255.255.255.240   Hex Mask:  0xfffffff0 Subnet Bits:       28                Host Bits: 4  Number of Subnets: 16                Hosts per Subnet: 14   Network Address IP Range     Broadcast Address .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:       255.255.255.248   Hex Mask:  0xfffffff8 Subnet Bits:       29                Host Bits: 3  Number of Subnets: 32                Hosts per Subnet: 6   Network Address IP Range     Broadcast Address .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:       255.255.255.252   Hex Mask:  0xfffffffc Subnet Bits:       30                Host Bits: 2  Number of Subnets: 64                Hosts per Subnet: 2   Network Address IP Range    Broadcast Address .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 .252            .253-.254       .255
Subnet Mask:       255.255.255.255   Hex Mask:  0xffffffff Subnet Bits:       32                Host Bits: 0  Number of Subnets: 255               Hosts per Subnet: 1

Net bits

Subnet mask total-addresses

/20

255.255.240.0

4096

/21

255.255.248.0

2048

/22

255.255.252.0

1024

/23

255.255.254.0

512

/24

255.255.255.0

256

/25

255.255.255.128

128

/26

255.255.255.192

64

/27

255.255.255.224

32

/28

255.255.255.240

16

/29

255.255.255.248

8

/30

255.255.255.252

4