小廷的部落格

Class B Subnet Blocks

 /20 -- 16*/24 Subnets 

Network #	IP Range	Broadcast
.0.0	.0.1-.15.254	.15.255
.16.0	.16.1-.31.254	.31.255
.32.0	.32.1-.47.254	.47.255
.48.0	.48.1-.63.254	.63.255
.64.0	.64.1-.79.254	.79.255
.80.0	.80.1-.95.254	.95.255
.96.0	.96.1-.111.254	.111.255
.112.0	.112.1-.127.254	.127.255
.128.0	.128.1-.143.254	.143.255
.144.0	.144.1-.159.254	.159.255
.160.0	.160.1-.175.254	.175.255
.176.0	.176.1-.191.254	.191.255
.192.0	.192.1-.207.254	.207.255
.208.0	.208.1-.223.254	.223.255
.224.0	.224.1-.239.254	.239.255
.240.0	.240.1-255.254	.255.255

 /22 -- 64*/24 Subnets 

Network #	IP Range	Broadcast
.0.0	.0.1-.3.254	.3.255
.4.0	.4.1-.7.254	.7.255
.8.0	.8.1-.11.254	.11.255
.12.0	.12.1-.15.254	.15.255
.16.0	.16.1-.19.254	.19.255
.20.0	.20.1-.23.254	.23.255
.24.0	.24.1-.27.254	.27.255
.28.0	.28.1-.31.254	.31.255
.32.0	.32.1-.35.254	.35.255
.36.0	.36.1-.39.254	.39.255
.40.0	.40.1-.43.254	.43.255
.44.0	.44.1-.47.254	.47.255
.48.0	.48.1-.51.254	.51.255
.52.0	.52.1-.55.254	.55.255
.56.0	.56.1-.59.254	.59.255
.60.0	.60.1-.63.254	.63.255
.64.0	.64.1-.67.254	.67.255
.68.0	.68.1-.71.254	.71.255
.72.0	.72.1-.75.254	.75.255
.76.0	.76.1-.79.254	.79.255
.80.0	.80.1-.83.254	.83.255
.84.0	.84.1-.87.254	.87.255
.88.0	.88.1-.91.254	.91.255
.92.0	.92.1-.95.254	.95.255
.96.0	.96.1-.99.254	.99.255
.100.0	.100.1-.103.254	.103.255
.104.0	.104.1-.107.254	.107.255
.108.0	.108.1-.111.254	.111.255
.112.0	.112.1-.115.254	.115.255
.116.0	.116.1-.119.254	.119.255
.120.0	.120.1-.123.254	.123.255
.124.0	.124.1-.127.254	.127.255
.128.0	.128.1-.131.254	.131.255
.132.0	.132.1-.135.254	.135.255
.136.0	.136.1-.139.254	.139.255
.140.0	.140.1-.143.254	.143.255
.144.0	.144.1-.147.254	.147.255
.148.0	.148.1-.151.254	.151.255
.152.0	.152.1-.155.254	.155.255
.156.0	.156.1-.159.254	.159.255
.160.0	.160.1-.163.254	.163.255
.164.0	.164.1-.167.254	.167.255
.168.0	.168.1-.171.254	.171.255
.172.0	.172.1-.175.254	.175.255
.176.0	.176.1-.179.254	.179.255
.180.0	.180.1-.183.254	.183.255
.184.0	.184.1-.187.254	.187.255
.188.0	.188.1-.191.254	.191.255
.192.0	.192.1-.195.254	.195.255
.196.0	.196.1-.199.254	.199.255
.200.0	.200.1-.203.254	.203.255
.204.0	.204.1-.207.254	.207.255
.208.0	.208.1-.211.254	.211.255
.212.0	.212.1-.215.254	.215.255
.216.0	.216.1-.219.254	.219.255
.220.0	.220.1-.223.254	.223.255
.224.0	.224.1-.227.254	.227.255
.228.0	.228.1-.231.254	.231.255
.232.0	.232.1-.235.254	.235.255
.236.0	.236.1-.239.254	.239.255
.240.0	.240.1-.243.254	.243.255
.244.0	.244.1-.247.254	.247.255
.248.0	.248.1-.251.254	.251.255
.252.0	.252.1-.255.254	.255.255

Class C Subnet Blocks

 /25 -- 2 Subnets -- 128 IP Addresses/Subnet

Network #	IP Range	Broadcast
.0	.1-.126	.127
.128	.129-.254	.255

 

 /26 -- 4 Subnets -- 64 IP Addresses/Subnet

Network #	IP Range	Broadcast
.0	.1-.62	.63
.64	.65-.126	.127
.128	.129-.190	.191
.192	.193-.254	.255

 

 /27 -- 8 Subnets -- 32 IP Addresses/Subnet

Network #	IP Range	Broadcast
.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

 

 /28 -- 16 Subnets -- 16 IP Addresses/Subnet

Network #	IP Range	Broadcast
.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

 

 /29 -- 32 Subnets -- 8 IP Addresses/Subnet

Network #	IP Range	Broadcast
.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

 

 /30 -- 64 Subnets -- 4 IP Addresses/Subnet

Network #	IP Range	Broadcast
.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

 

Prefix	IP Addresses	Hosts	Netmask	Amount of a Class C
/30	4	2	255.255.255.252	1/64
/29	8	6	255.255.255.248	1/32
/28	16	14	255.255.255.240	1/16
/27	32	30	255.255.255.224	1/8
/26	64	62	255.255.255.192	1/4
/25	128	126	255.255.255.128	1/2
/24	256	254	255.255.255.0	1
/23	512	510	255.255.254.0	2
/22	1024	1022	255.255.252.0	4
/21	2048	2046	255.255.248.0	8
/20	4096	4094	255.255.240.0	16
/19	8192	8190	255.255.224.0	32
/18	16384	16382	255.255.192.0	64
/17	32768	32766	255.255.128.0	128
/16	65536	65534	255.255.0.0	256