CIDR Netmask |
Netmask dec |
Netmask hex |
Start |
End |
Start |
End |
Start |
End |
Start |
End |
|---|---|---|---|---|---|---|---|---|---|---|
/16 = 1 x 65536 IP |
255.255.000.0 |
FFFF0000 |
0.0 |
255.255 |
||||||
/17 = 2 x 32768 IP |
255.255.128.0 |
FFFF8000 |
0.0 |
127.255 |
128.0 |
255.255 |
||||
/18 = 4 x 16384 IP |
255.255.192.0 |
FFFFC000 |
0.0 |
63.255 |
64.0 |
127.255 |
128.0 |
191.255 |
192.0 |
255.255 |
/19 = 8 x 08192 IP |
255.255.224.0 |
FFFFE000 |
0.0 |
31.255 |
32.0 |
63.255 |
64.0 |
95.255 |
96.0 |
127.255 |
128.0 |
159.255 |
160.0 |
191.255 |
192.0 |
223.255 |
224.0 |
255.255 |
|||
/20 = 16 x 4096 IP |
255.255.240.0 |
FFFFF000 |
0.0 |
15.255 |
16.0 |
31.255 |
32.0 |
47.255 |
48.0 |
63.255 |
64.0 |
79.255 |
80.0 |
95.255 |
96.0 |
111.255 |
112.0 |
127.255 |
|||
128.0 |
143.255 |
144.0 |
159.255 |
160.0 |
175.255 |
176.0 |
191.255 |
|||
192.0 |
207.255 |
208.0 |
223.255 |
224.0 |
239.255 |
240.0 |
255.255 |
|||
/21 = 32 x 2048 IP |
255.255.248.0 |
FFFFF800 |
0.0 |
7.255 |
8.0 |
15.255 |
16.0 |
23.255 |
24.0 |
31.255 |
32.0 |
39.255 |
40.0 |
47.255 |
48.0 |
55.255 |
56.0 |
63.255 |
|||
64.0 |
71.255 |
72.0 |
79.255 |
80.0 |
87.255 |
88.0 |
95.255 |
|||
96.0 |
103.255 |
104.0 |
111.255 |
112.0 |
119.255 |
120.0 |
127.255 |
|||
128.0 |
135.255 |
136.0 |
143.255 |
144.0 |
151.255 |
152.0 |
159.255 |
|||
160.0 |
167.255 |
168.0 |
175.255 |
176.0 |
183.255 |
184.0 |
191.255 |
|||
192.0 |
199.255 |
200.0 |
207.255 |
208.0 |
215.255 |
216.0 |
223.255 |
|||
224.0 |
231.255 |
232.0 |
239.255 |
240.0 |
247.255 |
248.0 |
255.255 |
|||
/22 = 64 x 1024 IP |
255.255.252.0 |
FFFFFC00 |
0.0 |
3.255 |
4.0 |
7.255 |
8.0 |
11.255 |
12.0 |
15.255 |
16.0 |
19.255 |
20.0 |
23.255 |
24.0 |
27.255 |
28.0 |
31.255 |
|||
32.0 |
35.255 |
36.0 |
39.255 |
40.0 |
43.255 |
44.0 |
47.255 |
|||
48.0 |
51.255 |
52.0 |
55.255 |
56.0 |
59.255 |
60.0 |
63.255 |
|||
64.0 |
67.255 |
68.0 |
71.255 |
72.0 |
75.255 |
76.0 |
79.255 |
|||
80.0 |
83.255 |
84.0 |
87.255 |
88.0 |
91.255 |
92.0 |
95.255 |
|||
96.0 |
99.255 |
100.0 |
103.255 |
104.0 |
107.255 |
108.0 |
111.255 |
|||
112.0 |
115.255 |
116.0 |
119.255 |
120.0 |
123.255 |
124.0 |
127.255 |
|||
128.0 |
131.255 |
132.0 |
135.255 |
136.0 |
139.255 |
140.0 |
143.255 |
|||
144.0 |
147.255 |
148.0 |
151.255 |
152.0 |
155.255 |
156.0 |
159.255 |
|||
160.0 |
163.255 |
164.0 |
167.255 |
168.0 |
171.255 |
172.0 |
175.255 |
|||
176.0 |
179.255 |
180.0 |
183.255 |
184.0 |
187.255 |
188.0 |
191.255 |
|||
192.0 |
195.255 |
196.0 |
199.255 |
200.0 |
203.255 |
204.0 |
207.255 |
|||
208.0 |
211.255 |
212.0 |
215.255 |
216.0 |
219.255 |
220.0 |
223.255 |
|||
224.0 |
227.255 |
228.0 |
231.255 |
232.0 |
235.255 |
236.0 |
239.255 |
|||
240.0 |
243.255 |
244.0 |
247.255 |
248.0 |
251.255 |
252.0 |
255.255 |
|||
Reserved Network Ranges
127.0.0.0/8 |
Loopback | the entire class A beginning with 127. |
|
Private IP address space is defined in RFC1918: |
||
10.0.0.0/8 |
Private | the entire class A beginning with 10. |
172.16.0.0/12 |
Private | 16 contiguos Class B, from 172.16.0.0/16 through 172.31.0.0/16 |
192.168.0.0/16 |
Private | 256 contiguos Class C, from 192.168.0.0/24 through 192.168.255.0/24 |
original code: ©2005 by Marco Balestra
The IP Netmask Calculator
| IP Address: |
| Netmask: |
| IP address (classic): | |
| IP address (cisco): | |
| IP value (binary): | |
| Netmask (binary): | |
| Network: | |
| Total available IP: | |
| Network address: | |
| Broadcast address: |