IPv4 Subnet Calculator

Enter an IP with a CIDR prefix or a subnet mask to see its network, broadcast, host range, and host count. You can also split the network into smaller subnets.

Try:192.168.1.10/24 10.0.0.0/8 172.16.5.4/20 203.0.113.9/29

IPv6 calculator →

private IP (RFC 1918)10.55.0.0/16

network10.55.0.0/16

broadcast10.55.255.255

first host10.55.0.1

last host10.55.255.254

subnet mask255.255.0.0

wildcard0.0.255.255

addresses65,536

usable hosts65,534

classA

ipcalc 10.55.0.0/16

address00001010.00110111.00000000.00000000

subnet mask11111111.11111111.00000000.00000000

network00001010.00110111.00000000.00000000

broadcast00001010.00110111.11111111.11111111

green = network part, grey = host part

hex0x0a370000

decimal171376640

reverse dns0.0.55.10.in-addr.arpa

ipv4-mapped::ffff:a37:0

/16 split into /24 · 256 subnets

close ×

#	network	host range	broadcast
1	10.55.0.0/24	10.55.0.1 – 10.55.0.254	10.55.0.255
2	10.55.1.0/24	10.55.1.1 – 10.55.1.254	10.55.1.255
3	10.55.2.0/24	10.55.2.1 – 10.55.2.254	10.55.2.255
4	10.55.3.0/24	10.55.3.1 – 10.55.3.254	10.55.3.255
5	10.55.4.0/24	10.55.4.1 – 10.55.4.254	10.55.4.255
6	10.55.5.0/24	10.55.5.1 – 10.55.5.254	10.55.5.255
7	10.55.6.0/24	10.55.6.1 – 10.55.6.254	10.55.6.255
8	10.55.7.0/24	10.55.7.1 – 10.55.7.254	10.55.7.255
9	10.55.8.0/24	10.55.8.1 – 10.55.8.254	10.55.8.255
10	10.55.9.0/24	10.55.9.1 – 10.55.9.254	10.55.9.255
11	10.55.10.0/24	10.55.10.1 – 10.55.10.254	10.55.10.255
12	10.55.11.0/24	10.55.11.1 – 10.55.11.254	10.55.11.255
13	10.55.12.0/24	10.55.12.1 – 10.55.12.254	10.55.12.255
14	10.55.13.0/24	10.55.13.1 – 10.55.13.254	10.55.13.255
15	10.55.14.0/24	10.55.14.1 – 10.55.14.254	10.55.14.255
16	10.55.15.0/24	10.55.15.1 – 10.55.15.254	10.55.15.255
17	10.55.16.0/24	10.55.16.1 – 10.55.16.254	10.55.16.255
18	10.55.17.0/24	10.55.17.1 – 10.55.17.254	10.55.17.255
19	10.55.18.0/24	10.55.18.1 – 10.55.18.254	10.55.18.255
20	10.55.19.0/24	10.55.19.1 – 10.55.19.254	10.55.19.255
21	10.55.20.0/24	10.55.20.1 – 10.55.20.254	10.55.20.255
22	10.55.21.0/24	10.55.21.1 – 10.55.21.254	10.55.21.255
23	10.55.22.0/24	10.55.22.1 – 10.55.22.254	10.55.22.255
24	10.55.23.0/24	10.55.23.1 – 10.55.23.254	10.55.23.255
25	10.55.24.0/24	10.55.24.1 – 10.55.24.254	10.55.24.255
26	10.55.25.0/24	10.55.25.1 – 10.55.25.254	10.55.25.255
27	10.55.26.0/24	10.55.26.1 – 10.55.26.254	10.55.26.255
28	10.55.27.0/24	10.55.27.1 – 10.55.27.254	10.55.27.255
29	10.55.28.0/24	10.55.28.1 – 10.55.28.254	10.55.28.255
30	10.55.29.0/24	10.55.29.1 – 10.55.29.254	10.55.29.255
31	10.55.30.0/24	10.55.30.1 – 10.55.30.254	10.55.30.255
32	10.55.31.0/24	10.55.31.1 – 10.55.31.254	10.55.31.255
33	10.55.32.0/24	10.55.32.1 – 10.55.32.254	10.55.32.255
34	10.55.33.0/24	10.55.33.1 – 10.55.33.254	10.55.33.255
35	10.55.34.0/24	10.55.34.1 – 10.55.34.254	10.55.34.255
36	10.55.35.0/24	10.55.35.1 – 10.55.35.254	10.55.35.255
37	10.55.36.0/24	10.55.36.1 – 10.55.36.254	10.55.36.255
38	10.55.37.0/24	10.55.37.1 – 10.55.37.254	10.55.37.255
39	10.55.38.0/24	10.55.38.1 – 10.55.38.254	10.55.38.255
40	10.55.39.0/24	10.55.39.1 – 10.55.39.254	10.55.39.255
41	10.55.40.0/24	10.55.40.1 – 10.55.40.254	10.55.40.255
42	10.55.41.0/24	10.55.41.1 – 10.55.41.254	10.55.41.255
43	10.55.42.0/24	10.55.42.1 – 10.55.42.254	10.55.42.255
44	10.55.43.0/24	10.55.43.1 – 10.55.43.254	10.55.43.255
45	10.55.44.0/24	10.55.44.1 – 10.55.44.254	10.55.44.255
46	10.55.45.0/24	10.55.45.1 – 10.55.45.254	10.55.45.255
47	10.55.46.0/24	10.55.46.1 – 10.55.46.254	10.55.46.255
48	10.55.47.0/24	10.55.47.1 – 10.55.47.254	10.55.47.255
49	10.55.48.0/24	10.55.48.1 – 10.55.48.254	10.55.48.255
50	10.55.49.0/24	10.55.49.1 – 10.55.49.254	10.55.49.255
51	10.55.50.0/24	10.55.50.1 – 10.55.50.254	10.55.50.255
52	10.55.51.0/24	10.55.51.1 – 10.55.51.254	10.55.51.255
53	10.55.52.0/24	10.55.52.1 – 10.55.52.254	10.55.52.255
54	10.55.53.0/24	10.55.53.1 – 10.55.53.254	10.55.53.255
55	10.55.54.0/24	10.55.54.1 – 10.55.54.254	10.55.54.255
56	10.55.55.0/24	10.55.55.1 – 10.55.55.254	10.55.55.255
57	10.55.56.0/24	10.55.56.1 – 10.55.56.254	10.55.56.255
58	10.55.57.0/24	10.55.57.1 – 10.55.57.254	10.55.57.255
59	10.55.58.0/24	10.55.58.1 – 10.55.58.254	10.55.58.255
60	10.55.59.0/24	10.55.59.1 – 10.55.59.254	10.55.59.255
61	10.55.60.0/24	10.55.60.1 – 10.55.60.254	10.55.60.255
62	10.55.61.0/24	10.55.61.1 – 10.55.61.254	10.55.61.255
63	10.55.62.0/24	10.55.62.1 – 10.55.62.254	10.55.62.255
64	10.55.63.0/24	10.55.63.1 – 10.55.63.254	10.55.63.255
65	10.55.64.0/24	10.55.64.1 – 10.55.64.254	10.55.64.255
66	10.55.65.0/24	10.55.65.1 – 10.55.65.254	10.55.65.255
67	10.55.66.0/24	10.55.66.1 – 10.55.66.254	10.55.66.255
68	10.55.67.0/24	10.55.67.1 – 10.55.67.254	10.55.67.255
69	10.55.68.0/24	10.55.68.1 – 10.55.68.254	10.55.68.255
70	10.55.69.0/24	10.55.69.1 – 10.55.69.254	10.55.69.255
71	10.55.70.0/24	10.55.70.1 – 10.55.70.254	10.55.70.255
72	10.55.71.0/24	10.55.71.1 – 10.55.71.254	10.55.71.255
73	10.55.72.0/24	10.55.72.1 – 10.55.72.254	10.55.72.255
74	10.55.73.0/24	10.55.73.1 – 10.55.73.254	10.55.73.255
75	10.55.74.0/24	10.55.74.1 – 10.55.74.254	10.55.74.255
76	10.55.75.0/24	10.55.75.1 – 10.55.75.254	10.55.75.255
77	10.55.76.0/24	10.55.76.1 – 10.55.76.254	10.55.76.255
78	10.55.77.0/24	10.55.77.1 – 10.55.77.254	10.55.77.255
79	10.55.78.0/24	10.55.78.1 – 10.55.78.254	10.55.78.255
80	10.55.79.0/24	10.55.79.1 – 10.55.79.254	10.55.79.255
81	10.55.80.0/24	10.55.80.1 – 10.55.80.254	10.55.80.255
82	10.55.81.0/24	10.55.81.1 – 10.55.81.254	10.55.81.255
83	10.55.82.0/24	10.55.82.1 – 10.55.82.254	10.55.82.255
84	10.55.83.0/24	10.55.83.1 – 10.55.83.254	10.55.83.255
85	10.55.84.0/24	10.55.84.1 – 10.55.84.254	10.55.84.255
86	10.55.85.0/24	10.55.85.1 – 10.55.85.254	10.55.85.255
87	10.55.86.0/24	10.55.86.1 – 10.55.86.254	10.55.86.255
88	10.55.87.0/24	10.55.87.1 – 10.55.87.254	10.55.87.255
89	10.55.88.0/24	10.55.88.1 – 10.55.88.254	10.55.88.255
90	10.55.89.0/24	10.55.89.1 – 10.55.89.254	10.55.89.255
91	10.55.90.0/24	10.55.90.1 – 10.55.90.254	10.55.90.255
92	10.55.91.0/24	10.55.91.1 – 10.55.91.254	10.55.91.255
93	10.55.92.0/24	10.55.92.1 – 10.55.92.254	10.55.92.255
94	10.55.93.0/24	10.55.93.1 – 10.55.93.254	10.55.93.255
95	10.55.94.0/24	10.55.94.1 – 10.55.94.254	10.55.94.255
96	10.55.95.0/24	10.55.95.1 – 10.55.95.254	10.55.95.255
97	10.55.96.0/24	10.55.96.1 – 10.55.96.254	10.55.96.255
98	10.55.97.0/24	10.55.97.1 – 10.55.97.254	10.55.97.255
99	10.55.98.0/24	10.55.98.1 – 10.55.98.254	10.55.98.255
100	10.55.99.0/24	10.55.99.1 – 10.55.99.254	10.55.99.255
101	10.55.100.0/24	10.55.100.1 – 10.55.100.254	10.55.100.255
102	10.55.101.0/24	10.55.101.1 – 10.55.101.254	10.55.101.255
103	10.55.102.0/24	10.55.102.1 – 10.55.102.254	10.55.102.255
104	10.55.103.0/24	10.55.103.1 – 10.55.103.254	10.55.103.255
105	10.55.104.0/24	10.55.104.1 – 10.55.104.254	10.55.104.255
106	10.55.105.0/24	10.55.105.1 – 10.55.105.254	10.55.105.255
107	10.55.106.0/24	10.55.106.1 – 10.55.106.254	10.55.106.255
108	10.55.107.0/24	10.55.107.1 – 10.55.107.254	10.55.107.255
109	10.55.108.0/24	10.55.108.1 – 10.55.108.254	10.55.108.255
110	10.55.109.0/24	10.55.109.1 – 10.55.109.254	10.55.109.255
111	10.55.110.0/24	10.55.110.1 – 10.55.110.254	10.55.110.255
112	10.55.111.0/24	10.55.111.1 – 10.55.111.254	10.55.111.255
113	10.55.112.0/24	10.55.112.1 – 10.55.112.254	10.55.112.255
114	10.55.113.0/24	10.55.113.1 – 10.55.113.254	10.55.113.255
115	10.55.114.0/24	10.55.114.1 – 10.55.114.254	10.55.114.255
116	10.55.115.0/24	10.55.115.1 – 10.55.115.254	10.55.115.255
117	10.55.116.0/24	10.55.116.1 – 10.55.116.254	10.55.116.255
118	10.55.117.0/24	10.55.117.1 – 10.55.117.254	10.55.117.255
119	10.55.118.0/24	10.55.118.1 – 10.55.118.254	10.55.118.255
120	10.55.119.0/24	10.55.119.1 – 10.55.119.254	10.55.119.255
121	10.55.120.0/24	10.55.120.1 – 10.55.120.254	10.55.120.255
122	10.55.121.0/24	10.55.121.1 – 10.55.121.254	10.55.121.255
123	10.55.122.0/24	10.55.122.1 – 10.55.122.254	10.55.122.255
124	10.55.123.0/24	10.55.123.1 – 10.55.123.254	10.55.123.255
125	10.55.124.0/24	10.55.124.1 – 10.55.124.254	10.55.124.255
126	10.55.125.0/24	10.55.125.1 – 10.55.125.254	10.55.125.255
127	10.55.126.0/24	10.55.126.1 – 10.55.126.254	10.55.126.255
128	10.55.127.0/24	10.55.127.1 – 10.55.127.254	10.55.127.255
129	10.55.128.0/24	10.55.128.1 – 10.55.128.254	10.55.128.255
130	10.55.129.0/24	10.55.129.1 – 10.55.129.254	10.55.129.255
131	10.55.130.0/24	10.55.130.1 – 10.55.130.254	10.55.130.255
132	10.55.131.0/24	10.55.131.1 – 10.55.131.254	10.55.131.255
133	10.55.132.0/24	10.55.132.1 – 10.55.132.254	10.55.132.255
134	10.55.133.0/24	10.55.133.1 – 10.55.133.254	10.55.133.255
135	10.55.134.0/24	10.55.134.1 – 10.55.134.254	10.55.134.255
136	10.55.135.0/24	10.55.135.1 – 10.55.135.254	10.55.135.255
137	10.55.136.0/24	10.55.136.1 – 10.55.136.254	10.55.136.255
138	10.55.137.0/24	10.55.137.1 – 10.55.137.254	10.55.137.255
139	10.55.138.0/24	10.55.138.1 – 10.55.138.254	10.55.138.255
140	10.55.139.0/24	10.55.139.1 – 10.55.139.254	10.55.139.255
141	10.55.140.0/24	10.55.140.1 – 10.55.140.254	10.55.140.255
142	10.55.141.0/24	10.55.141.1 – 10.55.141.254	10.55.141.255
143	10.55.142.0/24	10.55.142.1 – 10.55.142.254	10.55.142.255
144	10.55.143.0/24	10.55.143.1 – 10.55.143.254	10.55.143.255
145	10.55.144.0/24	10.55.144.1 – 10.55.144.254	10.55.144.255
146	10.55.145.0/24	10.55.145.1 – 10.55.145.254	10.55.145.255
147	10.55.146.0/24	10.55.146.1 – 10.55.146.254	10.55.146.255
148	10.55.147.0/24	10.55.147.1 – 10.55.147.254	10.55.147.255
149	10.55.148.0/24	10.55.148.1 – 10.55.148.254	10.55.148.255
150	10.55.149.0/24	10.55.149.1 – 10.55.149.254	10.55.149.255
151	10.55.150.0/24	10.55.150.1 – 10.55.150.254	10.55.150.255
152	10.55.151.0/24	10.55.151.1 – 10.55.151.254	10.55.151.255
153	10.55.152.0/24	10.55.152.1 – 10.55.152.254	10.55.152.255
154	10.55.153.0/24	10.55.153.1 – 10.55.153.254	10.55.153.255
155	10.55.154.0/24	10.55.154.1 – 10.55.154.254	10.55.154.255
156	10.55.155.0/24	10.55.155.1 – 10.55.155.254	10.55.155.255
157	10.55.156.0/24	10.55.156.1 – 10.55.156.254	10.55.156.255
158	10.55.157.0/24	10.55.157.1 – 10.55.157.254	10.55.157.255
159	10.55.158.0/24	10.55.158.1 – 10.55.158.254	10.55.158.255
160	10.55.159.0/24	10.55.159.1 – 10.55.159.254	10.55.159.255
161	10.55.160.0/24	10.55.160.1 – 10.55.160.254	10.55.160.255
162	10.55.161.0/24	10.55.161.1 – 10.55.161.254	10.55.161.255
163	10.55.162.0/24	10.55.162.1 – 10.55.162.254	10.55.162.255
164	10.55.163.0/24	10.55.163.1 – 10.55.163.254	10.55.163.255
165	10.55.164.0/24	10.55.164.1 – 10.55.164.254	10.55.164.255
166	10.55.165.0/24	10.55.165.1 – 10.55.165.254	10.55.165.255
167	10.55.166.0/24	10.55.166.1 – 10.55.166.254	10.55.166.255
168	10.55.167.0/24	10.55.167.1 – 10.55.167.254	10.55.167.255
169	10.55.168.0/24	10.55.168.1 – 10.55.168.254	10.55.168.255
170	10.55.169.0/24	10.55.169.1 – 10.55.169.254	10.55.169.255
171	10.55.170.0/24	10.55.170.1 – 10.55.170.254	10.55.170.255
172	10.55.171.0/24	10.55.171.1 – 10.55.171.254	10.55.171.255
173	10.55.172.0/24	10.55.172.1 – 10.55.172.254	10.55.172.255
174	10.55.173.0/24	10.55.173.1 – 10.55.173.254	10.55.173.255
175	10.55.174.0/24	10.55.174.1 – 10.55.174.254	10.55.174.255
176	10.55.175.0/24	10.55.175.1 – 10.55.175.254	10.55.175.255
177	10.55.176.0/24	10.55.176.1 – 10.55.176.254	10.55.176.255
178	10.55.177.0/24	10.55.177.1 – 10.55.177.254	10.55.177.255
179	10.55.178.0/24	10.55.178.1 – 10.55.178.254	10.55.178.255
180	10.55.179.0/24	10.55.179.1 – 10.55.179.254	10.55.179.255
181	10.55.180.0/24	10.55.180.1 – 10.55.180.254	10.55.180.255
182	10.55.181.0/24	10.55.181.1 – 10.55.181.254	10.55.181.255
183	10.55.182.0/24	10.55.182.1 – 10.55.182.254	10.55.182.255
184	10.55.183.0/24	10.55.183.1 – 10.55.183.254	10.55.183.255
185	10.55.184.0/24	10.55.184.1 – 10.55.184.254	10.55.184.255
186	10.55.185.0/24	10.55.185.1 – 10.55.185.254	10.55.185.255
187	10.55.186.0/24	10.55.186.1 – 10.55.186.254	10.55.186.255
188	10.55.187.0/24	10.55.187.1 – 10.55.187.254	10.55.187.255
189	10.55.188.0/24	10.55.188.1 – 10.55.188.254	10.55.188.255
190	10.55.189.0/24	10.55.189.1 – 10.55.189.254	10.55.189.255
191	10.55.190.0/24	10.55.190.1 – 10.55.190.254	10.55.190.255
192	10.55.191.0/24	10.55.191.1 – 10.55.191.254	10.55.191.255
193	10.55.192.0/24	10.55.192.1 – 10.55.192.254	10.55.192.255
194	10.55.193.0/24	10.55.193.1 – 10.55.193.254	10.55.193.255
195	10.55.194.0/24	10.55.194.1 – 10.55.194.254	10.55.194.255
196	10.55.195.0/24	10.55.195.1 – 10.55.195.254	10.55.195.255
197	10.55.196.0/24	10.55.196.1 – 10.55.196.254	10.55.196.255
198	10.55.197.0/24	10.55.197.1 – 10.55.197.254	10.55.197.255
199	10.55.198.0/24	10.55.198.1 – 10.55.198.254	10.55.198.255
200	10.55.199.0/24	10.55.199.1 – 10.55.199.254	10.55.199.255
201	10.55.200.0/24	10.55.200.1 – 10.55.200.254	10.55.200.255
202	10.55.201.0/24	10.55.201.1 – 10.55.201.254	10.55.201.255
203	10.55.202.0/24	10.55.202.1 – 10.55.202.254	10.55.202.255
204	10.55.203.0/24	10.55.203.1 – 10.55.203.254	10.55.203.255
205	10.55.204.0/24	10.55.204.1 – 10.55.204.254	10.55.204.255
206	10.55.205.0/24	10.55.205.1 – 10.55.205.254	10.55.205.255
207	10.55.206.0/24	10.55.206.1 – 10.55.206.254	10.55.206.255
208	10.55.207.0/24	10.55.207.1 – 10.55.207.254	10.55.207.255
209	10.55.208.0/24	10.55.208.1 – 10.55.208.254	10.55.208.255
210	10.55.209.0/24	10.55.209.1 – 10.55.209.254	10.55.209.255
211	10.55.210.0/24	10.55.210.1 – 10.55.210.254	10.55.210.255
212	10.55.211.0/24	10.55.211.1 – 10.55.211.254	10.55.211.255
213	10.55.212.0/24	10.55.212.1 – 10.55.212.254	10.55.212.255
214	10.55.213.0/24	10.55.213.1 – 10.55.213.254	10.55.213.255
215	10.55.214.0/24	10.55.214.1 – 10.55.214.254	10.55.214.255
216	10.55.215.0/24	10.55.215.1 – 10.55.215.254	10.55.215.255
217	10.55.216.0/24	10.55.216.1 – 10.55.216.254	10.55.216.255
218	10.55.217.0/24	10.55.217.1 – 10.55.217.254	10.55.217.255
219	10.55.218.0/24	10.55.218.1 – 10.55.218.254	10.55.218.255
220	10.55.219.0/24	10.55.219.1 – 10.55.219.254	10.55.219.255
221	10.55.220.0/24	10.55.220.1 – 10.55.220.254	10.55.220.255
222	10.55.221.0/24	10.55.221.1 – 10.55.221.254	10.55.221.255
223	10.55.222.0/24	10.55.222.1 – 10.55.222.254	10.55.222.255
224	10.55.223.0/24	10.55.223.1 – 10.55.223.254	10.55.223.255
225	10.55.224.0/24	10.55.224.1 – 10.55.224.254	10.55.224.255
226	10.55.225.0/24	10.55.225.1 – 10.55.225.254	10.55.225.255
227	10.55.226.0/24	10.55.226.1 – 10.55.226.254	10.55.226.255
228	10.55.227.0/24	10.55.227.1 – 10.55.227.254	10.55.227.255
229	10.55.228.0/24	10.55.228.1 – 10.55.228.254	10.55.228.255
230	10.55.229.0/24	10.55.229.1 – 10.55.229.254	10.55.229.255
231	10.55.230.0/24	10.55.230.1 – 10.55.230.254	10.55.230.255
232	10.55.231.0/24	10.55.231.1 – 10.55.231.254	10.55.231.255
233	10.55.232.0/24	10.55.232.1 – 10.55.232.254	10.55.232.255
234	10.55.233.0/24	10.55.233.1 – 10.55.233.254	10.55.233.255
235	10.55.234.0/24	10.55.234.1 – 10.55.234.254	10.55.234.255
236	10.55.235.0/24	10.55.235.1 – 10.55.235.254	10.55.235.255
237	10.55.236.0/24	10.55.236.1 – 10.55.236.254	10.55.236.255
238	10.55.237.0/24	10.55.237.1 – 10.55.237.254	10.55.237.255
239	10.55.238.0/24	10.55.238.1 – 10.55.238.254	10.55.238.255
240	10.55.239.0/24	10.55.239.1 – 10.55.239.254	10.55.239.255
241	10.55.240.0/24	10.55.240.1 – 10.55.240.254	10.55.240.255
242	10.55.241.0/24	10.55.241.1 – 10.55.241.254	10.55.241.255
243	10.55.242.0/24	10.55.242.1 – 10.55.242.254	10.55.242.255
244	10.55.243.0/24	10.55.243.1 – 10.55.243.254	10.55.243.255
245	10.55.244.0/24	10.55.244.1 – 10.55.244.254	10.55.244.255
246	10.55.245.0/24	10.55.245.1 – 10.55.245.254	10.55.245.255
247	10.55.246.0/24	10.55.246.1 – 10.55.246.254	10.55.246.255
248	10.55.247.0/24	10.55.247.1 – 10.55.247.254	10.55.247.255
249	10.55.248.0/24	10.55.248.1 – 10.55.248.254	10.55.248.255
250	10.55.249.0/24	10.55.249.1 – 10.55.249.254	10.55.249.255
251	10.55.250.0/24	10.55.250.1 – 10.55.250.254	10.55.250.255
252	10.55.251.0/24	10.55.251.1 – 10.55.251.254	10.55.251.255
253	10.55.252.0/24	10.55.252.1 – 10.55.252.254	10.55.252.255
254	10.55.253.0/24	10.55.253.1 – 10.55.253.254	10.55.253.255
255	10.55.254.0/24	10.55.254.1 – 10.55.254.254	10.55.254.255
256	10.55.255.0/24	10.55.255.1 – 10.55.255.254	10.55.255.255

01 / table

IPv4 CIDR prefix table.

Click a prefix longer than your network to split it into subnets.

prefix	subnet mask	addresses	hosts	in your /16
/0	0.0.0.0	4,294,967,296	4,294,967,294	-
/1	128.0.0.0	2,147,483,648	2,147,483,646	-
/2	192.0.0.0	1,073,741,824	1,073,741,822	-
/3	224.0.0.0	536,870,912	536,870,910	-
/4	240.0.0.0	268,435,456	268,435,454	-
/5	248.0.0.0	134,217,728	134,217,726	-
/6	252.0.0.0	67,108,864	67,108,862	-
/7	254.0.0.0	33,554,432	33,554,430	-
/8	255.0.0.0	16,777,216	16,777,214	-
/9	255.128.0.0	8,388,608	8,388,606	-
/10	255.192.0.0	4,194,304	4,194,302	-
/11	255.224.0.0	2,097,152	2,097,150	-
/12	255.240.0.0	1,048,576	1,048,574	-
/13	255.248.0.0	524,288	524,286	-
/14	255.252.0.0	262,144	262,142	-
/15	255.254.0.0	131,072	131,070	-
/16	255.255.0.0	65,536	65,534	1
/17	255.255.128.0	32,768	32,766	2 split →
/18	255.255.192.0	16,384	16,382	4 split →
/19	255.255.224.0	8,192	8,190	8 split →
/20	255.255.240.0	4,096	4,094	16 split →
/21	255.255.248.0	2,048	2,046	32 split →
/22	255.255.252.0	1,024	1,022	64 split →
/23	255.255.254.0	512	510	128 split →
/24	255.255.255.0	256	254	256 split →
/25	255.255.255.128	128	126	512 split →
/26	255.255.255.192	64	62	1,024 split →
/27	255.255.255.224	32	30	2,048 split →
/28	255.255.255.240	16	14	4,096 split →
/29	255.255.255.248	8	6	8,192 split →
/30	255.255.255.252	4	2	16,384 split →
/31	255.255.255.254	2	2	32,768 split →
/32	255.255.255.255	1	1	65,536 split →

02 / faq

About this calculator.

How do I use this subnet calculator?

▼

Type an IP address followed by a prefix, like 192.168.1.10/24, or by a subnet mask, like 192.168.1.10 255.255.255.0. Without a prefix it uses /24. Click a row in the table to split the network into smaller subnets.

Why are usable hosts always 2 fewer?

▼

The first address in a subnet is the network address and the last is the broadcast address, so neither can go to a device. The exceptions are /31 (point-to-point links, RFC 3021) and /32 (a single address), which use every address.

Can I use it from a terminal?

▼

Yes. curl 'ipku.in/en/tools/ipv4-subnet-calculator?q=192.168.1.10/24' returns the result as plain text.

Learn how to work it out →