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)10.38.0.0/15

network10.38.0.0/15

broadcast10.39.255.255

first host10.38.0.1

last host10.39.255.254

subnet mask255.254.0.0

wildcard0.1.255.255

addresses131,072

usable hosts131,070

classA

ipcalc 10.38.0.0/15

address00001010.00100110.00000000.00000000

subnet mask11111111.11111110.00000000.00000000

network00001010.00100110.00000000.00000000

broadcast00001010.00100111.11111111.11111111

green = network part, grey = host part

hex0x0a260000

decimal170262528

reverse dns0.0.38.10.in-addr.arpa

ipv4-mapped::ffff:a26:0

/15 split into /24 · 512 subnets

close ×

#	network	host range	broadcast
1	10.38.0.0/24	10.38.0.1 – 10.38.0.254	10.38.0.255
2	10.38.1.0/24	10.38.1.1 – 10.38.1.254	10.38.1.255
3	10.38.2.0/24	10.38.2.1 – 10.38.2.254	10.38.2.255
4	10.38.3.0/24	10.38.3.1 – 10.38.3.254	10.38.3.255
5	10.38.4.0/24	10.38.4.1 – 10.38.4.254	10.38.4.255
6	10.38.5.0/24	10.38.5.1 – 10.38.5.254	10.38.5.255
7	10.38.6.0/24	10.38.6.1 – 10.38.6.254	10.38.6.255
8	10.38.7.0/24	10.38.7.1 – 10.38.7.254	10.38.7.255
9	10.38.8.0/24	10.38.8.1 – 10.38.8.254	10.38.8.255
10	10.38.9.0/24	10.38.9.1 – 10.38.9.254	10.38.9.255
11	10.38.10.0/24	10.38.10.1 – 10.38.10.254	10.38.10.255
12	10.38.11.0/24	10.38.11.1 – 10.38.11.254	10.38.11.255
13	10.38.12.0/24	10.38.12.1 – 10.38.12.254	10.38.12.255
14	10.38.13.0/24	10.38.13.1 – 10.38.13.254	10.38.13.255
15	10.38.14.0/24	10.38.14.1 – 10.38.14.254	10.38.14.255
16	10.38.15.0/24	10.38.15.1 – 10.38.15.254	10.38.15.255
17	10.38.16.0/24	10.38.16.1 – 10.38.16.254	10.38.16.255
18	10.38.17.0/24	10.38.17.1 – 10.38.17.254	10.38.17.255
19	10.38.18.0/24	10.38.18.1 – 10.38.18.254	10.38.18.255
20	10.38.19.0/24	10.38.19.1 – 10.38.19.254	10.38.19.255
21	10.38.20.0/24	10.38.20.1 – 10.38.20.254	10.38.20.255
22	10.38.21.0/24	10.38.21.1 – 10.38.21.254	10.38.21.255
23	10.38.22.0/24	10.38.22.1 – 10.38.22.254	10.38.22.255
24	10.38.23.0/24	10.38.23.1 – 10.38.23.254	10.38.23.255
25	10.38.24.0/24	10.38.24.1 – 10.38.24.254	10.38.24.255
26	10.38.25.0/24	10.38.25.1 – 10.38.25.254	10.38.25.255
27	10.38.26.0/24	10.38.26.1 – 10.38.26.254	10.38.26.255
28	10.38.27.0/24	10.38.27.1 – 10.38.27.254	10.38.27.255
29	10.38.28.0/24	10.38.28.1 – 10.38.28.254	10.38.28.255
30	10.38.29.0/24	10.38.29.1 – 10.38.29.254	10.38.29.255
31	10.38.30.0/24	10.38.30.1 – 10.38.30.254	10.38.30.255
32	10.38.31.0/24	10.38.31.1 – 10.38.31.254	10.38.31.255
33	10.38.32.0/24	10.38.32.1 – 10.38.32.254	10.38.32.255
34	10.38.33.0/24	10.38.33.1 – 10.38.33.254	10.38.33.255
35	10.38.34.0/24	10.38.34.1 – 10.38.34.254	10.38.34.255
36	10.38.35.0/24	10.38.35.1 – 10.38.35.254	10.38.35.255
37	10.38.36.0/24	10.38.36.1 – 10.38.36.254	10.38.36.255
38	10.38.37.0/24	10.38.37.1 – 10.38.37.254	10.38.37.255
39	10.38.38.0/24	10.38.38.1 – 10.38.38.254	10.38.38.255
40	10.38.39.0/24	10.38.39.1 – 10.38.39.254	10.38.39.255
41	10.38.40.0/24	10.38.40.1 – 10.38.40.254	10.38.40.255
42	10.38.41.0/24	10.38.41.1 – 10.38.41.254	10.38.41.255
43	10.38.42.0/24	10.38.42.1 – 10.38.42.254	10.38.42.255
44	10.38.43.0/24	10.38.43.1 – 10.38.43.254	10.38.43.255
45	10.38.44.0/24	10.38.44.1 – 10.38.44.254	10.38.44.255
46	10.38.45.0/24	10.38.45.1 – 10.38.45.254	10.38.45.255
47	10.38.46.0/24	10.38.46.1 – 10.38.46.254	10.38.46.255
48	10.38.47.0/24	10.38.47.1 – 10.38.47.254	10.38.47.255
49	10.38.48.0/24	10.38.48.1 – 10.38.48.254	10.38.48.255
50	10.38.49.0/24	10.38.49.1 – 10.38.49.254	10.38.49.255
51	10.38.50.0/24	10.38.50.1 – 10.38.50.254	10.38.50.255
52	10.38.51.0/24	10.38.51.1 – 10.38.51.254	10.38.51.255
53	10.38.52.0/24	10.38.52.1 – 10.38.52.254	10.38.52.255
54	10.38.53.0/24	10.38.53.1 – 10.38.53.254	10.38.53.255
55	10.38.54.0/24	10.38.54.1 – 10.38.54.254	10.38.54.255
56	10.38.55.0/24	10.38.55.1 – 10.38.55.254	10.38.55.255
57	10.38.56.0/24	10.38.56.1 – 10.38.56.254	10.38.56.255
58	10.38.57.0/24	10.38.57.1 – 10.38.57.254	10.38.57.255
59	10.38.58.0/24	10.38.58.1 – 10.38.58.254	10.38.58.255
60	10.38.59.0/24	10.38.59.1 – 10.38.59.254	10.38.59.255
61	10.38.60.0/24	10.38.60.1 – 10.38.60.254	10.38.60.255
62	10.38.61.0/24	10.38.61.1 – 10.38.61.254	10.38.61.255
63	10.38.62.0/24	10.38.62.1 – 10.38.62.254	10.38.62.255
64	10.38.63.0/24	10.38.63.1 – 10.38.63.254	10.38.63.255
65	10.38.64.0/24	10.38.64.1 – 10.38.64.254	10.38.64.255
66	10.38.65.0/24	10.38.65.1 – 10.38.65.254	10.38.65.255
67	10.38.66.0/24	10.38.66.1 – 10.38.66.254	10.38.66.255
68	10.38.67.0/24	10.38.67.1 – 10.38.67.254	10.38.67.255
69	10.38.68.0/24	10.38.68.1 – 10.38.68.254	10.38.68.255
70	10.38.69.0/24	10.38.69.1 – 10.38.69.254	10.38.69.255
71	10.38.70.0/24	10.38.70.1 – 10.38.70.254	10.38.70.255
72	10.38.71.0/24	10.38.71.1 – 10.38.71.254	10.38.71.255
73	10.38.72.0/24	10.38.72.1 – 10.38.72.254	10.38.72.255
74	10.38.73.0/24	10.38.73.1 – 10.38.73.254	10.38.73.255
75	10.38.74.0/24	10.38.74.1 – 10.38.74.254	10.38.74.255
76	10.38.75.0/24	10.38.75.1 – 10.38.75.254	10.38.75.255
77	10.38.76.0/24	10.38.76.1 – 10.38.76.254	10.38.76.255
78	10.38.77.0/24	10.38.77.1 – 10.38.77.254	10.38.77.255
79	10.38.78.0/24	10.38.78.1 – 10.38.78.254	10.38.78.255
80	10.38.79.0/24	10.38.79.1 – 10.38.79.254	10.38.79.255
81	10.38.80.0/24	10.38.80.1 – 10.38.80.254	10.38.80.255
82	10.38.81.0/24	10.38.81.1 – 10.38.81.254	10.38.81.255
83	10.38.82.0/24	10.38.82.1 – 10.38.82.254	10.38.82.255
84	10.38.83.0/24	10.38.83.1 – 10.38.83.254	10.38.83.255
85	10.38.84.0/24	10.38.84.1 – 10.38.84.254	10.38.84.255
86	10.38.85.0/24	10.38.85.1 – 10.38.85.254	10.38.85.255
87	10.38.86.0/24	10.38.86.1 – 10.38.86.254	10.38.86.255
88	10.38.87.0/24	10.38.87.1 – 10.38.87.254	10.38.87.255
89	10.38.88.0/24	10.38.88.1 – 10.38.88.254	10.38.88.255
90	10.38.89.0/24	10.38.89.1 – 10.38.89.254	10.38.89.255
91	10.38.90.0/24	10.38.90.1 – 10.38.90.254	10.38.90.255
92	10.38.91.0/24	10.38.91.1 – 10.38.91.254	10.38.91.255
93	10.38.92.0/24	10.38.92.1 – 10.38.92.254	10.38.92.255
94	10.38.93.0/24	10.38.93.1 – 10.38.93.254	10.38.93.255
95	10.38.94.0/24	10.38.94.1 – 10.38.94.254	10.38.94.255
96	10.38.95.0/24	10.38.95.1 – 10.38.95.254	10.38.95.255
97	10.38.96.0/24	10.38.96.1 – 10.38.96.254	10.38.96.255
98	10.38.97.0/24	10.38.97.1 – 10.38.97.254	10.38.97.255
99	10.38.98.0/24	10.38.98.1 – 10.38.98.254	10.38.98.255
100	10.38.99.0/24	10.38.99.1 – 10.38.99.254	10.38.99.255
101	10.38.100.0/24	10.38.100.1 – 10.38.100.254	10.38.100.255
102	10.38.101.0/24	10.38.101.1 – 10.38.101.254	10.38.101.255
103	10.38.102.0/24	10.38.102.1 – 10.38.102.254	10.38.102.255
104	10.38.103.0/24	10.38.103.1 – 10.38.103.254	10.38.103.255
105	10.38.104.0/24	10.38.104.1 – 10.38.104.254	10.38.104.255
106	10.38.105.0/24	10.38.105.1 – 10.38.105.254	10.38.105.255
107	10.38.106.0/24	10.38.106.1 – 10.38.106.254	10.38.106.255
108	10.38.107.0/24	10.38.107.1 – 10.38.107.254	10.38.107.255
109	10.38.108.0/24	10.38.108.1 – 10.38.108.254	10.38.108.255
110	10.38.109.0/24	10.38.109.1 – 10.38.109.254	10.38.109.255
111	10.38.110.0/24	10.38.110.1 – 10.38.110.254	10.38.110.255
112	10.38.111.0/24	10.38.111.1 – 10.38.111.254	10.38.111.255
113	10.38.112.0/24	10.38.112.1 – 10.38.112.254	10.38.112.255
114	10.38.113.0/24	10.38.113.1 – 10.38.113.254	10.38.113.255
115	10.38.114.0/24	10.38.114.1 – 10.38.114.254	10.38.114.255
116	10.38.115.0/24	10.38.115.1 – 10.38.115.254	10.38.115.255
117	10.38.116.0/24	10.38.116.1 – 10.38.116.254	10.38.116.255
118	10.38.117.0/24	10.38.117.1 – 10.38.117.254	10.38.117.255
119	10.38.118.0/24	10.38.118.1 – 10.38.118.254	10.38.118.255
120	10.38.119.0/24	10.38.119.1 – 10.38.119.254	10.38.119.255
121	10.38.120.0/24	10.38.120.1 – 10.38.120.254	10.38.120.255
122	10.38.121.0/24	10.38.121.1 – 10.38.121.254	10.38.121.255
123	10.38.122.0/24	10.38.122.1 – 10.38.122.254	10.38.122.255
124	10.38.123.0/24	10.38.123.1 – 10.38.123.254	10.38.123.255
125	10.38.124.0/24	10.38.124.1 – 10.38.124.254	10.38.124.255
126	10.38.125.0/24	10.38.125.1 – 10.38.125.254	10.38.125.255
127	10.38.126.0/24	10.38.126.1 – 10.38.126.254	10.38.126.255
128	10.38.127.0/24	10.38.127.1 – 10.38.127.254	10.38.127.255
129	10.38.128.0/24	10.38.128.1 – 10.38.128.254	10.38.128.255
130	10.38.129.0/24	10.38.129.1 – 10.38.129.254	10.38.129.255
131	10.38.130.0/24	10.38.130.1 – 10.38.130.254	10.38.130.255
132	10.38.131.0/24	10.38.131.1 – 10.38.131.254	10.38.131.255
133	10.38.132.0/24	10.38.132.1 – 10.38.132.254	10.38.132.255
134	10.38.133.0/24	10.38.133.1 – 10.38.133.254	10.38.133.255
135	10.38.134.0/24	10.38.134.1 – 10.38.134.254	10.38.134.255
136	10.38.135.0/24	10.38.135.1 – 10.38.135.254	10.38.135.255
137	10.38.136.0/24	10.38.136.1 – 10.38.136.254	10.38.136.255
138	10.38.137.0/24	10.38.137.1 – 10.38.137.254	10.38.137.255
139	10.38.138.0/24	10.38.138.1 – 10.38.138.254	10.38.138.255
140	10.38.139.0/24	10.38.139.1 – 10.38.139.254	10.38.139.255
141	10.38.140.0/24	10.38.140.1 – 10.38.140.254	10.38.140.255
142	10.38.141.0/24	10.38.141.1 – 10.38.141.254	10.38.141.255
143	10.38.142.0/24	10.38.142.1 – 10.38.142.254	10.38.142.255
144	10.38.143.0/24	10.38.143.1 – 10.38.143.254	10.38.143.255
145	10.38.144.0/24	10.38.144.1 – 10.38.144.254	10.38.144.255
146	10.38.145.0/24	10.38.145.1 – 10.38.145.254	10.38.145.255
147	10.38.146.0/24	10.38.146.1 – 10.38.146.254	10.38.146.255
148	10.38.147.0/24	10.38.147.1 – 10.38.147.254	10.38.147.255
149	10.38.148.0/24	10.38.148.1 – 10.38.148.254	10.38.148.255
150	10.38.149.0/24	10.38.149.1 – 10.38.149.254	10.38.149.255
151	10.38.150.0/24	10.38.150.1 – 10.38.150.254	10.38.150.255
152	10.38.151.0/24	10.38.151.1 – 10.38.151.254	10.38.151.255
153	10.38.152.0/24	10.38.152.1 – 10.38.152.254	10.38.152.255
154	10.38.153.0/24	10.38.153.1 – 10.38.153.254	10.38.153.255
155	10.38.154.0/24	10.38.154.1 – 10.38.154.254	10.38.154.255
156	10.38.155.0/24	10.38.155.1 – 10.38.155.254	10.38.155.255
157	10.38.156.0/24	10.38.156.1 – 10.38.156.254	10.38.156.255
158	10.38.157.0/24	10.38.157.1 – 10.38.157.254	10.38.157.255
159	10.38.158.0/24	10.38.158.1 – 10.38.158.254	10.38.158.255
160	10.38.159.0/24	10.38.159.1 – 10.38.159.254	10.38.159.255
161	10.38.160.0/24	10.38.160.1 – 10.38.160.254	10.38.160.255
162	10.38.161.0/24	10.38.161.1 – 10.38.161.254	10.38.161.255
163	10.38.162.0/24	10.38.162.1 – 10.38.162.254	10.38.162.255
164	10.38.163.0/24	10.38.163.1 – 10.38.163.254	10.38.163.255
165	10.38.164.0/24	10.38.164.1 – 10.38.164.254	10.38.164.255
166	10.38.165.0/24	10.38.165.1 – 10.38.165.254	10.38.165.255
167	10.38.166.0/24	10.38.166.1 – 10.38.166.254	10.38.166.255
168	10.38.167.0/24	10.38.167.1 – 10.38.167.254	10.38.167.255
169	10.38.168.0/24	10.38.168.1 – 10.38.168.254	10.38.168.255
170	10.38.169.0/24	10.38.169.1 – 10.38.169.254	10.38.169.255
171	10.38.170.0/24	10.38.170.1 – 10.38.170.254	10.38.170.255
172	10.38.171.0/24	10.38.171.1 – 10.38.171.254	10.38.171.255
173	10.38.172.0/24	10.38.172.1 – 10.38.172.254	10.38.172.255
174	10.38.173.0/24	10.38.173.1 – 10.38.173.254	10.38.173.255
175	10.38.174.0/24	10.38.174.1 – 10.38.174.254	10.38.174.255
176	10.38.175.0/24	10.38.175.1 – 10.38.175.254	10.38.175.255
177	10.38.176.0/24	10.38.176.1 – 10.38.176.254	10.38.176.255
178	10.38.177.0/24	10.38.177.1 – 10.38.177.254	10.38.177.255
179	10.38.178.0/24	10.38.178.1 – 10.38.178.254	10.38.178.255
180	10.38.179.0/24	10.38.179.1 – 10.38.179.254	10.38.179.255
181	10.38.180.0/24	10.38.180.1 – 10.38.180.254	10.38.180.255
182	10.38.181.0/24	10.38.181.1 – 10.38.181.254	10.38.181.255
183	10.38.182.0/24	10.38.182.1 – 10.38.182.254	10.38.182.255
184	10.38.183.0/24	10.38.183.1 – 10.38.183.254	10.38.183.255
185	10.38.184.0/24	10.38.184.1 – 10.38.184.254	10.38.184.255
186	10.38.185.0/24	10.38.185.1 – 10.38.185.254	10.38.185.255
187	10.38.186.0/24	10.38.186.1 – 10.38.186.254	10.38.186.255
188	10.38.187.0/24	10.38.187.1 – 10.38.187.254	10.38.187.255
189	10.38.188.0/24	10.38.188.1 – 10.38.188.254	10.38.188.255
190	10.38.189.0/24	10.38.189.1 – 10.38.189.254	10.38.189.255
191	10.38.190.0/24	10.38.190.1 – 10.38.190.254	10.38.190.255
192	10.38.191.0/24	10.38.191.1 – 10.38.191.254	10.38.191.255
193	10.38.192.0/24	10.38.192.1 – 10.38.192.254	10.38.192.255
194	10.38.193.0/24	10.38.193.1 – 10.38.193.254	10.38.193.255
195	10.38.194.0/24	10.38.194.1 – 10.38.194.254	10.38.194.255
196	10.38.195.0/24	10.38.195.1 – 10.38.195.254	10.38.195.255
197	10.38.196.0/24	10.38.196.1 – 10.38.196.254	10.38.196.255
198	10.38.197.0/24	10.38.197.1 – 10.38.197.254	10.38.197.255
199	10.38.198.0/24	10.38.198.1 – 10.38.198.254	10.38.198.255
200	10.38.199.0/24	10.38.199.1 – 10.38.199.254	10.38.199.255
201	10.38.200.0/24	10.38.200.1 – 10.38.200.254	10.38.200.255
202	10.38.201.0/24	10.38.201.1 – 10.38.201.254	10.38.201.255
203	10.38.202.0/24	10.38.202.1 – 10.38.202.254	10.38.202.255
204	10.38.203.0/24	10.38.203.1 – 10.38.203.254	10.38.203.255
205	10.38.204.0/24	10.38.204.1 – 10.38.204.254	10.38.204.255
206	10.38.205.0/24	10.38.205.1 – 10.38.205.254	10.38.205.255
207	10.38.206.0/24	10.38.206.1 – 10.38.206.254	10.38.206.255
208	10.38.207.0/24	10.38.207.1 – 10.38.207.254	10.38.207.255
209	10.38.208.0/24	10.38.208.1 – 10.38.208.254	10.38.208.255
210	10.38.209.0/24	10.38.209.1 – 10.38.209.254	10.38.209.255
211	10.38.210.0/24	10.38.210.1 – 10.38.210.254	10.38.210.255
212	10.38.211.0/24	10.38.211.1 – 10.38.211.254	10.38.211.255
213	10.38.212.0/24	10.38.212.1 – 10.38.212.254	10.38.212.255
214	10.38.213.0/24	10.38.213.1 – 10.38.213.254	10.38.213.255
215	10.38.214.0/24	10.38.214.1 – 10.38.214.254	10.38.214.255
216	10.38.215.0/24	10.38.215.1 – 10.38.215.254	10.38.215.255
217	10.38.216.0/24	10.38.216.1 – 10.38.216.254	10.38.216.255
218	10.38.217.0/24	10.38.217.1 – 10.38.217.254	10.38.217.255
219	10.38.218.0/24	10.38.218.1 – 10.38.218.254	10.38.218.255
220	10.38.219.0/24	10.38.219.1 – 10.38.219.254	10.38.219.255
221	10.38.220.0/24	10.38.220.1 – 10.38.220.254	10.38.220.255
222	10.38.221.0/24	10.38.221.1 – 10.38.221.254	10.38.221.255
223	10.38.222.0/24	10.38.222.1 – 10.38.222.254	10.38.222.255
224	10.38.223.0/24	10.38.223.1 – 10.38.223.254	10.38.223.255
225	10.38.224.0/24	10.38.224.1 – 10.38.224.254	10.38.224.255
226	10.38.225.0/24	10.38.225.1 – 10.38.225.254	10.38.225.255
227	10.38.226.0/24	10.38.226.1 – 10.38.226.254	10.38.226.255
228	10.38.227.0/24	10.38.227.1 – 10.38.227.254	10.38.227.255
229	10.38.228.0/24	10.38.228.1 – 10.38.228.254	10.38.228.255
230	10.38.229.0/24	10.38.229.1 – 10.38.229.254	10.38.229.255
231	10.38.230.0/24	10.38.230.1 – 10.38.230.254	10.38.230.255
232	10.38.231.0/24	10.38.231.1 – 10.38.231.254	10.38.231.255
233	10.38.232.0/24	10.38.232.1 – 10.38.232.254	10.38.232.255
234	10.38.233.0/24	10.38.233.1 – 10.38.233.254	10.38.233.255
235	10.38.234.0/24	10.38.234.1 – 10.38.234.254	10.38.234.255
236	10.38.235.0/24	10.38.235.1 – 10.38.235.254	10.38.235.255
237	10.38.236.0/24	10.38.236.1 – 10.38.236.254	10.38.236.255
238	10.38.237.0/24	10.38.237.1 – 10.38.237.254	10.38.237.255
239	10.38.238.0/24	10.38.238.1 – 10.38.238.254	10.38.238.255
240	10.38.239.0/24	10.38.239.1 – 10.38.239.254	10.38.239.255
241	10.38.240.0/24	10.38.240.1 – 10.38.240.254	10.38.240.255
242	10.38.241.0/24	10.38.241.1 – 10.38.241.254	10.38.241.255
243	10.38.242.0/24	10.38.242.1 – 10.38.242.254	10.38.242.255
244	10.38.243.0/24	10.38.243.1 – 10.38.243.254	10.38.243.255
245	10.38.244.0/24	10.38.244.1 – 10.38.244.254	10.38.244.255
246	10.38.245.0/24	10.38.245.1 – 10.38.245.254	10.38.245.255
247	10.38.246.0/24	10.38.246.1 – 10.38.246.254	10.38.246.255
248	10.38.247.0/24	10.38.247.1 – 10.38.247.254	10.38.247.255
249	10.38.248.0/24	10.38.248.1 – 10.38.248.254	10.38.248.255
250	10.38.249.0/24	10.38.249.1 – 10.38.249.254	10.38.249.255
251	10.38.250.0/24	10.38.250.1 – 10.38.250.254	10.38.250.255
252	10.38.251.0/24	10.38.251.1 – 10.38.251.254	10.38.251.255
253	10.38.252.0/24	10.38.252.1 – 10.38.252.254	10.38.252.255
254	10.38.253.0/24	10.38.253.1 – 10.38.253.254	10.38.253.255
255	10.38.254.0/24	10.38.254.1 – 10.38.254.254	10.38.254.255
256	10.38.255.0/24	10.38.255.1 – 10.38.255.254	10.38.255.255

showing 256 of 512

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 /15
/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	1
/16	255.255.0.0	65,536	65,534	2 split →
/17	255.255.128.0	32,768	32,766	4 split →
/18	255.255.192.0	16,384	16,382	8 split →
/19	255.255.224.0	8,192	8,190	16 split →
/20	255.255.240.0	4,096	4,094	32 split →
/21	255.255.248.0	2,048	2,046	64 split →
/22	255.255.252.0	1,024	1,022	128 split →
/23	255.255.254.0	512	510	256 split →
/24	255.255.255.0	256	254	512 split →
/25	255.255.255.128	128	126	1,024 split →
/26	255.255.255.192	64	62	2,048 split →
/27	255.255.255.224	32	30	4,096 split →
/28	255.255.255.240	16	14	8,192 split →
/29	255.255.255.248	8	6	16,384 split →
/30	255.255.255.252	4	2	32,768 split →
/31	255.255.255.254	2	2	65,536 split →
/32	255.255.255.255	1	1	131,072 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 →