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IP subnet calculator

Type an address with its prefix or mask to see the network, its usable range and masks. Split it into smaller subnets, or look up any prefix in the reference tables.

Network76.32.0.0/14
Usable hosts262,142
Subnet mask255.252.0.0
Addresses262,144
Network address
76.32.0.0
Broadcast address
76.35.255.255
First usable
76.32.0.1
Last usable
76.35.255.254
Usable hosts
262,142 (262,144 less the network and broadcast addresses)
Subnet mask
255.252.0.0
Wildcard mask
0.3.255.255 (Cisco ACLs, OSPF)
Prefix length
/14
Type
Public public
Old class
A (default /8)
As numbers
Hex 4C200000 · Integer 1277165568 to 1277427711
Reverse DNS zones
32.76.in-addr.arpa
33.76.in-addr.arpa
34.76.in-addr.arpa
35.76.in-addr.arpa
/14 is not on a 8-bit boundary, so it takes 4 /16 zones.
Binary
Binary view
Binary (network bits bold, host bits grey)Dotted
Address01001100.00100000.00000000.0000000076.32.0.0
Subnet mask11111111.11111100.00000000.00000000255.252.0.0
Network01001100.00100000.00000000.0000000076.32.0.0
Broadcast01001100.00100011.11111111.1111111176.35.255.255
Split into smaller subnets/22
/15 (2)/16 (4)/17 (8)/18 (16)/19 (32)/20 (64)/21 (128)/22 (256)/23 (512)/24 (1,024)/25 (2,048)/26 (4,096)

76.32.0.0/14 makes 256 subnets of /22.

Subnets
#SubnetUsable hosts rangeBroadcastHosts
176.32.0.0/2276.32.0.1 to 76.32.3.25476.32.3.2551,022
276.32.4.0/2276.32.4.1 to 76.32.7.25476.32.7.2551,022
376.32.8.0/2276.32.8.1 to 76.32.11.25476.32.11.2551,022
476.32.12.0/2276.32.12.1 to 76.32.15.25476.32.15.2551,022
576.32.16.0/2276.32.16.1 to 76.32.19.25476.32.19.2551,022
676.32.20.0/2276.32.20.1 to 76.32.23.25476.32.23.2551,022
776.32.24.0/2276.32.24.1 to 76.32.27.25476.32.27.2551,022
876.32.28.0/2276.32.28.1 to 76.32.31.25476.32.31.2551,022
976.32.32.0/2276.32.32.1 to 76.32.35.25476.32.35.2551,022
1076.32.36.0/2276.32.36.1 to 76.32.39.25476.32.39.2551,022
1176.32.40.0/2276.32.40.1 to 76.32.43.25476.32.43.2551,022
1276.32.44.0/2276.32.44.1 to 76.32.47.25476.32.47.2551,022
1376.32.48.0/2276.32.48.1 to 76.32.51.25476.32.51.2551,022
1476.32.52.0/2276.32.52.1 to 76.32.55.25476.32.55.2551,022
1576.32.56.0/2276.32.56.1 to 76.32.59.25476.32.59.2551,022
1676.32.60.0/2276.32.60.1 to 76.32.63.25476.32.63.2551,022
1776.32.64.0/2276.32.64.1 to 76.32.67.25476.32.67.2551,022
1876.32.68.0/2276.32.68.1 to 76.32.71.25476.32.71.2551,022
1976.32.72.0/2276.32.72.1 to 76.32.75.25476.32.75.2551,022
2076.32.76.0/2276.32.76.1 to 76.32.79.25476.32.79.2551,022
2176.32.80.0/2276.32.80.1 to 76.32.83.25476.32.83.2551,022
2276.32.84.0/2276.32.84.1 to 76.32.87.25476.32.87.2551,022
2376.32.88.0/2276.32.88.1 to 76.32.91.25476.32.91.2551,022
2476.32.92.0/2276.32.92.1 to 76.32.95.25476.32.95.2551,022
2576.32.96.0/2276.32.96.1 to 76.32.99.25476.32.99.2551,022
2676.32.100.0/2276.32.100.1 to 76.32.103.25476.32.103.2551,022
2776.32.104.0/2276.32.104.1 to 76.32.107.25476.32.107.2551,022
2876.32.108.0/2276.32.108.1 to 76.32.111.25476.32.111.2551,022
2976.32.112.0/2276.32.112.1 to 76.32.115.25476.32.115.2551,022
3076.32.116.0/2276.32.116.1 to 76.32.119.25476.32.119.2551,022
3176.32.120.0/2276.32.120.1 to 76.32.123.25476.32.123.2551,022
3276.32.124.0/2276.32.124.1 to 76.32.127.25476.32.127.2551,022
3376.32.128.0/2276.32.128.1 to 76.32.131.25476.32.131.2551,022
3476.32.132.0/2276.32.132.1 to 76.32.135.25476.32.135.2551,022
3576.32.136.0/2276.32.136.1 to 76.32.139.25476.32.139.2551,022
3676.32.140.0/2276.32.140.1 to 76.32.143.25476.32.143.2551,022
3776.32.144.0/2276.32.144.1 to 76.32.147.25476.32.147.2551,022
3876.32.148.0/2276.32.148.1 to 76.32.151.25476.32.151.2551,022
3976.32.152.0/2276.32.152.1 to 76.32.155.25476.32.155.2551,022
4076.32.156.0/2276.32.156.1 to 76.32.159.25476.32.159.2551,022
4176.32.160.0/2276.32.160.1 to 76.32.163.25476.32.163.2551,022
4276.32.164.0/2276.32.164.1 to 76.32.167.25476.32.167.2551,022
4376.32.168.0/2276.32.168.1 to 76.32.171.25476.32.171.2551,022
4476.32.172.0/2276.32.172.1 to 76.32.175.25476.32.175.2551,022
4576.32.176.0/2276.32.176.1 to 76.32.179.25476.32.179.2551,022
4676.32.180.0/2276.32.180.1 to 76.32.183.25476.32.183.2551,022
4776.32.184.0/2276.32.184.1 to 76.32.187.25476.32.187.2551,022
4876.32.188.0/2276.32.188.1 to 76.32.191.25476.32.191.2551,022
4976.32.192.0/2276.32.192.1 to 76.32.195.25476.32.195.2551,022
5076.32.196.0/2276.32.196.1 to 76.32.199.25476.32.199.2551,022
5176.32.200.0/2276.32.200.1 to 76.32.203.25476.32.203.2551,022
5276.32.204.0/2276.32.204.1 to 76.32.207.25476.32.207.2551,022
5376.32.208.0/2276.32.208.1 to 76.32.211.25476.32.211.2551,022
5476.32.212.0/2276.32.212.1 to 76.32.215.25476.32.215.2551,022
5576.32.216.0/2276.32.216.1 to 76.32.219.25476.32.219.2551,022
5676.32.220.0/2276.32.220.1 to 76.32.223.25476.32.223.2551,022
5776.32.224.0/2276.32.224.1 to 76.32.227.25476.32.227.2551,022
5876.32.228.0/2276.32.228.1 to 76.32.231.25476.32.231.2551,022
5976.32.232.0/2276.32.232.1 to 76.32.235.25476.32.235.2551,022
6076.32.236.0/2276.32.236.1 to 76.32.239.25476.32.239.2551,022
6176.32.240.0/2276.32.240.1 to 76.32.243.25476.32.243.2551,022
6276.32.244.0/2276.32.244.1 to 76.32.247.25476.32.247.2551,022
6376.32.248.0/2276.32.248.1 to 76.32.251.25476.32.251.2551,022
6476.32.252.0/2276.32.252.1 to 76.32.255.25476.32.255.2551,022
6576.33.0.0/2276.33.0.1 to 76.33.3.25476.33.3.2551,022
6676.33.4.0/2276.33.4.1 to 76.33.7.25476.33.7.2551,022
6776.33.8.0/2276.33.8.1 to 76.33.11.25476.33.11.2551,022
6876.33.12.0/2276.33.12.1 to 76.33.15.25476.33.15.2551,022
6976.33.16.0/2276.33.16.1 to 76.33.19.25476.33.19.2551,022
7076.33.20.0/2276.33.20.1 to 76.33.23.25476.33.23.2551,022
7176.33.24.0/2276.33.24.1 to 76.33.27.25476.33.27.2551,022
7276.33.28.0/2276.33.28.1 to 76.33.31.25476.33.31.2551,022
7376.33.32.0/2276.33.32.1 to 76.33.35.25476.33.35.2551,022
7476.33.36.0/2276.33.36.1 to 76.33.39.25476.33.39.2551,022
7576.33.40.0/2276.33.40.1 to 76.33.43.25476.33.43.2551,022
7676.33.44.0/2276.33.44.1 to 76.33.47.25476.33.47.2551,022
7776.33.48.0/2276.33.48.1 to 76.33.51.25476.33.51.2551,022
7876.33.52.0/2276.33.52.1 to 76.33.55.25476.33.55.2551,022
7976.33.56.0/2276.33.56.1 to 76.33.59.25476.33.59.2551,022
8076.33.60.0/2276.33.60.1 to 76.33.63.25476.33.63.2551,022
8176.33.64.0/2276.33.64.1 to 76.33.67.25476.33.67.2551,022
8276.33.68.0/2276.33.68.1 to 76.33.71.25476.33.71.2551,022
8376.33.72.0/2276.33.72.1 to 76.33.75.25476.33.75.2551,022
8476.33.76.0/2276.33.76.1 to 76.33.79.25476.33.79.2551,022
8576.33.80.0/2276.33.80.1 to 76.33.83.25476.33.83.2551,022
8676.33.84.0/2276.33.84.1 to 76.33.87.25476.33.87.2551,022
8776.33.88.0/2276.33.88.1 to 76.33.91.25476.33.91.2551,022
8876.33.92.0/2276.33.92.1 to 76.33.95.25476.33.95.2551,022
8976.33.96.0/2276.33.96.1 to 76.33.99.25476.33.99.2551,022
9076.33.100.0/2276.33.100.1 to 76.33.103.25476.33.103.2551,022
9176.33.104.0/2276.33.104.1 to 76.33.107.25476.33.107.2551,022
9276.33.108.0/2276.33.108.1 to 76.33.111.25476.33.111.2551,022
9376.33.112.0/2276.33.112.1 to 76.33.115.25476.33.115.2551,022
9476.33.116.0/2276.33.116.1 to 76.33.119.25476.33.119.2551,022
9576.33.120.0/2276.33.120.1 to 76.33.123.25476.33.123.2551,022
9676.33.124.0/2276.33.124.1 to 76.33.127.25476.33.127.2551,022
9776.33.128.0/2276.33.128.1 to 76.33.131.25476.33.131.2551,022
9876.33.132.0/2276.33.132.1 to 76.33.135.25476.33.135.2551,022
9976.33.136.0/2276.33.136.1 to 76.33.139.25476.33.139.2551,022
10076.33.140.0/2276.33.140.1 to 76.33.143.25476.33.143.2551,022
10176.33.144.0/2276.33.144.1 to 76.33.147.25476.33.147.2551,022
10276.33.148.0/2276.33.148.1 to 76.33.151.25476.33.151.2551,022
10376.33.152.0/2276.33.152.1 to 76.33.155.25476.33.155.2551,022
10476.33.156.0/2276.33.156.1 to 76.33.159.25476.33.159.2551,022
10576.33.160.0/2276.33.160.1 to 76.33.163.25476.33.163.2551,022
10676.33.164.0/2276.33.164.1 to 76.33.167.25476.33.167.2551,022
10776.33.168.0/2276.33.168.1 to 76.33.171.25476.33.171.2551,022
10876.33.172.0/2276.33.172.1 to 76.33.175.25476.33.175.2551,022
10976.33.176.0/2276.33.176.1 to 76.33.179.25476.33.179.2551,022
11076.33.180.0/2276.33.180.1 to 76.33.183.25476.33.183.2551,022
11176.33.184.0/2276.33.184.1 to 76.33.187.25476.33.187.2551,022
11276.33.188.0/2276.33.188.1 to 76.33.191.25476.33.191.2551,022
11376.33.192.0/2276.33.192.1 to 76.33.195.25476.33.195.2551,022
11476.33.196.0/2276.33.196.1 to 76.33.199.25476.33.199.2551,022
11576.33.200.0/2276.33.200.1 to 76.33.203.25476.33.203.2551,022
11676.33.204.0/2276.33.204.1 to 76.33.207.25476.33.207.2551,022
11776.33.208.0/2276.33.208.1 to 76.33.211.25476.33.211.2551,022
11876.33.212.0/2276.33.212.1 to 76.33.215.25476.33.215.2551,022
11976.33.216.0/2276.33.216.1 to 76.33.219.25476.33.219.2551,022
12076.33.220.0/2276.33.220.1 to 76.33.223.25476.33.223.2551,022
12176.33.224.0/2276.33.224.1 to 76.33.227.25476.33.227.2551,022
12276.33.228.0/2276.33.228.1 to 76.33.231.25476.33.231.2551,022
12376.33.232.0/2276.33.232.1 to 76.33.235.25476.33.235.2551,022
12476.33.236.0/2276.33.236.1 to 76.33.239.25476.33.239.2551,022
12576.33.240.0/2276.33.240.1 to 76.33.243.25476.33.243.2551,022
12676.33.244.0/2276.33.244.1 to 76.33.247.25476.33.247.2551,022
12776.33.248.0/2276.33.248.1 to 76.33.251.25476.33.251.2551,022
12876.33.252.0/2276.33.252.1 to 76.33.255.25476.33.255.2551,022
12976.34.0.0/2276.34.0.1 to 76.34.3.25476.34.3.2551,022
13076.34.4.0/2276.34.4.1 to 76.34.7.25476.34.7.2551,022
13176.34.8.0/2276.34.8.1 to 76.34.11.25476.34.11.2551,022
13276.34.12.0/2276.34.12.1 to 76.34.15.25476.34.15.2551,022
13376.34.16.0/2276.34.16.1 to 76.34.19.25476.34.19.2551,022
13476.34.20.0/2276.34.20.1 to 76.34.23.25476.34.23.2551,022
13576.34.24.0/2276.34.24.1 to 76.34.27.25476.34.27.2551,022
13676.34.28.0/2276.34.28.1 to 76.34.31.25476.34.31.2551,022
13776.34.32.0/2276.34.32.1 to 76.34.35.25476.34.35.2551,022
13876.34.36.0/2276.34.36.1 to 76.34.39.25476.34.39.2551,022
13976.34.40.0/2276.34.40.1 to 76.34.43.25476.34.43.2551,022
14076.34.44.0/2276.34.44.1 to 76.34.47.25476.34.47.2551,022
14176.34.48.0/2276.34.48.1 to 76.34.51.25476.34.51.2551,022
14276.34.52.0/2276.34.52.1 to 76.34.55.25476.34.55.2551,022
14376.34.56.0/2276.34.56.1 to 76.34.59.25476.34.59.2551,022
14476.34.60.0/2276.34.60.1 to 76.34.63.25476.34.63.2551,022
14576.34.64.0/2276.34.64.1 to 76.34.67.25476.34.67.2551,022
14676.34.68.0/2276.34.68.1 to 76.34.71.25476.34.71.2551,022
14776.34.72.0/2276.34.72.1 to 76.34.75.25476.34.75.2551,022
14876.34.76.0/2276.34.76.1 to 76.34.79.25476.34.79.2551,022
14976.34.80.0/2276.34.80.1 to 76.34.83.25476.34.83.2551,022
15076.34.84.0/2276.34.84.1 to 76.34.87.25476.34.87.2551,022
15176.34.88.0/2276.34.88.1 to 76.34.91.25476.34.91.2551,022
15276.34.92.0/2276.34.92.1 to 76.34.95.25476.34.95.2551,022
15376.34.96.0/2276.34.96.1 to 76.34.99.25476.34.99.2551,022
15476.34.100.0/2276.34.100.1 to 76.34.103.25476.34.103.2551,022
15576.34.104.0/2276.34.104.1 to 76.34.107.25476.34.107.2551,022
15676.34.108.0/2276.34.108.1 to 76.34.111.25476.34.111.2551,022
15776.34.112.0/2276.34.112.1 to 76.34.115.25476.34.115.2551,022
15876.34.116.0/2276.34.116.1 to 76.34.119.25476.34.119.2551,022
15976.34.120.0/2276.34.120.1 to 76.34.123.25476.34.123.2551,022
16076.34.124.0/2276.34.124.1 to 76.34.127.25476.34.127.2551,022
16176.34.128.0/2276.34.128.1 to 76.34.131.25476.34.131.2551,022
16276.34.132.0/2276.34.132.1 to 76.34.135.25476.34.135.2551,022
16376.34.136.0/2276.34.136.1 to 76.34.139.25476.34.139.2551,022
16476.34.140.0/2276.34.140.1 to 76.34.143.25476.34.143.2551,022
16576.34.144.0/2276.34.144.1 to 76.34.147.25476.34.147.2551,022
16676.34.148.0/2276.34.148.1 to 76.34.151.25476.34.151.2551,022
16776.34.152.0/2276.34.152.1 to 76.34.155.25476.34.155.2551,022
16876.34.156.0/2276.34.156.1 to 76.34.159.25476.34.159.2551,022
16976.34.160.0/2276.34.160.1 to 76.34.163.25476.34.163.2551,022
17076.34.164.0/2276.34.164.1 to 76.34.167.25476.34.167.2551,022
17176.34.168.0/2276.34.168.1 to 76.34.171.25476.34.171.2551,022
17276.34.172.0/2276.34.172.1 to 76.34.175.25476.34.175.2551,022
17376.34.176.0/2276.34.176.1 to 76.34.179.25476.34.179.2551,022
17476.34.180.0/2276.34.180.1 to 76.34.183.25476.34.183.2551,022
17576.34.184.0/2276.34.184.1 to 76.34.187.25476.34.187.2551,022
17676.34.188.0/2276.34.188.1 to 76.34.191.25476.34.191.2551,022
17776.34.192.0/2276.34.192.1 to 76.34.195.25476.34.195.2551,022
17876.34.196.0/2276.34.196.1 to 76.34.199.25476.34.199.2551,022
17976.34.200.0/2276.34.200.1 to 76.34.203.25476.34.203.2551,022
18076.34.204.0/2276.34.204.1 to 76.34.207.25476.34.207.2551,022
18176.34.208.0/2276.34.208.1 to 76.34.211.25476.34.211.2551,022
18276.34.212.0/2276.34.212.1 to 76.34.215.25476.34.215.2551,022
18376.34.216.0/2276.34.216.1 to 76.34.219.25476.34.219.2551,022
18476.34.220.0/2276.34.220.1 to 76.34.223.25476.34.223.2551,022
18576.34.224.0/2276.34.224.1 to 76.34.227.25476.34.227.2551,022
18676.34.228.0/2276.34.228.1 to 76.34.231.25476.34.231.2551,022
18776.34.232.0/2276.34.232.1 to 76.34.235.25476.34.235.2551,022
18876.34.236.0/2276.34.236.1 to 76.34.239.25476.34.239.2551,022
18976.34.240.0/2276.34.240.1 to 76.34.243.25476.34.243.2551,022
19076.34.244.0/2276.34.244.1 to 76.34.247.25476.34.247.2551,022
19176.34.248.0/2276.34.248.1 to 76.34.251.25476.34.251.2551,022
19276.34.252.0/2276.34.252.1 to 76.34.255.25476.34.255.2551,022
19376.35.0.0/2276.35.0.1 to 76.35.3.25476.35.3.2551,022
19476.35.4.0/2276.35.4.1 to 76.35.7.25476.35.7.2551,022
19576.35.8.0/2276.35.8.1 to 76.35.11.25476.35.11.2551,022
19676.35.12.0/2276.35.12.1 to 76.35.15.25476.35.15.2551,022
19776.35.16.0/2276.35.16.1 to 76.35.19.25476.35.19.2551,022
19876.35.20.0/2276.35.20.1 to 76.35.23.25476.35.23.2551,022
19976.35.24.0/2276.35.24.1 to 76.35.27.25476.35.27.2551,022
20076.35.28.0/2276.35.28.1 to 76.35.31.25476.35.31.2551,022
20176.35.32.0/2276.35.32.1 to 76.35.35.25476.35.35.2551,022
20276.35.36.0/2276.35.36.1 to 76.35.39.25476.35.39.2551,022
20376.35.40.0/2276.35.40.1 to 76.35.43.25476.35.43.2551,022
20476.35.44.0/2276.35.44.1 to 76.35.47.25476.35.47.2551,022
20576.35.48.0/2276.35.48.1 to 76.35.51.25476.35.51.2551,022
20676.35.52.0/2276.35.52.1 to 76.35.55.25476.35.55.2551,022
20776.35.56.0/2276.35.56.1 to 76.35.59.25476.35.59.2551,022
20876.35.60.0/2276.35.60.1 to 76.35.63.25476.35.63.2551,022
20976.35.64.0/2276.35.64.1 to 76.35.67.25476.35.67.2551,022
21076.35.68.0/2276.35.68.1 to 76.35.71.25476.35.71.2551,022
21176.35.72.0/2276.35.72.1 to 76.35.75.25476.35.75.2551,022
21276.35.76.0/2276.35.76.1 to 76.35.79.25476.35.79.2551,022
21376.35.80.0/2276.35.80.1 to 76.35.83.25476.35.83.2551,022
21476.35.84.0/2276.35.84.1 to 76.35.87.25476.35.87.2551,022
21576.35.88.0/2276.35.88.1 to 76.35.91.25476.35.91.2551,022
21676.35.92.0/2276.35.92.1 to 76.35.95.25476.35.95.2551,022
21776.35.96.0/2276.35.96.1 to 76.35.99.25476.35.99.2551,022
21876.35.100.0/2276.35.100.1 to 76.35.103.25476.35.103.2551,022
21976.35.104.0/2276.35.104.1 to 76.35.107.25476.35.107.2551,022
22076.35.108.0/2276.35.108.1 to 76.35.111.25476.35.111.2551,022
22176.35.112.0/2276.35.112.1 to 76.35.115.25476.35.115.2551,022
22276.35.116.0/2276.35.116.1 to 76.35.119.25476.35.119.2551,022
22376.35.120.0/2276.35.120.1 to 76.35.123.25476.35.123.2551,022
22476.35.124.0/2276.35.124.1 to 76.35.127.25476.35.127.2551,022
22576.35.128.0/2276.35.128.1 to 76.35.131.25476.35.131.2551,022
22676.35.132.0/2276.35.132.1 to 76.35.135.25476.35.135.2551,022
22776.35.136.0/2276.35.136.1 to 76.35.139.25476.35.139.2551,022
22876.35.140.0/2276.35.140.1 to 76.35.143.25476.35.143.2551,022
22976.35.144.0/2276.35.144.1 to 76.35.147.25476.35.147.2551,022
23076.35.148.0/2276.35.148.1 to 76.35.151.25476.35.151.2551,022
23176.35.152.0/2276.35.152.1 to 76.35.155.25476.35.155.2551,022
23276.35.156.0/2276.35.156.1 to 76.35.159.25476.35.159.2551,022
23376.35.160.0/2276.35.160.1 to 76.35.163.25476.35.163.2551,022
23476.35.164.0/2276.35.164.1 to 76.35.167.25476.35.167.2551,022
23576.35.168.0/2276.35.168.1 to 76.35.171.25476.35.171.2551,022
23676.35.172.0/2276.35.172.1 to 76.35.175.25476.35.175.2551,022
23776.35.176.0/2276.35.176.1 to 76.35.179.25476.35.179.2551,022
23876.35.180.0/2276.35.180.1 to 76.35.183.25476.35.183.2551,022
23976.35.184.0/2276.35.184.1 to 76.35.187.25476.35.187.2551,022
24076.35.188.0/2276.35.188.1 to 76.35.191.25476.35.191.2551,022
24176.35.192.0/2276.35.192.1 to 76.35.195.25476.35.195.2551,022
24276.35.196.0/2276.35.196.1 to 76.35.199.25476.35.199.2551,022
24376.35.200.0/2276.35.200.1 to 76.35.203.25476.35.203.2551,022
24476.35.204.0/2276.35.204.1 to 76.35.207.25476.35.207.2551,022
24576.35.208.0/2276.35.208.1 to 76.35.211.25476.35.211.2551,022
24676.35.212.0/2276.35.212.1 to 76.35.215.25476.35.215.2551,022
24776.35.216.0/2276.35.216.1 to 76.35.219.25476.35.219.2551,022
24876.35.220.0/2276.35.220.1 to 76.35.223.25476.35.223.2551,022
24976.35.224.0/2276.35.224.1 to 76.35.227.25476.35.227.2551,022
25076.35.228.0/2276.35.228.1 to 76.35.231.25476.35.231.2551,022
25176.35.232.0/2276.35.232.1 to 76.35.235.25476.35.235.2551,022
25276.35.236.0/2276.35.236.1 to 76.35.239.25476.35.239.2551,022
25376.35.240.0/2276.35.240.1 to 76.35.243.25476.35.243.2551,022
25476.35.244.0/2276.35.244.1 to 76.35.247.25476.35.247.2551,022
25576.35.248.0/2276.35.248.1 to 76.35.251.25476.35.251.2551,022
25676.35.252.0/2276.35.252.1 to 76.35.255.25476.35.255.2551,022

IPv4 CIDR reference (/0 to /32)

IPv4 prefix lengths
PrefixSubnet maskWildcardAddressesUsable hostsSizeTypical use
/00.0.0.0255.255.255.2554,294,967,2964,294,967,29416,777,216 × /24
/1128.0.0.0127.255.255.2552,147,483,6482,147,483,6468,388,608 × /24
/2192.0.0.063.255.255.2551,073,741,8241,073,741,8224,194,304 × /24
/3224.0.0.031.255.255.255536,870,912536,870,9102,097,152 × /24
/4240.0.0.015.255.255.255268,435,456268,435,4541,048,576 × /24
/5248.0.0.07.255.255.255134,217,728134,217,726524,288 × /24
/6252.0.0.03.255.255.25567,108,86467,108,862262,144 × /24
/7254.0.0.01.255.255.25533,554,43233,554,430131,072 × /24
/8255.0.0.00.255.255.25516,777,21616,777,21465,536 × /24Old class A; 10.0.0.0/8
/9255.128.0.00.127.255.2558,388,6088,388,60632,768 × /24
/10255.192.0.00.63.255.2554,194,3044,194,30216,384 × /24
/11255.224.0.00.31.255.2552,097,1522,097,1508,192 × /24
/12255.240.0.00.15.255.2551,048,5761,048,5744,096 × /24172.16.0.0/12
/13255.248.0.00.7.255.255524,288524,2862,048 × /24
/14255.252.0.00.3.255.255262,144262,1421,024 × /24
/15255.254.0.00.1.255.255131,072131,070512 × /24
/16255.255.0.00.0.255.25565,53665,534256 × /24Old class B; 192.168.0.0/16
/17255.255.128.00.0.127.25532,76832,766128 × /24
/18255.255.192.00.0.63.25516,38416,38264 × /24
/19255.255.224.00.0.31.2558,1928,19032 × /24
/20255.255.240.00.0.15.2554,0964,09416 × /24
/21255.255.248.00.0.7.2552,0482,0468 × /24
/22255.255.252.00.0.3.2551,0241,0224 × /24Large office or guest Wi-Fi (1,022 hosts)
/23255.255.254.00.0.1.2555125102 × /24Larger office LAN (510 hosts)
/24255.255.255.00.0.0.2552562541 × /24Typical office LAN (old class C)
/25255.255.255.1280.0.0.1271281261/2 of a /24Smaller LAN or VLAN
/26255.255.255.1920.0.0.6364621/4 of a /24Smaller LAN or VLAN
/27255.255.255.2240.0.0.3132301/8 of a /24Small VLAN, phones, cameras
/28255.255.255.2400.0.0.1516141/16 of a /24Small VLAN, phones, cameras
/29255.255.255.2480.0.0.7861/32 of a /24Small fixed public block (5 usable)
/30255.255.255.2520.0.0.3421/64 of a /24Point-to-point (old style)
/31255.255.255.2540.0.0.1221/128 of a /24Point-to-point link (RFC 3021)
/32255.255.255.2550.0.0.0111/256 of a /24One host

IPv6 prefix reference

IPv6 prefix lengths
PrefixAddresses/64 LANs/48 sitesNibbleTypical use
/342,535,295,865,117,307,932,921,825,928,971,026,432 (2^125)2,305,843,009,213,693,95235,184,372,088,832NoAll global unicast (2000::/3)
/165,192,296,858,534,827,628,530,496,329,220,096 (2^112)281,474,976,710,6564,294,967,296Yes
/20324,518,553,658,426,726,783,156,020,576,256 (2^108)17,592,186,044,416268,435,456YesLarge provider allocation (RIPE minimum for some)
/29633,825,300,114,114,700,748,351,602,688 (2^99)34,359,738,368524,288NoRIPE allocation to a provider (often)
/3279,228,162,514,264,337,593,543,950,336 (2^96)4,294,967,29665,536YesProvider allocation (RIPE default)
/364,951,760,157,141,521,099,596,496,896 (2^92)268,435,4564,096Yes
/40309,485,009,821,345,068,724,781,056 (2^88)16,777,216256Yes
/4419,342,813,113,834,066,795,298,816 (2^84)1,048,57616Yes
/481,208,925,819,614,629,174,706,176 (2^80)65,5361YesOne site or organisation (RIPE PI / assignment)
/5275,557,863,725,914,323,419,136 (2^76)4,096Yes
/564,722,366,482,869,645,213,696 (2^72)256YesSmall site or home (common provider assignment)
/60295,147,905,179,352,825,856 (2^68)16YesSome home broadband (16 LANs)
/6418,446,744,073,709,551,616 (2^64)1YesOne LAN or VLAN (needed for SLAAC)
/7272,057,594,037,927,936 (2^56)1/256 of a /64Yes
/80281,474,976,710,656 (2^48)1/65,536 of a /64Yes
/964,294,967,2961/4,294,967,296 of a /64YesEmbeds an IPv4 address (NAT64)
/11265,5361/281,474,976,710,656 of a /64Yes
/1202561/72,057,594,037,927,936 of a /64Yes
/124161/1,152,921,504,606,846,976 of a /64Yes
/12641/4,611,686,018,427,387,904 of a /64No
/12721/9,223,372,036,854,775,808 of a /64NoPoint-to-point link (RFC 6164)
/12811/18,446,744,073,709,551,616 of a /64YesOne host or loopback

Private and special ranges

IPv4

Special-purpose ranges
RangeNameWhat it is
255.255.255.255/32Limited broadcastEvery host on the local network
0.0.0.0/8This networkNot routed; 0.0.0.0 means "any address" in settings
10.0.0.0/8Private (RFC 1918)Office and home networks; not routed on the internet
100.64.0.0/10Shared address space (CGNAT)Used by providers behind carrier-grade NAT (RFC 6598)
127.0.0.0/8LoopbackThis computer
169.254.0.0/16Link-local (APIPA)Self-assigned when no DHCP server answers
172.16.0.0/12Private (RFC 1918)Office and home networks; not routed on the internet
192.0.0.0/24IETF protocol assignmentsSpecial uses such as DS-Lite
192.0.2.0/24Documentation (TEST-NET-1)For examples; never used on a network
192.88.99.0/246to4 relay (deprecated)Formerly anycast for 6to4
192.168.0.0/16Private (RFC 1918)Office and home networks; not routed on the internet
198.18.0.0/15BenchmarkingNetwork equipment testing (RFC 2544)
198.51.100.0/24Documentation (TEST-NET-2)For examples; never used on a network
203.0.113.0/24Documentation (TEST-NET-3)For examples; never used on a network
224.0.0.0/4MulticastOne-to-many traffic, such as IPTV and routing protocols
240.0.0.0/4ReservedFuture use; not usable on most systems

IPv6

Special-purpose ranges
RangeNameWhat it is
::/128UnspecifiedNo address; :: means "any address" in settings
::1/128LoopbackThis computer
::ffff:0:0/96IPv4-mappedAn IPv4 address written as IPv6
64:ff9b::/96NAT64IPv4 addresses reached through a NAT64 gateway
100::/64Discard onlyTraffic sent here is dropped (RFC 6666)
2001:db8::/32DocumentationFor examples; never used on a network
2001::/32TeredoIPv6 tunnelled over IPv4 UDP
2002::/166to4IPv6 tunnelled over IPv4 (largely retired)
3fff::/20DocumentationFor examples (RFC 9637)
fc00::/7Unique local (ULA)Private IPv6, like RFC 1918; usually fd00::/8
fe80::/10Link-localEvery IPv6 interface has one; not routed
ff00::/8MulticastOne-to-many traffic; replaces broadcast
2000::/3Global unicastPublic internet addresses

About this tool

A network is written as an address and a prefix length, such as 192.168.1.0/24: the first 24 bits name the network and the rest number the devices on it. The calculator works out where the network starts and ends, how many devices it holds, its subnet and wildcard masks, and the reverse DNS zone to ask your provider for.

It also splits a network into equal smaller ones (one per VLAN or site), turns a range of addresses into the fewest CIDR blocks for a firewall rule, and lists every IPv4 prefix length and the common IPv6 ones in reference tables.

Common questions

Why are two addresses lost in every IPv4 subnet?

The first address names the network and the last is the broadcast address, so a /24 has 256 addresses but 254 for devices. A /31 (a link between two routers) and a /32 (one host) are the exceptions.

What size of IPv6 network should a LAN use?

Always /64. Devices pick their own address within it (SLAAC), which needs the full 64 bits. A site usually gets a /48 or /56 from its provider, which holds 65,536 or 256 LANs.

What is a wildcard mask?

The subnet mask turned inside out: 255.255.255.0 becomes 0.0.0.255. Cisco access lists and OSPF use it to say which bits must match.

Which ranges can I use inside an office?

IPv4: 10.0.0.0/8, 172.16.0.0/12 and 192.168.0.0/16. IPv6: unique local addresses from fd00::/8, though most networks use the public prefix from their provider.