Subnet Mask Selector
192.168.1.0/24 10.0.0.0/8 172.16.0.0/12 192.168.100.0/26 10.10.0.0/16
Network
CIDR Notation192.168.0.0/21
Network Address192.168.0.0
Broadcast Address192.168.7.255
First Host192.168.0.1
Last Host192.168.7.254
Mask & Stats
Subnet Mask255.255.248.0
Wildcard Mask0.0.7.255
Total Hosts2,048
Usable Hosts2,046
IP ClassClass C
Address Type Private
Binary Representation
IP IP in Binary
11000000.10101000.00000000.00000000
network bits   host bits
Mask in Binary
11111111.11111111.11111000.00000000
Subnet Splitter
Split into 2 subnets 4 subnets 8 subnets 16 subnets 32 subnets
#Subnet (/26)RangeBroadcast AddressUsable Hosts
1192.168.0.0/26192.168.0.1 — 192.168.0.62192.168.0.6362
2192.168.0.64/26192.168.0.65 — 192.168.0.126192.168.0.12762
3192.168.0.128/26192.168.0.129 — 192.168.0.190192.168.0.19162
4192.168.0.192/26192.168.0.193 — 192.168.0.254192.168.0.25562
5192.168.1.0/26192.168.1.1 — 192.168.1.62192.168.1.6362
6192.168.1.64/26192.168.1.65 — 192.168.1.126192.168.1.12762
7192.168.1.128/26192.168.1.129 — 192.168.1.190192.168.1.19162
8192.168.1.192/26192.168.1.193 — 192.168.1.254192.168.1.25562
9192.168.2.0/26192.168.2.1 — 192.168.2.62192.168.2.6362
10192.168.2.64/26192.168.2.65 — 192.168.2.126192.168.2.12762
11192.168.2.128/26192.168.2.129 — 192.168.2.190192.168.2.19162
12192.168.2.192/26192.168.2.193 — 192.168.2.254192.168.2.25562
13192.168.3.0/26192.168.3.1 — 192.168.3.62192.168.3.6362
14192.168.3.64/26192.168.3.65 — 192.168.3.126192.168.3.12762
15192.168.3.128/26192.168.3.129 — 192.168.3.190192.168.3.19162
16192.168.3.192/26192.168.3.193 — 192.168.3.254192.168.3.25562
17192.168.4.0/26192.168.4.1 — 192.168.4.62192.168.4.6362
18192.168.4.64/26192.168.4.65 — 192.168.4.126192.168.4.12762
19192.168.4.128/26192.168.4.129 — 192.168.4.190192.168.4.19162
20192.168.4.192/26192.168.4.193 — 192.168.4.254192.168.4.25562
21192.168.5.0/26192.168.5.1 — 192.168.5.62192.168.5.6362
22192.168.5.64/26192.168.5.65 — 192.168.5.126192.168.5.12762
23192.168.5.128/26192.168.5.129 — 192.168.5.190192.168.5.19162
24192.168.5.192/26192.168.5.193 — 192.168.5.254192.168.5.25562
25192.168.6.0/26192.168.6.1 — 192.168.6.62192.168.6.6362
26192.168.6.64/26192.168.6.65 — 192.168.6.126192.168.6.12762
27192.168.6.128/26192.168.6.129 — 192.168.6.190192.168.6.19162
28192.168.6.192/26192.168.6.193 — 192.168.6.254192.168.6.25562
29192.168.7.0/26192.168.7.1 — 192.168.7.62192.168.7.6362
30192.168.7.64/26192.168.7.65 — 192.168.7.126192.168.7.12762
31192.168.7.128/26192.168.7.129 — 192.168.7.190192.168.7.19162
32192.168.7.192/26192.168.7.193 — 192.168.7.254192.168.7.25562
Converter
IP → Integer
3232235520
Mask → CIDR
/ 21
Range (hex)
0xC0A80000 — 0xC0A807FF
Quick Converter (no reload)
IP → Integer
Integer → IP
📊 Subnet Visualization
192.168.0.0 192.168.7.255
Network ▲ 192.168.0.0 Broadcast
Usable hosts: 2,046
Reserved: 2
your_ip
📋 Subnet Cheat Sheet
CIDR Mask Hosts Usage
/8 255.0.0.0 16,777,214 Large Class A networks
/16 255.255.0.0 65,534 Medium corporate networks
/24 255.255.255.0 254 Typical home/office network
/25 255.255.255.128 126 Half of /24
/26 255.255.255.192 62 Small department
/27 255.255.255.224 30 Small office
/28 255.255.255.240 14 Micro-segment
/29 255.255.255.248 6 Point-to-point with hosts
/30 255.255.255.252 2 Point-to-point link
/31 255.255.255.254 2 P2P (RFC 3021)
/32 255.255.255.255 1 Single host route