🧮 IP Calculator
Subnet calculation, ranges, masks and CIDR notation
Subnet Mask Selector
Network
| CIDR Notation | 172.0.0.0/21 |
| Network Address | 172.0.0.0 |
| Broadcast Address | 172.0.7.255 |
| First Host | 172.0.0.1 |
| Last Host | 172.0.7.254 |
Mask & Stats
| Subnet Mask | 255.255.248.0 |
| Wildcard Mask | 0.0.7.255 |
| Total Hosts | 2,048 |
| Usable Hosts | 2,046 |
| IP Class | Class B |
| Address Type | Public |
Binary Representation
IP IP in Binary
10101100.00000000.00000000.00000000
█ network bits
█ host bits
Mask in Binary
11111111.11111111.11111000.00000000
Subnet Splitter
| # | Subnet (/26) | Range | Broadcast Address | Usable Hosts |
|---|---|---|---|---|
| 1 | 172.0.0.0/26 | 172.0.0.1 — 172.0.0.62 | 172.0.0.63 | 62 |
| 2 | 172.0.0.64/26 | 172.0.0.65 — 172.0.0.126 | 172.0.0.127 | 62 |
| 3 | 172.0.0.128/26 | 172.0.0.129 — 172.0.0.190 | 172.0.0.191 | 62 |
| 4 | 172.0.0.192/26 | 172.0.0.193 — 172.0.0.254 | 172.0.0.255 | 62 |
| 5 | 172.0.1.0/26 | 172.0.1.1 — 172.0.1.62 | 172.0.1.63 | 62 |
| 6 | 172.0.1.64/26 | 172.0.1.65 — 172.0.1.126 | 172.0.1.127 | 62 |
| 7 | 172.0.1.128/26 | 172.0.1.129 — 172.0.1.190 | 172.0.1.191 | 62 |
| 8 | 172.0.1.192/26 | 172.0.1.193 — 172.0.1.254 | 172.0.1.255 | 62 |
| 9 | 172.0.2.0/26 | 172.0.2.1 — 172.0.2.62 | 172.0.2.63 | 62 |
| 10 | 172.0.2.64/26 | 172.0.2.65 — 172.0.2.126 | 172.0.2.127 | 62 |
| 11 | 172.0.2.128/26 | 172.0.2.129 — 172.0.2.190 | 172.0.2.191 | 62 |
| 12 | 172.0.2.192/26 | 172.0.2.193 — 172.0.2.254 | 172.0.2.255 | 62 |
| 13 | 172.0.3.0/26 | 172.0.3.1 — 172.0.3.62 | 172.0.3.63 | 62 |
| 14 | 172.0.3.64/26 | 172.0.3.65 — 172.0.3.126 | 172.0.3.127 | 62 |
| 15 | 172.0.3.128/26 | 172.0.3.129 — 172.0.3.190 | 172.0.3.191 | 62 |
| 16 | 172.0.3.192/26 | 172.0.3.193 — 172.0.3.254 | 172.0.3.255 | 62 |
| 17 | 172.0.4.0/26 | 172.0.4.1 — 172.0.4.62 | 172.0.4.63 | 62 |
| 18 | 172.0.4.64/26 | 172.0.4.65 — 172.0.4.126 | 172.0.4.127 | 62 |
| 19 | 172.0.4.128/26 | 172.0.4.129 — 172.0.4.190 | 172.0.4.191 | 62 |
| 20 | 172.0.4.192/26 | 172.0.4.193 — 172.0.4.254 | 172.0.4.255 | 62 |
| 21 | 172.0.5.0/26 | 172.0.5.1 — 172.0.5.62 | 172.0.5.63 | 62 |
| 22 | 172.0.5.64/26 | 172.0.5.65 — 172.0.5.126 | 172.0.5.127 | 62 |
| 23 | 172.0.5.128/26 | 172.0.5.129 — 172.0.5.190 | 172.0.5.191 | 62 |
| 24 | 172.0.5.192/26 | 172.0.5.193 — 172.0.5.254 | 172.0.5.255 | 62 |
| 25 | 172.0.6.0/26 | 172.0.6.1 — 172.0.6.62 | 172.0.6.63 | 62 |
| 26 | 172.0.6.64/26 | 172.0.6.65 — 172.0.6.126 | 172.0.6.127 | 62 |
| 27 | 172.0.6.128/26 | 172.0.6.129 — 172.0.6.190 | 172.0.6.191 | 62 |
| 28 | 172.0.6.192/26 | 172.0.6.193 — 172.0.6.254 | 172.0.6.255 | 62 |
| 29 | 172.0.7.0/26 | 172.0.7.1 — 172.0.7.62 | 172.0.7.63 | 62 |
| 30 | 172.0.7.64/26 | 172.0.7.65 — 172.0.7.126 | 172.0.7.127 | 62 |
| 31 | 172.0.7.128/26 | 172.0.7.129 — 172.0.7.190 | 172.0.7.191 | 62 |
| 32 | 172.0.7.192/26 | 172.0.7.193 — 172.0.7.254 | 172.0.7.255 | 62 |
Converter
IP → Integer
2885681152
Mask → CIDR
/ 21
Range (hex)
0xAC000000 — 0xAC0007FF
Quick Converter (no reload)
IP → Integer
Integer → IP
📊 Subnet Visualization
172.0.0.0
172.0.7.255
Network
▲ 172.0.0.0
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 |