10.8.0.0/24
Private (RFC 1918) RFC 1918The 10.8.0.0/24 range is the default tunnel network in OpenVPN server configurations. The VPN server takes 10.8.0.1 and clients are assigned addresses from 10.8.0.2 upward. This range appears in countless default OpenVPN config examples.
Network address — the base address of the block (10.8.0.0). All devices in this subnet share this prefix. Cannot be assigned to a host.
Broadcast address — packets sent to 10.8.0.255 are delivered to every device in the subnet. Also reserved — not assignable.
Usable hosts — the 254 addresses between those two that you can assign to servers, VMs, or interfaces.
Subnet mask — 255.255.255.0 is the dotted-decimal equivalent of /24. Older tools and Cisco configs use this format instead of CIDR slash notation.
Full Details
| CIDR Notation | 10.8.0.0/24 |
| Network Address | 10.8.0.0 |
| Broadcast Address | 10.8.0.255 |
| Subnet Mask | 255.255.255.0 |
| Wildcard Mask | 0.0.0.255 |
| Prefix Length | /24 |
| IP Address Class | Class A |
| Total IP Addresses | 256 |
| Usable Host Addresses | 254 |
| First Usable IP | 10.8.0.1 |
| Last Usable IP | 10.8.0.254 |
| Network (Hex) | 0x0A080000 |
| Broadcast (Hex) | 0x0A0800FF |
| Governing RFC | RFC 1918 |
| Address Type | Private (RFC 1918) |
Binary Representation
The first 24 bits (1s in the mask) identify the network. The remaining 8 bits identify hosts within the network.
Split into Equal Subnets
Split 10.8.0.0/24 into 2 equal /25 subnets (126 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 10.8.0.0/25 | 10.8.0.0 | 10.8.0.1 | 10.8.0.126 | 10.8.0.127 | 126 |
| 2 | 10.8.0.128/25 | 10.8.0.128 | 10.8.0.129 | 10.8.0.254 | 10.8.0.255 | 126 |
Split 10.8.0.0/24 into 4 equal /26 subnets (62 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 10.8.0.0/26 | 10.8.0.0 | 10.8.0.1 | 10.8.0.62 | 10.8.0.63 | 62 |
| 2 | 10.8.0.64/26 | 10.8.0.64 | 10.8.0.65 | 10.8.0.126 | 10.8.0.127 | 62 |
| 3 | 10.8.0.128/26 | 10.8.0.128 | 10.8.0.129 | 10.8.0.190 | 10.8.0.191 | 62 |
| 4 | 10.8.0.192/26 | 10.8.0.192 | 10.8.0.193 | 10.8.0.254 | 10.8.0.255 | 62 |
Split 10.8.0.0/24 into 8 equal /27 subnets (30 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 10.8.0.0/27 | 10.8.0.0 | 10.8.0.1 | 10.8.0.30 | 10.8.0.31 | 30 |
| 2 | 10.8.0.32/27 | 10.8.0.32 | 10.8.0.33 | 10.8.0.62 | 10.8.0.63 | 30 |
| 3 | 10.8.0.64/27 | 10.8.0.64 | 10.8.0.65 | 10.8.0.94 | 10.8.0.95 | 30 |
| 4 | 10.8.0.96/27 | 10.8.0.96 | 10.8.0.97 | 10.8.0.126 | 10.8.0.127 | 30 |
| 5 | 10.8.0.128/27 | 10.8.0.128 | 10.8.0.129 | 10.8.0.158 | 10.8.0.159 | 30 |
| 6 | 10.8.0.160/27 | 10.8.0.160 | 10.8.0.161 | 10.8.0.190 | 10.8.0.191 | 30 |
| 7 | 10.8.0.192/27 | 10.8.0.192 | 10.8.0.193 | 10.8.0.222 | 10.8.0.223 | 30 |
| 8 | 10.8.0.224/27 | 10.8.0.224 | 10.8.0.225 | 10.8.0.254 | 10.8.0.255 | 30 |
Split 10.8.0.0/24 into 16 equal /28 subnets (14 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 10.8.0.0/28 | 10.8.0.0 | 10.8.0.1 | 10.8.0.14 | 10.8.0.15 | 14 |
| 2 | 10.8.0.16/28 | 10.8.0.16 | 10.8.0.17 | 10.8.0.30 | 10.8.0.31 | 14 |
| 3 | 10.8.0.32/28 | 10.8.0.32 | 10.8.0.33 | 10.8.0.46 | 10.8.0.47 | 14 |
| 4 | 10.8.0.48/28 | 10.8.0.48 | 10.8.0.49 | 10.8.0.62 | 10.8.0.63 | 14 |
| 5 | 10.8.0.64/28 | 10.8.0.64 | 10.8.0.65 | 10.8.0.78 | 10.8.0.79 | 14 |
| 6 | 10.8.0.80/28 | 10.8.0.80 | 10.8.0.81 | 10.8.0.94 | 10.8.0.95 | 14 |
| 7 | 10.8.0.96/28 | 10.8.0.96 | 10.8.0.97 | 10.8.0.110 | 10.8.0.111 | 14 |
| 8 | 10.8.0.112/28 | 10.8.0.112 | 10.8.0.113 | 10.8.0.126 | 10.8.0.127 | 14 |
| 9 | 10.8.0.128/28 | 10.8.0.128 | 10.8.0.129 | 10.8.0.142 | 10.8.0.143 | 14 |
| 10 | 10.8.0.144/28 | 10.8.0.144 | 10.8.0.145 | 10.8.0.158 | 10.8.0.159 | 14 |
| 11 | 10.8.0.160/28 | 10.8.0.160 | 10.8.0.161 | 10.8.0.174 | 10.8.0.175 | 14 |
| 12 | 10.8.0.176/28 | 10.8.0.176 | 10.8.0.177 | 10.8.0.190 | 10.8.0.191 | 14 |
| 13 | 10.8.0.192/28 | 10.8.0.192 | 10.8.0.193 | 10.8.0.206 | 10.8.0.207 | 14 |
| 14 | 10.8.0.208/28 | 10.8.0.208 | 10.8.0.209 | 10.8.0.222 | 10.8.0.223 | 14 |
| 15 | 10.8.0.224/28 | 10.8.0.224 | 10.8.0.225 | 10.8.0.238 | 10.8.0.239 | 14 |
| 16 | 10.8.0.240/28 | 10.8.0.240 | 10.8.0.241 | 10.8.0.254 | 10.8.0.255 | 14 |
IP Address Sample
Showing first 16 of 256 total IPs.
Common Use Cases
- → OpenVPN server default tunnel network
- → Remote access VPN client IP pool
- → Site-to-site VPN tunnel addressing