/29 Subnet
6 usable hosts — tiny cluster
A /29 provides just 8 addresses with 6 usable hosts. Often used for small server clusters, infrastructure links, or the smallest practical subnet for a handful of devices.
Common Use Cases
- → Small server cluster (web + app + db)
- → Infrastructure management segment
- → Very small office or branch
Example /29 Networks
| CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|
| 10.0.0.0/29 | 10.0.0.0 | 10.0.0.1 | 10.0.0.6 | 10.0.0.7 | 6 |
| 172.16.0.0/29 | 172.16.0.0 | 172.16.0.1 | 172.16.0.6 | 172.16.0.7 | 6 |
| 172.31.0.0/29 | 172.31.0.0 | 172.31.0.1 | 172.31.0.6 | 172.31.0.7 | 6 |
| 192.168.0.0/29 | 192.168.0.0 | 192.168.0.1 | 192.168.0.6 | 192.168.0.7 | 6 |
| 192.168.1.0/29 | 192.168.1.0 | 192.168.1.1 | 192.168.1.6 | 192.168.1.7 | 6 |
| 10.0.1.0/29 | 10.0.1.0 | 10.0.1.1 | 10.0.1.6 | 10.0.1.7 | 6 |
How /29 Compares
| Prefix | Total IPs | Usable Hosts | Subnet Mask | Typical Use |
|---|---|---|---|---|
| /26 | 64 | 62 | 255.255.255.192 | Cloud per-tier subnet, small VLAN |
| /27 | 32 | 30 | 255.255.255.224 | Small workgroup / management subnet |
| /28 | 16 | 14 | 255.255.255.240 | AWS NAT/endpoint dedicated subnet |
| /29 ◀ | 8 | 6 | 255.255.255.248 | Tiny server cluster or infra segment |
| /30 | 4 | 2 | 255.255.255.252 | WAN point-to-point link |
| /31 | 2 | 2 | 255.255.255.254 | Modern P2P links (RFC 3021) |
| /32 | 1 | 1 | 255.255.255.255 | Single host — firewall rules, host routes |
Frequently Asked Questions
How many IPs are in a /29?
A /29 subnet contains 8 total IP addresses and 6 usable host addresses. The network address (first IP) and broadcast address (last IP) are reserved and cannot be assigned to hosts.
What is the subnet mask for /29?
The subnet mask for a /29 is 255.255.255.248.
In CIDR notation, the prefix length /29 means
the first 29 bits of the address are the network portion.
The wildcard (inverse) mask is 0.0.0.7.
How many /29 subnets fit in a /28?
Exactly 2 — a /28 can be split into two /29 subnets of equal size. Each /29 subnet has 6 usable hosts, compared to 14 in the parent /28.