29.5.144.0/21
PublicClass A — /21 prefix — 2,046 usable hosts
Network address — the base address of the block (29.5.144.0). All devices in this subnet share this prefix. Cannot be assigned to a host.
Broadcast address — packets sent to 29.5.151.255 are delivered to every device in the subnet. Also reserved — not assignable.
Usable hosts — the 2,046 addresses between those two that you can assign to servers, VMs, or interfaces.
Subnet mask — 255.255.248.0 is the dotted-decimal equivalent of /21. Older tools and Cisco configs use this format instead of CIDR slash notation.
Full Details
| CIDR Notation | 29.5.144.0/21 |
| Network Address | 29.5.144.0 |
| Broadcast Address | 29.5.151.255 |
| Subnet Mask | 255.255.248.0 |
| Wildcard Mask | 0.0.7.255 |
| Prefix Length | /21 |
| IP Address Class | Class A |
| Total IP Addresses | 2,048 |
| Usable Host Addresses | 2,046 |
| First Usable IP | 29.5.144.1 |
| Last Usable IP | 29.5.151.254 |
| Network (Hex) | 0x1D059000 |
| Broadcast (Hex) | 0x1D0597FF |
| Address Type | Public / Globally Routable |
Binary Representation
The first 21 bits (1s in the mask) identify the network. The remaining 11 bits identify hosts within the network.
Split into Equal Subnets
Split 29.5.144.0/21 into 2 equal /22 subnets (1,022 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 29.5.144.0/22 | 29.5.144.0 | 29.5.144.1 | 29.5.147.254 | 29.5.147.255 | 1,022 |
| 2 | 29.5.148.0/22 | 29.5.148.0 | 29.5.148.1 | 29.5.151.254 | 29.5.151.255 | 1,022 |
Split 29.5.144.0/21 into 4 equal /23 subnets (510 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 29.5.144.0/23 | 29.5.144.0 | 29.5.144.1 | 29.5.145.254 | 29.5.145.255 | 510 |
| 2 | 29.5.146.0/23 | 29.5.146.0 | 29.5.146.1 | 29.5.147.254 | 29.5.147.255 | 510 |
| 3 | 29.5.148.0/23 | 29.5.148.0 | 29.5.148.1 | 29.5.149.254 | 29.5.149.255 | 510 |
| 4 | 29.5.150.0/23 | 29.5.150.0 | 29.5.150.1 | 29.5.151.254 | 29.5.151.255 | 510 |
Split 29.5.144.0/21 into 8 equal /24 subnets (254 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 29.5.144.0/24 | 29.5.144.0 | 29.5.144.1 | 29.5.144.254 | 29.5.144.255 | 254 |
| 2 | 29.5.145.0/24 | 29.5.145.0 | 29.5.145.1 | 29.5.145.254 | 29.5.145.255 | 254 |
| 3 | 29.5.146.0/24 | 29.5.146.0 | 29.5.146.1 | 29.5.146.254 | 29.5.146.255 | 254 |
| 4 | 29.5.147.0/24 | 29.5.147.0 | 29.5.147.1 | 29.5.147.254 | 29.5.147.255 | 254 |
| 5 | 29.5.148.0/24 | 29.5.148.0 | 29.5.148.1 | 29.5.148.254 | 29.5.148.255 | 254 |
| 6 | 29.5.149.0/24 | 29.5.149.0 | 29.5.149.1 | 29.5.149.254 | 29.5.149.255 | 254 |
| 7 | 29.5.150.0/24 | 29.5.150.0 | 29.5.150.1 | 29.5.150.254 | 29.5.150.255 | 254 |
| 8 | 29.5.151.0/24 | 29.5.151.0 | 29.5.151.1 | 29.5.151.254 | 29.5.151.255 | 254 |
Split 29.5.144.0/21 into 16 equal /25 subnets (126 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 29.5.144.0/25 | 29.5.144.0 | 29.5.144.1 | 29.5.144.126 | 29.5.144.127 | 126 |
| 2 | 29.5.144.128/25 | 29.5.144.128 | 29.5.144.129 | 29.5.144.254 | 29.5.144.255 | 126 |
| 3 | 29.5.145.0/25 | 29.5.145.0 | 29.5.145.1 | 29.5.145.126 | 29.5.145.127 | 126 |
| 4 | 29.5.145.128/25 | 29.5.145.128 | 29.5.145.129 | 29.5.145.254 | 29.5.145.255 | 126 |
| 5 | 29.5.146.0/25 | 29.5.146.0 | 29.5.146.1 | 29.5.146.126 | 29.5.146.127 | 126 |
| 6 | 29.5.146.128/25 | 29.5.146.128 | 29.5.146.129 | 29.5.146.254 | 29.5.146.255 | 126 |
| 7 | 29.5.147.0/25 | 29.5.147.0 | 29.5.147.1 | 29.5.147.126 | 29.5.147.127 | 126 |
| 8 | 29.5.147.128/25 | 29.5.147.128 | 29.5.147.129 | 29.5.147.254 | 29.5.147.255 | 126 |
| 9 | 29.5.148.0/25 | 29.5.148.0 | 29.5.148.1 | 29.5.148.126 | 29.5.148.127 | 126 |
| 10 | 29.5.148.128/25 | 29.5.148.128 | 29.5.148.129 | 29.5.148.254 | 29.5.148.255 | 126 |
| 11 | 29.5.149.0/25 | 29.5.149.0 | 29.5.149.1 | 29.5.149.126 | 29.5.149.127 | 126 |
| 12 | 29.5.149.128/25 | 29.5.149.128 | 29.5.149.129 | 29.5.149.254 | 29.5.149.255 | 126 |
| 13 | 29.5.150.0/25 | 29.5.150.0 | 29.5.150.1 | 29.5.150.126 | 29.5.150.127 | 126 |
| 14 | 29.5.150.128/25 | 29.5.150.128 | 29.5.150.129 | 29.5.150.254 | 29.5.150.255 | 126 |
| 15 | 29.5.151.0/25 | 29.5.151.0 | 29.5.151.1 | 29.5.151.126 | 29.5.151.127 | 126 |
| 16 | 29.5.151.128/25 | 29.5.151.128 | 29.5.151.129 | 29.5.151.254 | 29.5.151.255 | 126 |