18.79.0.0/19
PublicClass A — /19 prefix — 8,190 usable hosts
Network address — the base address of the block (18.79.0.0). All devices in this subnet share this prefix. Cannot be assigned to a host.
Broadcast address — packets sent to 18.79.31.255 are delivered to every device in the subnet. Also reserved — not assignable.
Usable hosts — the 8,190 addresses between those two that you can assign to servers, VMs, or interfaces.
Subnet mask — 255.255.224.0 is the dotted-decimal equivalent of /19. Older tools and Cisco configs use this format instead of CIDR slash notation.
Full Details
| CIDR Notation | 18.79.0.0/19 |
| Network Address | 18.79.0.0 |
| Broadcast Address | 18.79.31.255 |
| Subnet Mask | 255.255.224.0 |
| Wildcard Mask | 0.0.31.255 |
| Prefix Length | /19 |
| IP Address Class | Class A |
| Total IP Addresses | 8,192 |
| Usable Host Addresses | 8,190 |
| First Usable IP | 18.79.0.1 |
| Last Usable IP | 18.79.31.254 |
| Network (Hex) | 0x124F0000 |
| Broadcast (Hex) | 0x124F1FFF |
| Address Type | Public / Globally Routable |
Binary Representation
The first 19 bits (1s in the mask) identify the network. The remaining 13 bits identify hosts within the network.
Split into Equal Subnets
Split 18.79.0.0/19 into 2 equal /20 subnets (4,094 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 18.79.0.0/20 | 18.79.0.0 | 18.79.0.1 | 18.79.15.254 | 18.79.15.255 | 4,094 |
| 2 | 18.79.16.0/20 | 18.79.16.0 | 18.79.16.1 | 18.79.31.254 | 18.79.31.255 | 4,094 |
Split 18.79.0.0/19 into 4 equal /21 subnets (2,046 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 18.79.0.0/21 | 18.79.0.0 | 18.79.0.1 | 18.79.7.254 | 18.79.7.255 | 2,046 |
| 2 | 18.79.8.0/21 | 18.79.8.0 | 18.79.8.1 | 18.79.15.254 | 18.79.15.255 | 2,046 |
| 3 | 18.79.16.0/21 | 18.79.16.0 | 18.79.16.1 | 18.79.23.254 | 18.79.23.255 | 2,046 |
| 4 | 18.79.24.0/21 | 18.79.24.0 | 18.79.24.1 | 18.79.31.254 | 18.79.31.255 | 2,046 |
Split 18.79.0.0/19 into 8 equal /22 subnets (1,022 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 18.79.0.0/22 | 18.79.0.0 | 18.79.0.1 | 18.79.3.254 | 18.79.3.255 | 1,022 |
| 2 | 18.79.4.0/22 | 18.79.4.0 | 18.79.4.1 | 18.79.7.254 | 18.79.7.255 | 1,022 |
| 3 | 18.79.8.0/22 | 18.79.8.0 | 18.79.8.1 | 18.79.11.254 | 18.79.11.255 | 1,022 |
| 4 | 18.79.12.0/22 | 18.79.12.0 | 18.79.12.1 | 18.79.15.254 | 18.79.15.255 | 1,022 |
| 5 | 18.79.16.0/22 | 18.79.16.0 | 18.79.16.1 | 18.79.19.254 | 18.79.19.255 | 1,022 |
| 6 | 18.79.20.0/22 | 18.79.20.0 | 18.79.20.1 | 18.79.23.254 | 18.79.23.255 | 1,022 |
| 7 | 18.79.24.0/22 | 18.79.24.0 | 18.79.24.1 | 18.79.27.254 | 18.79.27.255 | 1,022 |
| 8 | 18.79.28.0/22 | 18.79.28.0 | 18.79.28.1 | 18.79.31.254 | 18.79.31.255 | 1,022 |
Split 18.79.0.0/19 into 16 equal /23 subnets (510 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 18.79.0.0/23 | 18.79.0.0 | 18.79.0.1 | 18.79.1.254 | 18.79.1.255 | 510 |
| 2 | 18.79.2.0/23 | 18.79.2.0 | 18.79.2.1 | 18.79.3.254 | 18.79.3.255 | 510 |
| 3 | 18.79.4.0/23 | 18.79.4.0 | 18.79.4.1 | 18.79.5.254 | 18.79.5.255 | 510 |
| 4 | 18.79.6.0/23 | 18.79.6.0 | 18.79.6.1 | 18.79.7.254 | 18.79.7.255 | 510 |
| 5 | 18.79.8.0/23 | 18.79.8.0 | 18.79.8.1 | 18.79.9.254 | 18.79.9.255 | 510 |
| 6 | 18.79.10.0/23 | 18.79.10.0 | 18.79.10.1 | 18.79.11.254 | 18.79.11.255 | 510 |
| 7 | 18.79.12.0/23 | 18.79.12.0 | 18.79.12.1 | 18.79.13.254 | 18.79.13.255 | 510 |
| 8 | 18.79.14.0/23 | 18.79.14.0 | 18.79.14.1 | 18.79.15.254 | 18.79.15.255 | 510 |
| 9 | 18.79.16.0/23 | 18.79.16.0 | 18.79.16.1 | 18.79.17.254 | 18.79.17.255 | 510 |
| 10 | 18.79.18.0/23 | 18.79.18.0 | 18.79.18.1 | 18.79.19.254 | 18.79.19.255 | 510 |
| 11 | 18.79.20.0/23 | 18.79.20.0 | 18.79.20.1 | 18.79.21.254 | 18.79.21.255 | 510 |
| 12 | 18.79.22.0/23 | 18.79.22.0 | 18.79.22.1 | 18.79.23.254 | 18.79.23.255 | 510 |
| 13 | 18.79.24.0/23 | 18.79.24.0 | 18.79.24.1 | 18.79.25.254 | 18.79.25.255 | 510 |
| 14 | 18.79.26.0/23 | 18.79.26.0 | 18.79.26.1 | 18.79.27.254 | 18.79.27.255 | 510 |
| 15 | 18.79.28.0/23 | 18.79.28.0 | 18.79.28.1 | 18.79.29.254 | 18.79.29.255 | 510 |
| 16 | 18.79.30.0/23 | 18.79.30.0 | 18.79.30.1 | 18.79.31.254 | 18.79.31.255 | 510 |