127.16.224.0/19
Loopback RFC 5735Class A — /19 prefix — 8,190 usable hosts
Network address — the base address of the block (127.16.224.0). All devices in this subnet share this prefix. Cannot be assigned to a host.
Broadcast address — packets sent to 127.16.255.255 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 | 127.16.224.0/19 |
| Network Address | 127.16.224.0 |
| Broadcast Address | 127.16.255.255 |
| 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 | 127.16.224.1 |
| Last Usable IP | 127.16.255.254 |
| Network (Hex) | 0x7F10E000 |
| Broadcast (Hex) | 0x7F10FFFF |
| Governing RFC | RFC 5735 |
| Address Type | Loopback |
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 127.16.224.0/19 into 2 equal /20 subnets (4,094 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 127.16.224.0/20 | 127.16.224.0 | 127.16.224.1 | 127.16.239.254 | 127.16.239.255 | 4,094 |
| 2 | 127.16.240.0/20 | 127.16.240.0 | 127.16.240.1 | 127.16.255.254 | 127.16.255.255 | 4,094 |
Split 127.16.224.0/19 into 4 equal /21 subnets (2,046 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 127.16.224.0/21 | 127.16.224.0 | 127.16.224.1 | 127.16.231.254 | 127.16.231.255 | 2,046 |
| 2 | 127.16.232.0/21 | 127.16.232.0 | 127.16.232.1 | 127.16.239.254 | 127.16.239.255 | 2,046 |
| 3 | 127.16.240.0/21 | 127.16.240.0 | 127.16.240.1 | 127.16.247.254 | 127.16.247.255 | 2,046 |
| 4 | 127.16.248.0/21 | 127.16.248.0 | 127.16.248.1 | 127.16.255.254 | 127.16.255.255 | 2,046 |
Split 127.16.224.0/19 into 8 equal /22 subnets (1,022 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 127.16.224.0/22 | 127.16.224.0 | 127.16.224.1 | 127.16.227.254 | 127.16.227.255 | 1,022 |
| 2 | 127.16.228.0/22 | 127.16.228.0 | 127.16.228.1 | 127.16.231.254 | 127.16.231.255 | 1,022 |
| 3 | 127.16.232.0/22 | 127.16.232.0 | 127.16.232.1 | 127.16.235.254 | 127.16.235.255 | 1,022 |
| 4 | 127.16.236.0/22 | 127.16.236.0 | 127.16.236.1 | 127.16.239.254 | 127.16.239.255 | 1,022 |
| 5 | 127.16.240.0/22 | 127.16.240.0 | 127.16.240.1 | 127.16.243.254 | 127.16.243.255 | 1,022 |
| 6 | 127.16.244.0/22 | 127.16.244.0 | 127.16.244.1 | 127.16.247.254 | 127.16.247.255 | 1,022 |
| 7 | 127.16.248.0/22 | 127.16.248.0 | 127.16.248.1 | 127.16.251.254 | 127.16.251.255 | 1,022 |
| 8 | 127.16.252.0/22 | 127.16.252.0 | 127.16.252.1 | 127.16.255.254 | 127.16.255.255 | 1,022 |
Split 127.16.224.0/19 into 16 equal /23 subnets (510 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 127.16.224.0/23 | 127.16.224.0 | 127.16.224.1 | 127.16.225.254 | 127.16.225.255 | 510 |
| 2 | 127.16.226.0/23 | 127.16.226.0 | 127.16.226.1 | 127.16.227.254 | 127.16.227.255 | 510 |
| 3 | 127.16.228.0/23 | 127.16.228.0 | 127.16.228.1 | 127.16.229.254 | 127.16.229.255 | 510 |
| 4 | 127.16.230.0/23 | 127.16.230.0 | 127.16.230.1 | 127.16.231.254 | 127.16.231.255 | 510 |
| 5 | 127.16.232.0/23 | 127.16.232.0 | 127.16.232.1 | 127.16.233.254 | 127.16.233.255 | 510 |
| 6 | 127.16.234.0/23 | 127.16.234.0 | 127.16.234.1 | 127.16.235.254 | 127.16.235.255 | 510 |
| 7 | 127.16.236.0/23 | 127.16.236.0 | 127.16.236.1 | 127.16.237.254 | 127.16.237.255 | 510 |
| 8 | 127.16.238.0/23 | 127.16.238.0 | 127.16.238.1 | 127.16.239.254 | 127.16.239.255 | 510 |
| 9 | 127.16.240.0/23 | 127.16.240.0 | 127.16.240.1 | 127.16.241.254 | 127.16.241.255 | 510 |
| 10 | 127.16.242.0/23 | 127.16.242.0 | 127.16.242.1 | 127.16.243.254 | 127.16.243.255 | 510 |
| 11 | 127.16.244.0/23 | 127.16.244.0 | 127.16.244.1 | 127.16.245.254 | 127.16.245.255 | 510 |
| 12 | 127.16.246.0/23 | 127.16.246.0 | 127.16.246.1 | 127.16.247.254 | 127.16.247.255 | 510 |
| 13 | 127.16.248.0/23 | 127.16.248.0 | 127.16.248.1 | 127.16.249.254 | 127.16.249.255 | 510 |
| 14 | 127.16.250.0/23 | 127.16.250.0 | 127.16.250.1 | 127.16.251.254 | 127.16.251.255 | 510 |
| 15 | 127.16.252.0/23 | 127.16.252.0 | 127.16.252.1 | 127.16.253.254 | 127.16.253.255 | 510 |
| 16 | 127.16.254.0/23 | 127.16.254.0 | 127.16.254.1 | 127.16.255.254 | 127.16.255.255 | 510 |