243.181.160.0/19
PublicClass E (Reserved) — /19 prefix — 8,190 usable hosts
Network address — the base address of the block (243.181.160.0). All devices in this subnet share this prefix. Cannot be assigned to a host.
Broadcast address — packets sent to 243.181.191.255 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 | 243.181.160.0/19 |
| Network Address | 243.181.160.0 |
| Broadcast Address | 243.181.191.255 |
| Subnet Mask | 255.255.224.0 |
| Wildcard Mask | 0.0.31.255 |
| Prefix Length | /19 |
| IP Address Class | Class E (Reserved) |
| Total IP Addresses | 8,192 |
| Usable Host Addresses | 8,190 |
| First Usable IP | 243.181.160.1 |
| Last Usable IP | 243.181.191.254 |
| Network (Hex) | 0xF3B5A000 |
| Broadcast (Hex) | 0xF3B5BFFF |
| 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 243.181.160.0/19 into 2 equal /20 subnets (4,094 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 243.181.160.0/20 | 243.181.160.0 | 243.181.160.1 | 243.181.175.254 | 243.181.175.255 | 4,094 |
| 2 | 243.181.176.0/20 | 243.181.176.0 | 243.181.176.1 | 243.181.191.254 | 243.181.191.255 | 4,094 |
Split 243.181.160.0/19 into 4 equal /21 subnets (2,046 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 243.181.160.0/21 | 243.181.160.0 | 243.181.160.1 | 243.181.167.254 | 243.181.167.255 | 2,046 |
| 2 | 243.181.168.0/21 | 243.181.168.0 | 243.181.168.1 | 243.181.175.254 | 243.181.175.255 | 2,046 |
| 3 | 243.181.176.0/21 | 243.181.176.0 | 243.181.176.1 | 243.181.183.254 | 243.181.183.255 | 2,046 |
| 4 | 243.181.184.0/21 | 243.181.184.0 | 243.181.184.1 | 243.181.191.254 | 243.181.191.255 | 2,046 |
Split 243.181.160.0/19 into 8 equal /22 subnets (1,022 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 243.181.160.0/22 | 243.181.160.0 | 243.181.160.1 | 243.181.163.254 | 243.181.163.255 | 1,022 |
| 2 | 243.181.164.0/22 | 243.181.164.0 | 243.181.164.1 | 243.181.167.254 | 243.181.167.255 | 1,022 |
| 3 | 243.181.168.0/22 | 243.181.168.0 | 243.181.168.1 | 243.181.171.254 | 243.181.171.255 | 1,022 |
| 4 | 243.181.172.0/22 | 243.181.172.0 | 243.181.172.1 | 243.181.175.254 | 243.181.175.255 | 1,022 |
| 5 | 243.181.176.0/22 | 243.181.176.0 | 243.181.176.1 | 243.181.179.254 | 243.181.179.255 | 1,022 |
| 6 | 243.181.180.0/22 | 243.181.180.0 | 243.181.180.1 | 243.181.183.254 | 243.181.183.255 | 1,022 |
| 7 | 243.181.184.0/22 | 243.181.184.0 | 243.181.184.1 | 243.181.187.254 | 243.181.187.255 | 1,022 |
| 8 | 243.181.188.0/22 | 243.181.188.0 | 243.181.188.1 | 243.181.191.254 | 243.181.191.255 | 1,022 |
Split 243.181.160.0/19 into 16 equal /23 subnets (510 usable hosts each).
| # | CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|---|
| 1 | 243.181.160.0/23 | 243.181.160.0 | 243.181.160.1 | 243.181.161.254 | 243.181.161.255 | 510 |
| 2 | 243.181.162.0/23 | 243.181.162.0 | 243.181.162.1 | 243.181.163.254 | 243.181.163.255 | 510 |
| 3 | 243.181.164.0/23 | 243.181.164.0 | 243.181.164.1 | 243.181.165.254 | 243.181.165.255 | 510 |
| 4 | 243.181.166.0/23 | 243.181.166.0 | 243.181.166.1 | 243.181.167.254 | 243.181.167.255 | 510 |
| 5 | 243.181.168.0/23 | 243.181.168.0 | 243.181.168.1 | 243.181.169.254 | 243.181.169.255 | 510 |
| 6 | 243.181.170.0/23 | 243.181.170.0 | 243.181.170.1 | 243.181.171.254 | 243.181.171.255 | 510 |
| 7 | 243.181.172.0/23 | 243.181.172.0 | 243.181.172.1 | 243.181.173.254 | 243.181.173.255 | 510 |
| 8 | 243.181.174.0/23 | 243.181.174.0 | 243.181.174.1 | 243.181.175.254 | 243.181.175.255 | 510 |
| 9 | 243.181.176.0/23 | 243.181.176.0 | 243.181.176.1 | 243.181.177.254 | 243.181.177.255 | 510 |
| 10 | 243.181.178.0/23 | 243.181.178.0 | 243.181.178.1 | 243.181.179.254 | 243.181.179.255 | 510 |
| 11 | 243.181.180.0/23 | 243.181.180.0 | 243.181.180.1 | 243.181.181.254 | 243.181.181.255 | 510 |
| 12 | 243.181.182.0/23 | 243.181.182.0 | 243.181.182.1 | 243.181.183.254 | 243.181.183.255 | 510 |
| 13 | 243.181.184.0/23 | 243.181.184.0 | 243.181.184.1 | 243.181.185.254 | 243.181.185.255 | 510 |
| 14 | 243.181.186.0/23 | 243.181.186.0 | 243.181.186.1 | 243.181.187.254 | 243.181.187.255 | 510 |
| 15 | 243.181.188.0/23 | 243.181.188.0 | 243.181.188.1 | 243.181.189.254 | 243.181.189.255 | 510 |
| 16 | 243.181.190.0/23 | 243.181.190.0 | 243.181.190.1 | 243.181.191.254 | 243.181.191.255 | 510 |