18.162.128.0/19

Public

Class A — /19 prefix — 8,190 usable hosts

Network Address

18.162.128.0

Broadcast Address

18.162.159.255

Subnet Mask

255.255.224.0

Usable Hosts

8,190

First Usable IP

18.162.128.1

Last Usable IP

18.162.159.254

Total IPs

8,192

Prefix Length

/19

Network address — the base address of the block (18.162.128.0). All devices in this subnet share this prefix. Cannot be assigned to a host.

Broadcast address — packets sent to 18.162.159.255 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	18.162.128.0/19
Network Address	18.162.128.0
Broadcast Address	18.162.159.255
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	18.162.128.1
Last Usable IP	18.162.159.254
Network (Hex)	0x12A28000
Broadcast (Hex)	0x12A29FFF
Address Type	Public / Globally Routable

Binary Representation

Network Address

00010010.10100010 00010010.10100010.10000000.00000000

Subnet Mask

11111111.11111111.11100000.00000000

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 18.162.128.0/19 into 2 equal /20 subnets (4,094 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	18.162.128.0/20	18.162.128.0	18.162.128.1	18.162.143.254	18.162.143.255	4,094
2	18.162.144.0/20	18.162.144.0	18.162.144.1	18.162.159.254	18.162.159.255	4,094

Split 18.162.128.0/19 into 4 equal /21 subnets (2,046 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	18.162.128.0/21	18.162.128.0	18.162.128.1	18.162.135.254	18.162.135.255	2,046
2	18.162.136.0/21	18.162.136.0	18.162.136.1	18.162.143.254	18.162.143.255	2,046
3	18.162.144.0/21	18.162.144.0	18.162.144.1	18.162.151.254	18.162.151.255	2,046
4	18.162.152.0/21	18.162.152.0	18.162.152.1	18.162.159.254	18.162.159.255	2,046

Split 18.162.128.0/19 into 8 equal /22 subnets (1,022 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	18.162.128.0/22	18.162.128.0	18.162.128.1	18.162.131.254	18.162.131.255	1,022
2	18.162.132.0/22	18.162.132.0	18.162.132.1	18.162.135.254	18.162.135.255	1,022
3	18.162.136.0/22	18.162.136.0	18.162.136.1	18.162.139.254	18.162.139.255	1,022
4	18.162.140.0/22	18.162.140.0	18.162.140.1	18.162.143.254	18.162.143.255	1,022
5	18.162.144.0/22	18.162.144.0	18.162.144.1	18.162.147.254	18.162.147.255	1,022
6	18.162.148.0/22	18.162.148.0	18.162.148.1	18.162.151.254	18.162.151.255	1,022
7	18.162.152.0/22	18.162.152.0	18.162.152.1	18.162.155.254	18.162.155.255	1,022
8	18.162.156.0/22	18.162.156.0	18.162.156.1	18.162.159.254	18.162.159.255	1,022

Split 18.162.128.0/19 into 16 equal /23 subnets (510 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	18.162.128.0/23	18.162.128.0	18.162.128.1	18.162.129.254	18.162.129.255	510
2	18.162.130.0/23	18.162.130.0	18.162.130.1	18.162.131.254	18.162.131.255	510
3	18.162.132.0/23	18.162.132.0	18.162.132.1	18.162.133.254	18.162.133.255	510
4	18.162.134.0/23	18.162.134.0	18.162.134.1	18.162.135.254	18.162.135.255	510
5	18.162.136.0/23	18.162.136.0	18.162.136.1	18.162.137.254	18.162.137.255	510
6	18.162.138.0/23	18.162.138.0	18.162.138.1	18.162.139.254	18.162.139.255	510
7	18.162.140.0/23	18.162.140.0	18.162.140.1	18.162.141.254	18.162.141.255	510
8	18.162.142.0/23	18.162.142.0	18.162.142.1	18.162.143.254	18.162.143.255	510
9	18.162.144.0/23	18.162.144.0	18.162.144.1	18.162.145.254	18.162.145.255	510
10	18.162.146.0/23	18.162.146.0	18.162.146.1	18.162.147.254	18.162.147.255	510
11	18.162.148.0/23	18.162.148.0	18.162.148.1	18.162.149.254	18.162.149.255	510
12	18.162.150.0/23	18.162.150.0	18.162.150.1	18.162.151.254	18.162.151.255	510
13	18.162.152.0/23	18.162.152.0	18.162.152.1	18.162.153.254	18.162.153.255	510
14	18.162.154.0/23	18.162.154.0	18.162.154.1	18.162.155.254	18.162.155.255	510
15	18.162.156.0/23	18.162.156.0	18.162.156.1	18.162.157.254	18.162.157.255	510
16	18.162.158.0/23	18.162.158.0	18.162.158.1	18.162.159.254	18.162.159.255	510

/19 Subnet Reference

Total IPs 8,192

Usable Hosts 8,190

Subnet Mask 255.255.224.0

Wildcard 0.0.31.255

Full /19 reference →

Related Ranges

Parent /18 block 18.162.128.0/18 Sibling /19 block 18.162.160.0/19

Adjacent Prefix Sizes

/17 32,766 hosts /18 16,382 hosts /19 8,190 hosts /20 4,094 hosts /21 2,046 hosts