SubnetPad

/19 Subnet Calculator

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A /19 block contains 8,192 addresses with 8,190 usable. Often used for cloud availability zone subnets and medium enterprise segments.

/1
/32

/19 = mask 255.255.224.0 • 8,190 usable addresses

Results for 192.168.0.0/19

Private (RFC 1918)Class C
Network addressThe first address — identifies the subnet itself
Broadcast addressThe last address — used to reach every device at once
Subnet maskSame as /19 in CIDR notation
First usable hostThe first IP you can assign to a device
Last usable hostThe last IP you can assign to a device
Usable hosts8,192 total addresses in this subnet
More detailsNeighboring subnets, wildcard mask, hex, reverse DNS, and binary breakdown

Neighboring /19 subnets

Wildcard mask
Used in Cisco ACLs and OSPF
CIDR notation
IP in hexadecimal
IP as 32-bit integer
Reverse DNS (PTR)
Host bits / subnet bits

Binary breakdown

IP address11000000.10101000.00000000.00000000
Subnet mask11111111.11111111.11100000.00000000
Network11000000.10101000.00000000.00000000
Broadcast11000000.10101000.00011111.11111111

Quick facts for /19

/19 reference guideBit split, overview, sizing tables, notable networks, and FAQ

Binary bit split

Network bits (19)Host bits (13)
Network bits
19
Host bits
13
Subnet mask
255.255.224.0
Wildcard mask
0.0.31.255
Total addresses
8,192
Usable hosts
8,190
Hosts formula
2^13 − 2
/24 relationship
32 × /24 networks

Overview

A /19 block contains 8,192 addresses with 8,190 usable. Often used for cloud availability zone subnets and medium enterprise segments.

Common use cases

  • Cloud availability zone subnets
  • Medium enterprise segment allocation
  • ISP DSL/broadband subscriber pools

Subnet sizing reference

Divide /19 into…

PrefixSubnetsHosts each
/2024,094
/2142,046
/2281,022
/2316510

/19 fits inside…

SupernetHosts/19s inside
/1816,3822
/1732,7664
/1665,5348
/15131,07016

Frequently asked questions

Common questions about /19 networks, subnet masks, and use cases.

All CIDR prefix sizes

/0/1/2/3/4/5/6/7/8/9/10/11/12/13/14/15/16/17/18/19/20/21/22/23/24/25/26/27/28/29/30/31/32