28.2.4.128/26

Public

Class A — /26 prefix — 62 usable hosts

Network Address

28.2.4.128

Broadcast Address

28.2.4.191

Subnet Mask

255.255.255.192

Usable Hosts

First Usable IP

28.2.4.129

Last Usable IP

28.2.4.190

Total IPs

Prefix Length

/26

Network address — the base address of the block (28.2.4.128). All devices in this subnet share this prefix. Cannot be assigned to a host.

Broadcast address — packets sent to 28.2.4.191 are delivered to every device in the subnet. Also reserved — not assignable.

Usable hosts — the 62 addresses between those two that you can assign to servers, VMs, or interfaces.

Subnet mask — 255.255.255.192 is the dotted-decimal equivalent of /26. Older tools and Cisco configs use this format instead of CIDR slash notation.

Full Details

CIDR Notation	28.2.4.128/26
Network Address	28.2.4.128
Broadcast Address	28.2.4.191
Subnet Mask	255.255.255.192
Wildcard Mask	0.0.0.63
Prefix Length	/26
IP Address Class	Class A
Total IP Addresses	64
Usable Host Addresses	62
First Usable IP	28.2.4.129
Last Usable IP	28.2.4.190
Network (Hex)	0x1C020480
Broadcast (Hex)	0x1C0204BF
Address Type	Public / Globally Routable

Binary Representation

Network Address

00011100.00000010.00000100 00011100.00000010.00000100.10000000

Subnet Mask

11111111.11111111.11111111.11000000

The first 26 bits (1s in the mask) identify the network. The remaining 6 bits identify hosts within the network.

Split into Equal Subnets

Split 28.2.4.128/26 into 2 equal /27 subnets (30 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	28.2.4.128/27	28.2.4.128	28.2.4.129	28.2.4.158	28.2.4.159	30
2	28.2.4.160/27	28.2.4.160	28.2.4.161	28.2.4.190	28.2.4.191	30

Split 28.2.4.128/26 into 4 equal /28 subnets (14 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	28.2.4.128/28	28.2.4.128	28.2.4.129	28.2.4.142	28.2.4.143	14
2	28.2.4.144/28	28.2.4.144	28.2.4.145	28.2.4.158	28.2.4.159	14
3	28.2.4.160/28	28.2.4.160	28.2.4.161	28.2.4.174	28.2.4.175	14
4	28.2.4.176/28	28.2.4.176	28.2.4.177	28.2.4.190	28.2.4.191	14

Split 28.2.4.128/26 into 8 equal /29 subnets (6 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	28.2.4.128/29	28.2.4.128	28.2.4.129	28.2.4.134	28.2.4.135	6
2	28.2.4.136/29	28.2.4.136	28.2.4.137	28.2.4.142	28.2.4.143	6
3	28.2.4.144/29	28.2.4.144	28.2.4.145	28.2.4.150	28.2.4.151	6
4	28.2.4.152/29	28.2.4.152	28.2.4.153	28.2.4.158	28.2.4.159	6
5	28.2.4.160/29	28.2.4.160	28.2.4.161	28.2.4.166	28.2.4.167	6
6	28.2.4.168/29	28.2.4.168	28.2.4.169	28.2.4.174	28.2.4.175	6
7	28.2.4.176/29	28.2.4.176	28.2.4.177	28.2.4.182	28.2.4.183	6
8	28.2.4.184/29	28.2.4.184	28.2.4.185	28.2.4.190	28.2.4.191	6

Split 28.2.4.128/26 into 16 equal /30 subnets (2 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	28.2.4.128/30	28.2.4.128	28.2.4.129	28.2.4.130	28.2.4.131	2
2	28.2.4.132/30	28.2.4.132	28.2.4.133	28.2.4.134	28.2.4.135	2
3	28.2.4.136/30	28.2.4.136	28.2.4.137	28.2.4.138	28.2.4.139	2
4	28.2.4.140/30	28.2.4.140	28.2.4.141	28.2.4.142	28.2.4.143	2
5	28.2.4.144/30	28.2.4.144	28.2.4.145	28.2.4.146	28.2.4.147	2
6	28.2.4.148/30	28.2.4.148	28.2.4.149	28.2.4.150	28.2.4.151	2
7	28.2.4.152/30	28.2.4.152	28.2.4.153	28.2.4.154	28.2.4.155	2
8	28.2.4.156/30	28.2.4.156	28.2.4.157	28.2.4.158	28.2.4.159	2
9	28.2.4.160/30	28.2.4.160	28.2.4.161	28.2.4.162	28.2.4.163	2
10	28.2.4.164/30	28.2.4.164	28.2.4.165	28.2.4.166	28.2.4.167	2
11	28.2.4.168/30	28.2.4.168	28.2.4.169	28.2.4.170	28.2.4.171	2
12	28.2.4.172/30	28.2.4.172	28.2.4.173	28.2.4.174	28.2.4.175	2
13	28.2.4.176/30	28.2.4.176	28.2.4.177	28.2.4.178	28.2.4.179	2
14	28.2.4.180/30	28.2.4.180	28.2.4.181	28.2.4.182	28.2.4.183	2
15	28.2.4.184/30	28.2.4.184	28.2.4.185	28.2.4.186	28.2.4.187	2
16	28.2.4.188/30	28.2.4.188	28.2.4.189	28.2.4.190	28.2.4.191	2

IP Address Sample

Showing first 16 of 64 total IPs.

28.2.4.128 net

28.2.4.129

28.2.4.130

28.2.4.131

28.2.4.132

28.2.4.133

28.2.4.134

28.2.4.135

28.2.4.136

28.2.4.137

28.2.4.138

28.2.4.139

28.2.4.140

28.2.4.141

28.2.4.142

28.2.4.143

… 48 more IPs …

/26 Subnet Reference

Total IPs 64

Usable Hosts 62

Subnet Mask 255.255.255.192

Wildcard 0.0.0.63

Full /26 reference →

Related Ranges

Parent /25 block 28.2.4.128/25 Sibling /26 block 28.2.4.192/26

Adjacent Prefix Sizes

/24 254 hosts /25 126 hosts /26 62 hosts /27 30 hosts /28 14 hosts