151.2.9.128/26

Public

Class B — /26 prefix — 62 usable hosts

Network Address

151.2.9.128

Broadcast Address

151.2.9.191

Subnet Mask

255.255.255.192

Usable Hosts

First Usable IP

151.2.9.129

Last Usable IP

151.2.9.190

Total IPs

Prefix Length

/26

Network address — the base address of the block (151.2.9.128). All devices in this subnet share this prefix. Cannot be assigned to a host.

Broadcast address — packets sent to 151.2.9.191 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	151.2.9.128/26
Network Address	151.2.9.128
Broadcast Address	151.2.9.191
Subnet Mask	255.255.255.192
Wildcard Mask	0.0.0.63
Prefix Length	/26
IP Address Class	Class B
Total IP Addresses	64
Usable Host Addresses	62
First Usable IP	151.2.9.129
Last Usable IP	151.2.9.190
Network (Hex)	0x97020980
Broadcast (Hex)	0x970209BF
Address Type	Public / Globally Routable

Binary Representation

Network Address

10010111.00000010.00001001 10010111.00000010.00001001.10000000

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 151.2.9.128/26 into 2 equal /27 subnets (30 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	151.2.9.128/27	151.2.9.128	151.2.9.129	151.2.9.158	151.2.9.159	30
2	151.2.9.160/27	151.2.9.160	151.2.9.161	151.2.9.190	151.2.9.191	30

Split 151.2.9.128/26 into 4 equal /28 subnets (14 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	151.2.9.128/28	151.2.9.128	151.2.9.129	151.2.9.142	151.2.9.143	14
2	151.2.9.144/28	151.2.9.144	151.2.9.145	151.2.9.158	151.2.9.159	14
3	151.2.9.160/28	151.2.9.160	151.2.9.161	151.2.9.174	151.2.9.175	14
4	151.2.9.176/28	151.2.9.176	151.2.9.177	151.2.9.190	151.2.9.191	14

Split 151.2.9.128/26 into 8 equal /29 subnets (6 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	151.2.9.128/29	151.2.9.128	151.2.9.129	151.2.9.134	151.2.9.135	6
2	151.2.9.136/29	151.2.9.136	151.2.9.137	151.2.9.142	151.2.9.143	6
3	151.2.9.144/29	151.2.9.144	151.2.9.145	151.2.9.150	151.2.9.151	6
4	151.2.9.152/29	151.2.9.152	151.2.9.153	151.2.9.158	151.2.9.159	6
5	151.2.9.160/29	151.2.9.160	151.2.9.161	151.2.9.166	151.2.9.167	6
6	151.2.9.168/29	151.2.9.168	151.2.9.169	151.2.9.174	151.2.9.175	6
7	151.2.9.176/29	151.2.9.176	151.2.9.177	151.2.9.182	151.2.9.183	6
8	151.2.9.184/29	151.2.9.184	151.2.9.185	151.2.9.190	151.2.9.191	6

Split 151.2.9.128/26 into 16 equal /30 subnets (2 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	151.2.9.128/30	151.2.9.128	151.2.9.129	151.2.9.130	151.2.9.131	2
2	151.2.9.132/30	151.2.9.132	151.2.9.133	151.2.9.134	151.2.9.135	2
3	151.2.9.136/30	151.2.9.136	151.2.9.137	151.2.9.138	151.2.9.139	2
4	151.2.9.140/30	151.2.9.140	151.2.9.141	151.2.9.142	151.2.9.143	2
5	151.2.9.144/30	151.2.9.144	151.2.9.145	151.2.9.146	151.2.9.147	2
6	151.2.9.148/30	151.2.9.148	151.2.9.149	151.2.9.150	151.2.9.151	2
7	151.2.9.152/30	151.2.9.152	151.2.9.153	151.2.9.154	151.2.9.155	2
8	151.2.9.156/30	151.2.9.156	151.2.9.157	151.2.9.158	151.2.9.159	2
9	151.2.9.160/30	151.2.9.160	151.2.9.161	151.2.9.162	151.2.9.163	2
10	151.2.9.164/30	151.2.9.164	151.2.9.165	151.2.9.166	151.2.9.167	2
11	151.2.9.168/30	151.2.9.168	151.2.9.169	151.2.9.170	151.2.9.171	2
12	151.2.9.172/30	151.2.9.172	151.2.9.173	151.2.9.174	151.2.9.175	2
13	151.2.9.176/30	151.2.9.176	151.2.9.177	151.2.9.178	151.2.9.179	2
14	151.2.9.180/30	151.2.9.180	151.2.9.181	151.2.9.182	151.2.9.183	2
15	151.2.9.184/30	151.2.9.184	151.2.9.185	151.2.9.186	151.2.9.187	2
16	151.2.9.188/30	151.2.9.188	151.2.9.189	151.2.9.190	151.2.9.191	2

IP Address Sample

Showing first 16 of 64 total IPs.

151.2.9.128 net

151.2.9.129

151.2.9.130

151.2.9.131

151.2.9.132

151.2.9.133

151.2.9.134

151.2.9.135

151.2.9.136

151.2.9.137

151.2.9.138

151.2.9.139

151.2.9.140

151.2.9.141

151.2.9.142

151.2.9.143

… 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 151.2.9.128/25 Sibling /26 block 151.2.9.192/26

Adjacent Prefix Sizes

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