151.2.113.0/25

Public

Class B — /25 prefix — 126 usable hosts

Network Address

151.2.113.0

Broadcast Address

151.2.113.127

Subnet Mask

255.255.255.128

Usable Hosts

126

First Usable IP

151.2.113.1

Last Usable IP

151.2.113.126

Total IPs

128

Prefix Length

/25

Network address — the base address of the block (151.2.113.0). All devices in this subnet share this prefix. Cannot be assigned to a host.

Broadcast address — packets sent to 151.2.113.127 are delivered to every device in the subnet. Also reserved — not assignable.

Usable hosts — the 126 addresses between those two that you can assign to servers, VMs, or interfaces.

Subnet mask — 255.255.255.128 is the dotted-decimal equivalent of /25. Older tools and Cisco configs use this format instead of CIDR slash notation.

Full Details

CIDR Notation	151.2.113.0/25
Network Address	151.2.113.0
Broadcast Address	151.2.113.127
Subnet Mask	255.255.255.128
Wildcard Mask	0.0.0.127
Prefix Length	/25
IP Address Class	Class B
Total IP Addresses	128
Usable Host Addresses	126
First Usable IP	151.2.113.1
Last Usable IP	151.2.113.126
Network (Hex)	0x97027100
Broadcast (Hex)	0x9702717F
Address Type	Public / Globally Routable

Binary Representation

Network Address

10010111.00000010.01110001 10010111.00000010.01110001.00000000

Subnet Mask

11111111.11111111.11111111.10000000

The first 25 bits (1s in the mask) identify the network. The remaining 7 bits identify hosts within the network.

Split into Equal Subnets

Split 151.2.113.0/25 into 2 equal /26 subnets (62 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	151.2.113.0/26	151.2.113.0	151.2.113.1	151.2.113.62	151.2.113.63	62
2	151.2.113.64/26	151.2.113.64	151.2.113.65	151.2.113.126	151.2.113.127	62

Split 151.2.113.0/25 into 4 equal /27 subnets (30 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	151.2.113.0/27	151.2.113.0	151.2.113.1	151.2.113.30	151.2.113.31	30
2	151.2.113.32/27	151.2.113.32	151.2.113.33	151.2.113.62	151.2.113.63	30
3	151.2.113.64/27	151.2.113.64	151.2.113.65	151.2.113.94	151.2.113.95	30
4	151.2.113.96/27	151.2.113.96	151.2.113.97	151.2.113.126	151.2.113.127	30

Split 151.2.113.0/25 into 8 equal /28 subnets (14 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	151.2.113.0/28	151.2.113.0	151.2.113.1	151.2.113.14	151.2.113.15	14
2	151.2.113.16/28	151.2.113.16	151.2.113.17	151.2.113.30	151.2.113.31	14
3	151.2.113.32/28	151.2.113.32	151.2.113.33	151.2.113.46	151.2.113.47	14
4	151.2.113.48/28	151.2.113.48	151.2.113.49	151.2.113.62	151.2.113.63	14
5	151.2.113.64/28	151.2.113.64	151.2.113.65	151.2.113.78	151.2.113.79	14
6	151.2.113.80/28	151.2.113.80	151.2.113.81	151.2.113.94	151.2.113.95	14
7	151.2.113.96/28	151.2.113.96	151.2.113.97	151.2.113.110	151.2.113.111	14
8	151.2.113.112/28	151.2.113.112	151.2.113.113	151.2.113.126	151.2.113.127	14

Split 151.2.113.0/25 into 16 equal /29 subnets (6 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	151.2.113.0/29	151.2.113.0	151.2.113.1	151.2.113.6	151.2.113.7	6
2	151.2.113.8/29	151.2.113.8	151.2.113.9	151.2.113.14	151.2.113.15	6
3	151.2.113.16/29	151.2.113.16	151.2.113.17	151.2.113.22	151.2.113.23	6
4	151.2.113.24/29	151.2.113.24	151.2.113.25	151.2.113.30	151.2.113.31	6
5	151.2.113.32/29	151.2.113.32	151.2.113.33	151.2.113.38	151.2.113.39	6
6	151.2.113.40/29	151.2.113.40	151.2.113.41	151.2.113.46	151.2.113.47	6
7	151.2.113.48/29	151.2.113.48	151.2.113.49	151.2.113.54	151.2.113.55	6
8	151.2.113.56/29	151.2.113.56	151.2.113.57	151.2.113.62	151.2.113.63	6
9	151.2.113.64/29	151.2.113.64	151.2.113.65	151.2.113.70	151.2.113.71	6
10	151.2.113.72/29	151.2.113.72	151.2.113.73	151.2.113.78	151.2.113.79	6
11	151.2.113.80/29	151.2.113.80	151.2.113.81	151.2.113.86	151.2.113.87	6
12	151.2.113.88/29	151.2.113.88	151.2.113.89	151.2.113.94	151.2.113.95	6
13	151.2.113.96/29	151.2.113.96	151.2.113.97	151.2.113.102	151.2.113.103	6
14	151.2.113.104/29	151.2.113.104	151.2.113.105	151.2.113.110	151.2.113.111	6
15	151.2.113.112/29	151.2.113.112	151.2.113.113	151.2.113.118	151.2.113.119	6
16	151.2.113.120/29	151.2.113.120	151.2.113.121	151.2.113.126	151.2.113.127	6

IP Address Sample

Showing first 16 of 128 total IPs.

151.2.113.0 net

151.2.113.1

151.2.113.2

151.2.113.3

151.2.113.4

151.2.113.5

151.2.113.6

151.2.113.7

151.2.113.8

151.2.113.9

151.2.113.10

151.2.113.11

151.2.113.12

151.2.113.13

151.2.113.14

151.2.113.15

… 112 more IPs …

/25 Subnet Reference

Total IPs 128

Usable Hosts 126

Subnet Mask 255.255.255.128

Wildcard 0.0.0.127

Full /25 reference →

Related Ranges

Parent /24 block 151.2.113.0/24 Sibling /25 block 151.2.113.128/25

Adjacent Prefix Sizes

/23 510 hosts /24 254 hosts /25 126 hosts /26 62 hosts /27 30 hosts