151.4.83.0/25

Public

Class B — /25 prefix — 126 usable hosts

Network Address

151.4.83.0

Broadcast Address

151.4.83.127

Subnet Mask

255.255.255.128

Usable Hosts

126

First Usable IP

151.4.83.1

Last Usable IP

151.4.83.126

Total IPs

128

Prefix Length

/25

Network address — the base address of the block (151.4.83.0). All devices in this subnet share this prefix. Cannot be assigned to a host.

Broadcast address — packets sent to 151.4.83.127 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	151.4.83.0/25
Network Address	151.4.83.0
Broadcast Address	151.4.83.127
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	151.4.83.1
Last Usable IP	151.4.83.126
Network (Hex)	0x97045300
Broadcast (Hex)	0x9704537F
Address Type	Public / Globally Routable

Binary Representation

Network Address

10010111.00000100.01010011 10010111.00000100.01010011.00000000

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 151.4.83.0/25 into 2 equal /26 subnets (62 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	151.4.83.0/26	151.4.83.0	151.4.83.1	151.4.83.62	151.4.83.63	62
2	151.4.83.64/26	151.4.83.64	151.4.83.65	151.4.83.126	151.4.83.127	62

Split 151.4.83.0/25 into 4 equal /27 subnets (30 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	151.4.83.0/27	151.4.83.0	151.4.83.1	151.4.83.30	151.4.83.31	30
2	151.4.83.32/27	151.4.83.32	151.4.83.33	151.4.83.62	151.4.83.63	30
3	151.4.83.64/27	151.4.83.64	151.4.83.65	151.4.83.94	151.4.83.95	30
4	151.4.83.96/27	151.4.83.96	151.4.83.97	151.4.83.126	151.4.83.127	30

Split 151.4.83.0/25 into 8 equal /28 subnets (14 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	151.4.83.0/28	151.4.83.0	151.4.83.1	151.4.83.14	151.4.83.15	14
2	151.4.83.16/28	151.4.83.16	151.4.83.17	151.4.83.30	151.4.83.31	14
3	151.4.83.32/28	151.4.83.32	151.4.83.33	151.4.83.46	151.4.83.47	14
4	151.4.83.48/28	151.4.83.48	151.4.83.49	151.4.83.62	151.4.83.63	14
5	151.4.83.64/28	151.4.83.64	151.4.83.65	151.4.83.78	151.4.83.79	14
6	151.4.83.80/28	151.4.83.80	151.4.83.81	151.4.83.94	151.4.83.95	14
7	151.4.83.96/28	151.4.83.96	151.4.83.97	151.4.83.110	151.4.83.111	14
8	151.4.83.112/28	151.4.83.112	151.4.83.113	151.4.83.126	151.4.83.127	14

Split 151.4.83.0/25 into 16 equal /29 subnets (6 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	151.4.83.0/29	151.4.83.0	151.4.83.1	151.4.83.6	151.4.83.7	6
2	151.4.83.8/29	151.4.83.8	151.4.83.9	151.4.83.14	151.4.83.15	6
3	151.4.83.16/29	151.4.83.16	151.4.83.17	151.4.83.22	151.4.83.23	6
4	151.4.83.24/29	151.4.83.24	151.4.83.25	151.4.83.30	151.4.83.31	6
5	151.4.83.32/29	151.4.83.32	151.4.83.33	151.4.83.38	151.4.83.39	6
6	151.4.83.40/29	151.4.83.40	151.4.83.41	151.4.83.46	151.4.83.47	6
7	151.4.83.48/29	151.4.83.48	151.4.83.49	151.4.83.54	151.4.83.55	6
8	151.4.83.56/29	151.4.83.56	151.4.83.57	151.4.83.62	151.4.83.63	6
9	151.4.83.64/29	151.4.83.64	151.4.83.65	151.4.83.70	151.4.83.71	6
10	151.4.83.72/29	151.4.83.72	151.4.83.73	151.4.83.78	151.4.83.79	6
11	151.4.83.80/29	151.4.83.80	151.4.83.81	151.4.83.86	151.4.83.87	6
12	151.4.83.88/29	151.4.83.88	151.4.83.89	151.4.83.94	151.4.83.95	6
13	151.4.83.96/29	151.4.83.96	151.4.83.97	151.4.83.102	151.4.83.103	6
14	151.4.83.104/29	151.4.83.104	151.4.83.105	151.4.83.110	151.4.83.111	6
15	151.4.83.112/29	151.4.83.112	151.4.83.113	151.4.83.118	151.4.83.119	6
16	151.4.83.120/29	151.4.83.120	151.4.83.121	151.4.83.126	151.4.83.127	6

IP Address Sample

Showing first 16 of 128 total IPs.

151.4.83.0 net

151.4.83.1

151.4.83.2

151.4.83.3

151.4.83.4

151.4.83.5

151.4.83.6

151.4.83.7

151.4.83.8

151.4.83.9

151.4.83.10

151.4.83.11

151.4.83.12

151.4.83.13

151.4.83.14

151.4.83.15

… 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 151.4.83.0/24 Sibling /25 block 151.4.83.128/25

Adjacent Prefix Sizes

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