178.3.83.0/25

Public

Class B — /25 prefix — 126 usable hosts

Network Address

178.3.83.0

Broadcast Address

178.3.83.127

Subnet Mask

255.255.255.128

Usable Hosts

126

First Usable IP

178.3.83.1

Last Usable IP

178.3.83.126

Total IPs

128

Prefix Length

/25

Network address — the base address of the block (178.3.83.0). All devices in this subnet share this prefix. Cannot be assigned to a host.

Broadcast address — packets sent to 178.3.83.127 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	178.3.83.0/25
Network Address	178.3.83.0
Broadcast Address	178.3.83.127
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	178.3.83.1
Last Usable IP	178.3.83.126
Network (Hex)	0xB2035300
Broadcast (Hex)	0xB203537F
Address Type	Public / Globally Routable

Binary Representation

Network Address

10110010.00000011.01010011 10110010.00000011.01010011.00000000

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 178.3.83.0/25 into 2 equal /26 subnets (62 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	178.3.83.0/26	178.3.83.0	178.3.83.1	178.3.83.62	178.3.83.63	62
2	178.3.83.64/26	178.3.83.64	178.3.83.65	178.3.83.126	178.3.83.127	62

Split 178.3.83.0/25 into 4 equal /27 subnets (30 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	178.3.83.0/27	178.3.83.0	178.3.83.1	178.3.83.30	178.3.83.31	30
2	178.3.83.32/27	178.3.83.32	178.3.83.33	178.3.83.62	178.3.83.63	30
3	178.3.83.64/27	178.3.83.64	178.3.83.65	178.3.83.94	178.3.83.95	30
4	178.3.83.96/27	178.3.83.96	178.3.83.97	178.3.83.126	178.3.83.127	30

Split 178.3.83.0/25 into 8 equal /28 subnets (14 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	178.3.83.0/28	178.3.83.0	178.3.83.1	178.3.83.14	178.3.83.15	14
2	178.3.83.16/28	178.3.83.16	178.3.83.17	178.3.83.30	178.3.83.31	14
3	178.3.83.32/28	178.3.83.32	178.3.83.33	178.3.83.46	178.3.83.47	14
4	178.3.83.48/28	178.3.83.48	178.3.83.49	178.3.83.62	178.3.83.63	14
5	178.3.83.64/28	178.3.83.64	178.3.83.65	178.3.83.78	178.3.83.79	14
6	178.3.83.80/28	178.3.83.80	178.3.83.81	178.3.83.94	178.3.83.95	14
7	178.3.83.96/28	178.3.83.96	178.3.83.97	178.3.83.110	178.3.83.111	14
8	178.3.83.112/28	178.3.83.112	178.3.83.113	178.3.83.126	178.3.83.127	14

Split 178.3.83.0/25 into 16 equal /29 subnets (6 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	178.3.83.0/29	178.3.83.0	178.3.83.1	178.3.83.6	178.3.83.7	6
2	178.3.83.8/29	178.3.83.8	178.3.83.9	178.3.83.14	178.3.83.15	6
3	178.3.83.16/29	178.3.83.16	178.3.83.17	178.3.83.22	178.3.83.23	6
4	178.3.83.24/29	178.3.83.24	178.3.83.25	178.3.83.30	178.3.83.31	6
5	178.3.83.32/29	178.3.83.32	178.3.83.33	178.3.83.38	178.3.83.39	6
6	178.3.83.40/29	178.3.83.40	178.3.83.41	178.3.83.46	178.3.83.47	6
7	178.3.83.48/29	178.3.83.48	178.3.83.49	178.3.83.54	178.3.83.55	6
8	178.3.83.56/29	178.3.83.56	178.3.83.57	178.3.83.62	178.3.83.63	6
9	178.3.83.64/29	178.3.83.64	178.3.83.65	178.3.83.70	178.3.83.71	6
10	178.3.83.72/29	178.3.83.72	178.3.83.73	178.3.83.78	178.3.83.79	6
11	178.3.83.80/29	178.3.83.80	178.3.83.81	178.3.83.86	178.3.83.87	6
12	178.3.83.88/29	178.3.83.88	178.3.83.89	178.3.83.94	178.3.83.95	6
13	178.3.83.96/29	178.3.83.96	178.3.83.97	178.3.83.102	178.3.83.103	6
14	178.3.83.104/29	178.3.83.104	178.3.83.105	178.3.83.110	178.3.83.111	6
15	178.3.83.112/29	178.3.83.112	178.3.83.113	178.3.83.118	178.3.83.119	6
16	178.3.83.120/29	178.3.83.120	178.3.83.121	178.3.83.126	178.3.83.127	6

IP Address Sample

Showing first 16 of 128 total IPs.

178.3.83.0 net

178.3.83.1

178.3.83.2

178.3.83.3

178.3.83.4

178.3.83.5

178.3.83.6

178.3.83.7

178.3.83.8

178.3.83.9

178.3.83.10

178.3.83.11

178.3.83.12

178.3.83.13

178.3.83.14

178.3.83.15

… 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 178.3.83.0/24 Sibling /25 block 178.3.83.128/25

Adjacent Prefix Sizes

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