178.83.3.0/25

Public

Class B — /25 prefix — 126 usable hosts

Network Address

178.83.3.0

Broadcast Address

178.83.3.127

Subnet Mask

255.255.255.128

Usable Hosts

126

First Usable IP

178.83.3.1

Last Usable IP

178.83.3.126

Total IPs

128

Prefix Length

/25

Network address — the base address of the block (178.83.3.0). All devices in this subnet share this prefix. Cannot be assigned to a host.

Broadcast address — packets sent to 178.83.3.127 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	178.83.3.0/25
Network Address	178.83.3.0
Broadcast Address	178.83.3.127
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	178.83.3.1
Last Usable IP	178.83.3.126
Network (Hex)	0xB2530300
Broadcast (Hex)	0xB253037F
Address Type	Public / Globally Routable

Binary Representation

Network Address

10110010.01010011.00000011 10110010.01010011.00000011.00000000

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 178.83.3.0/25 into 2 equal /26 subnets (62 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	178.83.3.0/26	178.83.3.0	178.83.3.1	178.83.3.62	178.83.3.63	62
2	178.83.3.64/26	178.83.3.64	178.83.3.65	178.83.3.126	178.83.3.127	62

Split 178.83.3.0/25 into 4 equal /27 subnets (30 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	178.83.3.0/27	178.83.3.0	178.83.3.1	178.83.3.30	178.83.3.31	30
2	178.83.3.32/27	178.83.3.32	178.83.3.33	178.83.3.62	178.83.3.63	30
3	178.83.3.64/27	178.83.3.64	178.83.3.65	178.83.3.94	178.83.3.95	30
4	178.83.3.96/27	178.83.3.96	178.83.3.97	178.83.3.126	178.83.3.127	30

Split 178.83.3.0/25 into 8 equal /28 subnets (14 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	178.83.3.0/28	178.83.3.0	178.83.3.1	178.83.3.14	178.83.3.15	14
2	178.83.3.16/28	178.83.3.16	178.83.3.17	178.83.3.30	178.83.3.31	14
3	178.83.3.32/28	178.83.3.32	178.83.3.33	178.83.3.46	178.83.3.47	14
4	178.83.3.48/28	178.83.3.48	178.83.3.49	178.83.3.62	178.83.3.63	14
5	178.83.3.64/28	178.83.3.64	178.83.3.65	178.83.3.78	178.83.3.79	14
6	178.83.3.80/28	178.83.3.80	178.83.3.81	178.83.3.94	178.83.3.95	14
7	178.83.3.96/28	178.83.3.96	178.83.3.97	178.83.3.110	178.83.3.111	14
8	178.83.3.112/28	178.83.3.112	178.83.3.113	178.83.3.126	178.83.3.127	14

Split 178.83.3.0/25 into 16 equal /29 subnets (6 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	178.83.3.0/29	178.83.3.0	178.83.3.1	178.83.3.6	178.83.3.7	6
2	178.83.3.8/29	178.83.3.8	178.83.3.9	178.83.3.14	178.83.3.15	6
3	178.83.3.16/29	178.83.3.16	178.83.3.17	178.83.3.22	178.83.3.23	6
4	178.83.3.24/29	178.83.3.24	178.83.3.25	178.83.3.30	178.83.3.31	6
5	178.83.3.32/29	178.83.3.32	178.83.3.33	178.83.3.38	178.83.3.39	6
6	178.83.3.40/29	178.83.3.40	178.83.3.41	178.83.3.46	178.83.3.47	6
7	178.83.3.48/29	178.83.3.48	178.83.3.49	178.83.3.54	178.83.3.55	6
8	178.83.3.56/29	178.83.3.56	178.83.3.57	178.83.3.62	178.83.3.63	6
9	178.83.3.64/29	178.83.3.64	178.83.3.65	178.83.3.70	178.83.3.71	6
10	178.83.3.72/29	178.83.3.72	178.83.3.73	178.83.3.78	178.83.3.79	6
11	178.83.3.80/29	178.83.3.80	178.83.3.81	178.83.3.86	178.83.3.87	6
12	178.83.3.88/29	178.83.3.88	178.83.3.89	178.83.3.94	178.83.3.95	6
13	178.83.3.96/29	178.83.3.96	178.83.3.97	178.83.3.102	178.83.3.103	6
14	178.83.3.104/29	178.83.3.104	178.83.3.105	178.83.3.110	178.83.3.111	6
15	178.83.3.112/29	178.83.3.112	178.83.3.113	178.83.3.118	178.83.3.119	6
16	178.83.3.120/29	178.83.3.120	178.83.3.121	178.83.3.126	178.83.3.127	6

IP Address Sample

Showing first 16 of 128 total IPs.

178.83.3.0 net

178.83.3.1

178.83.3.2

178.83.3.3

178.83.3.4

178.83.3.5

178.83.3.6

178.83.3.7

178.83.3.8

178.83.3.9

178.83.3.10

178.83.3.11

178.83.3.12

178.83.3.13

178.83.3.14

178.83.3.15

… 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 178.83.3.0/24 Sibling /25 block 178.83.3.128/25

Adjacent Prefix Sizes

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