39.2.23.0/25

Public

Class A — /25 prefix — 126 usable hosts

Network Address

39.2.23.0

Broadcast Address

39.2.23.127

Subnet Mask

255.255.255.128

Usable Hosts

126

First Usable IP

39.2.23.1

Last Usable IP

39.2.23.126

Total IPs

128

Prefix Length

/25

Network address — the base address of the block (39.2.23.0). All devices in this subnet share this prefix. Cannot be assigned to a host.

Broadcast address — packets sent to 39.2.23.127 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	39.2.23.0/25
Network Address	39.2.23.0
Broadcast Address	39.2.23.127
Subnet Mask	255.255.255.128
Wildcard Mask	0.0.0.127
Prefix Length	/25
IP Address Class	Class A
Total IP Addresses	128
Usable Host Addresses	126
First Usable IP	39.2.23.1
Last Usable IP	39.2.23.126
Network (Hex)	0x27021700
Broadcast (Hex)	0x2702177F
Address Type	Public / Globally Routable

Binary Representation

Network Address

00100111.00000010.00010111 00100111.00000010.00010111.00000000

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 39.2.23.0/25 into 2 equal /26 subnets (62 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	39.2.23.0/26	39.2.23.0	39.2.23.1	39.2.23.62	39.2.23.63	62
2	39.2.23.64/26	39.2.23.64	39.2.23.65	39.2.23.126	39.2.23.127	62

Split 39.2.23.0/25 into 4 equal /27 subnets (30 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	39.2.23.0/27	39.2.23.0	39.2.23.1	39.2.23.30	39.2.23.31	30
2	39.2.23.32/27	39.2.23.32	39.2.23.33	39.2.23.62	39.2.23.63	30
3	39.2.23.64/27	39.2.23.64	39.2.23.65	39.2.23.94	39.2.23.95	30
4	39.2.23.96/27	39.2.23.96	39.2.23.97	39.2.23.126	39.2.23.127	30

Split 39.2.23.0/25 into 8 equal /28 subnets (14 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	39.2.23.0/28	39.2.23.0	39.2.23.1	39.2.23.14	39.2.23.15	14
2	39.2.23.16/28	39.2.23.16	39.2.23.17	39.2.23.30	39.2.23.31	14
3	39.2.23.32/28	39.2.23.32	39.2.23.33	39.2.23.46	39.2.23.47	14
4	39.2.23.48/28	39.2.23.48	39.2.23.49	39.2.23.62	39.2.23.63	14
5	39.2.23.64/28	39.2.23.64	39.2.23.65	39.2.23.78	39.2.23.79	14
6	39.2.23.80/28	39.2.23.80	39.2.23.81	39.2.23.94	39.2.23.95	14
7	39.2.23.96/28	39.2.23.96	39.2.23.97	39.2.23.110	39.2.23.111	14
8	39.2.23.112/28	39.2.23.112	39.2.23.113	39.2.23.126	39.2.23.127	14

Split 39.2.23.0/25 into 16 equal /29 subnets (6 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	39.2.23.0/29	39.2.23.0	39.2.23.1	39.2.23.6	39.2.23.7	6
2	39.2.23.8/29	39.2.23.8	39.2.23.9	39.2.23.14	39.2.23.15	6
3	39.2.23.16/29	39.2.23.16	39.2.23.17	39.2.23.22	39.2.23.23	6
4	39.2.23.24/29	39.2.23.24	39.2.23.25	39.2.23.30	39.2.23.31	6
5	39.2.23.32/29	39.2.23.32	39.2.23.33	39.2.23.38	39.2.23.39	6
6	39.2.23.40/29	39.2.23.40	39.2.23.41	39.2.23.46	39.2.23.47	6
7	39.2.23.48/29	39.2.23.48	39.2.23.49	39.2.23.54	39.2.23.55	6
8	39.2.23.56/29	39.2.23.56	39.2.23.57	39.2.23.62	39.2.23.63	6
9	39.2.23.64/29	39.2.23.64	39.2.23.65	39.2.23.70	39.2.23.71	6
10	39.2.23.72/29	39.2.23.72	39.2.23.73	39.2.23.78	39.2.23.79	6
11	39.2.23.80/29	39.2.23.80	39.2.23.81	39.2.23.86	39.2.23.87	6
12	39.2.23.88/29	39.2.23.88	39.2.23.89	39.2.23.94	39.2.23.95	6
13	39.2.23.96/29	39.2.23.96	39.2.23.97	39.2.23.102	39.2.23.103	6
14	39.2.23.104/29	39.2.23.104	39.2.23.105	39.2.23.110	39.2.23.111	6
15	39.2.23.112/29	39.2.23.112	39.2.23.113	39.2.23.118	39.2.23.119	6
16	39.2.23.120/29	39.2.23.120	39.2.23.121	39.2.23.126	39.2.23.127	6

IP Address Sample

Showing first 16 of 128 total IPs.

39.2.23.0 net

39.2.23.1

39.2.23.2

39.2.23.3

39.2.23.4

39.2.23.5

39.2.23.6

39.2.23.7

39.2.23.8

39.2.23.9

39.2.23.10

39.2.23.11

39.2.23.12

39.2.23.13

39.2.23.14

39.2.23.15

… 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 39.2.23.0/24 Sibling /25 block 39.2.23.128/25

Adjacent Prefix Sizes

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