42.237.5.128/25

Public

Class A — /25 prefix — 126 usable hosts

Network Address

42.237.5.128

Broadcast Address

42.237.5.255

Subnet Mask

255.255.255.128

Usable Hosts

126

First Usable IP

42.237.5.129

Last Usable IP

42.237.5.254

Total IPs

128

Prefix Length

/25

Network address — the base address of the block (42.237.5.128). All devices in this subnet share this prefix. Cannot be assigned to a host.

Broadcast address — packets sent to 42.237.5.255 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	42.237.5.128/25
Network Address	42.237.5.128
Broadcast Address	42.237.5.255
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	42.237.5.129
Last Usable IP	42.237.5.254
Network (Hex)	0x2AED0580
Broadcast (Hex)	0x2AED05FF
Address Type	Public / Globally Routable

Binary Representation

Network Address

00101010.11101101.00000101 00101010.11101101.00000101.10000000

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 42.237.5.128/25 into 2 equal /26 subnets (62 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	42.237.5.128/26	42.237.5.128	42.237.5.129	42.237.5.190	42.237.5.191	62
2	42.237.5.192/26	42.237.5.192	42.237.5.193	42.237.5.254	42.237.5.255	62

Split 42.237.5.128/25 into 4 equal /27 subnets (30 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	42.237.5.128/27	42.237.5.128	42.237.5.129	42.237.5.158	42.237.5.159	30
2	42.237.5.160/27	42.237.5.160	42.237.5.161	42.237.5.190	42.237.5.191	30
3	42.237.5.192/27	42.237.5.192	42.237.5.193	42.237.5.222	42.237.5.223	30
4	42.237.5.224/27	42.237.5.224	42.237.5.225	42.237.5.254	42.237.5.255	30

Split 42.237.5.128/25 into 8 equal /28 subnets (14 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	42.237.5.128/28	42.237.5.128	42.237.5.129	42.237.5.142	42.237.5.143	14
2	42.237.5.144/28	42.237.5.144	42.237.5.145	42.237.5.158	42.237.5.159	14
3	42.237.5.160/28	42.237.5.160	42.237.5.161	42.237.5.174	42.237.5.175	14
4	42.237.5.176/28	42.237.5.176	42.237.5.177	42.237.5.190	42.237.5.191	14
5	42.237.5.192/28	42.237.5.192	42.237.5.193	42.237.5.206	42.237.5.207	14
6	42.237.5.208/28	42.237.5.208	42.237.5.209	42.237.5.222	42.237.5.223	14
7	42.237.5.224/28	42.237.5.224	42.237.5.225	42.237.5.238	42.237.5.239	14
8	42.237.5.240/28	42.237.5.240	42.237.5.241	42.237.5.254	42.237.5.255	14

Split 42.237.5.128/25 into 16 equal /29 subnets (6 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	42.237.5.128/29	42.237.5.128	42.237.5.129	42.237.5.134	42.237.5.135	6
2	42.237.5.136/29	42.237.5.136	42.237.5.137	42.237.5.142	42.237.5.143	6
3	42.237.5.144/29	42.237.5.144	42.237.5.145	42.237.5.150	42.237.5.151	6
4	42.237.5.152/29	42.237.5.152	42.237.5.153	42.237.5.158	42.237.5.159	6
5	42.237.5.160/29	42.237.5.160	42.237.5.161	42.237.5.166	42.237.5.167	6
6	42.237.5.168/29	42.237.5.168	42.237.5.169	42.237.5.174	42.237.5.175	6
7	42.237.5.176/29	42.237.5.176	42.237.5.177	42.237.5.182	42.237.5.183	6
8	42.237.5.184/29	42.237.5.184	42.237.5.185	42.237.5.190	42.237.5.191	6
9	42.237.5.192/29	42.237.5.192	42.237.5.193	42.237.5.198	42.237.5.199	6
10	42.237.5.200/29	42.237.5.200	42.237.5.201	42.237.5.206	42.237.5.207	6
11	42.237.5.208/29	42.237.5.208	42.237.5.209	42.237.5.214	42.237.5.215	6
12	42.237.5.216/29	42.237.5.216	42.237.5.217	42.237.5.222	42.237.5.223	6
13	42.237.5.224/29	42.237.5.224	42.237.5.225	42.237.5.230	42.237.5.231	6
14	42.237.5.232/29	42.237.5.232	42.237.5.233	42.237.5.238	42.237.5.239	6
15	42.237.5.240/29	42.237.5.240	42.237.5.241	42.237.5.246	42.237.5.247	6
16	42.237.5.248/29	42.237.5.248	42.237.5.249	42.237.5.254	42.237.5.255	6

IP Address Sample

Showing first 16 of 128 total IPs.

42.237.5.128 net

42.237.5.129

42.237.5.130

42.237.5.131

42.237.5.132

42.237.5.133

42.237.5.134

42.237.5.135

42.237.5.136

42.237.5.137

42.237.5.138

42.237.5.139

42.237.5.140

42.237.5.141

42.237.5.142

42.237.5.143

… 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 42.237.5.0/24 Sibling /25 block 42.237.5.0/25

Adjacent Prefix Sizes

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