IPRangeExplorer

42.237.0.128/25

Public

Class A — /25 prefix — 126 usable hosts

Network Address
42.237.0.128
Broadcast Address
42.237.0.255
Subnet Mask
255.255.255.128
Usable Hosts
126
First Usable IP
42.237.0.129
Last Usable IP
42.237.0.254
Total IPs
128
Prefix Length
/25

Network address — the base address of the block (42.237.0.128). All devices in this subnet share this prefix. Cannot be assigned to a host.

Broadcast address — packets sent to 42.237.0.255 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 42.237.0.128/25
Network Address 42.237.0.128
Broadcast Address 42.237.0.255
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 42.237.0.129
Last Usable IP 42.237.0.254
Network (Hex) 0x2AED0080
Broadcast (Hex) 0x2AED00FF
Address Type Public / Globally Routable

Binary Representation

Network Address
00101010.11101101.00000000 00101010.11101101.00000000.10000000
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 42.237.0.128/25 into 2 equal /26 subnets (62 usable hosts each).

# CIDR Network First Usable Last Usable Broadcast Hosts
1 42.237.0.128/26 42.237.0.128 42.237.0.129 42.237.0.190 42.237.0.191 62
2 42.237.0.192/26 42.237.0.192 42.237.0.193 42.237.0.254 42.237.0.255 62

IP Address Sample

Showing first 16 of 128 total IPs.

42.237.0.128 net
42.237.0.129
42.237.0.130
42.237.0.131
42.237.0.132
42.237.0.133
42.237.0.134
42.237.0.135
42.237.0.136
42.237.0.137
42.237.0.138
42.237.0.139
42.237.0.140
42.237.0.141
42.237.0.142
42.237.0.143
… 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 42.237.0.0/24 Sibling /25 block 42.237.0.0/25

Adjacent Prefix Sizes

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

Calculate Another