33.72.8.128/25

Public

Class A — /25 prefix — 126 usable hosts

Network Address

33.72.8.128

Broadcast Address

33.72.8.255

Subnet Mask

255.255.255.128

Usable Hosts

126

First Usable IP

33.72.8.129

Last Usable IP

33.72.8.254

Total IPs

128

Prefix Length

/25

Network address — the base address of the block (33.72.8.128). All devices in this subnet share this prefix. Cannot be assigned to a host.

Broadcast address — packets sent to 33.72.8.255 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	33.72.8.128/25
Network Address	33.72.8.128
Broadcast Address	33.72.8.255
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	33.72.8.129
Last Usable IP	33.72.8.254
Network (Hex)	0x21480880
Broadcast (Hex)	0x214808FF
Address Type	Public / Globally Routable

Binary Representation

Network Address

00100001.01001000.00001000 00100001.01001000.00001000.10000000

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 33.72.8.128/25 into 2 equal /26 subnets (62 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	33.72.8.128/26	33.72.8.128	33.72.8.129	33.72.8.190	33.72.8.191	62
2	33.72.8.192/26	33.72.8.192	33.72.8.193	33.72.8.254	33.72.8.255	62

Split 33.72.8.128/25 into 4 equal /27 subnets (30 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	33.72.8.128/27	33.72.8.128	33.72.8.129	33.72.8.158	33.72.8.159	30
2	33.72.8.160/27	33.72.8.160	33.72.8.161	33.72.8.190	33.72.8.191	30
3	33.72.8.192/27	33.72.8.192	33.72.8.193	33.72.8.222	33.72.8.223	30
4	33.72.8.224/27	33.72.8.224	33.72.8.225	33.72.8.254	33.72.8.255	30

Split 33.72.8.128/25 into 8 equal /28 subnets (14 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	33.72.8.128/28	33.72.8.128	33.72.8.129	33.72.8.142	33.72.8.143	14
2	33.72.8.144/28	33.72.8.144	33.72.8.145	33.72.8.158	33.72.8.159	14
3	33.72.8.160/28	33.72.8.160	33.72.8.161	33.72.8.174	33.72.8.175	14
4	33.72.8.176/28	33.72.8.176	33.72.8.177	33.72.8.190	33.72.8.191	14
5	33.72.8.192/28	33.72.8.192	33.72.8.193	33.72.8.206	33.72.8.207	14
6	33.72.8.208/28	33.72.8.208	33.72.8.209	33.72.8.222	33.72.8.223	14
7	33.72.8.224/28	33.72.8.224	33.72.8.225	33.72.8.238	33.72.8.239	14
8	33.72.8.240/28	33.72.8.240	33.72.8.241	33.72.8.254	33.72.8.255	14

Split 33.72.8.128/25 into 16 equal /29 subnets (6 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	33.72.8.128/29	33.72.8.128	33.72.8.129	33.72.8.134	33.72.8.135	6
2	33.72.8.136/29	33.72.8.136	33.72.8.137	33.72.8.142	33.72.8.143	6
3	33.72.8.144/29	33.72.8.144	33.72.8.145	33.72.8.150	33.72.8.151	6
4	33.72.8.152/29	33.72.8.152	33.72.8.153	33.72.8.158	33.72.8.159	6
5	33.72.8.160/29	33.72.8.160	33.72.8.161	33.72.8.166	33.72.8.167	6
6	33.72.8.168/29	33.72.8.168	33.72.8.169	33.72.8.174	33.72.8.175	6
7	33.72.8.176/29	33.72.8.176	33.72.8.177	33.72.8.182	33.72.8.183	6
8	33.72.8.184/29	33.72.8.184	33.72.8.185	33.72.8.190	33.72.8.191	6
9	33.72.8.192/29	33.72.8.192	33.72.8.193	33.72.8.198	33.72.8.199	6
10	33.72.8.200/29	33.72.8.200	33.72.8.201	33.72.8.206	33.72.8.207	6
11	33.72.8.208/29	33.72.8.208	33.72.8.209	33.72.8.214	33.72.8.215	6
12	33.72.8.216/29	33.72.8.216	33.72.8.217	33.72.8.222	33.72.8.223	6
13	33.72.8.224/29	33.72.8.224	33.72.8.225	33.72.8.230	33.72.8.231	6
14	33.72.8.232/29	33.72.8.232	33.72.8.233	33.72.8.238	33.72.8.239	6
15	33.72.8.240/29	33.72.8.240	33.72.8.241	33.72.8.246	33.72.8.247	6
16	33.72.8.248/29	33.72.8.248	33.72.8.249	33.72.8.254	33.72.8.255	6

IP Address Sample

Showing first 16 of 128 total IPs.

33.72.8.128 net

33.72.8.129

33.72.8.130

33.72.8.131

33.72.8.132

33.72.8.133

33.72.8.134

33.72.8.135

33.72.8.136

33.72.8.137

33.72.8.138

33.72.8.139

33.72.8.140

33.72.8.141

33.72.8.142

33.72.8.143

… 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 33.72.8.0/24 Sibling /25 block 33.72.8.0/25

Adjacent Prefix Sizes

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