136.18.33.0/25

Public

Class B — /25 prefix — 126 usable hosts

Network Address

136.18.33.0

Broadcast Address

136.18.33.127

Subnet Mask

255.255.255.128

Usable Hosts

126

First Usable IP

136.18.33.1

Last Usable IP

136.18.33.126

Total IPs

128

Prefix Length

/25

Network address — the base address of the block (136.18.33.0). All devices in this subnet share this prefix. Cannot be assigned to a host.

Broadcast address — packets sent to 136.18.33.127 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	136.18.33.0/25
Network Address	136.18.33.0
Broadcast Address	136.18.33.127
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	136.18.33.1
Last Usable IP	136.18.33.126
Network (Hex)	0x88122100
Broadcast (Hex)	0x8812217F
Address Type	Public / Globally Routable

Binary Representation

Network Address

10001000.00010010.00100001 10001000.00010010.00100001.00000000

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 136.18.33.0/25 into 2 equal /26 subnets (62 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	136.18.33.0/26	136.18.33.0	136.18.33.1	136.18.33.62	136.18.33.63	62
2	136.18.33.64/26	136.18.33.64	136.18.33.65	136.18.33.126	136.18.33.127	62

Split 136.18.33.0/25 into 4 equal /27 subnets (30 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	136.18.33.0/27	136.18.33.0	136.18.33.1	136.18.33.30	136.18.33.31	30
2	136.18.33.32/27	136.18.33.32	136.18.33.33	136.18.33.62	136.18.33.63	30
3	136.18.33.64/27	136.18.33.64	136.18.33.65	136.18.33.94	136.18.33.95	30
4	136.18.33.96/27	136.18.33.96	136.18.33.97	136.18.33.126	136.18.33.127	30

Split 136.18.33.0/25 into 8 equal /28 subnets (14 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	136.18.33.0/28	136.18.33.0	136.18.33.1	136.18.33.14	136.18.33.15	14
2	136.18.33.16/28	136.18.33.16	136.18.33.17	136.18.33.30	136.18.33.31	14
3	136.18.33.32/28	136.18.33.32	136.18.33.33	136.18.33.46	136.18.33.47	14
4	136.18.33.48/28	136.18.33.48	136.18.33.49	136.18.33.62	136.18.33.63	14
5	136.18.33.64/28	136.18.33.64	136.18.33.65	136.18.33.78	136.18.33.79	14
6	136.18.33.80/28	136.18.33.80	136.18.33.81	136.18.33.94	136.18.33.95	14
7	136.18.33.96/28	136.18.33.96	136.18.33.97	136.18.33.110	136.18.33.111	14
8	136.18.33.112/28	136.18.33.112	136.18.33.113	136.18.33.126	136.18.33.127	14

Split 136.18.33.0/25 into 16 equal /29 subnets (6 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	136.18.33.0/29	136.18.33.0	136.18.33.1	136.18.33.6	136.18.33.7	6
2	136.18.33.8/29	136.18.33.8	136.18.33.9	136.18.33.14	136.18.33.15	6
3	136.18.33.16/29	136.18.33.16	136.18.33.17	136.18.33.22	136.18.33.23	6
4	136.18.33.24/29	136.18.33.24	136.18.33.25	136.18.33.30	136.18.33.31	6
5	136.18.33.32/29	136.18.33.32	136.18.33.33	136.18.33.38	136.18.33.39	6
6	136.18.33.40/29	136.18.33.40	136.18.33.41	136.18.33.46	136.18.33.47	6
7	136.18.33.48/29	136.18.33.48	136.18.33.49	136.18.33.54	136.18.33.55	6
8	136.18.33.56/29	136.18.33.56	136.18.33.57	136.18.33.62	136.18.33.63	6
9	136.18.33.64/29	136.18.33.64	136.18.33.65	136.18.33.70	136.18.33.71	6
10	136.18.33.72/29	136.18.33.72	136.18.33.73	136.18.33.78	136.18.33.79	6
11	136.18.33.80/29	136.18.33.80	136.18.33.81	136.18.33.86	136.18.33.87	6
12	136.18.33.88/29	136.18.33.88	136.18.33.89	136.18.33.94	136.18.33.95	6
13	136.18.33.96/29	136.18.33.96	136.18.33.97	136.18.33.102	136.18.33.103	6
14	136.18.33.104/29	136.18.33.104	136.18.33.105	136.18.33.110	136.18.33.111	6
15	136.18.33.112/29	136.18.33.112	136.18.33.113	136.18.33.118	136.18.33.119	6
16	136.18.33.120/29	136.18.33.120	136.18.33.121	136.18.33.126	136.18.33.127	6

IP Address Sample

Showing first 16 of 128 total IPs.

136.18.33.0 net

136.18.33.1

136.18.33.2

136.18.33.3

136.18.33.4

136.18.33.5

136.18.33.6

136.18.33.7

136.18.33.8

136.18.33.9

136.18.33.10

136.18.33.11

136.18.33.12

136.18.33.13

136.18.33.14

136.18.33.15

… 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 136.18.33.0/24 Sibling /25 block 136.18.33.128/25

Adjacent Prefix Sizes

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