11.100.199.0/25

Public

Class A — /25 prefix — 126 usable hosts

Network Address

11.100.199.0

Broadcast Address

11.100.199.127

Subnet Mask

255.255.255.128

Usable Hosts

126

First Usable IP

11.100.199.1

Last Usable IP

11.100.199.126

Total IPs

128

Prefix Length

/25

Network address — the base address of the block (11.100.199.0). All devices in this subnet share this prefix. Cannot be assigned to a host.

Broadcast address — packets sent to 11.100.199.127 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	11.100.199.0/25
Network Address	11.100.199.0
Broadcast Address	11.100.199.127
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	11.100.199.1
Last Usable IP	11.100.199.126
Network (Hex)	0x0B64C700
Broadcast (Hex)	0x0B64C77F
Address Type	Public / Globally Routable

Binary Representation

Network Address

00001011.01100100.11000111 00001011.01100100.11000111.00000000

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 11.100.199.0/25 into 2 equal /26 subnets (62 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	11.100.199.0/26	11.100.199.0	11.100.199.1	11.100.199.62	11.100.199.63	62
2	11.100.199.64/26	11.100.199.64	11.100.199.65	11.100.199.126	11.100.199.127	62

Split 11.100.199.0/25 into 4 equal /27 subnets (30 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	11.100.199.0/27	11.100.199.0	11.100.199.1	11.100.199.30	11.100.199.31	30
2	11.100.199.32/27	11.100.199.32	11.100.199.33	11.100.199.62	11.100.199.63	30
3	11.100.199.64/27	11.100.199.64	11.100.199.65	11.100.199.94	11.100.199.95	30
4	11.100.199.96/27	11.100.199.96	11.100.199.97	11.100.199.126	11.100.199.127	30

Split 11.100.199.0/25 into 8 equal /28 subnets (14 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	11.100.199.0/28	11.100.199.0	11.100.199.1	11.100.199.14	11.100.199.15	14
2	11.100.199.16/28	11.100.199.16	11.100.199.17	11.100.199.30	11.100.199.31	14
3	11.100.199.32/28	11.100.199.32	11.100.199.33	11.100.199.46	11.100.199.47	14
4	11.100.199.48/28	11.100.199.48	11.100.199.49	11.100.199.62	11.100.199.63	14
5	11.100.199.64/28	11.100.199.64	11.100.199.65	11.100.199.78	11.100.199.79	14
6	11.100.199.80/28	11.100.199.80	11.100.199.81	11.100.199.94	11.100.199.95	14
7	11.100.199.96/28	11.100.199.96	11.100.199.97	11.100.199.110	11.100.199.111	14
8	11.100.199.112/28	11.100.199.112	11.100.199.113	11.100.199.126	11.100.199.127	14

Split 11.100.199.0/25 into 16 equal /29 subnets (6 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	11.100.199.0/29	11.100.199.0	11.100.199.1	11.100.199.6	11.100.199.7	6
2	11.100.199.8/29	11.100.199.8	11.100.199.9	11.100.199.14	11.100.199.15	6
3	11.100.199.16/29	11.100.199.16	11.100.199.17	11.100.199.22	11.100.199.23	6
4	11.100.199.24/29	11.100.199.24	11.100.199.25	11.100.199.30	11.100.199.31	6
5	11.100.199.32/29	11.100.199.32	11.100.199.33	11.100.199.38	11.100.199.39	6
6	11.100.199.40/29	11.100.199.40	11.100.199.41	11.100.199.46	11.100.199.47	6
7	11.100.199.48/29	11.100.199.48	11.100.199.49	11.100.199.54	11.100.199.55	6
8	11.100.199.56/29	11.100.199.56	11.100.199.57	11.100.199.62	11.100.199.63	6
9	11.100.199.64/29	11.100.199.64	11.100.199.65	11.100.199.70	11.100.199.71	6
10	11.100.199.72/29	11.100.199.72	11.100.199.73	11.100.199.78	11.100.199.79	6
11	11.100.199.80/29	11.100.199.80	11.100.199.81	11.100.199.86	11.100.199.87	6
12	11.100.199.88/29	11.100.199.88	11.100.199.89	11.100.199.94	11.100.199.95	6
13	11.100.199.96/29	11.100.199.96	11.100.199.97	11.100.199.102	11.100.199.103	6
14	11.100.199.104/29	11.100.199.104	11.100.199.105	11.100.199.110	11.100.199.111	6
15	11.100.199.112/29	11.100.199.112	11.100.199.113	11.100.199.118	11.100.199.119	6
16	11.100.199.120/29	11.100.199.120	11.100.199.121	11.100.199.126	11.100.199.127	6

IP Address Sample

Showing first 16 of 128 total IPs.

11.100.199.0 net

11.100.199.1

11.100.199.2

11.100.199.3

11.100.199.4

11.100.199.5

11.100.199.6

11.100.199.7

11.100.199.8

11.100.199.9

11.100.199.10

11.100.199.11

11.100.199.12

11.100.199.13

11.100.199.14

11.100.199.15

… 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 11.100.199.0/24 Sibling /25 block 11.100.199.128/25

Adjacent Prefix Sizes

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