100.98.60.0/25

Public

Class A — /25 prefix — 126 usable hosts

Network Address

100.98.60.0

Broadcast Address

100.98.60.127

Subnet Mask

255.255.255.128

Usable Hosts

126

First Usable IP

100.98.60.1

Last Usable IP

100.98.60.126

Total IPs

128

Prefix Length

/25

Network address — the base address of the block (100.98.60.0). All devices in this subnet share this prefix. Cannot be assigned to a host.

Broadcast address — packets sent to 100.98.60.127 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	100.98.60.0/25
Network Address	100.98.60.0
Broadcast Address	100.98.60.127
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	100.98.60.1
Last Usable IP	100.98.60.126
Network (Hex)	0x64623C00
Broadcast (Hex)	0x64623C7F
Address Type	Public / Globally Routable

Binary Representation

Network Address

01100100.01100010.00111100 01100100.01100010.00111100.00000000

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 100.98.60.0/25 into 2 equal /26 subnets (62 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	100.98.60.0/26	100.98.60.0	100.98.60.1	100.98.60.62	100.98.60.63	62
2	100.98.60.64/26	100.98.60.64	100.98.60.65	100.98.60.126	100.98.60.127	62

Split 100.98.60.0/25 into 4 equal /27 subnets (30 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	100.98.60.0/27	100.98.60.0	100.98.60.1	100.98.60.30	100.98.60.31	30
2	100.98.60.32/27	100.98.60.32	100.98.60.33	100.98.60.62	100.98.60.63	30
3	100.98.60.64/27	100.98.60.64	100.98.60.65	100.98.60.94	100.98.60.95	30
4	100.98.60.96/27	100.98.60.96	100.98.60.97	100.98.60.126	100.98.60.127	30

Split 100.98.60.0/25 into 8 equal /28 subnets (14 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	100.98.60.0/28	100.98.60.0	100.98.60.1	100.98.60.14	100.98.60.15	14
2	100.98.60.16/28	100.98.60.16	100.98.60.17	100.98.60.30	100.98.60.31	14
3	100.98.60.32/28	100.98.60.32	100.98.60.33	100.98.60.46	100.98.60.47	14
4	100.98.60.48/28	100.98.60.48	100.98.60.49	100.98.60.62	100.98.60.63	14
5	100.98.60.64/28	100.98.60.64	100.98.60.65	100.98.60.78	100.98.60.79	14
6	100.98.60.80/28	100.98.60.80	100.98.60.81	100.98.60.94	100.98.60.95	14
7	100.98.60.96/28	100.98.60.96	100.98.60.97	100.98.60.110	100.98.60.111	14
8	100.98.60.112/28	100.98.60.112	100.98.60.113	100.98.60.126	100.98.60.127	14

Split 100.98.60.0/25 into 16 equal /29 subnets (6 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	100.98.60.0/29	100.98.60.0	100.98.60.1	100.98.60.6	100.98.60.7	6
2	100.98.60.8/29	100.98.60.8	100.98.60.9	100.98.60.14	100.98.60.15	6
3	100.98.60.16/29	100.98.60.16	100.98.60.17	100.98.60.22	100.98.60.23	6
4	100.98.60.24/29	100.98.60.24	100.98.60.25	100.98.60.30	100.98.60.31	6
5	100.98.60.32/29	100.98.60.32	100.98.60.33	100.98.60.38	100.98.60.39	6
6	100.98.60.40/29	100.98.60.40	100.98.60.41	100.98.60.46	100.98.60.47	6
7	100.98.60.48/29	100.98.60.48	100.98.60.49	100.98.60.54	100.98.60.55	6
8	100.98.60.56/29	100.98.60.56	100.98.60.57	100.98.60.62	100.98.60.63	6
9	100.98.60.64/29	100.98.60.64	100.98.60.65	100.98.60.70	100.98.60.71	6
10	100.98.60.72/29	100.98.60.72	100.98.60.73	100.98.60.78	100.98.60.79	6
11	100.98.60.80/29	100.98.60.80	100.98.60.81	100.98.60.86	100.98.60.87	6
12	100.98.60.88/29	100.98.60.88	100.98.60.89	100.98.60.94	100.98.60.95	6
13	100.98.60.96/29	100.98.60.96	100.98.60.97	100.98.60.102	100.98.60.103	6
14	100.98.60.104/29	100.98.60.104	100.98.60.105	100.98.60.110	100.98.60.111	6
15	100.98.60.112/29	100.98.60.112	100.98.60.113	100.98.60.118	100.98.60.119	6
16	100.98.60.120/29	100.98.60.120	100.98.60.121	100.98.60.126	100.98.60.127	6

IP Address Sample

Showing first 16 of 128 total IPs.

100.98.60.0 net

100.98.60.1

100.98.60.2

100.98.60.3

100.98.60.4

100.98.60.5

100.98.60.6

100.98.60.7

100.98.60.8

100.98.60.9

100.98.60.10

100.98.60.11

100.98.60.12

100.98.60.13

100.98.60.14

100.98.60.15

… 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 100.98.60.0/24 Sibling /25 block 100.98.60.128/25

Adjacent Prefix Sizes

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