100.120.168.64/26

Public

Class A — /26 prefix — 62 usable hosts

Network Address

100.120.168.64

Broadcast Address

100.120.168.127

Subnet Mask

255.255.255.192

Usable Hosts

First Usable IP

100.120.168.65

Last Usable IP

100.120.168.126

Total IPs

Prefix Length

/26

Network address — the base address of the block (100.120.168.64). All devices in this subnet share this prefix. Cannot be assigned to a host.

Broadcast address — packets sent to 100.120.168.127 are delivered to every device in the subnet. Also reserved — not assignable.

Usable hosts — the 62 addresses between those two that you can assign to servers, VMs, or interfaces.

Subnet mask — 255.255.255.192 is the dotted-decimal equivalent of /26. Older tools and Cisco configs use this format instead of CIDR slash notation.

Full Details

CIDR Notation	100.120.168.64/26
Network Address	100.120.168.64
Broadcast Address	100.120.168.127
Subnet Mask	255.255.255.192
Wildcard Mask	0.0.0.63
Prefix Length	/26
IP Address Class	Class A
Total IP Addresses	64
Usable Host Addresses	62
First Usable IP	100.120.168.65
Last Usable IP	100.120.168.126
Network (Hex)	0x6478A840
Broadcast (Hex)	0x6478A87F
Address Type	Public / Globally Routable

Binary Representation

Network Address

01100100.01111000.10101000 01100100.01111000.10101000.01000000

Subnet Mask

11111111.11111111.11111111.11000000

The first 26 bits (1s in the mask) identify the network. The remaining 6 bits identify hosts within the network.

Split into Equal Subnets

Split 100.120.168.64/26 into 2 equal /27 subnets (30 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	100.120.168.64/27	100.120.168.64	100.120.168.65	100.120.168.94	100.120.168.95	30
2	100.120.168.96/27	100.120.168.96	100.120.168.97	100.120.168.126	100.120.168.127	30

Split 100.120.168.64/26 into 4 equal /28 subnets (14 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	100.120.168.64/28	100.120.168.64	100.120.168.65	100.120.168.78	100.120.168.79	14
2	100.120.168.80/28	100.120.168.80	100.120.168.81	100.120.168.94	100.120.168.95	14
3	100.120.168.96/28	100.120.168.96	100.120.168.97	100.120.168.110	100.120.168.111	14
4	100.120.168.112/28	100.120.168.112	100.120.168.113	100.120.168.126	100.120.168.127	14

Split 100.120.168.64/26 into 8 equal /29 subnets (6 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	100.120.168.64/29	100.120.168.64	100.120.168.65	100.120.168.70	100.120.168.71	6
2	100.120.168.72/29	100.120.168.72	100.120.168.73	100.120.168.78	100.120.168.79	6
3	100.120.168.80/29	100.120.168.80	100.120.168.81	100.120.168.86	100.120.168.87	6
4	100.120.168.88/29	100.120.168.88	100.120.168.89	100.120.168.94	100.120.168.95	6
5	100.120.168.96/29	100.120.168.96	100.120.168.97	100.120.168.102	100.120.168.103	6
6	100.120.168.104/29	100.120.168.104	100.120.168.105	100.120.168.110	100.120.168.111	6
7	100.120.168.112/29	100.120.168.112	100.120.168.113	100.120.168.118	100.120.168.119	6
8	100.120.168.120/29	100.120.168.120	100.120.168.121	100.120.168.126	100.120.168.127	6

Split 100.120.168.64/26 into 16 equal /30 subnets (2 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	100.120.168.64/30	100.120.168.64	100.120.168.65	100.120.168.66	100.120.168.67	2
2	100.120.168.68/30	100.120.168.68	100.120.168.69	100.120.168.70	100.120.168.71	2
3	100.120.168.72/30	100.120.168.72	100.120.168.73	100.120.168.74	100.120.168.75	2
4	100.120.168.76/30	100.120.168.76	100.120.168.77	100.120.168.78	100.120.168.79	2
5	100.120.168.80/30	100.120.168.80	100.120.168.81	100.120.168.82	100.120.168.83	2
6	100.120.168.84/30	100.120.168.84	100.120.168.85	100.120.168.86	100.120.168.87	2
7	100.120.168.88/30	100.120.168.88	100.120.168.89	100.120.168.90	100.120.168.91	2
8	100.120.168.92/30	100.120.168.92	100.120.168.93	100.120.168.94	100.120.168.95	2
9	100.120.168.96/30	100.120.168.96	100.120.168.97	100.120.168.98	100.120.168.99	2
10	100.120.168.100/30	100.120.168.100	100.120.168.101	100.120.168.102	100.120.168.103	2
11	100.120.168.104/30	100.120.168.104	100.120.168.105	100.120.168.106	100.120.168.107	2
12	100.120.168.108/30	100.120.168.108	100.120.168.109	100.120.168.110	100.120.168.111	2
13	100.120.168.112/30	100.120.168.112	100.120.168.113	100.120.168.114	100.120.168.115	2
14	100.120.168.116/30	100.120.168.116	100.120.168.117	100.120.168.118	100.120.168.119	2
15	100.120.168.120/30	100.120.168.120	100.120.168.121	100.120.168.122	100.120.168.123	2
16	100.120.168.124/30	100.120.168.124	100.120.168.125	100.120.168.126	100.120.168.127	2

IP Address Sample

Showing first 16 of 64 total IPs.

100.120.168.64 net

100.120.168.65

100.120.168.66

100.120.168.67

100.120.168.68

100.120.168.69

100.120.168.70

100.120.168.71

100.120.168.72

100.120.168.73

100.120.168.74

100.120.168.75

100.120.168.76

100.120.168.77

100.120.168.78

100.120.168.79

… 48 more IPs …

/26 Subnet Reference

Total IPs 64

Usable Hosts 62

Subnet Mask 255.255.255.192

Wildcard 0.0.0.63

Full /26 reference →

Related Ranges

Parent /25 block 100.120.168.0/25 Sibling /26 block 100.120.168.0/26

Adjacent Prefix Sizes

/24 254 hosts /25 126 hosts /26 62 hosts /27 30 hosts /28 14 hosts