28.9.18.64/26

Public

Class A — /26 prefix — 62 usable hosts

Network Address

28.9.18.64

Broadcast Address

28.9.18.127

Subnet Mask

255.255.255.192

Usable Hosts

First Usable IP

28.9.18.65

Last Usable IP

28.9.18.126

Total IPs

Prefix Length

/26

Network address — the base address of the block (28.9.18.64). All devices in this subnet share this prefix. Cannot be assigned to a host.

Broadcast address — packets sent to 28.9.18.127 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	28.9.18.64/26
Network Address	28.9.18.64
Broadcast Address	28.9.18.127
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	28.9.18.65
Last Usable IP	28.9.18.126
Network (Hex)	0x1C091240
Broadcast (Hex)	0x1C09127F
Address Type	Public / Globally Routable

Binary Representation

Network Address

00011100.00001001.00010010 00011100.00001001.00010010.01000000

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 28.9.18.64/26 into 2 equal /27 subnets (30 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	28.9.18.64/27	28.9.18.64	28.9.18.65	28.9.18.94	28.9.18.95	30
2	28.9.18.96/27	28.9.18.96	28.9.18.97	28.9.18.126	28.9.18.127	30

Split 28.9.18.64/26 into 4 equal /28 subnets (14 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	28.9.18.64/28	28.9.18.64	28.9.18.65	28.9.18.78	28.9.18.79	14
2	28.9.18.80/28	28.9.18.80	28.9.18.81	28.9.18.94	28.9.18.95	14
3	28.9.18.96/28	28.9.18.96	28.9.18.97	28.9.18.110	28.9.18.111	14
4	28.9.18.112/28	28.9.18.112	28.9.18.113	28.9.18.126	28.9.18.127	14

Split 28.9.18.64/26 into 8 equal /29 subnets (6 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	28.9.18.64/29	28.9.18.64	28.9.18.65	28.9.18.70	28.9.18.71	6
2	28.9.18.72/29	28.9.18.72	28.9.18.73	28.9.18.78	28.9.18.79	6
3	28.9.18.80/29	28.9.18.80	28.9.18.81	28.9.18.86	28.9.18.87	6
4	28.9.18.88/29	28.9.18.88	28.9.18.89	28.9.18.94	28.9.18.95	6
5	28.9.18.96/29	28.9.18.96	28.9.18.97	28.9.18.102	28.9.18.103	6
6	28.9.18.104/29	28.9.18.104	28.9.18.105	28.9.18.110	28.9.18.111	6
7	28.9.18.112/29	28.9.18.112	28.9.18.113	28.9.18.118	28.9.18.119	6
8	28.9.18.120/29	28.9.18.120	28.9.18.121	28.9.18.126	28.9.18.127	6

Split 28.9.18.64/26 into 16 equal /30 subnets (2 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	28.9.18.64/30	28.9.18.64	28.9.18.65	28.9.18.66	28.9.18.67	2
2	28.9.18.68/30	28.9.18.68	28.9.18.69	28.9.18.70	28.9.18.71	2
3	28.9.18.72/30	28.9.18.72	28.9.18.73	28.9.18.74	28.9.18.75	2
4	28.9.18.76/30	28.9.18.76	28.9.18.77	28.9.18.78	28.9.18.79	2
5	28.9.18.80/30	28.9.18.80	28.9.18.81	28.9.18.82	28.9.18.83	2
6	28.9.18.84/30	28.9.18.84	28.9.18.85	28.9.18.86	28.9.18.87	2
7	28.9.18.88/30	28.9.18.88	28.9.18.89	28.9.18.90	28.9.18.91	2
8	28.9.18.92/30	28.9.18.92	28.9.18.93	28.9.18.94	28.9.18.95	2
9	28.9.18.96/30	28.9.18.96	28.9.18.97	28.9.18.98	28.9.18.99	2
10	28.9.18.100/30	28.9.18.100	28.9.18.101	28.9.18.102	28.9.18.103	2
11	28.9.18.104/30	28.9.18.104	28.9.18.105	28.9.18.106	28.9.18.107	2
12	28.9.18.108/30	28.9.18.108	28.9.18.109	28.9.18.110	28.9.18.111	2
13	28.9.18.112/30	28.9.18.112	28.9.18.113	28.9.18.114	28.9.18.115	2
14	28.9.18.116/30	28.9.18.116	28.9.18.117	28.9.18.118	28.9.18.119	2
15	28.9.18.120/30	28.9.18.120	28.9.18.121	28.9.18.122	28.9.18.123	2
16	28.9.18.124/30	28.9.18.124	28.9.18.125	28.9.18.126	28.9.18.127	2

IP Address Sample

Showing first 16 of 64 total IPs.

28.9.18.64 net

28.9.18.65

28.9.18.66

28.9.18.67

28.9.18.68

28.9.18.69

28.9.18.70

28.9.18.71

28.9.18.72

28.9.18.73

28.9.18.74

28.9.18.75

28.9.18.76

28.9.18.77

28.9.18.78

28.9.18.79

… 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 28.9.18.0/25 Sibling /26 block 28.9.18.0/26

Adjacent Prefix Sizes

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