28.136.71.64/26

Public

Class A — /26 prefix — 62 usable hosts

Network Address

28.136.71.64

Broadcast Address

28.136.71.127

Subnet Mask

255.255.255.192

Usable Hosts

First Usable IP

28.136.71.65

Last Usable IP

28.136.71.126

Total IPs

Prefix Length

/26

Network address — the base address of the block (28.136.71.64). All devices in this subnet share this prefix. Cannot be assigned to a host.

Broadcast address — packets sent to 28.136.71.127 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	28.136.71.64/26
Network Address	28.136.71.64
Broadcast Address	28.136.71.127
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	28.136.71.65
Last Usable IP	28.136.71.126
Network (Hex)	0x1C884740
Broadcast (Hex)	0x1C88477F
Address Type	Public / Globally Routable

Binary Representation

Network Address

00011100.10001000.01000111 00011100.10001000.01000111.01000000

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 28.136.71.64/26 into 2 equal /27 subnets (30 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	28.136.71.64/27	28.136.71.64	28.136.71.65	28.136.71.94	28.136.71.95	30
2	28.136.71.96/27	28.136.71.96	28.136.71.97	28.136.71.126	28.136.71.127	30

Split 28.136.71.64/26 into 4 equal /28 subnets (14 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	28.136.71.64/28	28.136.71.64	28.136.71.65	28.136.71.78	28.136.71.79	14
2	28.136.71.80/28	28.136.71.80	28.136.71.81	28.136.71.94	28.136.71.95	14
3	28.136.71.96/28	28.136.71.96	28.136.71.97	28.136.71.110	28.136.71.111	14
4	28.136.71.112/28	28.136.71.112	28.136.71.113	28.136.71.126	28.136.71.127	14

Split 28.136.71.64/26 into 8 equal /29 subnets (6 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	28.136.71.64/29	28.136.71.64	28.136.71.65	28.136.71.70	28.136.71.71	6
2	28.136.71.72/29	28.136.71.72	28.136.71.73	28.136.71.78	28.136.71.79	6
3	28.136.71.80/29	28.136.71.80	28.136.71.81	28.136.71.86	28.136.71.87	6
4	28.136.71.88/29	28.136.71.88	28.136.71.89	28.136.71.94	28.136.71.95	6
5	28.136.71.96/29	28.136.71.96	28.136.71.97	28.136.71.102	28.136.71.103	6
6	28.136.71.104/29	28.136.71.104	28.136.71.105	28.136.71.110	28.136.71.111	6
7	28.136.71.112/29	28.136.71.112	28.136.71.113	28.136.71.118	28.136.71.119	6
8	28.136.71.120/29	28.136.71.120	28.136.71.121	28.136.71.126	28.136.71.127	6

Split 28.136.71.64/26 into 16 equal /30 subnets (2 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	28.136.71.64/30	28.136.71.64	28.136.71.65	28.136.71.66	28.136.71.67	2
2	28.136.71.68/30	28.136.71.68	28.136.71.69	28.136.71.70	28.136.71.71	2
3	28.136.71.72/30	28.136.71.72	28.136.71.73	28.136.71.74	28.136.71.75	2
4	28.136.71.76/30	28.136.71.76	28.136.71.77	28.136.71.78	28.136.71.79	2
5	28.136.71.80/30	28.136.71.80	28.136.71.81	28.136.71.82	28.136.71.83	2
6	28.136.71.84/30	28.136.71.84	28.136.71.85	28.136.71.86	28.136.71.87	2
7	28.136.71.88/30	28.136.71.88	28.136.71.89	28.136.71.90	28.136.71.91	2
8	28.136.71.92/30	28.136.71.92	28.136.71.93	28.136.71.94	28.136.71.95	2
9	28.136.71.96/30	28.136.71.96	28.136.71.97	28.136.71.98	28.136.71.99	2
10	28.136.71.100/30	28.136.71.100	28.136.71.101	28.136.71.102	28.136.71.103	2
11	28.136.71.104/30	28.136.71.104	28.136.71.105	28.136.71.106	28.136.71.107	2
12	28.136.71.108/30	28.136.71.108	28.136.71.109	28.136.71.110	28.136.71.111	2
13	28.136.71.112/30	28.136.71.112	28.136.71.113	28.136.71.114	28.136.71.115	2
14	28.136.71.116/30	28.136.71.116	28.136.71.117	28.136.71.118	28.136.71.119	2
15	28.136.71.120/30	28.136.71.120	28.136.71.121	28.136.71.122	28.136.71.123	2
16	28.136.71.124/30	28.136.71.124	28.136.71.125	28.136.71.126	28.136.71.127	2

IP Address Sample

Showing first 16 of 64 total IPs.

28.136.71.64 net

28.136.71.65

28.136.71.66

28.136.71.67

28.136.71.68

28.136.71.69

28.136.71.70

28.136.71.71

28.136.71.72

28.136.71.73

28.136.71.74

28.136.71.75

28.136.71.76

28.136.71.77

28.136.71.78

28.136.71.79

… 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 28.136.71.0/25 Sibling /26 block 28.136.71.0/26

Adjacent Prefix Sizes

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