27.9.2.64/26

Public

Class A — /26 prefix — 62 usable hosts

Network Address

27.9.2.64

Broadcast Address

27.9.2.127

Subnet Mask

255.255.255.192

Usable Hosts

First Usable IP

27.9.2.65

Last Usable IP

27.9.2.126

Total IPs

Prefix Length

/26

Network address — the base address of the block (27.9.2.64). All devices in this subnet share this prefix. Cannot be assigned to a host.

Broadcast address — packets sent to 27.9.2.127 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	27.9.2.64/26
Network Address	27.9.2.64
Broadcast Address	27.9.2.127
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	27.9.2.65
Last Usable IP	27.9.2.126
Network (Hex)	0x1B090240
Broadcast (Hex)	0x1B09027F
Address Type	Public / Globally Routable

Binary Representation

Network Address

00011011.00001001.00000010 00011011.00001001.00000010.01000000

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 27.9.2.64/26 into 2 equal /27 subnets (30 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	27.9.2.64/27	27.9.2.64	27.9.2.65	27.9.2.94	27.9.2.95	30
2	27.9.2.96/27	27.9.2.96	27.9.2.97	27.9.2.126	27.9.2.127	30

Split 27.9.2.64/26 into 4 equal /28 subnets (14 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	27.9.2.64/28	27.9.2.64	27.9.2.65	27.9.2.78	27.9.2.79	14
2	27.9.2.80/28	27.9.2.80	27.9.2.81	27.9.2.94	27.9.2.95	14
3	27.9.2.96/28	27.9.2.96	27.9.2.97	27.9.2.110	27.9.2.111	14
4	27.9.2.112/28	27.9.2.112	27.9.2.113	27.9.2.126	27.9.2.127	14

Split 27.9.2.64/26 into 8 equal /29 subnets (6 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	27.9.2.64/29	27.9.2.64	27.9.2.65	27.9.2.70	27.9.2.71	6
2	27.9.2.72/29	27.9.2.72	27.9.2.73	27.9.2.78	27.9.2.79	6
3	27.9.2.80/29	27.9.2.80	27.9.2.81	27.9.2.86	27.9.2.87	6
4	27.9.2.88/29	27.9.2.88	27.9.2.89	27.9.2.94	27.9.2.95	6
5	27.9.2.96/29	27.9.2.96	27.9.2.97	27.9.2.102	27.9.2.103	6
6	27.9.2.104/29	27.9.2.104	27.9.2.105	27.9.2.110	27.9.2.111	6
7	27.9.2.112/29	27.9.2.112	27.9.2.113	27.9.2.118	27.9.2.119	6
8	27.9.2.120/29	27.9.2.120	27.9.2.121	27.9.2.126	27.9.2.127	6

Split 27.9.2.64/26 into 16 equal /30 subnets (2 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	27.9.2.64/30	27.9.2.64	27.9.2.65	27.9.2.66	27.9.2.67	2
2	27.9.2.68/30	27.9.2.68	27.9.2.69	27.9.2.70	27.9.2.71	2
3	27.9.2.72/30	27.9.2.72	27.9.2.73	27.9.2.74	27.9.2.75	2
4	27.9.2.76/30	27.9.2.76	27.9.2.77	27.9.2.78	27.9.2.79	2
5	27.9.2.80/30	27.9.2.80	27.9.2.81	27.9.2.82	27.9.2.83	2
6	27.9.2.84/30	27.9.2.84	27.9.2.85	27.9.2.86	27.9.2.87	2
7	27.9.2.88/30	27.9.2.88	27.9.2.89	27.9.2.90	27.9.2.91	2
8	27.9.2.92/30	27.9.2.92	27.9.2.93	27.9.2.94	27.9.2.95	2
9	27.9.2.96/30	27.9.2.96	27.9.2.97	27.9.2.98	27.9.2.99	2
10	27.9.2.100/30	27.9.2.100	27.9.2.101	27.9.2.102	27.9.2.103	2
11	27.9.2.104/30	27.9.2.104	27.9.2.105	27.9.2.106	27.9.2.107	2
12	27.9.2.108/30	27.9.2.108	27.9.2.109	27.9.2.110	27.9.2.111	2
13	27.9.2.112/30	27.9.2.112	27.9.2.113	27.9.2.114	27.9.2.115	2
14	27.9.2.116/30	27.9.2.116	27.9.2.117	27.9.2.118	27.9.2.119	2
15	27.9.2.120/30	27.9.2.120	27.9.2.121	27.9.2.122	27.9.2.123	2
16	27.9.2.124/30	27.9.2.124	27.9.2.125	27.9.2.126	27.9.2.127	2

IP Address Sample

Showing first 16 of 64 total IPs.

27.9.2.64 net

27.9.2.65

27.9.2.66

27.9.2.67

27.9.2.68

27.9.2.69

27.9.2.70

27.9.2.71

27.9.2.72

27.9.2.73

27.9.2.74

27.9.2.75

27.9.2.76

27.9.2.77

27.9.2.78

27.9.2.79

… 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 27.9.2.0/25 Sibling /26 block 27.9.2.0/26

Adjacent Prefix Sizes

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