27.0.3.64/26

Public

Class A — /26 prefix — 62 usable hosts

Network Address

27.0.3.64

Broadcast Address

27.0.3.127

Subnet Mask

255.255.255.192

Usable Hosts

First Usable IP

27.0.3.65

Last Usable IP

27.0.3.126

Total IPs

Prefix Length

/26

Network address — the base address of the block (27.0.3.64). All devices in this subnet share this prefix. Cannot be assigned to a host.

Broadcast address — packets sent to 27.0.3.127 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	27.0.3.64/26
Network Address	27.0.3.64
Broadcast Address	27.0.3.127
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	27.0.3.65
Last Usable IP	27.0.3.126
Network (Hex)	0x1B000340
Broadcast (Hex)	0x1B00037F
Address Type	Public / Globally Routable

Binary Representation

Network Address

00011011.00000000.00000011 00011011.00000000.00000011.01000000

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 27.0.3.64/26 into 2 equal /27 subnets (30 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	27.0.3.64/27	27.0.3.64	27.0.3.65	27.0.3.94	27.0.3.95	30
2	27.0.3.96/27	27.0.3.96	27.0.3.97	27.0.3.126	27.0.3.127	30

Split 27.0.3.64/26 into 4 equal /28 subnets (14 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	27.0.3.64/28	27.0.3.64	27.0.3.65	27.0.3.78	27.0.3.79	14
2	27.0.3.80/28	27.0.3.80	27.0.3.81	27.0.3.94	27.0.3.95	14
3	27.0.3.96/28	27.0.3.96	27.0.3.97	27.0.3.110	27.0.3.111	14
4	27.0.3.112/28	27.0.3.112	27.0.3.113	27.0.3.126	27.0.3.127	14

Split 27.0.3.64/26 into 8 equal /29 subnets (6 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	27.0.3.64/29	27.0.3.64	27.0.3.65	27.0.3.70	27.0.3.71	6
2	27.0.3.72/29	27.0.3.72	27.0.3.73	27.0.3.78	27.0.3.79	6
3	27.0.3.80/29	27.0.3.80	27.0.3.81	27.0.3.86	27.0.3.87	6
4	27.0.3.88/29	27.0.3.88	27.0.3.89	27.0.3.94	27.0.3.95	6
5	27.0.3.96/29	27.0.3.96	27.0.3.97	27.0.3.102	27.0.3.103	6
6	27.0.3.104/29	27.0.3.104	27.0.3.105	27.0.3.110	27.0.3.111	6
7	27.0.3.112/29	27.0.3.112	27.0.3.113	27.0.3.118	27.0.3.119	6
8	27.0.3.120/29	27.0.3.120	27.0.3.121	27.0.3.126	27.0.3.127	6

Split 27.0.3.64/26 into 16 equal /30 subnets (2 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	27.0.3.64/30	27.0.3.64	27.0.3.65	27.0.3.66	27.0.3.67	2
2	27.0.3.68/30	27.0.3.68	27.0.3.69	27.0.3.70	27.0.3.71	2
3	27.0.3.72/30	27.0.3.72	27.0.3.73	27.0.3.74	27.0.3.75	2
4	27.0.3.76/30	27.0.3.76	27.0.3.77	27.0.3.78	27.0.3.79	2
5	27.0.3.80/30	27.0.3.80	27.0.3.81	27.0.3.82	27.0.3.83	2
6	27.0.3.84/30	27.0.3.84	27.0.3.85	27.0.3.86	27.0.3.87	2
7	27.0.3.88/30	27.0.3.88	27.0.3.89	27.0.3.90	27.0.3.91	2
8	27.0.3.92/30	27.0.3.92	27.0.3.93	27.0.3.94	27.0.3.95	2
9	27.0.3.96/30	27.0.3.96	27.0.3.97	27.0.3.98	27.0.3.99	2
10	27.0.3.100/30	27.0.3.100	27.0.3.101	27.0.3.102	27.0.3.103	2
11	27.0.3.104/30	27.0.3.104	27.0.3.105	27.0.3.106	27.0.3.107	2
12	27.0.3.108/30	27.0.3.108	27.0.3.109	27.0.3.110	27.0.3.111	2
13	27.0.3.112/30	27.0.3.112	27.0.3.113	27.0.3.114	27.0.3.115	2
14	27.0.3.116/30	27.0.3.116	27.0.3.117	27.0.3.118	27.0.3.119	2
15	27.0.3.120/30	27.0.3.120	27.0.3.121	27.0.3.122	27.0.3.123	2
16	27.0.3.124/30	27.0.3.124	27.0.3.125	27.0.3.126	27.0.3.127	2

IP Address Sample

Showing first 16 of 64 total IPs.

27.0.3.64 net

27.0.3.65

27.0.3.66

27.0.3.67

27.0.3.68

27.0.3.69

27.0.3.70

27.0.3.71

27.0.3.72

27.0.3.73

27.0.3.74

27.0.3.75

27.0.3.76

27.0.3.77

27.0.3.78

27.0.3.79

… 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 27.0.3.0/25 Sibling /26 block 27.0.3.0/26

Adjacent Prefix Sizes

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