203.91.42.64/26

Public

Class C — /26 prefix — 62 usable hosts

Network Address

203.91.42.64

Broadcast Address

203.91.42.127

Subnet Mask

255.255.255.192

Usable Hosts

First Usable IP

203.91.42.65

Last Usable IP

203.91.42.126

Total IPs

Prefix Length

/26

Network address — the base address of the block (203.91.42.64). All devices in this subnet share this prefix. Cannot be assigned to a host.

Broadcast address — packets sent to 203.91.42.127 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	203.91.42.64/26
Network Address	203.91.42.64
Broadcast Address	203.91.42.127
Subnet Mask	255.255.255.192
Wildcard Mask	0.0.0.63
Prefix Length	/26
IP Address Class	Class C
Total IP Addresses	64
Usable Host Addresses	62
First Usable IP	203.91.42.65
Last Usable IP	203.91.42.126
Network (Hex)	0xCB5B2A40
Broadcast (Hex)	0xCB5B2A7F
Address Type	Public / Globally Routable

Binary Representation

Network Address

11001011.01011011.00101010 11001011.01011011.00101010.01000000

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 203.91.42.64/26 into 2 equal /27 subnets (30 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	203.91.42.64/27	203.91.42.64	203.91.42.65	203.91.42.94	203.91.42.95	30
2	203.91.42.96/27	203.91.42.96	203.91.42.97	203.91.42.126	203.91.42.127	30

Split 203.91.42.64/26 into 4 equal /28 subnets (14 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	203.91.42.64/28	203.91.42.64	203.91.42.65	203.91.42.78	203.91.42.79	14
2	203.91.42.80/28	203.91.42.80	203.91.42.81	203.91.42.94	203.91.42.95	14
3	203.91.42.96/28	203.91.42.96	203.91.42.97	203.91.42.110	203.91.42.111	14
4	203.91.42.112/28	203.91.42.112	203.91.42.113	203.91.42.126	203.91.42.127	14

Split 203.91.42.64/26 into 8 equal /29 subnets (6 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	203.91.42.64/29	203.91.42.64	203.91.42.65	203.91.42.70	203.91.42.71	6
2	203.91.42.72/29	203.91.42.72	203.91.42.73	203.91.42.78	203.91.42.79	6
3	203.91.42.80/29	203.91.42.80	203.91.42.81	203.91.42.86	203.91.42.87	6
4	203.91.42.88/29	203.91.42.88	203.91.42.89	203.91.42.94	203.91.42.95	6
5	203.91.42.96/29	203.91.42.96	203.91.42.97	203.91.42.102	203.91.42.103	6
6	203.91.42.104/29	203.91.42.104	203.91.42.105	203.91.42.110	203.91.42.111	6
7	203.91.42.112/29	203.91.42.112	203.91.42.113	203.91.42.118	203.91.42.119	6
8	203.91.42.120/29	203.91.42.120	203.91.42.121	203.91.42.126	203.91.42.127	6

Split 203.91.42.64/26 into 16 equal /30 subnets (2 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	203.91.42.64/30	203.91.42.64	203.91.42.65	203.91.42.66	203.91.42.67	2
2	203.91.42.68/30	203.91.42.68	203.91.42.69	203.91.42.70	203.91.42.71	2
3	203.91.42.72/30	203.91.42.72	203.91.42.73	203.91.42.74	203.91.42.75	2
4	203.91.42.76/30	203.91.42.76	203.91.42.77	203.91.42.78	203.91.42.79	2
5	203.91.42.80/30	203.91.42.80	203.91.42.81	203.91.42.82	203.91.42.83	2
6	203.91.42.84/30	203.91.42.84	203.91.42.85	203.91.42.86	203.91.42.87	2
7	203.91.42.88/30	203.91.42.88	203.91.42.89	203.91.42.90	203.91.42.91	2
8	203.91.42.92/30	203.91.42.92	203.91.42.93	203.91.42.94	203.91.42.95	2
9	203.91.42.96/30	203.91.42.96	203.91.42.97	203.91.42.98	203.91.42.99	2
10	203.91.42.100/30	203.91.42.100	203.91.42.101	203.91.42.102	203.91.42.103	2
11	203.91.42.104/30	203.91.42.104	203.91.42.105	203.91.42.106	203.91.42.107	2
12	203.91.42.108/30	203.91.42.108	203.91.42.109	203.91.42.110	203.91.42.111	2
13	203.91.42.112/30	203.91.42.112	203.91.42.113	203.91.42.114	203.91.42.115	2
14	203.91.42.116/30	203.91.42.116	203.91.42.117	203.91.42.118	203.91.42.119	2
15	203.91.42.120/30	203.91.42.120	203.91.42.121	203.91.42.122	203.91.42.123	2
16	203.91.42.124/30	203.91.42.124	203.91.42.125	203.91.42.126	203.91.42.127	2

IP Address Sample

Showing first 16 of 64 total IPs.

203.91.42.64 net

203.91.42.65

203.91.42.66

203.91.42.67

203.91.42.68

203.91.42.69

203.91.42.70

203.91.42.71

203.91.42.72

203.91.42.73

203.91.42.74

203.91.42.75

203.91.42.76

203.91.42.77

203.91.42.78

203.91.42.79

… 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 203.91.42.0/25 Sibling /26 block 203.91.42.0/26

Adjacent Prefix Sizes

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