31.91.16.64/26

Public

Class A — /26 prefix — 62 usable hosts

Network Address

31.91.16.64

Broadcast Address

31.91.16.127

Subnet Mask

255.255.255.192

Usable Hosts

First Usable IP

31.91.16.65

Last Usable IP

31.91.16.126

Total IPs

Prefix Length

/26

Network address — the base address of the block (31.91.16.64). All devices in this subnet share this prefix. Cannot be assigned to a host.

Broadcast address — packets sent to 31.91.16.127 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	31.91.16.64/26
Network Address	31.91.16.64
Broadcast Address	31.91.16.127
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	31.91.16.65
Last Usable IP	31.91.16.126
Network (Hex)	0x1F5B1040
Broadcast (Hex)	0x1F5B107F
Address Type	Public / Globally Routable

Binary Representation

Network Address

00011111.01011011.00010000 00011111.01011011.00010000.01000000

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 31.91.16.64/26 into 2 equal /27 subnets (30 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	31.91.16.64/27	31.91.16.64	31.91.16.65	31.91.16.94	31.91.16.95	30
2	31.91.16.96/27	31.91.16.96	31.91.16.97	31.91.16.126	31.91.16.127	30

Split 31.91.16.64/26 into 4 equal /28 subnets (14 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	31.91.16.64/28	31.91.16.64	31.91.16.65	31.91.16.78	31.91.16.79	14
2	31.91.16.80/28	31.91.16.80	31.91.16.81	31.91.16.94	31.91.16.95	14
3	31.91.16.96/28	31.91.16.96	31.91.16.97	31.91.16.110	31.91.16.111	14
4	31.91.16.112/28	31.91.16.112	31.91.16.113	31.91.16.126	31.91.16.127	14

Split 31.91.16.64/26 into 8 equal /29 subnets (6 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	31.91.16.64/29	31.91.16.64	31.91.16.65	31.91.16.70	31.91.16.71	6
2	31.91.16.72/29	31.91.16.72	31.91.16.73	31.91.16.78	31.91.16.79	6
3	31.91.16.80/29	31.91.16.80	31.91.16.81	31.91.16.86	31.91.16.87	6
4	31.91.16.88/29	31.91.16.88	31.91.16.89	31.91.16.94	31.91.16.95	6
5	31.91.16.96/29	31.91.16.96	31.91.16.97	31.91.16.102	31.91.16.103	6
6	31.91.16.104/29	31.91.16.104	31.91.16.105	31.91.16.110	31.91.16.111	6
7	31.91.16.112/29	31.91.16.112	31.91.16.113	31.91.16.118	31.91.16.119	6
8	31.91.16.120/29	31.91.16.120	31.91.16.121	31.91.16.126	31.91.16.127	6

Split 31.91.16.64/26 into 16 equal /30 subnets (2 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	31.91.16.64/30	31.91.16.64	31.91.16.65	31.91.16.66	31.91.16.67	2
2	31.91.16.68/30	31.91.16.68	31.91.16.69	31.91.16.70	31.91.16.71	2
3	31.91.16.72/30	31.91.16.72	31.91.16.73	31.91.16.74	31.91.16.75	2
4	31.91.16.76/30	31.91.16.76	31.91.16.77	31.91.16.78	31.91.16.79	2
5	31.91.16.80/30	31.91.16.80	31.91.16.81	31.91.16.82	31.91.16.83	2
6	31.91.16.84/30	31.91.16.84	31.91.16.85	31.91.16.86	31.91.16.87	2
7	31.91.16.88/30	31.91.16.88	31.91.16.89	31.91.16.90	31.91.16.91	2
8	31.91.16.92/30	31.91.16.92	31.91.16.93	31.91.16.94	31.91.16.95	2
9	31.91.16.96/30	31.91.16.96	31.91.16.97	31.91.16.98	31.91.16.99	2
10	31.91.16.100/30	31.91.16.100	31.91.16.101	31.91.16.102	31.91.16.103	2
11	31.91.16.104/30	31.91.16.104	31.91.16.105	31.91.16.106	31.91.16.107	2
12	31.91.16.108/30	31.91.16.108	31.91.16.109	31.91.16.110	31.91.16.111	2
13	31.91.16.112/30	31.91.16.112	31.91.16.113	31.91.16.114	31.91.16.115	2
14	31.91.16.116/30	31.91.16.116	31.91.16.117	31.91.16.118	31.91.16.119	2
15	31.91.16.120/30	31.91.16.120	31.91.16.121	31.91.16.122	31.91.16.123	2
16	31.91.16.124/30	31.91.16.124	31.91.16.125	31.91.16.126	31.91.16.127	2

IP Address Sample

Showing first 16 of 64 total IPs.

31.91.16.64 net

31.91.16.65

31.91.16.66

31.91.16.67

31.91.16.68

31.91.16.69

31.91.16.70

31.91.16.71

31.91.16.72

31.91.16.73

31.91.16.74

31.91.16.75

31.91.16.76

31.91.16.77

31.91.16.78

31.91.16.79

… 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 31.91.16.0/25 Sibling /26 block 31.91.16.0/26

Adjacent Prefix Sizes

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