151.78.99.64/26

Public

Class B — /26 prefix — 62 usable hosts

Network Address

151.78.99.64

Broadcast Address

151.78.99.127

Subnet Mask

255.255.255.192

Usable Hosts

First Usable IP

151.78.99.65

Last Usable IP

151.78.99.126

Total IPs

Prefix Length

/26

Network address — the base address of the block (151.78.99.64). All devices in this subnet share this prefix. Cannot be assigned to a host.

Broadcast address — packets sent to 151.78.99.127 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	151.78.99.64/26
Network Address	151.78.99.64
Broadcast Address	151.78.99.127
Subnet Mask	255.255.255.192
Wildcard Mask	0.0.0.63
Prefix Length	/26
IP Address Class	Class B
Total IP Addresses	64
Usable Host Addresses	62
First Usable IP	151.78.99.65
Last Usable IP	151.78.99.126
Network (Hex)	0x974E6340
Broadcast (Hex)	0x974E637F
Address Type	Public / Globally Routable

Binary Representation

Network Address

10010111.01001110.01100011 10010111.01001110.01100011.01000000

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 151.78.99.64/26 into 2 equal /27 subnets (30 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	151.78.99.64/27	151.78.99.64	151.78.99.65	151.78.99.94	151.78.99.95	30
2	151.78.99.96/27	151.78.99.96	151.78.99.97	151.78.99.126	151.78.99.127	30

Split 151.78.99.64/26 into 4 equal /28 subnets (14 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	151.78.99.64/28	151.78.99.64	151.78.99.65	151.78.99.78	151.78.99.79	14
2	151.78.99.80/28	151.78.99.80	151.78.99.81	151.78.99.94	151.78.99.95	14
3	151.78.99.96/28	151.78.99.96	151.78.99.97	151.78.99.110	151.78.99.111	14
4	151.78.99.112/28	151.78.99.112	151.78.99.113	151.78.99.126	151.78.99.127	14

Split 151.78.99.64/26 into 8 equal /29 subnets (6 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	151.78.99.64/29	151.78.99.64	151.78.99.65	151.78.99.70	151.78.99.71	6
2	151.78.99.72/29	151.78.99.72	151.78.99.73	151.78.99.78	151.78.99.79	6
3	151.78.99.80/29	151.78.99.80	151.78.99.81	151.78.99.86	151.78.99.87	6
4	151.78.99.88/29	151.78.99.88	151.78.99.89	151.78.99.94	151.78.99.95	6
5	151.78.99.96/29	151.78.99.96	151.78.99.97	151.78.99.102	151.78.99.103	6
6	151.78.99.104/29	151.78.99.104	151.78.99.105	151.78.99.110	151.78.99.111	6
7	151.78.99.112/29	151.78.99.112	151.78.99.113	151.78.99.118	151.78.99.119	6
8	151.78.99.120/29	151.78.99.120	151.78.99.121	151.78.99.126	151.78.99.127	6

Split 151.78.99.64/26 into 16 equal /30 subnets (2 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	151.78.99.64/30	151.78.99.64	151.78.99.65	151.78.99.66	151.78.99.67	2
2	151.78.99.68/30	151.78.99.68	151.78.99.69	151.78.99.70	151.78.99.71	2
3	151.78.99.72/30	151.78.99.72	151.78.99.73	151.78.99.74	151.78.99.75	2
4	151.78.99.76/30	151.78.99.76	151.78.99.77	151.78.99.78	151.78.99.79	2
5	151.78.99.80/30	151.78.99.80	151.78.99.81	151.78.99.82	151.78.99.83	2
6	151.78.99.84/30	151.78.99.84	151.78.99.85	151.78.99.86	151.78.99.87	2
7	151.78.99.88/30	151.78.99.88	151.78.99.89	151.78.99.90	151.78.99.91	2
8	151.78.99.92/30	151.78.99.92	151.78.99.93	151.78.99.94	151.78.99.95	2
9	151.78.99.96/30	151.78.99.96	151.78.99.97	151.78.99.98	151.78.99.99	2
10	151.78.99.100/30	151.78.99.100	151.78.99.101	151.78.99.102	151.78.99.103	2
11	151.78.99.104/30	151.78.99.104	151.78.99.105	151.78.99.106	151.78.99.107	2
12	151.78.99.108/30	151.78.99.108	151.78.99.109	151.78.99.110	151.78.99.111	2
13	151.78.99.112/30	151.78.99.112	151.78.99.113	151.78.99.114	151.78.99.115	2
14	151.78.99.116/30	151.78.99.116	151.78.99.117	151.78.99.118	151.78.99.119	2
15	151.78.99.120/30	151.78.99.120	151.78.99.121	151.78.99.122	151.78.99.123	2
16	151.78.99.124/30	151.78.99.124	151.78.99.125	151.78.99.126	151.78.99.127	2

IP Address Sample

Showing first 16 of 64 total IPs.

151.78.99.64 net

151.78.99.65

151.78.99.66

151.78.99.67

151.78.99.68

151.78.99.69

151.78.99.70

151.78.99.71

151.78.99.72

151.78.99.73

151.78.99.74

151.78.99.75

151.78.99.76

151.78.99.77

151.78.99.78

151.78.99.79

… 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 151.78.99.0/25 Sibling /26 block 151.78.99.0/26

Adjacent Prefix Sizes

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