128.188.33.64/26

Public

Class B — /26 prefix — 62 usable hosts

Network Address

128.188.33.64

Broadcast Address

128.188.33.127

Subnet Mask

255.255.255.192

Usable Hosts

First Usable IP

128.188.33.65

Last Usable IP

128.188.33.126

Total IPs

Prefix Length

/26

Network address — the base address of the block (128.188.33.64). All devices in this subnet share this prefix. Cannot be assigned to a host.

Broadcast address — packets sent to 128.188.33.127 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	128.188.33.64/26
Network Address	128.188.33.64
Broadcast Address	128.188.33.127
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	128.188.33.65
Last Usable IP	128.188.33.126
Network (Hex)	0x80BC2140
Broadcast (Hex)	0x80BC217F
Address Type	Public / Globally Routable

Binary Representation

Network Address

10000000.10111100.00100001 10000000.10111100.00100001.01000000

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 128.188.33.64/26 into 2 equal /27 subnets (30 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	128.188.33.64/27	128.188.33.64	128.188.33.65	128.188.33.94	128.188.33.95	30
2	128.188.33.96/27	128.188.33.96	128.188.33.97	128.188.33.126	128.188.33.127	30

Split 128.188.33.64/26 into 4 equal /28 subnets (14 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	128.188.33.64/28	128.188.33.64	128.188.33.65	128.188.33.78	128.188.33.79	14
2	128.188.33.80/28	128.188.33.80	128.188.33.81	128.188.33.94	128.188.33.95	14
3	128.188.33.96/28	128.188.33.96	128.188.33.97	128.188.33.110	128.188.33.111	14
4	128.188.33.112/28	128.188.33.112	128.188.33.113	128.188.33.126	128.188.33.127	14

Split 128.188.33.64/26 into 8 equal /29 subnets (6 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	128.188.33.64/29	128.188.33.64	128.188.33.65	128.188.33.70	128.188.33.71	6
2	128.188.33.72/29	128.188.33.72	128.188.33.73	128.188.33.78	128.188.33.79	6
3	128.188.33.80/29	128.188.33.80	128.188.33.81	128.188.33.86	128.188.33.87	6
4	128.188.33.88/29	128.188.33.88	128.188.33.89	128.188.33.94	128.188.33.95	6
5	128.188.33.96/29	128.188.33.96	128.188.33.97	128.188.33.102	128.188.33.103	6
6	128.188.33.104/29	128.188.33.104	128.188.33.105	128.188.33.110	128.188.33.111	6
7	128.188.33.112/29	128.188.33.112	128.188.33.113	128.188.33.118	128.188.33.119	6
8	128.188.33.120/29	128.188.33.120	128.188.33.121	128.188.33.126	128.188.33.127	6

Split 128.188.33.64/26 into 16 equal /30 subnets (2 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	128.188.33.64/30	128.188.33.64	128.188.33.65	128.188.33.66	128.188.33.67	2
2	128.188.33.68/30	128.188.33.68	128.188.33.69	128.188.33.70	128.188.33.71	2
3	128.188.33.72/30	128.188.33.72	128.188.33.73	128.188.33.74	128.188.33.75	2
4	128.188.33.76/30	128.188.33.76	128.188.33.77	128.188.33.78	128.188.33.79	2
5	128.188.33.80/30	128.188.33.80	128.188.33.81	128.188.33.82	128.188.33.83	2
6	128.188.33.84/30	128.188.33.84	128.188.33.85	128.188.33.86	128.188.33.87	2
7	128.188.33.88/30	128.188.33.88	128.188.33.89	128.188.33.90	128.188.33.91	2
8	128.188.33.92/30	128.188.33.92	128.188.33.93	128.188.33.94	128.188.33.95	2
9	128.188.33.96/30	128.188.33.96	128.188.33.97	128.188.33.98	128.188.33.99	2
10	128.188.33.100/30	128.188.33.100	128.188.33.101	128.188.33.102	128.188.33.103	2
11	128.188.33.104/30	128.188.33.104	128.188.33.105	128.188.33.106	128.188.33.107	2
12	128.188.33.108/30	128.188.33.108	128.188.33.109	128.188.33.110	128.188.33.111	2
13	128.188.33.112/30	128.188.33.112	128.188.33.113	128.188.33.114	128.188.33.115	2
14	128.188.33.116/30	128.188.33.116	128.188.33.117	128.188.33.118	128.188.33.119	2
15	128.188.33.120/30	128.188.33.120	128.188.33.121	128.188.33.122	128.188.33.123	2
16	128.188.33.124/30	128.188.33.124	128.188.33.125	128.188.33.126	128.188.33.127	2

IP Address Sample

Showing first 16 of 64 total IPs.

128.188.33.64 net

128.188.33.65

128.188.33.66

128.188.33.67

128.188.33.68

128.188.33.69

128.188.33.70

128.188.33.71

128.188.33.72

128.188.33.73

128.188.33.74

128.188.33.75

128.188.33.76

128.188.33.77

128.188.33.78

128.188.33.79

… 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 128.188.33.0/25 Sibling /26 block 128.188.33.0/26

Adjacent Prefix Sizes

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