173.3.91.0/26

Public

Class B — /26 prefix — 62 usable hosts

Network Address

173.3.91.0

Broadcast Address

173.3.91.63

Subnet Mask

255.255.255.192

Usable Hosts

First Usable IP

173.3.91.1

Last Usable IP

173.3.91.62

Total IPs

Prefix Length

/26

Network address — the base address of the block (173.3.91.0). All devices in this subnet share this prefix. Cannot be assigned to a host.

Broadcast address — packets sent to 173.3.91.63 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	173.3.91.0/26
Network Address	173.3.91.0
Broadcast Address	173.3.91.63
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	173.3.91.1
Last Usable IP	173.3.91.62
Network (Hex)	0xAD035B00
Broadcast (Hex)	0xAD035B3F
Address Type	Public / Globally Routable

Binary Representation

Network Address

10101101.00000011.01011011 10101101.00000011.01011011.00000000

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 173.3.91.0/26 into 2 equal /27 subnets (30 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	173.3.91.0/27	173.3.91.0	173.3.91.1	173.3.91.30	173.3.91.31	30
2	173.3.91.32/27	173.3.91.32	173.3.91.33	173.3.91.62	173.3.91.63	30

Split 173.3.91.0/26 into 4 equal /28 subnets (14 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	173.3.91.0/28	173.3.91.0	173.3.91.1	173.3.91.14	173.3.91.15	14
2	173.3.91.16/28	173.3.91.16	173.3.91.17	173.3.91.30	173.3.91.31	14
3	173.3.91.32/28	173.3.91.32	173.3.91.33	173.3.91.46	173.3.91.47	14
4	173.3.91.48/28	173.3.91.48	173.3.91.49	173.3.91.62	173.3.91.63	14

Split 173.3.91.0/26 into 8 equal /29 subnets (6 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	173.3.91.0/29	173.3.91.0	173.3.91.1	173.3.91.6	173.3.91.7	6
2	173.3.91.8/29	173.3.91.8	173.3.91.9	173.3.91.14	173.3.91.15	6
3	173.3.91.16/29	173.3.91.16	173.3.91.17	173.3.91.22	173.3.91.23	6
4	173.3.91.24/29	173.3.91.24	173.3.91.25	173.3.91.30	173.3.91.31	6
5	173.3.91.32/29	173.3.91.32	173.3.91.33	173.3.91.38	173.3.91.39	6
6	173.3.91.40/29	173.3.91.40	173.3.91.41	173.3.91.46	173.3.91.47	6
7	173.3.91.48/29	173.3.91.48	173.3.91.49	173.3.91.54	173.3.91.55	6
8	173.3.91.56/29	173.3.91.56	173.3.91.57	173.3.91.62	173.3.91.63	6

Split 173.3.91.0/26 into 16 equal /30 subnets (2 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	173.3.91.0/30	173.3.91.0	173.3.91.1	173.3.91.2	173.3.91.3	2
2	173.3.91.4/30	173.3.91.4	173.3.91.5	173.3.91.6	173.3.91.7	2
3	173.3.91.8/30	173.3.91.8	173.3.91.9	173.3.91.10	173.3.91.11	2
4	173.3.91.12/30	173.3.91.12	173.3.91.13	173.3.91.14	173.3.91.15	2
5	173.3.91.16/30	173.3.91.16	173.3.91.17	173.3.91.18	173.3.91.19	2
6	173.3.91.20/30	173.3.91.20	173.3.91.21	173.3.91.22	173.3.91.23	2
7	173.3.91.24/30	173.3.91.24	173.3.91.25	173.3.91.26	173.3.91.27	2
8	173.3.91.28/30	173.3.91.28	173.3.91.29	173.3.91.30	173.3.91.31	2
9	173.3.91.32/30	173.3.91.32	173.3.91.33	173.3.91.34	173.3.91.35	2
10	173.3.91.36/30	173.3.91.36	173.3.91.37	173.3.91.38	173.3.91.39	2
11	173.3.91.40/30	173.3.91.40	173.3.91.41	173.3.91.42	173.3.91.43	2
12	173.3.91.44/30	173.3.91.44	173.3.91.45	173.3.91.46	173.3.91.47	2
13	173.3.91.48/30	173.3.91.48	173.3.91.49	173.3.91.50	173.3.91.51	2
14	173.3.91.52/30	173.3.91.52	173.3.91.53	173.3.91.54	173.3.91.55	2
15	173.3.91.56/30	173.3.91.56	173.3.91.57	173.3.91.58	173.3.91.59	2
16	173.3.91.60/30	173.3.91.60	173.3.91.61	173.3.91.62	173.3.91.63	2

IP Address Sample

Showing first 16 of 64 total IPs.

173.3.91.0 net

173.3.91.1

173.3.91.2

173.3.91.3

173.3.91.4

173.3.91.5

173.3.91.6

173.3.91.7

173.3.91.8

173.3.91.9

173.3.91.10

173.3.91.11

173.3.91.12

173.3.91.13

173.3.91.14

173.3.91.15

… 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 173.3.91.0/25 Sibling /26 block 173.3.91.64/26

Adjacent Prefix Sizes

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