39.2.86.0/23

Public

Class A — /23 prefix — 510 usable hosts

Network Address

39.2.86.0

Broadcast Address

39.2.87.255

Subnet Mask

255.255.254.0

Usable Hosts

510

First Usable IP

39.2.86.1

Last Usable IP

39.2.87.254

Total IPs

512

Prefix Length

/23

Network address — the base address of the block (39.2.86.0). All devices in this subnet share this prefix. Cannot be assigned to a host.

Broadcast address — packets sent to 39.2.87.255 are delivered to every device in the subnet. Also reserved — not assignable.

Usable hosts — the 510 addresses between those two that you can assign to servers, VMs, or interfaces.

Subnet mask — 255.255.254.0 is the dotted-decimal equivalent of /23. Older tools and Cisco configs use this format instead of CIDR slash notation.

Full Details

CIDR Notation	39.2.86.0/23
Network Address	39.2.86.0
Broadcast Address	39.2.87.255
Subnet Mask	255.255.254.0
Wildcard Mask	0.0.1.255
Prefix Length	/23
IP Address Class	Class A
Total IP Addresses	512
Usable Host Addresses	510
First Usable IP	39.2.86.1
Last Usable IP	39.2.87.254
Network (Hex)	0x27025600
Broadcast (Hex)	0x270257FF
Address Type	Public / Globally Routable

Binary Representation

Network Address

00100111.00000010 00100111.00000010.01010110.00000000

Subnet Mask

11111111.11111111.11111110.00000000

The first 23 bits (1s in the mask) identify the network. The remaining 9 bits identify hosts within the network.

Split into Equal Subnets

Split 39.2.86.0/23 into 2 equal /24 subnets (254 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	39.2.86.0/24	39.2.86.0	39.2.86.1	39.2.86.254	39.2.86.255	254
2	39.2.87.0/24	39.2.87.0	39.2.87.1	39.2.87.254	39.2.87.255	254

Split 39.2.86.0/23 into 4 equal /25 subnets (126 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	39.2.86.0/25	39.2.86.0	39.2.86.1	39.2.86.126	39.2.86.127	126
2	39.2.86.128/25	39.2.86.128	39.2.86.129	39.2.86.254	39.2.86.255	126
3	39.2.87.0/25	39.2.87.0	39.2.87.1	39.2.87.126	39.2.87.127	126
4	39.2.87.128/25	39.2.87.128	39.2.87.129	39.2.87.254	39.2.87.255	126

Split 39.2.86.0/23 into 8 equal /26 subnets (62 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	39.2.86.0/26	39.2.86.0	39.2.86.1	39.2.86.62	39.2.86.63	62
2	39.2.86.64/26	39.2.86.64	39.2.86.65	39.2.86.126	39.2.86.127	62
3	39.2.86.128/26	39.2.86.128	39.2.86.129	39.2.86.190	39.2.86.191	62
4	39.2.86.192/26	39.2.86.192	39.2.86.193	39.2.86.254	39.2.86.255	62
5	39.2.87.0/26	39.2.87.0	39.2.87.1	39.2.87.62	39.2.87.63	62
6	39.2.87.64/26	39.2.87.64	39.2.87.65	39.2.87.126	39.2.87.127	62
7	39.2.87.128/26	39.2.87.128	39.2.87.129	39.2.87.190	39.2.87.191	62
8	39.2.87.192/26	39.2.87.192	39.2.87.193	39.2.87.254	39.2.87.255	62

Split 39.2.86.0/23 into 16 equal /27 subnets (30 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	39.2.86.0/27	39.2.86.0	39.2.86.1	39.2.86.30	39.2.86.31	30
2	39.2.86.32/27	39.2.86.32	39.2.86.33	39.2.86.62	39.2.86.63	30
3	39.2.86.64/27	39.2.86.64	39.2.86.65	39.2.86.94	39.2.86.95	30
4	39.2.86.96/27	39.2.86.96	39.2.86.97	39.2.86.126	39.2.86.127	30
5	39.2.86.128/27	39.2.86.128	39.2.86.129	39.2.86.158	39.2.86.159	30
6	39.2.86.160/27	39.2.86.160	39.2.86.161	39.2.86.190	39.2.86.191	30
7	39.2.86.192/27	39.2.86.192	39.2.86.193	39.2.86.222	39.2.86.223	30
8	39.2.86.224/27	39.2.86.224	39.2.86.225	39.2.86.254	39.2.86.255	30
9	39.2.87.0/27	39.2.87.0	39.2.87.1	39.2.87.30	39.2.87.31	30
10	39.2.87.32/27	39.2.87.32	39.2.87.33	39.2.87.62	39.2.87.63	30
11	39.2.87.64/27	39.2.87.64	39.2.87.65	39.2.87.94	39.2.87.95	30
12	39.2.87.96/27	39.2.87.96	39.2.87.97	39.2.87.126	39.2.87.127	30
13	39.2.87.128/27	39.2.87.128	39.2.87.129	39.2.87.158	39.2.87.159	30
14	39.2.87.160/27	39.2.87.160	39.2.87.161	39.2.87.190	39.2.87.191	30
15	39.2.87.192/27	39.2.87.192	39.2.87.193	39.2.87.222	39.2.87.223	30
16	39.2.87.224/27	39.2.87.224	39.2.87.225	39.2.87.254	39.2.87.255	30

/23 Subnet Reference

Total IPs 512

Usable Hosts 510

Subnet Mask 255.255.254.0

Wildcard 0.0.1.255

Full /23 reference →

Related Ranges

Parent /22 block 39.2.84.0/22 Sibling /23 block 39.2.84.0/23

Adjacent Prefix Sizes

/21 2,046 hosts /22 1,022 hosts /23 510 hosts /24 254 hosts /25 126 hosts