85.2.0.0/20

Public

Class A — /20 prefix — 4,094 usable hosts

Network Address

85.2.0.0

Broadcast Address

85.2.15.255

Subnet Mask

255.255.240.0

Usable Hosts

4,094

First Usable IP

85.2.0.1

Last Usable IP

85.2.15.254

Total IPs

4,096

Prefix Length

/20

Network address — the base address of the block (85.2.0.0). All devices in this subnet share this prefix. Cannot be assigned to a host.

Broadcast address — packets sent to 85.2.15.255 are delivered to every device in the subnet. Also reserved — not assignable.

Usable hosts — the 4,094 addresses between those two that you can assign to servers, VMs, or interfaces.

Subnet mask — 255.255.240.0 is the dotted-decimal equivalent of /20. Older tools and Cisco configs use this format instead of CIDR slash notation.

Full Details

CIDR Notation	85.2.0.0/20
Network Address	85.2.0.0
Broadcast Address	85.2.15.255
Subnet Mask	255.255.240.0
Wildcard Mask	0.0.15.255
Prefix Length	/20
IP Address Class	Class A
Total IP Addresses	4,096
Usable Host Addresses	4,094
First Usable IP	85.2.0.1
Last Usable IP	85.2.15.254
Network (Hex)	0x55020000
Broadcast (Hex)	0x55020FFF
Address Type	Public / Globally Routable

Binary Representation

Network Address

01010101.00000010 01010101.00000010.00000000.00000000

Subnet Mask

11111111.11111111.11110000.00000000

The first 20 bits (1s in the mask) identify the network. The remaining 12 bits identify hosts within the network.

Split into Equal Subnets

Split 85.2.0.0/20 into 2 equal /21 subnets (2,046 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	85.2.0.0/21	85.2.0.0	85.2.0.1	85.2.7.254	85.2.7.255	2,046
2	85.2.8.0/21	85.2.8.0	85.2.8.1	85.2.15.254	85.2.15.255	2,046

Split 85.2.0.0/20 into 4 equal /22 subnets (1,022 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	85.2.0.0/22	85.2.0.0	85.2.0.1	85.2.3.254	85.2.3.255	1,022
2	85.2.4.0/22	85.2.4.0	85.2.4.1	85.2.7.254	85.2.7.255	1,022
3	85.2.8.0/22	85.2.8.0	85.2.8.1	85.2.11.254	85.2.11.255	1,022
4	85.2.12.0/22	85.2.12.0	85.2.12.1	85.2.15.254	85.2.15.255	1,022

Split 85.2.0.0/20 into 8 equal /23 subnets (510 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	85.2.0.0/23	85.2.0.0	85.2.0.1	85.2.1.254	85.2.1.255	510
2	85.2.2.0/23	85.2.2.0	85.2.2.1	85.2.3.254	85.2.3.255	510
3	85.2.4.0/23	85.2.4.0	85.2.4.1	85.2.5.254	85.2.5.255	510
4	85.2.6.0/23	85.2.6.0	85.2.6.1	85.2.7.254	85.2.7.255	510
5	85.2.8.0/23	85.2.8.0	85.2.8.1	85.2.9.254	85.2.9.255	510
6	85.2.10.0/23	85.2.10.0	85.2.10.1	85.2.11.254	85.2.11.255	510
7	85.2.12.0/23	85.2.12.0	85.2.12.1	85.2.13.254	85.2.13.255	510
8	85.2.14.0/23	85.2.14.0	85.2.14.1	85.2.15.254	85.2.15.255	510

Split 85.2.0.0/20 into 16 equal /24 subnets (254 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	85.2.0.0/24	85.2.0.0	85.2.0.1	85.2.0.254	85.2.0.255	254
2	85.2.1.0/24	85.2.1.0	85.2.1.1	85.2.1.254	85.2.1.255	254
3	85.2.2.0/24	85.2.2.0	85.2.2.1	85.2.2.254	85.2.2.255	254
4	85.2.3.0/24	85.2.3.0	85.2.3.1	85.2.3.254	85.2.3.255	254
5	85.2.4.0/24	85.2.4.0	85.2.4.1	85.2.4.254	85.2.4.255	254
6	85.2.5.0/24	85.2.5.0	85.2.5.1	85.2.5.254	85.2.5.255	254
7	85.2.6.0/24	85.2.6.0	85.2.6.1	85.2.6.254	85.2.6.255	254
8	85.2.7.0/24	85.2.7.0	85.2.7.1	85.2.7.254	85.2.7.255	254
9	85.2.8.0/24	85.2.8.0	85.2.8.1	85.2.8.254	85.2.8.255	254
10	85.2.9.0/24	85.2.9.0	85.2.9.1	85.2.9.254	85.2.9.255	254
11	85.2.10.0/24	85.2.10.0	85.2.10.1	85.2.10.254	85.2.10.255	254
12	85.2.11.0/24	85.2.11.0	85.2.11.1	85.2.11.254	85.2.11.255	254
13	85.2.12.0/24	85.2.12.0	85.2.12.1	85.2.12.254	85.2.12.255	254
14	85.2.13.0/24	85.2.13.0	85.2.13.1	85.2.13.254	85.2.13.255	254
15	85.2.14.0/24	85.2.14.0	85.2.14.1	85.2.14.254	85.2.14.255	254
16	85.2.15.0/24	85.2.15.0	85.2.15.1	85.2.15.254	85.2.15.255	254

/20 Subnet Reference

Total IPs 4,096

Usable Hosts 4,094

Subnet Mask 255.255.240.0

Wildcard 0.0.15.255

Full /20 reference →

Related Ranges

Parent /19 block 85.2.0.0/19 Sibling /20 block 85.2.16.0/20

Adjacent Prefix Sizes

/18 16,382 hosts /19 8,190 hosts /20 4,094 hosts /21 2,046 hosts /22 1,022 hosts