18.245.139.0/26

Public

Class A — /26 prefix — 62 usable hosts

Network Address

18.245.139.0

Broadcast Address

18.245.139.63

Subnet Mask

255.255.255.192

Usable Hosts

First Usable IP

18.245.139.1

Last Usable IP

18.245.139.62

Total IPs

Prefix Length

/26

Network address — the base address of the block (18.245.139.0). All devices in this subnet share this prefix. Cannot be assigned to a host.

Broadcast address — packets sent to 18.245.139.63 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	18.245.139.0/26
Network Address	18.245.139.0
Broadcast Address	18.245.139.63
Subnet Mask	255.255.255.192
Wildcard Mask	0.0.0.63
Prefix Length	/26
IP Address Class	Class A
Total IP Addresses	64
Usable Host Addresses	62
First Usable IP	18.245.139.1
Last Usable IP	18.245.139.62
Network (Hex)	0x12F58B00
Broadcast (Hex)	0x12F58B3F
Address Type	Public / Globally Routable

Binary Representation

Network Address

00010010.11110101.10001011 00010010.11110101.10001011.00000000

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 18.245.139.0/26 into 2 equal /27 subnets (30 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	18.245.139.0/27	18.245.139.0	18.245.139.1	18.245.139.30	18.245.139.31	30
2	18.245.139.32/27	18.245.139.32	18.245.139.33	18.245.139.62	18.245.139.63	30

Split 18.245.139.0/26 into 4 equal /28 subnets (14 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	18.245.139.0/28	18.245.139.0	18.245.139.1	18.245.139.14	18.245.139.15	14
2	18.245.139.16/28	18.245.139.16	18.245.139.17	18.245.139.30	18.245.139.31	14
3	18.245.139.32/28	18.245.139.32	18.245.139.33	18.245.139.46	18.245.139.47	14
4	18.245.139.48/28	18.245.139.48	18.245.139.49	18.245.139.62	18.245.139.63	14

Split 18.245.139.0/26 into 8 equal /29 subnets (6 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	18.245.139.0/29	18.245.139.0	18.245.139.1	18.245.139.6	18.245.139.7	6
2	18.245.139.8/29	18.245.139.8	18.245.139.9	18.245.139.14	18.245.139.15	6
3	18.245.139.16/29	18.245.139.16	18.245.139.17	18.245.139.22	18.245.139.23	6
4	18.245.139.24/29	18.245.139.24	18.245.139.25	18.245.139.30	18.245.139.31	6
5	18.245.139.32/29	18.245.139.32	18.245.139.33	18.245.139.38	18.245.139.39	6
6	18.245.139.40/29	18.245.139.40	18.245.139.41	18.245.139.46	18.245.139.47	6
7	18.245.139.48/29	18.245.139.48	18.245.139.49	18.245.139.54	18.245.139.55	6
8	18.245.139.56/29	18.245.139.56	18.245.139.57	18.245.139.62	18.245.139.63	6

Split 18.245.139.0/26 into 16 equal /30 subnets (2 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	18.245.139.0/30	18.245.139.0	18.245.139.1	18.245.139.2	18.245.139.3	2
2	18.245.139.4/30	18.245.139.4	18.245.139.5	18.245.139.6	18.245.139.7	2
3	18.245.139.8/30	18.245.139.8	18.245.139.9	18.245.139.10	18.245.139.11	2
4	18.245.139.12/30	18.245.139.12	18.245.139.13	18.245.139.14	18.245.139.15	2
5	18.245.139.16/30	18.245.139.16	18.245.139.17	18.245.139.18	18.245.139.19	2
6	18.245.139.20/30	18.245.139.20	18.245.139.21	18.245.139.22	18.245.139.23	2
7	18.245.139.24/30	18.245.139.24	18.245.139.25	18.245.139.26	18.245.139.27	2
8	18.245.139.28/30	18.245.139.28	18.245.139.29	18.245.139.30	18.245.139.31	2
9	18.245.139.32/30	18.245.139.32	18.245.139.33	18.245.139.34	18.245.139.35	2
10	18.245.139.36/30	18.245.139.36	18.245.139.37	18.245.139.38	18.245.139.39	2
11	18.245.139.40/30	18.245.139.40	18.245.139.41	18.245.139.42	18.245.139.43	2
12	18.245.139.44/30	18.245.139.44	18.245.139.45	18.245.139.46	18.245.139.47	2
13	18.245.139.48/30	18.245.139.48	18.245.139.49	18.245.139.50	18.245.139.51	2
14	18.245.139.52/30	18.245.139.52	18.245.139.53	18.245.139.54	18.245.139.55	2
15	18.245.139.56/30	18.245.139.56	18.245.139.57	18.245.139.58	18.245.139.59	2
16	18.245.139.60/30	18.245.139.60	18.245.139.61	18.245.139.62	18.245.139.63	2

IP Address Sample

Showing first 16 of 64 total IPs.

18.245.139.0 net

18.245.139.1

18.245.139.2

18.245.139.3

18.245.139.4

18.245.139.5

18.245.139.6

18.245.139.7

18.245.139.8

18.245.139.9

18.245.139.10

18.245.139.11

18.245.139.12

18.245.139.13

18.245.139.14

18.245.139.15

… 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 18.245.139.0/25 Sibling /26 block 18.245.139.64/26

Adjacent Prefix Sizes

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