1.111.217.0/25

Public

Class A — /25 prefix — 126 usable hosts

Network Address

1.111.217.0

Broadcast Address

1.111.217.127

Subnet Mask

255.255.255.128

Usable Hosts

126

First Usable IP

1.111.217.1

Last Usable IP

1.111.217.126

Total IPs

128

Prefix Length

/25

Network address — the base address of the block (1.111.217.0). All devices in this subnet share this prefix. Cannot be assigned to a host.

Broadcast address — packets sent to 1.111.217.127 are delivered to every device in the subnet. Also reserved — not assignable.

Usable hosts — the 126 addresses between those two that you can assign to servers, VMs, or interfaces.

Subnet mask — 255.255.255.128 is the dotted-decimal equivalent of /25. Older tools and Cisco configs use this format instead of CIDR slash notation.

Full Details

CIDR Notation	1.111.217.0/25
Network Address	1.111.217.0
Broadcast Address	1.111.217.127
Subnet Mask	255.255.255.128
Wildcard Mask	0.0.0.127
Prefix Length	/25
IP Address Class	Class A
Total IP Addresses	128
Usable Host Addresses	126
First Usable IP	1.111.217.1
Last Usable IP	1.111.217.126
Network (Hex)	0x016FD900
Broadcast (Hex)	0x016FD97F
Address Type	Public / Globally Routable

Binary Representation

Network Address

00000001.01101111.11011001 00000001.01101111.11011001.00000000

Subnet Mask

11111111.11111111.11111111.10000000

The first 25 bits (1s in the mask) identify the network. The remaining 7 bits identify hosts within the network.

Split into Equal Subnets

Split 1.111.217.0/25 into 2 equal /26 subnets (62 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	1.111.217.0/26	1.111.217.0	1.111.217.1	1.111.217.62	1.111.217.63	62
2	1.111.217.64/26	1.111.217.64	1.111.217.65	1.111.217.126	1.111.217.127	62

Split 1.111.217.0/25 into 4 equal /27 subnets (30 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	1.111.217.0/27	1.111.217.0	1.111.217.1	1.111.217.30	1.111.217.31	30
2	1.111.217.32/27	1.111.217.32	1.111.217.33	1.111.217.62	1.111.217.63	30
3	1.111.217.64/27	1.111.217.64	1.111.217.65	1.111.217.94	1.111.217.95	30
4	1.111.217.96/27	1.111.217.96	1.111.217.97	1.111.217.126	1.111.217.127	30

Split 1.111.217.0/25 into 8 equal /28 subnets (14 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	1.111.217.0/28	1.111.217.0	1.111.217.1	1.111.217.14	1.111.217.15	14
2	1.111.217.16/28	1.111.217.16	1.111.217.17	1.111.217.30	1.111.217.31	14
3	1.111.217.32/28	1.111.217.32	1.111.217.33	1.111.217.46	1.111.217.47	14
4	1.111.217.48/28	1.111.217.48	1.111.217.49	1.111.217.62	1.111.217.63	14
5	1.111.217.64/28	1.111.217.64	1.111.217.65	1.111.217.78	1.111.217.79	14
6	1.111.217.80/28	1.111.217.80	1.111.217.81	1.111.217.94	1.111.217.95	14
7	1.111.217.96/28	1.111.217.96	1.111.217.97	1.111.217.110	1.111.217.111	14
8	1.111.217.112/28	1.111.217.112	1.111.217.113	1.111.217.126	1.111.217.127	14

Split 1.111.217.0/25 into 16 equal /29 subnets (6 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	1.111.217.0/29	1.111.217.0	1.111.217.1	1.111.217.6	1.111.217.7	6
2	1.111.217.8/29	1.111.217.8	1.111.217.9	1.111.217.14	1.111.217.15	6
3	1.111.217.16/29	1.111.217.16	1.111.217.17	1.111.217.22	1.111.217.23	6
4	1.111.217.24/29	1.111.217.24	1.111.217.25	1.111.217.30	1.111.217.31	6
5	1.111.217.32/29	1.111.217.32	1.111.217.33	1.111.217.38	1.111.217.39	6
6	1.111.217.40/29	1.111.217.40	1.111.217.41	1.111.217.46	1.111.217.47	6
7	1.111.217.48/29	1.111.217.48	1.111.217.49	1.111.217.54	1.111.217.55	6
8	1.111.217.56/29	1.111.217.56	1.111.217.57	1.111.217.62	1.111.217.63	6
9	1.111.217.64/29	1.111.217.64	1.111.217.65	1.111.217.70	1.111.217.71	6
10	1.111.217.72/29	1.111.217.72	1.111.217.73	1.111.217.78	1.111.217.79	6
11	1.111.217.80/29	1.111.217.80	1.111.217.81	1.111.217.86	1.111.217.87	6
12	1.111.217.88/29	1.111.217.88	1.111.217.89	1.111.217.94	1.111.217.95	6
13	1.111.217.96/29	1.111.217.96	1.111.217.97	1.111.217.102	1.111.217.103	6
14	1.111.217.104/29	1.111.217.104	1.111.217.105	1.111.217.110	1.111.217.111	6
15	1.111.217.112/29	1.111.217.112	1.111.217.113	1.111.217.118	1.111.217.119	6
16	1.111.217.120/29	1.111.217.120	1.111.217.121	1.111.217.126	1.111.217.127	6

IP Address Sample

Showing first 16 of 128 total IPs.

1.111.217.0 net

1.111.217.1

1.111.217.2

1.111.217.3

1.111.217.4

1.111.217.5

1.111.217.6

1.111.217.7

1.111.217.8

1.111.217.9

1.111.217.10

1.111.217.11

1.111.217.12

1.111.217.13

1.111.217.14

1.111.217.15

… 112 more IPs …

/25 Subnet Reference

Total IPs 128

Usable Hosts 126

Subnet Mask 255.255.255.128

Wildcard 0.0.0.127

Full /25 reference →

Related Ranges

Parent /24 block 1.111.217.0/24 Sibling /25 block 1.111.217.128/25

Adjacent Prefix Sizes

/23 510 hosts /24 254 hosts /25 126 hosts /26 62 hosts /27 30 hosts