31.69.217.0/25

Public

Class A — /25 prefix — 126 usable hosts

Network Address

31.69.217.0

Broadcast Address

31.69.217.127

Subnet Mask

255.255.255.128

Usable Hosts

126

First Usable IP

31.69.217.1

Last Usable IP

31.69.217.126

Total IPs

128

Prefix Length

/25

Network address — the base address of the block (31.69.217.0). All devices in this subnet share this prefix. Cannot be assigned to a host.

Broadcast address — packets sent to 31.69.217.127 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	31.69.217.0/25
Network Address	31.69.217.0
Broadcast Address	31.69.217.127
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	31.69.217.1
Last Usable IP	31.69.217.126
Network (Hex)	0x1F45D900
Broadcast (Hex)	0x1F45D97F
Address Type	Public / Globally Routable

Binary Representation

Network Address

00011111.01000101.11011001 00011111.01000101.11011001.00000000

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 31.69.217.0/25 into 2 equal /26 subnets (62 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	31.69.217.0/26	31.69.217.0	31.69.217.1	31.69.217.62	31.69.217.63	62
2	31.69.217.64/26	31.69.217.64	31.69.217.65	31.69.217.126	31.69.217.127	62

Split 31.69.217.0/25 into 4 equal /27 subnets (30 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	31.69.217.0/27	31.69.217.0	31.69.217.1	31.69.217.30	31.69.217.31	30
2	31.69.217.32/27	31.69.217.32	31.69.217.33	31.69.217.62	31.69.217.63	30
3	31.69.217.64/27	31.69.217.64	31.69.217.65	31.69.217.94	31.69.217.95	30
4	31.69.217.96/27	31.69.217.96	31.69.217.97	31.69.217.126	31.69.217.127	30

Split 31.69.217.0/25 into 8 equal /28 subnets (14 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	31.69.217.0/28	31.69.217.0	31.69.217.1	31.69.217.14	31.69.217.15	14
2	31.69.217.16/28	31.69.217.16	31.69.217.17	31.69.217.30	31.69.217.31	14
3	31.69.217.32/28	31.69.217.32	31.69.217.33	31.69.217.46	31.69.217.47	14
4	31.69.217.48/28	31.69.217.48	31.69.217.49	31.69.217.62	31.69.217.63	14
5	31.69.217.64/28	31.69.217.64	31.69.217.65	31.69.217.78	31.69.217.79	14
6	31.69.217.80/28	31.69.217.80	31.69.217.81	31.69.217.94	31.69.217.95	14
7	31.69.217.96/28	31.69.217.96	31.69.217.97	31.69.217.110	31.69.217.111	14
8	31.69.217.112/28	31.69.217.112	31.69.217.113	31.69.217.126	31.69.217.127	14

Split 31.69.217.0/25 into 16 equal /29 subnets (6 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	31.69.217.0/29	31.69.217.0	31.69.217.1	31.69.217.6	31.69.217.7	6
2	31.69.217.8/29	31.69.217.8	31.69.217.9	31.69.217.14	31.69.217.15	6
3	31.69.217.16/29	31.69.217.16	31.69.217.17	31.69.217.22	31.69.217.23	6
4	31.69.217.24/29	31.69.217.24	31.69.217.25	31.69.217.30	31.69.217.31	6
5	31.69.217.32/29	31.69.217.32	31.69.217.33	31.69.217.38	31.69.217.39	6
6	31.69.217.40/29	31.69.217.40	31.69.217.41	31.69.217.46	31.69.217.47	6
7	31.69.217.48/29	31.69.217.48	31.69.217.49	31.69.217.54	31.69.217.55	6
8	31.69.217.56/29	31.69.217.56	31.69.217.57	31.69.217.62	31.69.217.63	6
9	31.69.217.64/29	31.69.217.64	31.69.217.65	31.69.217.70	31.69.217.71	6
10	31.69.217.72/29	31.69.217.72	31.69.217.73	31.69.217.78	31.69.217.79	6
11	31.69.217.80/29	31.69.217.80	31.69.217.81	31.69.217.86	31.69.217.87	6
12	31.69.217.88/29	31.69.217.88	31.69.217.89	31.69.217.94	31.69.217.95	6
13	31.69.217.96/29	31.69.217.96	31.69.217.97	31.69.217.102	31.69.217.103	6
14	31.69.217.104/29	31.69.217.104	31.69.217.105	31.69.217.110	31.69.217.111	6
15	31.69.217.112/29	31.69.217.112	31.69.217.113	31.69.217.118	31.69.217.119	6
16	31.69.217.120/29	31.69.217.120	31.69.217.121	31.69.217.126	31.69.217.127	6

IP Address Sample

Showing first 16 of 128 total IPs.

31.69.217.0 net

31.69.217.1

31.69.217.2

31.69.217.3

31.69.217.4

31.69.217.5

31.69.217.6

31.69.217.7

31.69.217.8

31.69.217.9

31.69.217.10

31.69.217.11

31.69.217.12

31.69.217.13

31.69.217.14

31.69.217.15

… 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 31.69.217.0/24 Sibling /25 block 31.69.217.128/25

Adjacent Prefix Sizes

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