239.2.31.128/26

Multicast RFC 5771

Class D (Multicast) — /26 prefix — 62 usable hosts

Network Address

239.2.31.128

Broadcast Address

239.2.31.191

Subnet Mask

255.255.255.192

Usable Hosts

First Usable IP

239.2.31.129

Last Usable IP

239.2.31.190

Total IPs

Prefix Length

/26

Network address — the base address of the block (239.2.31.128). All devices in this subnet share this prefix. Cannot be assigned to a host.

Broadcast address — packets sent to 239.2.31.191 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	239.2.31.128/26
Network Address	239.2.31.128
Broadcast Address	239.2.31.191
Subnet Mask	255.255.255.192
Wildcard Mask	0.0.0.63
Prefix Length	/26
IP Address Class	Class D (Multicast)
Total IP Addresses	64
Usable Host Addresses	62
First Usable IP	239.2.31.129
Last Usable IP	239.2.31.190
Network (Hex)	0xEF021F80
Broadcast (Hex)	0xEF021FBF
Governing RFC	RFC 5771
Address Type	Multicast

Binary Representation

Network Address

11101111.00000010.00011111 11101111.00000010.00011111.10000000

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 239.2.31.128/26 into 2 equal /27 subnets (30 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	239.2.31.128/27	239.2.31.128	239.2.31.129	239.2.31.158	239.2.31.159	30
2	239.2.31.160/27	239.2.31.160	239.2.31.161	239.2.31.190	239.2.31.191	30

Split 239.2.31.128/26 into 4 equal /28 subnets (14 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	239.2.31.128/28	239.2.31.128	239.2.31.129	239.2.31.142	239.2.31.143	14
2	239.2.31.144/28	239.2.31.144	239.2.31.145	239.2.31.158	239.2.31.159	14
3	239.2.31.160/28	239.2.31.160	239.2.31.161	239.2.31.174	239.2.31.175	14
4	239.2.31.176/28	239.2.31.176	239.2.31.177	239.2.31.190	239.2.31.191	14

Split 239.2.31.128/26 into 8 equal /29 subnets (6 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	239.2.31.128/29	239.2.31.128	239.2.31.129	239.2.31.134	239.2.31.135	6
2	239.2.31.136/29	239.2.31.136	239.2.31.137	239.2.31.142	239.2.31.143	6
3	239.2.31.144/29	239.2.31.144	239.2.31.145	239.2.31.150	239.2.31.151	6
4	239.2.31.152/29	239.2.31.152	239.2.31.153	239.2.31.158	239.2.31.159	6
5	239.2.31.160/29	239.2.31.160	239.2.31.161	239.2.31.166	239.2.31.167	6
6	239.2.31.168/29	239.2.31.168	239.2.31.169	239.2.31.174	239.2.31.175	6
7	239.2.31.176/29	239.2.31.176	239.2.31.177	239.2.31.182	239.2.31.183	6
8	239.2.31.184/29	239.2.31.184	239.2.31.185	239.2.31.190	239.2.31.191	6

Split 239.2.31.128/26 into 16 equal /30 subnets (2 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	239.2.31.128/30	239.2.31.128	239.2.31.129	239.2.31.130	239.2.31.131	2
2	239.2.31.132/30	239.2.31.132	239.2.31.133	239.2.31.134	239.2.31.135	2
3	239.2.31.136/30	239.2.31.136	239.2.31.137	239.2.31.138	239.2.31.139	2
4	239.2.31.140/30	239.2.31.140	239.2.31.141	239.2.31.142	239.2.31.143	2
5	239.2.31.144/30	239.2.31.144	239.2.31.145	239.2.31.146	239.2.31.147	2
6	239.2.31.148/30	239.2.31.148	239.2.31.149	239.2.31.150	239.2.31.151	2
7	239.2.31.152/30	239.2.31.152	239.2.31.153	239.2.31.154	239.2.31.155	2
8	239.2.31.156/30	239.2.31.156	239.2.31.157	239.2.31.158	239.2.31.159	2
9	239.2.31.160/30	239.2.31.160	239.2.31.161	239.2.31.162	239.2.31.163	2
10	239.2.31.164/30	239.2.31.164	239.2.31.165	239.2.31.166	239.2.31.167	2
11	239.2.31.168/30	239.2.31.168	239.2.31.169	239.2.31.170	239.2.31.171	2
12	239.2.31.172/30	239.2.31.172	239.2.31.173	239.2.31.174	239.2.31.175	2
13	239.2.31.176/30	239.2.31.176	239.2.31.177	239.2.31.178	239.2.31.179	2
14	239.2.31.180/30	239.2.31.180	239.2.31.181	239.2.31.182	239.2.31.183	2
15	239.2.31.184/30	239.2.31.184	239.2.31.185	239.2.31.186	239.2.31.187	2
16	239.2.31.188/30	239.2.31.188	239.2.31.189	239.2.31.190	239.2.31.191	2

IP Address Sample

Showing first 16 of 64 total IPs.

239.2.31.128 net

239.2.31.129

239.2.31.130

239.2.31.131

239.2.31.132

239.2.31.133

239.2.31.134

239.2.31.135

239.2.31.136

239.2.31.137

239.2.31.138

239.2.31.139

239.2.31.140

239.2.31.141

239.2.31.142

239.2.31.143

… 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 239.2.31.128/25 Sibling /26 block 239.2.31.192/26

Adjacent Prefix Sizes

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