IPRangeExplorer

30.4.0.0/15

Public

Class A — /15 prefix — 131,070 usable hosts

Network Address
30.4.0.0
Broadcast Address
30.5.255.255
Subnet Mask
255.254.0.0
Usable Hosts
131,070
First Usable IP
30.4.0.1
Last Usable IP
30.5.255.254
Total IPs
131,072
Prefix Length
/15

Network address — the base address of the block (30.4.0.0). All devices in this subnet share this prefix. Cannot be assigned to a host.

Broadcast address — packets sent to 30.5.255.255 are delivered to every device in the subnet. Also reserved — not assignable.

Usable hosts — the 131,070 addresses between those two that you can assign to servers, VMs, or interfaces.

Subnet mask — 255.254.0.0 is the dotted-decimal equivalent of /15. Older tools and Cisco configs use this format instead of CIDR slash notation.

Full Details

CIDR Notation 30.4.0.0/15
Network Address 30.4.0.0
Broadcast Address 30.5.255.255
Subnet Mask 255.254.0.0
Wildcard Mask 0.1.255.255
Prefix Length /15
IP Address Class Class A
Total IP Addresses 131,072
Usable Host Addresses 131,070
First Usable IP 30.4.0.1
Last Usable IP 30.5.255.254
Network (Hex) 0x1E040000
Broadcast (Hex) 0x1E05FFFF
Address Type Public / Globally Routable

Binary Representation

Network Address
00011110 00011110.00000100.00000000.00000000
Subnet Mask
11111111.11111110.00000000.00000000

The first 15 bits (1s in the mask) identify the network. The remaining 17 bits identify hosts within the network.

Split into Equal Subnets

Split 30.4.0.0/15 into 2 equal /16 subnets (65,534 usable hosts each).

# CIDR Network First Usable Last Usable Broadcast Hosts
1 30.4.0.0/16 30.4.0.0 30.4.0.1 30.4.255.254 30.4.255.255 65,534
2 30.5.0.0/16 30.5.0.0 30.5.0.1 30.5.255.254 30.5.255.255 65,534

/15 Subnet Reference

Total IPs 131,072
Usable Hosts 131,070
Subnet Mask 255.254.0.0
Wildcard 0.1.255.255
Full /15 reference →

Related Ranges

Parent /14 block 30.4.0.0/14 Sibling /15 block 30.6.0.0/15

Adjacent Prefix Sizes

/13 524,286 hosts /14 262,142 hosts /15 131,070 hosts /16 65,534 hosts /17 32,766 hosts

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