MapCIDR

Map CIDR ranges to IP addresses by ProjectDiscovery with expansion and filtering capabilities

Recon & OSINT8 commands

#cidr#network#ip#projectdiscovery#recon

Installation

1Install using Go

2Verify installation

# Using Go
go install github.com/projectdiscovery/mapcidr/cmd/mapcidr@latest

# Verify
mapcidr --version

Basic Usage

Expand CIDR ranges to individual IP addresses with various filtering options

# Expand a single CIDR range
mapcidr -cl 192.168.0.0/24

# Expand multiple CIDRs from file
mapcidr -l cidrs.txt

# Count IPs in a range
mapcidr -cl 10.0.0.0/16 -count

# Filter by octet pattern
mapcidr -cl 192.168.0.0/16 -o 192.168.1

# Output to file
mapcidr -cl 192.168.0.0/24 -o ips.txt

# Aggregate IPs to CIDR notation
mapcidr -aggregate -l ips.txt

Command Reference

8 commands

1CIDR list (comma-separated)

-cl

2File containing CIDR ranges

-l

3Output file

-o

4Count IPs in range

-count

5Aggregate IPs to CIDR notation

-aggregate

6Filter IPs by pattern

-filter-ip

7Silent mode

-silent

8Show version

-version

When to Use

Expanding CIDR ranges for mass scanning

Counting IPs in subnet ranges

Generating IP lists from network blocks

Aggregating scattered IPs back to CIDR notation

Filtering IPs by specific octet patterns

Notes & Tips

Part of the ProjectDiscovery ecosystem

Can handle both IPv4 and IPv6 ranges

Use -silent for clean output piped to other tools

Combine with httpx or naabu for service discovery

Common Errors & Solutions

Invalid CIDR format

Ensure CIDR notation is correct (e.g., 192.168.0.0/24)

No output

Check that the CIDR range is valid and accessible

# Expand a single CIDR range mapcidr -cl 192.168.0.0/24 # Expand multiple CIDRs from file mapcidr -l cidrs.txt # Count IPs in a range mapcidr -cl 10.0.0.0/16 -count # Filter by octet pattern mapcidr -cl 192.168.0.0/16 -o 192.168.1 # Output to file mapcidr -cl 192.168.0.0/24 -o ips.txt # Aggregate IPs to CIDR notation mapcidr -aggregate -l ips.txt