# Email addresses
[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}
# US phone numbers (various formats)
\b\d{3}[-.\s]?\d{3}[-.\s]?\d{4}\b
# US Social Security Numbers
\b\d{3}-\d{2}-\d{4}\b
# Credit card numbers (basic 16-digit pattern)
\b\d{4}[-\s]?\d{4}[-\s]?\d{4}[-\s]?\d{4}\b
# IP addresses (IPv4)
\b\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\b
