To effectively contact a subject network in the United States, one should utilize a multi-faceted approach that combines both traditional and modern communication methods. The first step is to identify the key individuals within the network and gather their contact information. This can be achieved through LinkedIn, industry directories, or personal referrals. Once contact information is obtained, the following strategies can be employed:

1. Email: Send a personalized email that clearly states the purpose of the outreach and includes a brief introduction. Personalization is crucial, as it shows genuine interest and respect for the recipient's time.

2. LinkedIn: Use LinkedIn to connect with individuals within the network. Personalize the connection request with a brief message explaining the reason for the connection.

3. Social Media: Platforms like Twitter and Instagram can be used to engage with the network by sharing relevant content or participating in discussions.

4. Networking Events: Attend industry-specific events, conferences, or meetups to meet members of the network in person.

5. Direct Mail: For a more formal approach, consider sending a well-crafted letter or brochure through traditional mail.

According to a study by LinkedIn, professionals are 5 times more likely to get a response to an InMail than to an email sent from their personal email address. This highlights the importance of leveraging LinkedIn for professional networking. Additionally, a report by the U.S. Chamber of Commerce indicates that 80% of jobs are filled through networking, emphasizing the significance of building and maintaining a strong professional network.

In conclusion, to contact a subject network in the United States, one should utilize a combination of email, LinkedIn, social media, networking events, and direct mail. Personalization and a strategic approach are key to successful outreach.