National Investigations Inc.

New York's private investigation directory holds 65 listings. Every one has a phone number, and 63 also list a website, so calling or clicking through rarely hits a dead end. Zip 10001 has 8 firms, the largest cluster on the page, with smaller groups in 10016, 10018, 10010, 10017, 10022, 10036, and 10038.

None of these listings carry a Sponsored tag, since paid placement isn't active yet for this category in New York, so order here reflects record entry, not preference. SiteCity hasn't visited or rated any firm shown; use the page to gather names and call two or three before deciding. If you run one of these firms and details are missing, you can claim the listing to fill in a website or update contact info yourself.