Everything about CFIUSCheck — the data, the analysis, access tiers, and what the results mean for CFIUS counsel and M&A practitioners.
The Service
What does CFIUSCheck do? +
CFIUSCheck calculates the straight-line distance from a user-supplied parcel centroid to every installation listed on the CFIUS Appendix A (31 CFR Part 802), using primary-source government coordinates. It returns a Part 1 threshold check (1-mile), a Part 2 threshold check (100-mile), and a Part 3 ICBM field county check against the 48 counties covering the three active missile wings. Results include a full proximity table, an interactive map with range rings, and a printable white-paper PDF report.
Is this legal advice? +
No. CFIUSCheck is an informational tool only. Results do not constitute legal advice, a legal opinion, or a determination of CFIUS filing obligations.
CFIUS jurisdiction depends on multiple factors beyond proximity, including transaction structure, the identity of the foreign person, and applicable exemptions. Proximity to an Appendix A installation does not automatically require a CFIUS filing. Absence of proximity does not eliminate all CFIUS considerations. Consult qualified CFIUS counsel for filing determinations.
How current is the data? +
The CFIUS Appendix A installation list reflects the December 2024 revision — the most recent as of publication. Installation coordinates are from the DoD MIRTA dataset, August 2025. USDA AFIDA holdings data is from calendar year 2024. Law Firm Plan subscribers receive dataset update notifications when a new Appendix A revision is published.
How is distance calculated? +
Distance is calculated using the Haversine great-circle formula from the query point (parcel centroid) to the centroid of each Appendix A installation. This is point-to-point, not boundary-to-boundary. For large installations, the actual boundary may be closer than the reported distance. The Haversine result is noted as conservative in the report methodology. All 219 active CONUS installations are checked on every query.
What is the Part 3 ICBM county check? +
31 CFR Part 802 Appendix A covers 48 counties associated with the three active ICBM missile wings: the 90th Missile Wing (F.E. Warren AFB — Wyoming, Nebraska, Colorado), the 341st Missile Wing (Malmstrom AFB — Montana), and the 91st Missile Wing (Minot AFB — North Dakota). Coverage for these counties is county-level, not radius-based — the entire county is covered regardless of proximity to a specific installation. CFIUSCheck checks the query coordinates against NOAA county centroid data to identify which county the parcel is in, then matches that county against the 48-county ICBM list.
Can I use a report in client files or CFIUS submissions? +
Reports are generated from primary-source government data, are timestamped, include a unique report ID, and cite their methodology in full. They are suitable for inclusion in client due diligence files and as supporting documentation in CFIUS submissions. They are not a substitute for legal analysis by qualified CFIUS counsel. Per the Terms of Use, reports generated for a subscribing client may be used in client files and regulatory submissions for that client’s matter.
Access & Billing
What are the access options? +
Free 3 free analyses — enter your email in the analysis tool, no card required. You receive an email confirming your remaining queries.
$99 Basic Report — single analysis, one-time payment. 24-hour access token.
$249 Enhanced Report — single analysis with AFIDA holdings proximity and historical regime analysis. 48-hour access token.
Trial Law Firm Plan 7-day trial — card captured at checkout but not charged until day 8. Cancel before day 8 and pay nothing.
$1,499/mo Law Firm Plan — unlimited analyses for the subscribing organisation. Persistent login, no payment gate.
How does the 7-day free trial work? +
When you select the Law Firm Plan and complete checkout, Stripe captures your card details but does not charge it for 7 days. You receive a welcome email that states your trial end date and your billing date. During the trial your account has full unlimited access. If you cancel before the trial ends, you will not be charged. To cancel, reply to your welcome email and we will send a Stripe customer portal link within one business day.
You will receive a reminder email before your trial converts to a paid subscription. You can also cancel at any time via the customer portal link.
What happens when my 3 free analyses run out? +
After your third free analysis you will receive an email with subscription options. The payment gate will appear on your next visit. Your 3 free analyses are tied to your email address and reset after 90 days. To continue immediately, select a one-time report plan ($99/$249) or start a Law Firm Plan trial from the payment gate.
How do I log in to my subscription account? +
Go to
cfiuscheck.com/login.html and enter the email address you used at checkout. Click “Access my account.” No password is needed — your email is your credential. Your login token is stored locally in your browser for 30 days. If you clear your browser data or use a new device, simply log in again with your email.
I forgot which email I used. What do I do? +
Write to
contact@cfiuscheck.com and we will look up your account by name or firm. We can also update the email address on your account if needed.
How do I cancel my subscription? +
Reply to your welcome email or write to
contact@cfiuscheck.com and we will send a Stripe customer portal link. Cancellation takes effect at the end of your current billing period. You retain full access until that date. No prorated refunds are issued for partial months except as required by law.
Do you offer complimentary access for reporters or researchers? +
Yes. Journalists, academic researchers, and regulatory staff covering CFIUS and foreign investment policy may request complimentary access by writing to
contact@cfiuscheck.com. Include your name, affiliation, and a brief description of how you intend to use the tool.
Technical
Can I enter an address instead of coordinates? +
Yes. The “Geocode & Analyze” tab accepts any U.S. address. The tool geocodes it via OpenStreetMap Nominatim and automatically populates the coordinate fields. For ICBM field counties, the tool also attempts to identify the county FIPS code from the coordinates. If the geocode result is imprecise, you can correct the coordinates manually before running the analysis.
How do I save or print the report? +
Click the “Print / Save as PDF” button on any report. The page switches to a white-paper layout with 4cm margins, navy typography, and color-coded risk indicators suitable for client files. In Chrome, enable “Background graphics” in the print dialog (More settings) to ensure the map tiles and table header colours print correctly. Firefox and Safari print backgrounds by default.
What data sources does CFIUSCheck use? +
All sources are primary-source U.S. government datasets:
· CFIUS Appendix A: 31 CFR Part 802, December 2024 revision (Treasury/CFIUS)
· Installation coordinates: DoD Military Installation Resilience and Threat Analysis (MIRTA), August 2025
· ICBM county mapping: 90th MW (Warren AFB), 341st MW (Malmstrom AFB), 91st MW (Minot AFB)
· County FIPS and centroids: NOAA county centroid dataset, 3,352 U.S. counties
· AFIDA holdings (Enhanced tier): USDA Agricultural Foreign Investment Disclosure Act, calendar year 2024
The underlying research is publicly available at
doi.org/10.2139/ssrn.6525938.