Terms of Service

Last updated: April 21, 2026

These Terms of Service ("Terms") govern your use of the TailNumber mobile application (the "App"). By installing, accessing, or using the App, you agree to these Terms.

What TailNumber is

TailNumber is a mobile app that surfaces public aircraft registration, airman certificate, and aviation safety information published by the U.S. Federal Aviation Administration (FAA) and the National Transportation Safety Board (NTSB). We re-format and expose this public-record data in a read-only, searchable form.

TailNumber is not affiliated with, endorsed by, or authorized by the FAA, NTSB, or any other U.S. government agency. We are an independent third-party product that consumes public datasets.

Data accuracy — important disclaimer

The FAA and NTSB are the authoritative sources of the data displayed in the App. We make reasonable efforts to ingest their data promptly, but:

There is a lag between when records are updated in the FAA/NTSB systems and when those changes appear in TailNumber.
The FAA's Releasable Airmen Database respects per-certificate opt- outs, meaning some airmen or certificates may not appear.
Transcription, formatting, or interpretation errors are possible.

Do not rely on TailNumber as the sole source for decisions with safety, legal, or financial consequences, including flight-planning decisions, airworthiness determinations, pilot qualification verifications, or purchase decisions. Always verify against registry.faa.gov and carol.ntsb.gov before acting.

Account and authentication

You may use the App's free features without an account. To save an aircraft watchlist, enable push alerts, or sync across devices, you can sign in with an email one-time code. You are responsible for the security of the email account used for sign-in.

Subscriptions (TailNumber Pro)

TailNumber Pro is an auto-renewing subscription that unlocks additional features (owner search, airmen search, NTSB search, safety-data cards, push alerts, and fleet watchlists).

Subscriptions are billed monthly ($4.99 USD) or annually ($29.99 USD) at the rate shown in the App at the time of purchase.
New subscribers get a 7-day free trial. Cancel during the trial to avoid being charged.
Your subscription renews automatically at the end of each period unless cancelled at least 24 hours before renewal.
Manage or cancel your subscription in Settings → Apple ID → Subscriptions on your iPhone, or App Store app → Account → Subscriptions. We cannot issue cancellations on your behalf.
Prices may change. Price changes apply to renewals after you're notified and given an opportunity to cancel.
Refunds are handled by Apple per their standard policy.

Acceptable use

You agree not to:

Scrape, bulk-export, or redistribute data from the App to circumvent the direct use of the FAA/NTSB data sources.
Reverse-engineer or attempt to extract our database structure.
Use the App to harass, stalk, or harm any individual — including by aggregating airman records for malicious purposes.
Interfere with the App's operation or the operation of any other user's access.

Intellectual property

The App's code, design, branding, and user-interface elements are owned by TailNumber. The underlying aircraft registration and safety data is public-record and not owned by us. You may use the App to view data for personal or professional aviation purposes.

Disclaimer of warranties

THE APP IS PROVIDED "AS IS" AND "AS AVAILABLE," WITHOUT WARRANTIES OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, NON-INFRINGEMENT, OR THE ACCURACY, COMPLETENESS, OR TIMELINESS OF DATA. WE DISCLAIM ALL WARRANTIES TO THE FULLEST EXTENT PERMITTED BY LAW.

Limitation of liability

TO THE FULLEST EXTENT PERMITTED BY LAW, TAILNUMBER SHALL NOT BE LIABLE FOR ANY INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL, OR PUNITIVE DAMAGES ARISING OUT OF OR RELATED TO YOUR USE OF THE APP, INCLUDING DAMAGES RESULTING FROM RELIANCE ON DATA DISPLAYED IN THE APP. OUR TOTAL LIABILITY FOR ANY CLAIM SHALL NOT EXCEED THE GREATER OF (A) THE AMOUNT YOU PAID US IN THE 12 MONTHS PRECEDING THE CLAIM OR (B) $50 USD.

Governing law

These Terms are governed by the laws of the State of Missouri, United States, without regard to conflict-of-law principles. Any dispute arising from these Terms or the App shall be resolved in the state or federal courts located in St. Louis County, Missouri.

Changes

We may update these Terms from time to time. Material changes will be announced in the App. Continued use after changes constitutes acceptance.

Contact

support@tailnumberapp.com

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