How an aircraft is registered in the United States

01 What the registration programme is for

The Aircraft Registration Branch sits inside the FAA, and its work is to keep a public record of who owns which civil aircraft. Ownership is the point. A registration certificate is not a licence to fly and it is not a maintenance approval; it is the government's record that a specific aircraft belongs to a specific person or company, under an eligibility rule written in 14 CFR Part 47. The FAA publishes that the eligibility of an aircraft for registration is defined in that part, and points readers to its Register an Aircraft page for the detail.

The registry has also moved part of its work online. Individual aircraft owners can now complete self-guided registration applications, upload legal and supplemental documents, receive auto-generated notifications, request N-numbers, pay through modernised online options, get instant payment confirmation and sign applications digitally. The FAA states that these services will be continuously improved, which is a plain way of saying the online side is being built out in stages rather than finished.

How the paper arrives matters too. The FAA accepts documents with digital signatures by email, sent as an attachment to a dedicated address, while documents signed in ink must still travel by U.S. Post Office or commercial delivery service. Signatures need the typed or printed name of each signer in or next to the signature block. An application form without that printed name comes back.

02 Where the N-number comes from

The letter at the front of every US civil registration is older than the FAA itself. The United States received "N" as its nationality designator under the International Air Navigation Convention held in 1919. That convention set out a marking scheme of one letter for nationality, a hyphen, then four identity letters, and the five characters together were meant to serve as the aircraft's radio call sign.

So the N is not decoration and it is not chosen by the owner. It is a country code, allocated at a diplomatic table more than a century ago, still doing the same job on a contemporary business jet. The registration programme administers the numbers that follow it: reserving them, renewing them and changing them, all of which sit inside the same branch that handles the certificates.

03 What a certificate of registration records

The certificate is the document an owner actually holds. It carries the aircraft's registration information, which the registry maintains and makes searchable, and it carries an expiration date. That date changed. Effective January 23, 2023, registration certificates expiring after that date are automatically extended by an additional four years, and a new certificate with the new expiration date is sent to the owner. The registry began reissuing certificates for aircraft in valid status on that date, and stated its intention to reissue the certificates affected by the rule no later than November 30, 2023, mailed to the address in its records. The FAA notes that the address on file is what the certificate follows, which is why the agency also publishes a separate form for an owner's change of address.

The certificate is also the hinge for a second document. The FAA states that when an aircraft's registration has expired, its airworthiness certification is considered ineffective, and without registration the aircraft is not authorised for flight. Restoring registration does not require a new airworthiness certificate: once registration is restored, an airworthiness certificate that was never surrendered, revoked or terminated becomes effective again, provided the aircraft otherwise meets its maintenance and inspection requirements. Two pieces of paper, then, that fail and recover together, even though they are issued for entirely different reasons.

For aircraft owners and the people who work on their files, the registry publishes an aircraft registration inquiry as the starting point: registration information can be searched there, and individual aircraft records can be ordered by mail, by fax or online.

04 What replaced the letter of extension

No. The registry stopped issuing letters of extension effective January 23, 2023. The FAA revised 14 CFR 47.31(c)(1) and removed the time limit within which it had to either issue a letter extending temporary operating authority or deny an application. What replaced the letter is a rule about how long the application itself lasts. The Aircraft Registration Application, the pink copy, stays valid until the applicant receives the registration certificate, until the FAA denies the application, or until twelve months have passed with the registration still pending on the aircraft. Whichever comes first ends it.

05 How long the paperwork takes

The FAA processes documents in the order they arrive, following statutory requirements, and publishes the current processing date so an applicant can see where the queue stands. That is the answer to the question owners ask most often, and it is deliberately not a promise. If you want to know whether the branch has your documents at all, the registry's Document Index search on the Aircraft Inquiry page shows what has been received.

Some registration questions are not about the aircraft at all but about who is allowed to own it. The registry publishes separate guidance for aircraft owned by a limited liability company and for aircraft held under a personal or family trust, along with forms covering an affidavit of ownership, a bill of sale, a security agreement and a certificate of repossession. Dealer registrations, heir-at-law situations, exports and imports each have their own form. The list is long because ownership in aviation is rarely simple, and the record has to survive a sale, a death, a lender or a border.

06 What the record is asked to do later

Registration information is a public tool, not only a filing cabinet. Buyers check registration status before money moves, which is why the registry offers searches for valid or in-question registration and its information on clear title. Lenders record security agreements through the same branch. When an aircraft is exported, a cancellation follows. If an aircraft is stolen, the FAA directs the owner to local law enforcement and asks that the theft be reported to the National Crime Information Center, which triggers notifications to the right government offices; if enough time passes that a return is no longer expected, the owner writes to the Aircraft Registration Branch to cancel the registration, describing the aircraft fully and signing in ink with a stated title.

The branch keeps office hours from Monday to Friday, 7:30 a.m. to 4:00 p.m. Central Time, and answers questions by telephone, fax and email, with separate mailing addresses for regular mail and for commercial delivery. Unmanned aircraft sit outside this route: registration for drones weighing less than 55 pounds runs through the FAA's drone portal rather than the aircraft registry.

07 Where the certificate fits in the larger paper chain

Registration is one item in a sequence that starts before an aircraft ever flies and continues for as long as it does. Airworthiness certification, type certificates, repair station approvals and the parts that move between them all depend on records that can be checked by name. The registry is where the aircraft's own name is written down, and it is not the only place the paper has to hold. The programmes that run on those records are gathered under federal programs that shape aviation work, and the airport grant programme shows the other end of the same federal paper chain, where money rather than a certificate changes hands.

One limit is worth naming. The registry's pages describe what it receives and how it processes it, but the working detail of eligibility, ownership structures and processing timelines lives behind Part 47 and the current processing date, not in any single explanation. The FAA's Aircraft Registration page publishes the branch's full contact routes and the running list of services it has moved online, so an owner can check the state of the programme before filing anything.

Start with the aircraft's current registration status on the registry inquiry, then read the processing date before sending a single page.

FAA Aircraft Registration Branch. A page of the Federal Aviation Administration at faa.gov covering the Civil Aviation Registry's aircraft registration work. It lists the application, renewal, bill of sale and security forms the branch accepts, the contact routes and office hours, the news items affecting owners, and short answers on renewal, extension letters, eligibility, exports, imports, stolen aircraft and drone registration. The branch directs readers to Part 47 and to the registry inquiry for eligibility detail and current status.

08 Where to continue

The pages below take how an aircraft is registered in the United States a step further inside federal programs, beginning with How federal airport grants decide what gets built, then move on to the next trade. Each one names the agency that holds the rule it describes.