To register a Maritime Mobile Service Identity (MMSI), first identify the boat’s flag state and whether it will communicate with foreign ports. In the United States, a recreational vessel that stays domestic and does not require an FCC ship-station license may obtain an MMSI through an authorized private agent such as BoatUS. A vessel that visits or communicates with foreign ports, or otherwise requires licensing, must use the Federal Communications Commission (FCC) ship-station licensing process. Canadian vessels apply through Innovation, Science and Economic Development Canada (ISED), following Canadian Coast Guard direction. Never invent a number: the FCC states that “Self-assigning an MMSI is prohibited.”
What an MMSI number is and why registration matters
An MMSI is a nine-digit identity assigned to a vessel or maritime station. Digital Selective Calling (DSC) radios, shipborne universal AIS transponders and INMARSAT ship earth stations use it to identify the transmitting vessel to other stations and rescue services. The number is programmed into compatible equipment; it is not a product, radio license by itself, or substitute for a vessel-registration document.
As an Amazon Associate I earn from qualifying purchases.
When you press a DSC distress button, make a routine DSC call or transmit AIS data, the equipment sends the programmed identity. An incorrect or duplicated number can direct a call to the wrong vessel, prevent a return call, or complicate a rescue response. Obtain the number from the authority or authorized agent responsible for your vessel before enabling the equipment.
Recommended Free Tools
Choose the correct registration route first
The right application depends on four facts: the boat’s flag or documentation country, where it will operate, the type of operation, and whether the station legally needs a radio license. The United States and Canada have different systems, and a private registration service in one country cannot replace the flag state’s process in another.
#1 Best Overall
- Read Before You Buy — No Video Output: These adapters support charging and USB 2.0 data transfer, but cannot transmit video signals. Except for standard USB webcams (which use USB data only), they are not compatible with HDMI/DisplayPort cables, video-capable USB-C hubs, or docking stations with video output.
- Convert USB-A Ports to USB-C: Designed to connect USB-C earphones, cables, flash drives, card readers, and other USB-C accessories to standard USB-A ports. Plug-and-play with no drivers or software required.
- Aluminum Alloy Housing: Built with a sturdy aluminum alloy shell that aids in heat dissipation and protects against daily wear and scratches. Designed to maintain a stable and secure connection.
- Compact & Travel-Friendly: The ultra-compact design allows the adapter to stay plugged into your device without blocking adjacent ports or adding bulk, reducing wear and tear on your original USB ports.
- 12-Month Warranty: Backed by a 12-month manufacturer warranty for peace of mind. Designed to meet strict quality control standards for reliable everyday performance.
| Situation | Correct starting point | Important limitation |
|---|---|---|
| U.S.-registered or documented recreational boat, domestic operation only, no legal FCC ship-station-license requirement | An authorized U.S. private agent, such as BoatUS | BoatUS limits its service to recreational boats under 65 feet that are not required by law to carry a radio or hold an FCC ship-station license and that do not visit or communicate with foreign ports. |
| U.S. boat that will visit or communicate with a foreign port | FCC ship-station licensing process | Do not obtain a domestic-only agent number expecting to convert it later. A different FCC-issued identity may be required, and radios may need reprogramming. |
| U.S. vessel or station otherwise subject to FCC licensing | FCC ship-station licensing process | Use the active FCC filing workflow for current requirements and fees. |
| Canadian-flagged vessel | ISED application, as directed by the Canadian Coast Guard | Canadian procedures are not the same as U.S. FCC or private-agent procedures. |
| Other foreign-flagged vessel | The authority designated by the vessel’s flag state | Do not assume a U.S. number is valid simply because the boat is visiting U.S. waters. |
When the U.S. FCC route is normally required
For a U.S. vessel, foreign-port travel or communication is the key practical dividing line. The FCC also controls cases in which the vessel or station must hold a ship-station license. If you operate commercially, carry a radio because a regulation requires it, use international maritime services, or are uncertain about your exemption, check the FCC requirements rather than selecting the domestic recreational route by assumption.
An FCC-issued MMSI is assigned through the ship-station licensing process. The application account and license records are maintained in the FCC systems, rather than in a private agent’s recreational database.
U.S. domestic recreational registration through an authorized agent
BoatUS describes one authorized private-agent option for qualifying U.S.-registered or documented recreational boats. Its published eligibility is limited to recreational boats under 65 feet that are not legally required to carry a radio or have an FCC ship-station license and that will not visit or communicate with foreign ports.
BoatUS currently lists a $25 fee for nonmembers and no fee for current members. That is a program price, not an FCC-wide fee; confirm the amount and eligibility terms on the live application before submitting.
Information to prepare
The application asks for vessel and owner information. Have the following available, while recognizing that fields can differ by authority and may change:
- U.S. registration or documentation details.
- Vessel name and identifying information.
- Owner’s mailing address, telephone number and email address.
- Emergency-contact information.
- Details about the DSC radio, AIS transponder or other equipment that will use the identity.
Application sequence
- Confirm that the boat is U.S.-registered or documented, recreational, under 65 feet, domestic-only and outside the FCC ship-station-license requirement.
- Open the agent’s current MMSI registration application and review the eligibility statement and fee shown there.
- Enter the vessel, owner, emergency-contact and equipment information exactly as requested.
- Submit the application and retain the confirmation and assigned nine-digit number.
- Program the number into each compatible fixed radio or AIS unit, following the equipment manufacturer’s instructions.
A number issued under this limited domestic route is not a temporary placeholder for international cruising. BoatUS states that its number cannot simply be reused when you later apply for an FCC number. If your operating plans change, contact the issuer and expect that one or more radios will have to be reprogrammed.
Rank #2
- 5-in-1 USB-C Hub: Experience comprehensive connectivity featuring a Power Delivery input, two USB-A 2.0 ports, a USB-A 3.0 port, and an HDMI port. (Note: The USB-C power delivery input port is only for connecting an external wall charger to power your laptop and cannot power peripheral devices.)
- 90W Pass-Through Charging: Achieve optimal charging with 90W pass-through power to your laptop, supported by a total input of 100W, with the hub reserving 10W for operational efficiency. (Note: Wall charger not included.)
- Quick Data Transfers: Accelerate your productivity with rapid data transfers using a high-speed 5Gbps USB 3.0 port and two 480Mbps USB 2.0 ports.
- 4K HDMI Display: Enhance your visual experience with a hub capable of delivering 4K resolution at 30Hz in both mirror and extend modes. Please note that this hub is compatible with MacBook (macOS 12 and newer), Windows 10 and 11, ChromeOS, and laptops equipped with DP Alt Mode and Power Delivery. Note: This device is not compatible with Linux.
- What You Get: Anker USB-C Hub (5-in-1, 4K HDMI), welcome guide, 18-month warranty, and our friendly customer service.
How to obtain an MMSI through the FCC
The FCC route applies when a U.S. vessel needs a ship-station license, including situations involving foreign ports or communications. The FCC’s systems use two linked services:
What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
- CORES: creates and manages your FCC Registration Number (FRN), the account identifier used for FCC transactions.
- ULS: the Universal Licensing System where ship-station licensing applications and related filings are submitted.
Standard ship-station filing
- Create or locate the responsible party’s FRN in CORES.
- Sign in to ULS and start the current ship-station application for the vessel or station.
- Enter the vessel’s documentation, name, technical and contact information requested by the form.
- Identify the operating circumstances, including international ports or communications, that make the license applicable.
- Review every digit and legal name, submit the filing and save the confirmation and license record.
- After the MMSI is issued, program it into the equipment and keep the FCC license information with the vessel’s records.
FCC fees and filing screens can change. Do not rely on an old fee schedule or an amount copied from an earlier application; use the amount displayed in the active ULS workflow.
Special case: handheld radios
The FCC has separate instructions for handheld-formatted MMSIs. In ULS, start an application, select the service “SA-Ship,” select the “Portable” station type and attach a request for a handheld-formatted MMSI. Follow the current FCC handheld notice rather than treating a portable unit as automatically equivalent to a permanently installed vessel radio.
Canadian and other flag-state applications
Canada
The Canadian Coast Guard directs Canadian applicants to ISED for the relevant VHF/DSC ship-station application. Use the current ISED form and instructions, provide the vessel and owner information requested, and retain the issued identity with the radio records. A Canadian boat should not use the U.S. domestic-agent route merely because the owner is temporarily in the United States.
Other countries
For a foreign-flagged boat, begin with the maritime radio or licensing authority designated by the flag state. Requirements, databases, fees and equipment rules vary. A U.S. visit does not transfer the boat into the U.S. MMSI system, and a number issued for one flag state should not be replaced or duplicated without instructions from the responsible authority.
Program the MMSI safely after approval
Registration and programming are separate actions. The number is not active in a radio until you enter it in the device’s DSC or AIS setup menu.
Rank #3
- Sleek 7-in-1 USB-C Hub: Features an HDMI port, two USB-A 3.0 ports, and a USB-C data port, each providing 5Gbps transfer speeds. It also includes a USB-C PD input port for charging up to 100W and dual SD and TF card slots, all in a compact design.
- Flawless 4K@60Hz Video with HDMI: Delivers exceptional clarity and smoothness with its 4K@60Hz HDMI port, making it ideal for high-definition presentations and entertainment. (Note: Only the HDMI port supports video projection; the USB-C port is for data transfer only.)
- Double Up on Efficiency: The two USB-A 3.0 ports and a USB-C port support a fast 5Gbps data rate, significantly boosting your transfer speeds and improving productivity.
- Fast and Reliable 85W Charging: Offers high-capacity, speedy charging for laptops up to 85W, so you spend less time tethered to an outlet and more time being productive.
- What You Get: Anker USB-C Hub (7-in-1), welcome guide, 18-month warranty, and our friendly customer service.
- Compare the issued record with the number displayed on the confirmation or license.
- Read the radio or AIS manual for the exact MMSI-entry path; menus differ by model.
- Enter the nine digits slowly and verify them against the record before saving.
- Enter the vessel name, call sign and other identity fields only where the device and license require them.
- Test ordinary DSC functions using the procedure allowed by your authority or local training guidance; do not trigger a false distress alert.
- Record which equipment contains the identity and store the documentation aboard the vessel.
Many fixed radios allow an MMSI to be entered only once, or permit changes only a limited number of times. If you discover an error, do not keep guessing at reset combinations: contact the manufacturer or the issuing authority. A factory reset can erase other configuration data without correcting the licensing record.
Can multiple radios use the same MMSI?
Generally, fixed radios installed on one vessel share that vessel’s MMSI. This allows a DSC call to identify the boat rather than an arbitrary individual radio. The U.S. Coast Guard notes exceptions for certain safety devices and handhelds that are not dedicated to one vessel.
Handheld decision points
- A handheld used only with one vessel may, in some circumstances, use that vessel’s MMSI.
- A handheld intended for use on multiple vessels or independently of a specific vessel may require an FCC license and an FCC-issued handheld MMSI.
- Follow the current Coast Guard and FCC handheld guidance for the exact use case; do not copy a fixed-radio identity into every portable device automatically.
When transferring a radio to another boat, erase or change the old identity only through the permitted equipment procedure, and obtain direction from the issuing authority if the number is tied to a license or vessel record.
Do these 3 things before closing this tab:
1Scan for outdated or missing drivers - takes under a minute2Repair Windows errors before they cause bigger problems3Fix the driver behind crashes, sound loss and screen glitchesKeep the registration accurate
An MMSI record is useful only when its associated vessel and contact details remain current. Use the original agent or licensing authority for changes rather than creating a second identity.
- Update owner address, telephone and email details when they change.
- Update emergency contacts and vessel-identification information.
- Report a sale, transfer, cancellation or permanent change of flag through the issuer’s process.
- Before a new owner operates the radio, confirm whether the existing MMSI can be transferred or must be cancelled and replaced.
- After any approved change, check every radio and AIS unit for the correct programmed digits.
BoatUS provides account actions for managing registrations and ownership transitions within its service. FCC licensees should use the applicable ULS filing or the FCC’s stated modification and cancellation procedure. The authority’s record and the equipment’s programmed value must agree.
MMSI registration is not EPIRB registration
An MMSI identifies maritime radio transmissions. NOAA’s separate beacon registry records emergency beacons such as EPIRBs and their contact information. An EPIRB record may include the vessel’s MMSI, but entering an MMSI in a radio application does not register the beacon.
Rank #4
- Dual Converters, Infinite Potential：Includes 2× USB C male to USB A female adapters and 2× USB A male to USB C female adapters. Perfect for a wide range of uses—tablets with Bluetooth keyboards, expand USB ports on macbook, and more. Two different converters for all your daily needs
- Next-Level 10Gbps & 3A Charging: No more slow 480Mbps, this usb to usb c adapter has a transfer speed of up to 10Gbps, allowing you to do more transferring in less time. This usb adapter fits both USB A and USB C charger, supporting up to 3A fast charging
- Upgraded Exquisite Craftsmanship: With an aluminum alloy housing and metal connector, the usbc to usb adapter is extremely durable and sturdy. Rigorously tested to withstand more than 10,000 times of plugging and unplugging, ensuring long-lasting performance
- Broad Compatible: The usb c to usb adapter widely supports all USB C/ USB A devices like laptops, tablets, cellphones, car chargers, and phone chargers. Such as compatible with MacBook Pro/Air 2023/2022, Thunderbolt 4/3 Devices,Apple MagSafe Watch 9/8/7/SE/Ultra, iPad Pro 2022/2021, Samsung Galaxy S23/S20/S10, and iPhone 17/16/15 Pro. Plug and play
- Please Note: To reach 10Gbps speed, keep the cable under 3.3 ft. For USB A Male to USB C adapters, try flipping the USB C connector. USB C Male to USB A adapters support bidirectional 10Gbps transfer within 3.3 ft
If the boat carries an EPIRB, register that beacon separately with NOAA, update the beacon record when the vessel or emergency contacts change, and verify that the hexadecimal beacon identification number is entered correctly. Treat the radio identity and the beacon registration as two linked but distinct records.
PC Slower Than It Used to Be?
A free scan shows the junk files, broken settings and background clutter dragging Windows down - then fixes them in one click.Free scan · Windows 10 & 11Outdated Drivers Are Slowing You Down
One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware matchCommon mistakes and how to recover
Self-assigning a number
Do not generate nine digits yourself, copy a number from another vessel or use a number found on a label. The FCC expressly prohibits self-assignment. Apply through the responsible authority or authorized agent.
Using a domestic number for an international voyage
A domestic recreational-agent number may be ineligible for a vessel that later visits or communicates with foreign ports. Stop before departure, ask the issuer and FCC which identity is required, and plan for radio reprogramming. BoatUS states that its number cannot simply be reused in a later FCC application.
Assuming every recreational boat needs an FCC license
FCC licensing is not automatically required for every U.S. recreational boat. The operating area, communications, equipment and legal requirements determine the route. Use the FCC’s eligibility guidance instead of applying a blanket rule.
Entering one wrong digit
A single transposed digit can identify another vessel or make DSC functions unreliable. Compare the confirmation, license and programmed display character by character. If the radio is locked after entry, contact the manufacturer and issuing authority.
Duplicating an identity across unrelated boats
Fixed radios on the same boat generally share one vessel identity; two unrelated boats should not. A sale, charter arrangement or equipment transfer requires an issuer-approved record change and, where applicable, a new number.
Best Value
- 5-in-1 Connectivity: Equipped with a 4K HDMI port, a 5 Gbps USB-C data port, two 5 Gbps USB-A ports, and a USB C 100W PD-IN port. Note: The USB C 100W PD-IN port supports only charging and does not support data transfer devices such as headphones or speakers.
- Powerful Pass-Through Charging: Supports up to 85W pass-through charging so you can power up your laptop while you use the hub. Note: Pass-through charging requires a charger (not included). Note: To achieve full power for iPad, we recommend using a 45W wall charger.
- Transfer Files in Seconds: Move files to and from your laptop at speeds of up to 5 Gbps via the USB-C and USB-A data ports. Note: The USB C 5Gbps Data port does not support video output.
- HD Display: Connect to the HDMI port to stream or mirror content to an external monitor in resolutions of up to 4K@30Hz. Note: The USB-C ports do not support video output.
- What You Get: Anker 332 USB-C Hub (5-in-1), welcome guide, our worry-free 18-month warranty, and friendly customer service.
Ignoring changed contact information
Outdated owner or emergency-contact details reduce the value of a distress alert. Update the account or license promptly and verify the new information in the authority’s record.
Decision checklist before submitting
- What country issued the vessel’s registration or documentation?
- Will the boat visit or communicate with a foreign port?
- Is the vessel recreational, commercial, governmental or otherwise regulated?
- Is a ship-station license legally required?
- Which equipment will transmit the MMSI: fixed DSC radio, AIS, handheld or another maritime station?
- Are vessel, owner, emergency-contact and equipment details ready?
- Have you checked the current fee and eligibility on the live filing page?
- Do you have a plan for updating the record after sale, transfer, address change or a new flag state?
Quick comparison of the main paths
| Criterion | U.S. authorized recreational agent | FCC ship-station license | Canada / other flag state |
|---|---|---|---|
| Primary users | Qualifying U.S. recreational boats | U.S. vessels requiring licensing, including relevant international operations | Vessels registered under that jurisdiction |
| International ports or communications | Not eligible under BoatUS’s stated domestic-only terms | Designed for cases requiring FCC licensing | Follow the flag-state authority’s rules |
| Account or filing system | Agent account and registration record | FCC CORES FRN and ULS filing | ISED or the designated national system |
| Published cost | BoatUS lists $25 for nonmembers and waives it for current members; confirm current terms | Use the fee shown in the active ULS workflow | Not stated here; check the current national application |
| BoatUS size condition | Under 65 feet | Not applicable as a general FCC limit | Not stated; follow the national authority |
| Changes and ownership | Manage through the agent’s account and transfer process | Modify, cancel or transfer through FCC procedures | Use the issuing authority’s process |
What to keep aboard after registration
- The MMSI confirmation, FCC license or national authorization.
- The vessel’s registration or documentation.
- A list of equipment programmed with the number.
- Current owner and emergency-contact details.
- Manufacturer instructions for changing or verifying the radio and AIS identity.
- A separate NOAA EPIRB registration record if an EPIRB is carried.
Recheck the record whenever the boat changes ownership, flag, operating area or communications equipment. The most important rule remains simple: obtain the identity from the correct authority, enter it accurately, and never self-assign one.
Frequently Asked Questions
Can I use a U.S. private-agent MMSI when sailing to Canada?
Not automatically. A U.S. domestic recreational-agent number is limited by the agent’s eligibility terms and is not a substitute for the FCC route when the vessel visits or communicates with foreign ports. Check the FCC requirement before the trip; Canadian-flagged vessels use ISED.
Quick wins for a faster PC:
Clear out junk files and repair common Windows errorsFree Scan →Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →Repair Windows errors before they cause bigger problemsFix Now →Does every radio on my boat need a different MMSI?
No. Fixed radios on one vessel generally use the vessel’s MMSI. Handhelds and safety devices can have exceptions, so follow current Coast Guard and FCC guidance for the particular portable equipment.
Is an MMSI the same as registering an EPIRB?
No. MMSI registration identifies maritime radio transmissions. EPIRB registration is a separate NOAA beacon record, although that record may include the vessel’s MMSI.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
