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ECCN reference · Category 4: Computers

ECCN 4A906

Quantum computers and related "electronic assemblies," and "components" therefor, as follows

Systems, equipment and components. Reasons for control: NS (National security), RS (Regional stability), AT (Anti-terrorism).

Does 4A906 need a license to your country?

Enter the full classification (for example 4A906.a.1) and a destination. The check reads the Country Chart, the end-use and embargo rules, and shows the rule and source behind the answer.

License requirement check

Item classification and destination. No account needed.

An ECCN (such as 5A992.c) is an exact match and works best. Word search matches the official CCL wording and a reviewed list of everyday names as you write them; it does not guess what you mean or fix spelling. Don’t know the ECCN? Use Find the ECCN.

License requirements

Each control below comes from the entry’s License Requirements table. Where it names a Country Chart column, the countries with an X in that column need a license for the items the control covers, unless a License Exception applies.

  • NS (National security): NS applies to entire entry. Worldwide control. See § 742.4(a)(5) and (b)(10) of the EAR.
  • RS (Regional stability): RS applies to the entire entry. Worldwide control. See § 742.6(a)(10) and (b)(11) of the EAR.
  • AT (Anti-terrorism): AT applies to entire entry. No Country Chart country has an X in column AT1; the destinations this control targets are under “Not decided by the Country Chart” below.

Not decided by the Country Chart: Covered Donetsk region of Ukraine (DNR), Covered Luhansk region of Ukraine (LNR), Crimea region of Ukraine, Cuba, Iran, Korea, North, Syria. These destinations are under embargoes or other special controls in 15 CFR Part 746, which require a license for most items whatever the chart shows. Russia and Belarus also have broad Part 746 controls in addition to the chart.

A blank on the Country Chart is not permission to ship. End-use and end-user rules (15 CFR Part 744), embargoes and sanctions (Part 746), and the parties to the transaction still apply. Use the check above for your item and country.

List-based License Exceptions

As the entry lists them. Each exception has its own conditions in 15 CFR Part 740, and § 740.2 bars or limits most of them for Russia, Belarus, Country Group D:5 and embargoed destinations, so an entry’s “Yes” does not mean it is available everywhere.

  • LVS: N/A
  • GBS: N/A
  • IEC: Yes, see § 740.2(a)(22) and § 740.24 of the EAR.
  • Special Conditions for STA
  • STA: License Exception STA may not be used to ship any item in this ECCN to any of the destinations listed in Country Group A:5 or A:6 (See Supplement No.1 to part 740 of the EAR).

Items in 4A906

The controls often apply to some paragraphs only, so check the full paragraph, for example 4A906.a.

Show all 11 paragraphs
  • 4A906.a Quantum computers, as follows:
  • 4A906.a.1 Quantum computers supporting 34 or more, but fewer than 100, 'fully controlled', 'connected' and 'working' 'physical qubits', and having a 'C-NOT error' of less than or equal to 10^−4;
  • 4A906.a.2 Quantum computers supporting 100 or more, but fewer than 200, 'fully controlled', 'connected' and 'working' 'physical qubits', and having a 'C-NOT error' of less than or equal to 10^−3;
  • 4A906.a.3 Quantum computers supporting 200 or more, but fewer than 350, 'fully controlled', 'connected' and 'working' 'physical qubits', and having a 'C-NOT error' of less than or equal to 2 × 10^−3;
  • 4A906.a.4 Quantum computers supporting 350 or more, but fewer than 500, 'fully controlled', 'connected' and 'working' 'physical qubits', and having a 'C-NOT error' of less than or equal to 3 × 10^−3;
  • 4A906.a.5 Quantum computers supporting 500 or more, but fewer than 700, 'fully controlled', 'connected' and 'working' 'physical qubits', and having a 'C-NOT error' of less than or equal to 4 × 10^−3;
  • 4A906.a.6 Quantum computers supporting 700 or more, but fewer than 1,100, 'fully controlled', 'connected' and 'working' 'physical qubits', and having a 'C-NOT error' of less than or equal to 5 × 10^−3;
  • 4A906.a.7 Quantum computers supporting 1,100 or more, but fewer than 2,000, 'fully controlled', 'connected' and 'working' 'physical qubits', and having a 'C-NOT error' of less than or equal to 6 × 10^−3;
  • 4A906.a.8 Quantum computers supporting 2,000 or more 'fully controlled', 'connected' and 'working' 'physical qubits';
  • 4A906.b Qubit devices and qubit circuits, containing or supporting arrays of 'physical qubits', and "specially designed" for items specified by 4A906.a;
  • 4A906.c Quantum control components and quantum measurement devices, "specially designed" for items specified by 4A906.a;

Source

Commerce Control List, 15 CFR Part 774, Supplement No. 1 (official text on eCFR), as of August 21, 2026, 1:45AM EDT. Commerce Country Chart, Supplement No. 1 to Part 738, as of August 21, 2026, 1:45AM EDT.

This page is a preliminary reference, not legal advice, a classification ruling or permission to ship. Confirm the classification against the full official text.