Conflict / Iran and Gulf shipping
US announces a blockade of traffic to and from Iranian ports
CENTCOM announced that a blockade of maritime traffic entering and exiting Iranian ports would begin on 13 April.
- Review cut-off
- Review window
- 2026-04-09 to 2026-04-13
- Published by Caracal Intelligence
Historical review. Published after the period covered. The cut-off is the end of the review date in UTC. We compare source dates and known updates with this cut-off. Some sources lack exact times or earlier versions. Business effects below are possible outcomes, not confirmed losses.
Audit change. 23 October 2026: The event date changed from 13 April to 12 April. The announcement came on 12 April. The planned start date was 13 April.
Announcement date · 2026-04-12
What happened
CENTCOM announced the blockade on 12 April. It said enforcement for traffic entering or leaving Iranian ports would start on 13 April. It said this measure would not impede Hormuz traffic to or from non-Iranian ports.
Evidence: [1]
Caracal analysis / Possible effects
Global logistics
Ships with Iranian port calls could face interception or diversion. Other Gulf traffic would still need to assess separate Iranian threats and the wider security conditions.
Trade and supply chains
Physical enforcement could interrupt a transaction even where paperwork and sanctions permissions had been reviewed. Voyage history and destination would become important operating information.
Industries to watch
Oil, bulk cargo, port services, chartering, and trade finance firms should check exposure to Iranian ports and coastal areas.
- Shipping
- Oil
- Trade finance
What to check next
- Review the full voyage and intended port calls.
- Obtain current official instructions before any affected movement.
Sources and evidence limits
[1] US Central Command · Official military notice · Published 2026-04-12
US announces a blockade of traffic to and from Iranian ports — source report
The source describes the announced US scope. It does not guarantee passage or describe all restrictions imposed by other actors.
Sources and claims checked on . This check compares the brief with dated source reports. It does not independently confirm every reported incident. Check current conditions before you change an operating plan.