IranAir (IR, Tehran Mehrabad) has suspended its 2x weekly Tehran Imam Khomeini-Kuala Lumpur International, Malaysia service on account of its sole B747SP - EP-IAC (msn 21093) - undergoing mandatory maintenance checks. Local newspapers report the route may resume with effect from August 1 but this is dependent on the completion of all necessary checks.
Mahan Air (W5, Tehran Mehrabad) also operates flights to the Malaysian capital albeit on a 3x weekly basis using A300-600 equipment.