A new, more expansive version of the nuclear deal, signed last week between Iran and world powers, has led to a flurry of trade and travel between the two countries.
The Iran-US deal includes sanctions relief for Tehran and sanctions relief against the US.
The agreement allows Iran to access US financial services, which have been restricted by US sanctions.
Iran has already opened more than 30 new trade and investment deals with the US in the past year.
Here are some of the most popular deals Iran has made with the world: US-Iran bilateral trade in goods reached $1.3 trillion in 2015, with US trade with Iran now accounting for more than half of all US trade.
US- Iran bilateral trade reached $9.8 billion in 2015.
US trade reached more than $4 billion with Iran in 2015 and US trade to Iran was $1 billion in 2016.
Iran also opened a new trade deal with the European Union in October.
Iran’s state-owned oil company Aramco has been granted the right to export oil through a pipeline from the western city of Qom to a port in Tehran.
US oil company Chevron and its European partner Shell are also exploring the possibility of building a gas pipeline from a Qom port to the US, which would be the first US gas export to Iran since the 1979 revolution.
Iran signed a memorandum of understanding to buy Iranian oil and gas through a joint venture between a joint company called Iran Oil and Gas and the US-based private equity firm Blackstone Group.
US firms Chevron and Shell have been working with the Iranian state-run oil company, the National Iranian Oil Company, to explore the possibility that it could develop an oil field off the coast of western Iran, which could supply energy to Europe and the Middle East.
Iran Oil also signed a Memorandum of Understanding with Chinese energy firm China National Petroleum Corporation to build a gas field on the western coast of Iran.
US companies Chevron and Saudi Aramco are working to develop oil and natural gas from Iran’s Shatt al-Arab, a huge reservoir of natural gas.
Iran is also working to export natural gas to Europe via the European Gas Pipeline project, which will link France and Germany, with an option to expand to Spain.
Iran Energy Minister Abbas Akhoundi said the country has received a lot of investment in the gas field, but the project has yet to be approved by the International Atomic Energy Agency.
The deal also provides for the lifting of sanctions against Iran in exchange for Tehran accepting international safeguards against the spread of nuclear weapons.
A US congressional panel is now considering lifting the sanctions on Iran, but this process could take several months.
The International Atomic Trade Association, a non-governmental organisation that monitors and promotes international trade in nuclear energy, said Iran signed an agreement with the Organisation for Economic Co-operation and Development (OECD) last year.
Iran agreed to accept some safeguards measures, including the removal of sanctions on Iranian companies.
The OECD’s secretary general said that the pact was a significant achievement and highlighted the “significant progress made in the fight against terrorism and extremism in the Middle Eastern region.”
US- and international-level sanctions have been lifted on Iran since December of last year, but they remain in place for some sectors.
Iran began to import oil in January, but it will be several months before Iranian oil is fully exported to the world.
Iranian oil exports have been declining since they began increasing in 2013.
The international community has warned Iran to not import more oil from the United States, the European countries, Russia and China, as they have threatened sanctions.
However, US officials have said they do not plan to lift the sanctions until Iran fully complies with the deal.