The letters ICE most often stand for U.S. Immigration and Customs Enforcement, the federal law enforcement agency responsible for immigration and customs laws. The same three letters also mean “In Case of Emergency” in a medical context, “internal combustion engine” when people are talking about cars, and Intercontinental Exchange in finance. Which meaning applies depends entirely on the conversation.
U.S. Immigration and Customs Enforcement
This is the meaning most people are looking for. U.S. Immigration and Customs Enforcement is a federal agency inside the Department of Homeland Security.1Homeland Security. Immigration and Customs Enforcement Congress created it through the Homeland Security Act of 2002, and it became operational in March 2003 as part of the largest federal reorganization since the creation of the Department of Defense.2U.S. Immigration and Customs Enforcement. History of ICE That reorganization dissolved the old Immigration and Naturalization Service and divided its work among three new agencies: ICE, U.S. Customs and Border Protection, and U.S. Citizenship and Immigration Services.3U.S. Citizenship and Immigration Services. Handbook for Employers M-274 – 1.1 The Homeland Security Act
ICE does its work through two main branches. Enforcement and Removal Operations identifies, arrests, detains, and deports people who are in the country without authorization.4U.S. Immigration and Customs Enforcement. Enforcement and Removal Operations Homeland Security Investigations is the agency’s criminal investigative arm, handling transnational crimes like human trafficking, drug smuggling, and intellectual property theft.5Immigration and Customs Enforcement. What We Investigate
Finding Someone in ICE Custody
If someone you know has been detained, ICE runs an Online Detainee Locator System at locator.ice.gov.6U.S. Immigration and Customs Enforcement. Online Detainee Locator System You can search by the nine-digit alien registration number (A-Number), or by name, country of birth, and date of birth. Every field has to match exactly, punctuation included, so try alternate spellings if nothing comes up. The system only shows people currently in ICE or Customs and Border Protection custody, and it cannot search for anyone under 18.
For questions the locator can’t answer, ICE’s Detention, Removals, and Information Line is at 1-888-351-4024, with live operators Monday through Friday, 8 a.m. to 8 p.m. Eastern, and Spanish-language help available.7U.S. Immigration and Customs Enforcement. Contact ICE About Immigration Enforcement Concerns The separate tip line for reporting suspected criminal activity is 1-866-DHS-2-ICE.
In Case of Emergency
In medical and personal safety contexts, ICE stands for “In Case of Emergency.” The original idea was straightforward: save an emergency contact in your phone under the name “ICE” so first responders can reach your family if you are unconscious or unable to speak. A British paramedic named Bob Brotchie of the East Anglian Ambulance Service started the campaign in 2005, and it spread internationally within months.
Smartphones have mostly replaced the address-book trick with something better. Apple’s Health app lets you build a Medical ID that shows emergency contacts, blood type, allergies, medications, and medical conditions on the lock screen without a passcode.8Apple. Set Up Your Medical ID in the Health App on Your iPhone Android has a similar feature under its Safety settings. The value isn’t only faster notification. Paramedics who can see that you take blood thinners or react to a common medication can avoid treatment choices that would make things worse. Setup takes about two minutes.
Internal Combustion Engine
In the automotive world, ICE means the internal combustion engine, the technology that has powered most cars and trucks for over a century. These engines burn fuel mixed with air inside cylinders, and small controlled explosions push the pistons that eventually turn the wheels. The acronym has become common shorthand for distinguishing gasoline and diesel vehicles from battery electric vehicles.
That distinction matters more now because regulation is actively shaping the new-vehicle market. The EPA finalized emission standards in 2024 covering model years 2027 through 2032 that require progressively cleaner tailpipe output from new light-duty and medium-duty vehicles.9U.S. Environmental Protection Agency. Final Rule – Multi-Pollutant Emissions Standards for Model Years 2027 and Later Light-Duty and Medium-Duty Vehicles The rules don’t ban ICE vehicles, but they push automakers toward selling more electric and plug-in hybrid models to meet fleet-wide averages. More than a dozen states have separately adopted rules requiring 100 percent of new passenger vehicles sold to meet zero-emission standards by model year 2035. Nothing here affects vehicles already on the road, but anyone car shopping over the next decade will see the acronym ICE used constantly for the traditional option.
Intercontinental Exchange
In finance, ICE stands for Intercontinental Exchange, a publicly traded company that operates a network of global exchanges and clearinghouses. It completed its acquisition of NYSE Euronext in 2013, which made it the parent company of the New York Stock Exchange.10Intercontinental Exchange. IntercontinentalExchange Completes Acquisition of NYSE Euronext It trades on the NYSE under its own ticker symbol: ICE.
The company’s influence is largest in commodity pricing. Its platform hosts the Brent crude oil futures contract, one of the most important benchmarks for global oil prices. It also facilitates trading in agricultural products, credit derivatives, and other asset classes, and its clearinghouses sit between buyers and sellers to guarantee that both sides meet their financial obligations. The Commodity Futures Trading Commission oversees the company’s U.S. commodity operations.11Commodity Futures Trading Commission. CFTC Letter 03-17 Revenue comes mostly from transaction fees and market data services sold to institutional investors and trading firms.