# Flight Numbers not found

**URL:** <https://discussions.flightaware.com/t/flight-numbers-not-found/18097>\
**Category:** AeroAPI\
**Created:** [February 29, 2016, 11:35am UTC](https://discussions.flightaware.com/t/flight-numbers-not-found/18097 "2016-02-29T11:35:35Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![rafaelrazim](https://avatars.discourse-cdn.com/v4/letter/r/d78d45/32.png) [@rafaelrazim](https://discussions.flightaware.com/u/rafaelrazim)\
**Post date:** [February 29, 2016, 11:35am UTC](https://discussions.flightaware.com/t/flight-numbers-not-found/18097/1 "2016-02-29T11:35:35Z")

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Hi!

I am trying to get information about a Flight for a Air Berlin Flight with the Flight No AB8042.

When I do a FlightInfoEx call no information is returned.

However If i search for BER8042 the Flight is found.

How can I find out that instead of AB8042 I have to the use BER8042

Any help welcomed!

cu Rafael

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**Author:** ![adimic](https://avatars.discourse-cdn.com/v4/letter/a/ed655f/32.png) [@adimic](https://discussions.flightaware.com/u/adimic)\
**Post date:** [February 29, 2016, 7:32pm UTC](https://discussions.flightaware.com/t/flight-numbers-not-found/18097/2 "2016-02-29T19:32:09Z")

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Hi Raphael,

**AB** is the IATA code for Air Berlin.  
**BER** is the ICAO identifier.

The FlightXML API calls that require identifiers for airlines or airports generally expect ICAO codes as IATA is sometimes shared and thus ambiguous.

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**Author:** ![rafaelrazim](https://avatars.discourse-cdn.com/v4/letter/r/d78d45/32.png) [@rafaelrazim](https://discussions.flightaware.com/u/rafaelrazim)\
**Post date:** [March 1, 2016, 3:51pm UTC](https://discussions.flightaware.com/t/flight-numbers-not-found/18097/3 "2016-03-01T15:51:21Z")

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Hi!

Thx a lot, I got a list of IATA codes and just replace them with the ICAO codes if I don’t get reply in the first time!

cU Rafael

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**Author:** ![adimic](https://avatars.discourse-cdn.com/v4/letter/a/ed655f/32.png) [@adimic](https://discussions.flightaware.com/u/adimic)\
**Post date:** [March 1, 2016, 4:06pm UTC](https://discussions.flightaware.com/t/flight-numbers-not-found/18097/4 "2016-03-01T16:06:59Z")

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Rafael,  
You should not make any calls with IATA codes. I really suggest you use ICAO the first time and all the times.