Portugal
http://www.ana-aeroportos.pt

United Kingdom
http://www.analysysmason.com/

United Kingdom
http://www.andrew.com

Italy
http://www.ansaldo-sts.com/en

Belgium
http://www.ansem.com

Norway
http://www.ansur.no/

Italy
http://www.antech.it

http://www.antrak.org.tr

Belgium
http://www.antwerpspace.be/

Germany
http://www.apcon.aero/

United Kingdom
http://aramiska.com/

Greece
http://www.aratos.gr/

France
https://www.ariane.group/en/

Germany
https://www.ariane.group/en/

France
http://www.arianespace.com/index/index.asp

Spain
http://www.arinc.com/

United Kingdom
http://arqiva.me/

United Kingdom
http://www.arqiva.com

Ireland
http://arralis.com/

Canada
http://www.array.ca

The Netherlands
http://www.ars.nl/

http://www.aotag.ch

The Netherlands
https://artes.esa.int

Switzerland
http://www.ascom.ch/ch-de/index-ch/

Italy
http://www.ashmm.com