We just signed our first client in Spain, which will be the 24th country in which The OpenNMS Group has commercial customers. Just 170 or more to go!
The other countries are, in no particular order:
Canada, Mexico, Singapore, Japan, Australia, Israel, Denmark, France, Germany, Switzerland, The Netherlands, the UK, Italy, Trinidad, Malta, India, Honduras, Chile, Sweden, the UAE, Portugal, Egypt and the US.