'Ru' used in million biggest domains list by Alexa.com:
warriorforum.comrutracker.org
techcrunch.com
drudgereport.com
drupal.org
trulia.com
'Ru' used in other domains:
bardscrubs.comcleverpcforums.com
newyorkmortgagetrust.com
relumahgfserum.com
grupodavila.com
runnier.com
Statistical data
"ru" has the frequency of use of 0.0004% on city-data.com forum
"Ru" has the frequency of use of 0.0059% on en.wikipedia.org.
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