The Prime Minister-elect tweeted his gratitude to the Heads of State and Government, and other dignitaries since yesterday but has so far made no mention of either US President Barack Obama or Secretary of State John Kerry.
While Obama called up Modi, Kerry had congratulated him on Twitter.
Modi thanked leaders of Japan, Russia, Spain, Nepal, Canada, Germany and South Africa besides the UN Secretary General and the Dalai Lama.
"India-Russia friendship has stood the test of time. We will further strengthen our relations in a wide range of fields," he wrote in two tweets.
More From This Section
The Gujarat chief minister also mentioned Japan in his tweets speaking of his experience of working with the east Asian economic powerhouse.
"Personally, I have a wonderful experience of working with Japan as CM. I am sure we will take India-Japan ties to newer heights."
After thanking Nepal President Ram Baran Yadav and Prime Minister Sushil Koirala for their wishes, he referred to the neighbouring country as an "old & deeply valued friend".
He has, however, in his public utterances stressed that foreign relations cannot be "influenced" by incidents related to individuals.