India's prime minister- elect Narendra Modi has taken to Twitter to thank fellow leaders in Japan, Russia, Sri Lanka, Nepal and Australia for their good wishes.
But one man still waiting for a reply is US Secretary of State John Kerry.
While Canadian Prime Minister Stephen Harper has had two mentions and Russian President Vladimir Putin received warm words on Monday, Modi has conspicuously made no reference at all to the leaders of the world's superpower.
Washington, along with European powers, boycotted the 63- year-old for a decade and denied him a visa over religious violence in Gujarat in 2002 while he was the state's chief minister.
Kerry tweeted congratulations to Modi on Friday after a landslide win for his Hindu nationalist Bharatiya Janata Party, saying he looked forward to working with him and "growing shared prosperity/security".
President Barack Obama telephoned Modi but has yet to comment in person. He had warm words for his predecessor on Saturday, however.
As Manmohan Singh left office after 10 years in power, Obama called to tell him that there were "very few people in public life that I have admired or appreciated more".
Modi has displayed no rancour publicly about his treatment by Washington, telling an interviewer earlier this month that foreign relations "should not and cannot be influenced by incidents related to individuals".
But analysts are looking closely at how the world's biggest democracies embrace each other with Modi at the helm and following a highly damaging row over the arrest of an Indian diplomat in New York in December.
Modi, writing on Twitter to his 4.19 million followers, addressed a message to Putin on Monday saying that he looked forward "to making our relations with Russia even stronger in the years to come".
Japanese Prime Minister Shinzo Abe meanwhile was thanked for his good wishes.
"Personally, I have a wonderful experience of working with Japan as CM (chief minister). I am sure we will take India-Japan ties to newer heights," he wrote.
Modi has never been found guilty of wrongdoing over the 2002 riots, but his administration's failure to curb them left a legacy of suspicion.
He was refused a visa to the United States in 2005.
Britain also boycotted Modi, but British Prime Minister David Cameron sent a message of congratulations on Friday which was acknowledged by Modi the day afterwards.
"Hoping to further strengthen India-UK relations," he wrote.
