While, in terms of UK and Republic of Ireland national sides, the winger would be the first since Liam Lawrence in May 2011.
CurtisÂ has been calledÂ into Martin O'Neill's side for tomorrow night'sÂ friendly againstÂ PolandÂ in Wroclaw.
The former Derry City player had netted for the Republic of IrelandÂ under-21s in their European Championships qualifier draw with Kosovo on Friday.
He is now suspended forÂ Tuesday's under-21 encounter with Germany '“Â however, remainsÂ available for the senior squad, prompting a maiden call-up.
Since the Premier League years, Pompey representatives in national sides have become rare feats.
The last time it happened was October 2012, during Dumbuya's brief Fratton Park presence.
The right-backÂ spent four-and-a-half months on the south coast, amassing 26 appearances, before released in January 2013.
Signed by Michael Appleton as a free agent for the 2012-13 League One campaign, it was a short stay which alsoÂ heralded his Sierra Leone debut.
Dumbuya appeared in an Africa Cup of Nations qualifier taking onÂ Tunisia in October 2012, missing Pompey fixtures against Wycombe (Johnstone's Paint Trophy) and Crewe.
His Sierra Leone bow finished goalless '“Â and represented a sole outing for them during his Blues career.
Meanwhile, it has been more than seven years since Pompey had a representative in a senior team from either England, Wales, Scotland, Northern Ireland or the Republic of Ireland.
Lawrence earned five Republic of Ireland caps while on the Blues' books, the last of which arrivingÂ on May 29, 2011, against Scotland.
The right-sided midfielder featured for 62 minutes before replaced by Seamus Coleman in the 1-0 victory, Robbie Keane the match-winner.
He subsequently served as an unused substitute in another four international matches, the final squad involvement coming in October 2011 when Eire defeated Andorra 2-0.
He never played for his country again, reaching 15 caps and two goals.
Lawrence totalled eight goals in 58 appearances for Pompey, before departing in August 2012, having agreed to terminate his contract.
As for Curtis, he has enjoyed an impressive start to life at Pompey, with five goals andÂ three assists in six League One outings.
Have you read?