Nigeria and South Africa have remained unmoved in the May edition of the FIFA World Rankings, although Ghana are one of several nations to have climbed after a relatively quiet month of global football.
FIFA's latest ranking released on Thursday showed that Nigeria still has 635 points, exactly the same points it had last month.
DR Congo, ranked third in Africa and 38th in the world, will not be in Russian Federation.
The Eagles' 2018 World Cup Group D opponents all maintain their previous spots.
The first 47 positions remain unchanged from April's ranking, but outside the top 50, a couple of nations have made notable advances.More news: Uber changes USA sexual assault policies
More news: The Crew 2 beta features the entire open world, sign-ups now live
More news: Sherpa From West Hartford Scales Mount Everest For Record Ninth Time
Tunisia is 14th on the table, followed by Senegal on 28th and Congo DR the 38th.
Argentina remains number five in the world, Croatia in number 18 and World Cup debutants Iceland on number 22.
Barrister Dalung expressed delight in the team's show of commitment, patriotism and unity of objective as the World Cup in Russian Federation gradually gets closer.
Head coach Gernot Rohr also named the local league top scorers Junior Lokosa and Simeon Nwankwo as the new faces in the list. Democratic Republic of Congo are third followed by Morocco and Egypt in the fourth and fifth places respectively.
The next ranking will be published on June 7, just seven days before the opening match in Russian Federation.