The Republic of Ireland have slipped six places in the new FIFA world rankings to 38th after the recent friendly draws against Bolivia and Ecuador.
Scotland are down nine to 23rd while England remain eighth following recent results.
After making a strong start to their Euro 2008 qualifying Group B campaign the Scots rose as high as 14th in the governing body's ratings.
But despite a 2-0 away win against the Faroe Islands last week, Alex McLeish's side have been overtaken by the likes of Serbia, Ghana, Ivory Coast and the USA.
England held their position after drawing at home to Brazil in a friendly and winning their latest qualifier in Estonia last week.
Northern Ireland, who recently appointed Nigel Worthington as Lawrie Sanchez's successor, moved up four to 29th despite not having played since March.
Wales remain 75th after a friendly draw with New Zealand and the Euro 2008 stalemate against Czech Republic in Cardiff.
World champions Italy remain top while France have overtaken Brazil to go second. Argentina are down to fifth, now behind Germany who now occupy their highest position in four years
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