Ireland have fallen one place to 30th in the FIFA World rankings following their 4-1 Nations League defeat to Wales and their 1-1 international friendly draw with Poland last week.
O’Neill’s men had been sitting in 29th but after a difficult international break, they fall one place down to 30th, two places below Northern Ireland who also dropped a place to 28th.
For the first time ever the top spot will be shared between two teams, with World Champions France and beaten semi-finalists Belgium both at number 1.
Roberto Martinez’s side, who finished third in Russia, have moved up one place to top the ranking for the first time since 2015.
England, who reached the World Cup semi-finals in Russia stay in sixth spot, while Ireland’s UEFA Nations League conquers Wales are in 19th.
2014 World Champions Germany who sensationally dropped to 15th place in August, move up three to 12th having previously held the number one spot.
Table toppers Belgium beat Iceland in the Nations League and Scotland in a friendly earlier this month, while France beat the Netherlands, but drew 0-0 with Germany in the Nations League.