Eight out of the nine runners up in the group stages for the UEFA qualification to the tournament in Russia next summer qualified for the play-off stages.
The teams will play a two-legged play-off to determine who will fill the final four places for European teams at the 2018 World Cup.
The ties will take place on November 9-11 and 12-14.
Here are the ties:
Northern Ireland v Switzerland
Croatia v Greece
Denmark v Republic of Ireland
Sweden v Italy
