How to Check for NSGs & Route Tables on a Subnet level
1) Navigate to the Azure Portal
2) Click on Virtual Networks
3) Select the Vnet you want to check
4) Click on Subnets
5) Select the Subnet you want to check
6) Click Network Security Group
7) If a network security group is selected, change it to none
8) If a route table is select, change it to none
8) If there is a NSG or Route Table on the subnet, select it to review the rules associated ensuring traffic is being routed as desired.