Question

What are the limits of Route 53 in terms of rule, ip attached, association etc?

Answer 1

Here in this amazon documentation you can find all the different limits related to Route 53 like

IP address per rule can only limit to 5

Rules per Region can limit to 1000

Rules association with VPC can limit to 2000

Query per IP can limit to 10000

https://docs.aws.amazon.com/Route53/latest/DeveloperGuide/DNSLimitations.html