AWS Availability Zones

• Each region has many availability zones (usually 3, min is 3, max is 6). Example:

• ap-southeast-2a

• ap-southeast-2b

• ap-southeast-2c

• Each availability zone (AZ) is one or more discrete data centers with redundant power, networking, and connectivity.

• They’re separate from each other, so that they’re isolated from disasters.

• They’re connected with high bandwidth, ultra-low latency networking.

List of AWS regions and their availability zones

S.No	AWS region code	AWS region name	Number Of Availability Zones	Availability Zone Names
1	us-east-1	Virginia	4	us-east-1a us-east-1b us-east-1c us-east-1e
2	us-west-2	Oregon	3	us-west-2a us-west-2b us-west-2c
3	us-west-1	N. California	3	us-west-1a us-west-1b
4	eu-west-1	Ireland	3	eu-west-1a eu-west-1b eu-west-1c
5	eu-central-1	Frankfurt	2	eu-central-1a eu-central-1b
6	ap-southeast-1	Singapore	2	ap-southeast-1a ap-southeast-1b
7	ap-southeast-2	Sydney	3	ap-southeast-2a ap-southeast-2b ap-southeast-2c
8	ap-northeast-1	Tokyo	2	ap-northeast-1a ap-northeast-1c
9	ap-northeast-2	Seoul	N/A	N/A
10	sa-east-1	Sao Paulo	3	sa-east-1a sa-east-1b sa-east-1c
11	cn-north-1	China (Beijing)	N/A	N/A
12	ap-south-1	India (Mumbai)	2	ap-south-1a ap-south-1b