What is an ARN Value?

ARN stands for Amazon Resource Name. It is a unique identifier used to specify a resource within Amazon Web Services (AWS). Each resource in AWS—such as an S3 bucket, Lambda function, or IAM role—has its own ARN.

Every website or domain built by ASP will have a unique ARN value applied. However, your project manager will handle all ARN-related setup during the launch phase, so you don’t need to configure this yourself.

ARNs are mainly used when you need to grant permissions, reference resources in scripts, or configure integrations between AWS services.

📌 Structure of an ARN

An ARN has a standard format:

arn:partition:service:region:account-id:resource

• arn – The literal string “arn” that indicates this is an ARN.

• partition – The AWS partition (usually aws for standard regions).

• service – The AWS service (e.g., s3, lambda, iam).

• region – The region the resource resides in (e.g., us-east-1).

• account-id – The AWS account ID that owns the resource.

• resource – The resource identifier (can include type and name, e.g., bucket_name/object_name).

Example:

arn:aws:s3:::my-bucket-name

This refers to an S3 bucket named my-bucket-name in the AWS standard partition.

🌐 Key Uses of ARN Values

• Permissions & Policies – Specify which resources a user or role can access.

• Service Integration – Connect AWS services to each other (e.g., Lambda triggering from S3).

• APIs and Automation – Reference resources in scripts, CloudFormation templates, or SDKs.