While setting up your Apple - iOS developer account, we highly recommend businesses set up this up "As an organization"
In order to set up your Apple Developer Account as an organization, you will require a D-U-N-S Number
You can view all details related to a D-U-N-S number here or read below: What is a D-U-N-S Number?
D-U-N-S Number is a unique nine-digit number (standard business identifier) that identifies business entities on - a location-specific basis. This number is authorized, assigned, and maintained by Dun & Bradstreet (D&B)
As part of the enrollment and verification process for your Apple Developer account as an organization, your unique D-U-N-S Number will be used to ascertain and check the identity and legal entity status of your organization.
D-U-N-S Number is required if you're enrolling as a company, organization, etc. If you're registering as an individual on the Apple Developer Account, you may not require a D-U-N-S number
How to create/get a D-U-N-S number?
To view your organization's D-U-N-S number, you can use the D-U-N-S Number look-up tool
If you're registering a first name for a D-U-N-S number, you will be asked for the following business information:
The legal name of your company/entity
Registered/headquarter address
Mailing address
Contact Information
You may also receive a verification call from the D&B team. Note: Once you've completed setup for your D-U-N-S number, it takes up to 14 business days for D&B to provide updated information to Apple.