1&1 Internet AG

Founded in 1988, 1&1 Internet AG is an affiliate of United Internet, a successful listed company. With over 7.7 million customer contracts, 1&1 is a leading internet provider on the world market. The German company provides a broad selection of sophisticated online applications to private individuals and businesses.

“1&1 operates internationally. Therefore, AddressDoctor's global coverage of more than 240 countries is essential for us. This was a strong selling point and why we selected AddressDoctor over any other provider.”

—Alexander Sauer, Purchasing Manager 1&1 Internet AG


Business Need

Support reliable and accurate registration and hosting of domains for international customers.

Validate postal addresses of international customers at point of entry during the order process. A correct address is required for the order to continue.



For a webhosting order at 1&1, customers must first complete their contact information. Because of the multitude of data entry forms on the Internet, there are a lot of variations.

Different field names, page frames and data flows confuse even the seasoned user. This resulted in incorrect, incomplete or missing customer data.


Solutions & Results

Delivered accurate customer data from the start.

Provided automated correction suggestions.

Supported one unified solution for all countries.

Facilitated monthly update of reference data free of charge.


Products & Services

Address Verification

Our Address Verification solution compares address data to the most up-to-date and complete postal reference data. Includes transliteration, parsing, correcting, formatting and enrichment.

Success Stories


AddressDoctor provides LateRooms a data quality solution with the widest possible country coverage for their global portfolio of hotels.

Emerson Process Management

Delivers time-tested and innovative solutions designed to help customers reduce plant maintenance cost, reduce capital requirements, reduce cost of regulatory compliance and increase process availability.

GSI Commerce

The AddressDoctor Address verification solution enabled GSI to standardize on one unified solution for all countries.