It is Registered as follows:

Registrant:
Ean Rollings
Ean Rollings
18 Lovett Street
Beverly, MA 01915
US
Email: [email protected]

Administrative Contact:
DIGITAS
Ean Rollings
800 Boylston Street
Boston, MA 02199
US
Phone: 617-867-1000
Email: erollings@digitas.

Digitas web site discribes itself as:
"Digitas designs, builds, and runs the large-scale marketing engines that help translate our clients’ visions into ongoing marketing programs that form stronger relationships between brands and customers. With expertise more than two decades in the making, we are an acknowledged leader in the digital and direct marketing industry".

Delta.com is clearly listed to Delta:

Registrant:
Domain Administrator
Delta Air Lines Inc.
1030 Delta Blvd, Dept 790
Atlanta GA 30320-6001 US