For abuse reports
Email abuse@us.telefonica.com
Use plaint text (no HTML) and no attachments. Include IP address, time/date, complete message headers, and attack logs.

For Subpoena Requests
Email engops@us.telefonica.com
with "SUBPOENA" in the subject line. Law Enforcement Agencies ONLY, please.

For Telefonica USA Stance about Abuse, including spam
please check http://www.us.telefonica.com/legal/AUP_online.htm