Recorded calls from 866-398-4399 very early in the morning & late in the evening (I live in the EST time zone). Heavily accented voice, saying they'd called several times & had never received a response. I finally called from a different phone asking who this company was & what they did. Talked to an Indian gentleman -- wouldn't give me his name. Very rude, hung up on me after I asked 3 different times what they did & was given 3 different answers.
Upon googling, I found this: http://www.aegisglobal.com/section_level2.aspx?cont_id=QKlu5QBggj4=
Check out the contact info -- it's all overseas. No American numbers.
Additionally, they are not accredited w/ the BBB in San Diego & have an "F" rating: http://www.bbb.org/san-diego/business-reviews/collection-agencies/aegis-receivables-management-inc-in-irving-tx-171988338/
On a final note, I get an updated credit report every month. I have no delinquent accounts.