nope. sorry its a CDMA network, at&t is a GSM network and requires a simcard which this phone does not. It is flashable to other carriers like verizon, cricket, etc. but not AT&T or Tmobile. thanks.
Just as a helpful suggestion: NEVER POST AN ESN FOR A PHONE PUBLICLY. The ESN is the most important number for a CDMA phone, it's better to keep this number private to prevent fraud from being committed.