The uncertainty you are feeling right now is completely normal, and the lack of information is not a sign that something is wrong. It is standard procedure.
Huntsville is the Texas Department of Criminal Justice's primary intake and processing facility. When an inmate arrives there from a county jail, the classification process begins. TDCJ evaluates the person's criminal history, the nature of the offense, their institutional behavior, medical and educational needs, and available bed space across the system. That assessment determines both the custody level and which specific unit the inmate gets assigned to for the duration of their sentence.
The destination is deliberately not made public until after the inmate has physically arrived at the receiving facility. This is a security measure that protects both the corrections officers conducting the transport and the inmates being moved. Knowing in advance where someone is going creates opportunities for outside interference that the system works hard to prevent.
For a first-time offender, the classification process at Huntsville typically takes a few weeks. Once he is designated and transported to his permanent unit, his information will become searchable through the TDCJ offender search at tdcj.texas.gov. You will be able to find his unit assignment, contact information for the facility, and his projected release date once that record updates.
In the meantime, sending a letter to him at Huntsville keeps communication going during the transition. Mail follows inmates through the TDCJ system, and having something arrive during the classification period matters. Once he lands at his permanent unit, call that facility to start the visitation application process and get your number set up for calls.