TATA, CableVision, Verizon IP reassignment contacts?

[Chip Parker <infowolfe () gmail com>]

Does anybody have any contacts for IP assignment/reassignment with:
TATA
CableVision
MCI dba Verizon

I'm looking to talk to someone at each of the above companies about
some reassignments that I've inherited from a company that the company
I work for purchased a few years ago.

TL;DR trying to "fix" reassignments in ARIN, but can't without contact
with the above companies. Trying to find a contact that'll speak to me
about fixing these reassignments.

TIA
Chip Parker