Do you mean because it's a Corpus Christi, Texas, cell phone number? Or for some other reason.
I don't know anything about the trailer or seller, but Corpus is a popular "winter Texan" spot, which might explain it. Or not.
Raya
PS: Oh, wait a minute. I'm just a bit slow. You meant because it's not an Oklahoma number. Not because it is not an "okay" number.