I primarily use Google Voice for texting, rather than Verizon, and only occasionally get a text via Verizon on my DX. Checking my account status today, I found 4 text messages supposedly sent to me between 10/31 & 11/2 - all from area code 415, and the same prefix 689, but four different numbers. None of the messages appeared on my DX, and none of those numbers are known to me. I tried a reverse lookup on all four on Verizon, but it didn't show anything.
Verizon couldn't explain it, and suggested I just wait for the billing cycle to see if I am billed for them, but I'm really troubled by what the heck they might be, and to see if anyone else has had a similar experience.