Block the 1-410-100 messages

Please help

At this point I'm inclined towards the belief that this is AT&T's machiavellian way of upselling their premium call protect services because mine started coming down the same day I had my bill adjusted down to where it was when I began service with them. Over the course of a year, it crept up slowly to almost $25 more than the amount I was supposedly locked in for at the start. 

Okay this "solution" is absolutely useless since the phone number is 9 digits not 10 and every new message is changed to the next number. I've called AT&T twice & it was no hope. I did see that it looks like it's related to the ATT.net email (which is a mess that I can't even access) & AT&T was not able even understand their own site so I could get into it. The reason I think it's related is that I had to update my credit card info & it said about merging email and the account. Soon after I got over 3,000 texts! One gave a clue which said it came through "phone#@txt.att.net".  The only thing at&t said was to contact my company (it's  company phone) to see what they can do. 

Hey all, I think I posted here some time ago. I'm not sure what triggered it but I started getting these messages at the end of November last year. I was getting an average of 30 per day, but almost exclusively during the week and not on weekends -- which makes me think there's some a**hole out there doing this manually, not just a robo-app. AT&T was unwilling or unable to help me and none of the spam filter apps that I installed -- including AT&T's premium paid one -- worked. It was a nightmare and I was almost to the point of changing my phone number. However, after a little over 3 months the messages dwindled down over about a week and then finally stopped. I think they cycled through all the number combinations. I haven't had one of these spam texts in a few months now and I hope to god they never come back.

Hope this helps a little.

These are NOT spam messages in my case. One of our systems monitoring processed sends out texts when a job goes down and we need to take care of it. I want to be able to filter these messages, but since the last 3 digits constantly change, I can't do anything with it. 

I own an iphone SE and was getting messages every week day from 7am to around 8pm but for some reason not on weekends..

Well I think I solved the problem. The messages came from 1(410)100-### and from 1(410)200-### showing FRM:Sonic  Lock N Tow LLC.

1. Go to your contact list

2. ADD contact for, first name put FRM:Sonic (exactly as it shows in the message).

3. enter the numbers -I entered 1(410)100 this showed as (HOME #) I then added the second number 1(410)200 this became the(CELL #)

4. Save it, scroll down to "BLOCK THIS NUMBER" and click it to block. Done... You must type everything just as it is in the messages you are

receiving..

It’s really annoying and every time he or she call from the same number but the last digit is different 

This number send me my address and my name how is that happened?

 Block them but they call from the same number but a different  last digit number 

I am getting them too. Verify Facebook account and today verify visa account. It's getting old

This did not work for me.