US Immigration from Netherlands

At what point in the process (USCIS, NVC, interview, greencard received) do you receive your A# number?

I am currently at NVC stage completing form DS-260 online and it is asking if I was issued an Alien registration number (after it asked if I have ever been in the US). On my USCIS I-130 Approval Notice there is a 9 digit number starting with 'A' on the top right corner next to beneficiary. Is this my A# number? I have never received a visa before, nor lived or worked in the US. Any help would be appreciated! Really don't want to mess this up.

Hi y'all!!

Okay, here's my situation.
I applied for my SSN 2 weeks after coming to the US. Nov 16th I think.
I never got the card in the mail. I have my SSN, but not the card. We had an appointment to see what was going on, but we didn't bring all my stuff like birth certificate etc, so she couldn't do anything but give me my number. Ok, that's something right?
(There was a lot of time between applying and this appointment because there was a 3!!! week wait for appointments and then I obviously made one on the day they closed for the death of president Carter....)
Now, my K1 expires jan 30th. 2 days. I called to see what they exactly needed to issue a new card.
She said because my I-94 expires within 15 days, they can not issue me anything until I can provide anything about my currrent status. I'm GUESSING that a receipt of filed 485 would be enough, but she couldn't give me a clear answer on that.
I don't have my receipt yet, so I can't do anything yet. But this whole thing is just vague..

Does anyone know what exactly I need, or if I even can do anything until I get my I-765 approved?

I'm honestly clueless and feel defeated lol

Not sure where to post this, feel free to move.

I filed for AOS on July 5th, 2024. Had fingerprints taken in September and nothing since. I am not in a terrible hurry, but I am seeing quite a lot approvals for July filers and later and I am worried I might have received an RFE or something that never arrived. Should I see the RFE in my case updates in my USCIS account? So far it just says case received for my vaccine waiver and fingerprints taken for my I-485. I do realize that filing a waiver might delay the case, just making sure here I am not missing an RFE.

Good news! Covid-19 vaccine waived for I-485 filers.

https://www.visalawyerblog.com/breaking-news-u-s-citizenship-and-immigration-services-uscis-waives-the-covid-19-vaccination-requirement-for-adjustment-of-status-green-card-applicants/

https://www.uscis.gov/i-693