I was concerned about this as well. I checked out the official Citibank site - the number is listed:

https://online.citibank.com/US/JRS/portal/contactus.do?ID=ContactUsCards

Confirmed - the number is 100% fake.

Missing the point folks - NEVER give out personal information on a phone call YOU did not make. It's the bank calling? Call them from the phone book, back of credit card,or bank statement. Correct, incoming calls can be spoofed. If they call, just tell them you'll have to call them back. If they say they'll call back later, reel in the red flags.

I don't know who is so set on making us think this is a fake number, but it's right there on the CitiBank site:
https://online.citibank.com/US/JRS/pands/detail.do?ID=AOApplicationStatus

Now, it is possible that someone is spoofing this number on the Caller ID info, but why would I only start getting calls from this number after applying for a card? Bottom line: They should already have your info if they're legit. Don't give out enough info to allow identity theft.

I received a call from this number on my phone and I went to check to see if the phone number is on the citibank website and I can't find it anywhere on there.

This is a fake number! go to the OFFICIAL website and look for the number...its not there!! the link above in the previous notes is a FAKE one! a fake LINK!!! I was approved for a $2000 limit credit card and when I was transferrred to customer service, the "rep" asked for my soc security number and then asked waht bank I make my primary payments with AND then asked for my routining number!!! WTF...luckily I don't know it....those greasy, lazy, thieving bumbs...I hope karma gets them! I know the economy is rough, but dont take MY money!!!!  
oh...I called back and got da same Indian woman...skank! You know when you call a real answering service, you dont get the same person!! And I think they stall with their answering service, but acting like they didnt get ur info and asking u to put it in again!! :o( Im pissed...Ima go home after work and spend all my money in my account before they do!

Going threw the exact same thing that you described.

called a few times ...leaves no messages...

I'm sure you are right.  This is CitiBank.

I applied for their new American Express Mastercard through Citi Bank a couple of days ago and gave them my phone number.  I also told them they did not have permission to call me to try to sell me products, etc. and they said it would only be used in the case of an emergency.  Just got a robo call from 888 201-4523 and hung up immediately without replying.  Gotta be Citi!

This number is listed on Citibank's official site.
Go to the main page, click on "CONTACT US" at the top of the page.
On the new page, click on "CREDIT CARDS" on the left.
The number will be listed under the heading "Credit Card Application Status" midway down.

yea i got one today, but when they phone machine asked for me to put in my social security# i didnt feel comfortable doing that, especially since i wasnt speaking to a live person..

I don't answer a phone call without some ID....And if they don't leave a message.

The number is fraudulent - not Citibank.

Beware of the shills posting lies - the number is bogus.  Do not provide any information and report the fraudulent call to Citibank and your state Attorney General.

Repeat - the number is a fraud - not Citibank.

Part of a fraud campaign targeting numerous financial institutions.  Note the pattern of shill postings all claiming the number is real - an obvious giveaway.

The large number of phony posts claiming the call is real come from some con artists spamming the site to try to fool people.  There is a similar pattern to other fake calls claiming to be from Chase, Citibank, Bank of America, US Bank, Wells Fargo, RBC, PayPal, etc. all with the same shill postings:

http://800notes.com/Phone.aspx/1-866-750-9107/12

http://800notes.com/Phone.aspx/1-302-731-1166/2

http://800notes.com/Phone.aspx/1-800-555-0433

http://800notes.com/Phone.aspx/1-800-454-9078

http://800notes.com/Phone.aspx/1-302-731-1166

http://800notes.com/Phone.aspx/1-800-669-0102

http://800notes.com/Phone.aspx/1-866-255-3409/3

http://800notes.com/Phone.aspx/1-904-954-7500

http://800notes.com/Phone.aspx/1-402-935-7733/2

http://800notes.com/Phone.aspx/1-800-830-8574

http://800notes.com/Phone.aspx/1-800-824-9289/10

http://800notes.com/Phone.aspx/1-888-800-5234

http://800notes.com/Phone.aspx/1-602-766-6484/3

http://800notes.com/Phone.aspx/1-800-824-9289/10

http://800notes.com/Phone.aspx/1-888-800-5234

It is Citi Cards.
I applied for a credit card last night and called in to expedite the approval process. I was asked if I would like to add my phone number to my account. I asked what it would be used for. The associate told me that it would only be used for emergency contact information in the case of suspicious activity. I must have asked in at least three different ways if it would be used for anything else, especially advertising. I was reassured that no such calls would be made...well, I've received two calls so far today. I called Citi to ask them about the calls and was told that they were about my approval. They were calling to let me know that I was approved. I told the representative that I already knew I was approved since I had called last night. The representative then told me that I may receive calls in the future, because "they" do not have any control over the automated calling. Really?! I then inquired about the fact that I was even receiving calls since they were not emergencies. I explained what the representative had said to me over the phone the night before, and I was told that not all the necessary information had been shared with me. So, I asked if I could then remove my phone number from my account. I was then told that the information is now locked and unremovable.

I've been getting three calls a day on my cell, every day from this number.  Same type of information as others have commented.  I have never dealt with Citibank or need to.  I want this to stop. They keep leaving a voice mail for me to call them at certain hours.  What a nuisance!  Reverse look-up says it is a toll-free number.  That doesn't help me!

PLEASE DO NOT CALL THIS NUMBER AGAIN

It is Citibank.  I went to Citbank.com and navigated to this site    https://online.citibank.com/US/JRS/portal/contactus.do?ID=ContactUsCards where you can see this number.  I am extra cautious, as my personal information has been used fraudulently.

Good luck!

WRONG. I dont know who you talked to but this IS citibank. I went to Citibank and opened an account. I applied for a credit card and this is the number on the application, I call this number a lot to check on my status.

DONT FRET!!!! It is a real number. It is Citibank. I just applied for a secured credit card and I have been calling them everyday. I just missed a call and called back. I got approved. I dont know  what the guy is talking about with the FBI. If you got to Citibank website under secure credit cards, you will see the number there. The system does ask for you SSN and bday etc to track you. If you dont have Citibank account or havent applied for a credit card with them, then dont enter anything. It is as simply as that.

...just to clerify. This automated message never asked for my SS. Only if my name was XXXX and my zip code.

I am guessing it is legit. It only asked me for my Zip Code. I wasn't going to give them the last four of SS. I did apply for a card last week. So I bet its fine. It said i had a new credit card limit of $1300. If it was a scam I think it would say much much more than just $1300. Continue to be cautious out there, but unless you KNOW you haven't applied for a card, or want a card just ignore it or you can answer it and it will ask you if you are "JOE Smith, press 1, if you are not press 2". Just answer and press two and it will say sorry for the inconvenience.

But of course they are.

Fail!

wrong..it is citibank or a division of...my girlfriend just applied for a card and it has to do with e-mail contacts from them..

Received a call from CitiBank (888-201-4523) from Maggie in So. Dakota requesting we call to verify some information. We're in Connecticut and have had a mortgage modification application pending for the last year and a half. When we called someone, India sounding, answered.
We're dealing with CitiMortgage, not CitiBank. The only in we got was that our application was being processed--duh.
Never got Maggie.

Thank you for your help

Looks like citicard.

number is on my caller ID 3 or 4 times in a day. Leaves no messages.

This is the application department for Citi. You must have submitted a credit card application from Citi.

It is Citi Cards but they are calling to tell you that you have been approved.  It's super annoying to because they keep calling till you pick up!  Even though I have already gotten email and snail mail from them and the person who helped me online verified that I was approved.  So annoying!  I hope this is not foreshadowing of how it will be to have a card from them.