Update: Most people are able to see the case status now. If you are still seeing the error, you should re-start your laptop or phone and try again.
If re-starting does not work, try clearing your internet browser cache and then try.
Earlier, many people reported from various cities in US including Boston, New York and San Francisco that they received this error on USCIS website while they tried to check their case status.
Do not worry. You are not alone. It seems that USCIS website has encountered and issue and it should be resolved soon.
The USCIS IP address blocked error message:
IT WAS REPORTED TO US THAT YOUR IP ADDRESS OR INTERNET GATEWAY HAS BEEN LOCKED OUT FOR A SELECT PERIOD OF TIME. THIS IS DUE TO AN UNUSUALLY HIGH RATE OF USE. IN ORDER TO AVOID THIS ISSUE, PLEASE CREATE A CUSTOMER ACCOUNT (SINGLE APPLICANT) OR A REPRESENTATIVE ACCOUNT (REPRESENTING MANY INDIVIDUALS).
Use DHS USCIS Website to check Case Status
While USCIS fixes their issue, you can use another website commonly called DHS website or new USCIS website link:
You will need to create a user account on this DHS website and then add your USCIS case receipt number. Once you add the number, you can see the case status.
The DHS website is in-fact better than USCIS website as it gives faster status updates.
In cases where your case receipt number is not recognized by USCIS website, the DHS website may accept the receipt number with no issues.
Genuine IP Address Blocked Message
USCIS case status website does block your IP address in cases where you try to use it to check 1000+ cases. There are people who use a computer browser script to get details of all cases available on the website which is legally not allowed.
In those cases, USCIS does block your IP address access to USCIS website for a limited time of usually 24 hours.
If you have not run that script or have not used an app or a website that’s actually running the script, you are fine.