Certificate of Naturalization Number

[vishwaskaroo]

Friends,
I got naturalized recently. I am now filling a I134 (affidavit of support) to apply for my mother in law's visitor visa. In there it asks for Certificate of Naturalization Number. What is the Certificate of Naturalization number? I see on my naturalization certificate there are 2 numbers:
1st at the top right. Says No. XXXXXXXX It is a 8 digit number (all numbers, no characters)
2nd is below the 1st number. Says CJS Registration No: AXXXXXXXXX (this is same as my alien registration or green card number).

Which one of this is the certificate of naturalization number?

Thanks in advance for your help.

 

[boatbod]

Here's a clue... its the one that's not your A number.