Domain .TOP not resolved by Google Public DNS

[CAN VU XUAN]

Dear all

Now all domain .top did not resolved by Google Public DNS

Can you check the problem with Google ?

Thanks and the best regards

nslookup
> set debug
> server 8.8.8.8
Default server: 8.8.8.8
Address: 8.8.8.8#53
> thietkevanphong.top
Server:        8.8.8.8
Address:    8.8.8.8#53

------------
    QUESTIONS:
    thietkevanphong.top, type = A, class = IN
    ANSWERS:
    AUTHORITY RECORDS:
    ADDITIONAL RECORDS:
------------
** server can't find thietkevanphong.top: SERVFAIL
> www.nic.top
Server:        8.8.8.8
Address:    8.8.8.8#53

------------
    QUESTIONS:
    www.nic.top, type = A, class = IN
    ANSWERS:
    AUTHORITY RECORDS:
    ADDITIONAL RECORDS:
------------
** server can't find www.nic.top: SERVFAIL
> server 8.8.4.4
Default server: 8.8.4.4
Address: 8.8.4.4#53
> www.nic.top
Server:        8.8.4.4
Address:    8.8.4.4#53

------------
    QUESTIONS:
    www.nic.top, type = A, class = IN
    ANSWERS:
    AUTHORITY RECORDS:
    ADDITIONAL RECORDS:
------------
** server can't find www.nic.top: SERVFAIL