It appears it's the 2nd possible form of the NAME field as documented here:
http://www.zytrax.com/books/dns/ch15/#name
NAME This name reflects the QNAME of the question i.e. any may take one of TWO formats. The first format is the label format defined for QNAME above. The second format is a pointer (in the interests of data compression which to fair to the original authors was far more important then than now). A pointer is an unsigned 16-bit value with the following format (the top two bits of 11 indicate the pointer format):
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
1 1
The offset in octets (bytes) from the start of the whole message. Must point to a label format record to derive name length.
Note: Pointers, if used, terminate names. The name field may consist of a label (or sequence of labels) terminated with a zero length record OR a single pointer OR a label (or label sequence) terminated with a pointer.
where the response is using pointers to refer to data elsewhere in the message.