clarification on SOA

[rams]

Hi,

I have one SOA record as follows in zone.

qa.com.   86400   IN SOA ramesh.com. qa.com. (
                    2009111903 ; serial
                    10800      ; refresh (3 hours)
                    3600       ; retry (1 hour)
                    2592000    ; expire (4 weeks 2 days)
                    300      ; minimum (1 day)
                    )

I queried for non exist domain against bind. Bind is returning SOA record
with 300 as TTL value. Is it correct? Because in my zone , SOA has 86400
TTL.

Please clarify me.

Thanks & Regards,
ramesh
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