Here is a ptr query from
http://www.dnswatch.info. Looks like there is a loop but it should resolve when directly queried from your bind server. Are you querying directly from the an authoritative server or from some other server that does a complete dns traversal ?
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Searching for 24.179.165.66.in-addr.arpa. PTR record at K.ROOT-SERVERS.NET. [193.0.14.129] ...took 9 ms
Searching for z.arin.net. A record at A.ROOT-SERVERS.NET. [198.41.0.4] ...took 87 ms
Searching for m.gtld-servers.net. A record at I.ROOT-SERVERS.NET. [192.36.148.17] ...took 3 ms
Searching for m.gtld-servers.net. A record at m.gtld-servers.net. [192.55.83.30] ...took 132 ms
Searching for z.arin.net. A record at m.gtld-servers.net. [192.55.83.30] ...took 127 ms
Searching for z.arin.net. A record at c3.nstld.com. [192.26.92.32] ...took 87 ms
Searching for 24.179.165.66.in-addr.arpa. PTR record at z.arin.net. [199.212.0.63] ...took 101 ms
Searching for ns1.voxtelecom.net. A record at L.ROOT-SERVERS.NET. [198.32.64.12]
Query timed out (interrupted after 1,999 milliseconds)
Retrying...
Searching for ns1.voxtelecom.net. A record at E.ROOT-SERVERS.NET. [192.203.230.10] ...took 172 ms
Searching for ns1.voxtelecom.net. A record at E.GTLD-SERVERS.net. [192.12.94.30] ...took 19 ms
Searching for 24.179.165.66.in-addr.arpa. PTR record at ns1.voxtelecom.net. [66.165.177.121] null
Searching for 24.179.165.66.in-addr.arpa. PTR record at ns2.voxtelecom.net. [66.165.177.122] ...took 135 ms
Searching for 24.179.165.66.in-addr.arpa. PTR record at ns1.voxtelecom.net. [66.165.177.121] null
Searching for 24.179.165.66.in-addr.arpa. PTR record at ns2.voxtelecom.net. [66.165.177.122] ...took 135 ms
Searching for 24.179.165.66.in-addr.arpa. PTR record at ns1.voxtelecom.net. [66.165.177.121] null
Searching for 24.179.165.66.in-addr.arpa. PTR record at ns2.voxtelecom.net. [66.165.177.122] ...took 133 ms
Searching for 24.179.165.66.in-addr.arpa. PTR record at ns1.voxtelecom.net. [66.165.177.121] null
Searching for 24.179.165.66.in-addr.arpa. PTR record at ns2.voxtelecom.net. [66.165.177.122] ...took 135 ms
Searching for 24.179.165.66.in-addr.arpa. PTR record at ns1.voxtelecom.net. [66.165.177.121] null
Searching for 24.179.165.66.in-addr.arpa. PTR record at ns2.voxtelecom.net. [66.165.177.122] ...took 135 ms
Searching for 24.179.165.66.in-addr.arpa. PTR record at ns2.voxtelecom.net. [66.165.177.122] ...took 135 ms
Searching for 24.179.165.66.in-addr.arpa. PTR record at ns2.voxtelecom.net. [66.165.177.122] ...took 135 ms
Searching for 24.179.165.66.in-addr.arpa. PTR record at ns1.voxtelecom.net. [66.165.177.121] null
Searching for 24.179.165.66.in-addr.arpa. PTR record at ns2.voxtelecom.net. [66.165.177.122] ...took 135 ms
Searching for 24.179.165.66.in-addr.arpa. PTR record at ns2.voxtelecom.net. [66.165.177.122] ...took 135 ms
Searching for 24.179.165.66.in-addr.arpa. PTR record at ns2.voxtelecom.net. [66.165.177.122] ...took 135 ms
Searching for 24.179.165.66.in-addr.arpa. PTR record at ns2.voxtelecom.net. [66.165.177.122] ...took 135 ms
Searching for 24.179.165.66.in-addr.arpa. PTR record at ns2.voxtelecom.net. [66.165.177.122] ...took 134 ms
Searching for 24.179.165.66.in-addr.arpa. PTR record at ns1.voxtelecom.net. [66.165.177.121] null
Searching for 24.179.165.66.in-addr.arpa. PTR record at ns2.voxtelecom.net. [66.165.177.122] ...took 135 ms
Searching for 24.179.165.66.in-addr.arpa. PTR record at ns2.voxtelecom.net. [66.165.177.122] ...took 136 ms
Searching for 24.179.165.66.in-addr.arpa. PTR record at ns1.voxtelecom.net. [66.165.177.121] null
Searching for 24.179.165.66.in-addr.arpa. PTR record at ns2.voxtelecom.net. [66.165.177.122] ...took 134 ms
Searching for 24.179.165.66.in-addr.arpa. PTR record at ns2.voxtelecom.net. [66.165.177.122] ...took 134 ms
Searching for 24.179.165.66.in-addr.arpa. PTR record at ns1.voxtelecom.net. [66.165.177.121] null
Searching for 24.179.165.66.in-addr.arpa. PTR record at ns2.voxtelecom.net. [66.165.177.122] ...took 134 ms
Searching for 24.179.165.66.in-addr.arpa. PTR record at ns2.voxtelecom.net. [66.165.177.122] ...took 135 ms