Hi, I am configuring ser to use enum module. I am getting this error when dns lookup is done from ser. 0(27798) get_record: lookup(8.7.6.e164.arpa, 35) failed 0(27798) enum_query(): No NAPTR record found for 8.7.6.e164.arpa. This is my zone file: $TTL 3D @ IN SOA e164.arpa. root( 4 ; serial (d. adams) 3H ; refresh 15M ; retry 1W ; expiry 1D ) ; minimum IN NS localhost IN NS e164.arpa. localhost A 127.0.0.1 e164.arpa. A 10.200.220.200 $ORIGIN 1.2.3.4.e164.arpa. IN NAPTR 10 100 "u" "E2U+sip" "!^.*$!sip:abcd@e164.arpa!" . $ORIGIN 8.7.6.e164.arpa. IN NAPTR 20 100 "u" "E2U+sip" "!^.*$!sip:xyz@e164.arpa!" . named.conf file contains, zone "e164.arpa" IN { type master; file "/var/named/named.enum"; }; This is my enum code in ser.cfg. loadmodule "/usr/local/lib/ser/modules/enum.so" modparam("enum", "domain_suffix", "e164.arpa.") if (method == "INVITE" && uri =~ "sip:\+[0-9]*+@.") { if (enum_query("e164.arpa")) { route(1); }; }; Its possible to ping the domain e164.arpa from the m/c where ser is installed. Any help in this regard is appreciated. Regards Geethanjali The information contained in this electronic message and any attachments to this message are intended for the exclusive use of the addressee(s) and may contain proprietary, confidential or privileged information. If you are not the intended recipient, you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately and destroy all copies of this message and any attachments. WARNING: Computer viruses can be transmitted via email. The recipient should check this email and any attachments for the presence of viruses. The company accepts no liability for any damage caused by any virus transmitted by this email. www.wipro.com