I've tried to find documentation on if Asterisk supports DNS SRV records for sip servers. Reading the source of channel_sip.c it seems not: hp = gethostbyname(hostname); if (!hp) { ast_log(LOG_WARNING, "Host '%s' not found at line %d\n", hostname, lineno); return -1; } This is in the register part. Am I correct in this or have I missed something? /Olle