ayuda.tigo.com.bo has no NS records.
NS records for this zone are defined at tigo.com.bo.
NS records for this zone are defined at tigo.com.bo.
Question and response
Question
dig tigo-chat-prod-bo-alb-1412593227.us-east-1.elb.amazonaws.com. NS
Answer
The response has no answer records.
Authority
us-east-1.elb.amazonaws.com. 60 SOA ns-1119.awsdns-11.org. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 60
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0