gridmaster.telefonica.com.sv has no SRV records.
Question and response
Question
dig gridmaster.telefonica.com.sv. SRV
Answer
The response has no answer records.
Authority
telefonica.com.sv. 3600 SOA gridmaster.telefonica.com.sv. root.telefonica-ca.net. 2022110466 3600 3600 3600 3600
Additional
. 0 OPT ; payload 1220, xrcode 0, version 0, flags 0