Ec200 problem :we want domain name but module gives me a ip adress instaed of domain name

IoT Modules LTE Standard Module
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1

AT+QMTOPEN?\r\n we want domain name but module gives me a ip adress instaed of domain name

2

After the program executes QMTOPEN, if a domain name is used, the modem will enable DNS to resolve the domain name, then initiate the TCP three-way handshake, complete the MQTT connection. Therefore, AT + QMTOPEN? The result returned by the query is IP.