SIMlock status check gives you detailed information of the lock status.
 
Example:

 Report Type: Apple Carrier/SIM lock info by IMEI
Submitted @ 19:12:27 - 12, March 2019
Report ID: 1536945


 
 
  
SIM LOCKED
 
 Device: iPhone 6 Space Gray 32GB A-1549
IMEI Number: 352**************
Serial Number: FF***********
Manufacture Date: 18 Jul 2018
Unit Age: 7 months and 26 days
Find My iPhone: ON
GSMA/Blacklist: Clean
Carrier: 4452- US T-Mobile 
Country: United States
SIM-Lock: Locked