service provides Pro Blacklist status about any GSM devices.
Note: Note all providers send reports to the international GSMA IMEI Database.

Sample:
IMEI: 354378063559xxx
Model: APPLE IPHONE 6 PLUS (A1524)
Blacklist Status: BLACKLISTED
Blacklisted By: SPRINT
Blacklisted On: 2016-07-16 06:42:56.0
Blacklisted Country: UNITED STATES

Or:
IMEI: 354385060133xxx
Model: APPLE IPHONE 6 PLUS (A1522)
Blacklist Status: CLEAN

Or:
IMEI: 353754070063xxx
Model: SAMSUNG SM-G928T
Blacklist Status: CLEAN
Blacklisted By: T-MOBILE USA, INC
Blacklisted On: 2017-08-02 03:55:48.0
Blacklisted Country: UNITED STATES
Removed By: T-MOBILE USA, INC
Removed On: 2017-08-02 03:55:49.0
Removed Country: UNITED STATES