What does GTSN stand for?
GTSN stands for "Global Telephony Subscriber Number"
How to abbreviate "Global Telephony Subscriber Number"?
"Global Telephony Subscriber Number" can be abbreviated as GTSN
What is the meaning of GTSN abbreviation?
The meaning of GTSN abbreviation is "Global Telephony Subscriber Number"
What does GTSN mean?
GTSN as abbreviation means "Global Telephony Subscriber Number"
