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