Q. What kind of location data is commonly available in telco domain?
a) GPS coordinates
b) VLR (location of serving site)
c) Zip code
d) Home and work address
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Correct answer: Letter b.
In telecom, the most commonly available location data comes from the VLR (Visitor Location Register), which records the location area code (LAC) and cell ID corresponding to the serving site. This enables tracking of a subscriber’s position within the network — not precise like GPS, but sufficient for mobility and service management.
Q. What kind of location data is commonly available in telco domain?
a) 
GPS coordinates
→ Incorrect. Although possible in some services, GPS data is generally not available at the core network level.
b) 
VLR (location of serving site)
→ Correct. The VLR stores information about the location area and cell site serving a mobile device.
c) Zip code
→ Incorrect. Zip codes are not native to telecom systems; they are geographic and postal data.
d) Home and work address
→ Incorrect. Personal address data is not typically available in the telco network layer.