அது என்னடா HLR VLR?? | Tamil Spyboy

VLR
Definition – What does Visitor Location Register (VLR) mean?
A visitor location register (VLR) is a database that contains information about the subscribers roaming within a mobile switching center’s (MSC) location area. The primary role of the VLR is to minimize the number of queries that MSCs have to make to the home location register (HLR), which holds permanent data regarding the cellular network’s subscribers.

Ideally, there should be only one visitor location register per MSC, but it is also possible for a single VLR to serve multiple MSCs.
https://www.techopedia.com/definition/9951/visitor-location-register-vlr

HLR
The Home Location Register (HLR) is the main database of permanent subscriber information for a mobile network. The HLR is an integral component of CDMA (code division multiple access), TDMA (time division multiple access), and GSM (Global System for Mobile communications) networks. Maintained by the subscriber’s home carrier (or the network operator where the user initiated the call), the HLR contains pertinent user information, including address, account status, and preferences. The HLR interacts with the Mobile Switching Center (MSC), which is a switch used for call control and processing. The MSC also serves as a point-of-access to the Public Switched Telephone Network (PSTN – the fixed network). The third integral element is the Visiting Location Register (VLR), which maintains temporary user information (such as current location) to manage requests from subscribers who are out of the area covered by their home system.
https://searchnetworking.techtarget.com/definition/Home-Location-Register

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gsm vlr visitor location register