Last update: Jun 30, 2023
HLR or Home Location Register is a telephone database validation service. It lets you know if a mobile number exists, which telecom operator it belongs to and if it is connected to the right subscriber.
HLR queries help you analyze your database and identify inactive or invalid numbers. That is, it is possible to find out which mobile numbers correspond to current mobile subscribers.
Checking a phone number in HLR is legal, because the information contained in this registry is publicly accessible and does not contain personal data. Of course, the HLR system also complies with the provisions of the GDPR and data privacy directives.
This will make your SMS campaigns and sendings 100% effective, as you will only send SMS messages to valid recipients. You will get better results in your sendings (more openings and clicks) and you will save unnecessary expenses in messages that would generate errors due to inactive or non-existent numbers.
The benefits of using this service are multiple. Here are some of them:
Therefore, the HLR service is a highly recommended tool to maximize the efficiency of communications and reduce associated costs. The result is an updated and accurate database of numbers.
The HLR service can be used in two areas:
The HLR check can be performed:
HLR queries have a reduced and unique cost regardless of the country of the mobile number. Therefore, it is necessary to calculate whether the cost of an HLR check is higher than the cost of an SMS and thus discard the number if the SMS generates an error due to the wrong destination number.
Moreover, it is necessary to estimate if a database or a use case has a number of wrong phones to apply a massive HLR check. In many cases it is enough to obtain the results of a first SMS sending and update the database with the errors obtained.
In general, it is advisable to perform a previous HLR check if the number of errors or incorrect numbers is estimated at 15% or higher.
However, in cases where it is decided to send an SMS and update the database or registry with the result (error or delivery confirmation). We recommend not to discard the numbers in the first error as it may be due to multiple reasons (such as temporary network errors, device errors, etc.) and valid numbers would be discarded. In this case we recommend performing an HLR query only to those SMS messages that have generated an error to confirm that they are inactive numbers.
The first step is to register an account on the LabsMobile platform. Once the account is created, it is possible to access the HLR service from the WebSMS application or through the LabsMobile API.
In conclusion, the HLR service is highly effective for all companies or entities that send SMS or make phone calls and want to increase the efficiency of their actions and communications.