Reverse HLR Carrier Network Lookup service FAQ



  1. What is HLR lookup, Carrier Lookup, Network Lookup services?
  2. Why should I use this Network Lookup service?
  3. Can I automatically do a Carrier lookup?
  4. What is the accepted payment method?
  5. How are credits decremented (charged)?
  6. How about a few examples of when it works best?
  1. What is HLR lookup, Carrier Lookup, Network Lookup services?
    Number Portability check, HLR lookup, Carrier Lookup, and Network Lookup are the same service that identifies the name of the mobile operator (carrier) based on a given mobile phone number.

  2. Why should I use this Network Lookup service?
    Perhaps you have a list of older opt-in mobile phone numbers that you would like to re-verify the identity of their mobile operators. Or you would like to use Email to SMS or Email2SMS (sending SMS using emails) method to send SMS to users who agree to receive such, and you would like to provide a convenient feature to the users by automatically identifying their mobile operator.

  3. Can I automatically do a Carrier lookup?
    Yes, we provide a simple HTTP GET API for the purpose of Number Portability check/carrier lookup. The HTTP link is found inside your login account. There is also a manual interface for you to enter a cellphone number to retrieve the lookup result. Simply register an account now.

  4. What is the accepted payment method?
    We accept Paypal payments from users with a verified mailing address. You can buy credits in your login account. There is no setup cost or long term contract. If you do not have a paypal account, you can still pay via credit card when our system redirects you to the paypal site.

  5. How are credits decremented (charged)?
    The lookup result or reply can be a positive identity of a carrier (such as TMOBILEUS), or UNKNOWN, or FAILURE. You are charged for any of these 3 possible results. A lookup that returns UNKNOWN means the network that the Mobile Number resides on is unrecognized. This can be the case when the network is not supported or listed in our Carriers Coverage page. A lookup that returns FAILURE usually is the result when the number is landline or non-mobile.

  6. What is the meaning of Credits Expiration Date or Expiring Date, or Expiring Credits Date?
    On the date your package of credits is purchased, you have a limited period of time in which to use all the credits in that package. Once the expiration date has arrived, any unused credits will expire to zero. You can buy any number of credits package on any date and each package will have its own expiration date. Our number portability network lookup system will first decrement the credits from the oldest purchased credits package.