Need to find software

I need to find a software that can know if the phone number of another person is active without calling the main number to check. I used to know this software but forgot the name. I’m not good at English. hope everyone please help me.

I’m afraid we can’t help you on this.

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Thank you for your interest. Can you tell me how to get lac and cellid on iphone phone?

I use netmonitor software. Pretty good application can know lac and cell id on adroid phones. Can you introduce me some other software not.

I haven’t used netmonitor, but I personally like Network Signal Info:

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