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When your phone number goes MIA and how to get it back

· 8 min read
Nader Jaber
Head Honcho @ FlyNumber

A man squatting while on the phone with a concerned look on his face with dead trees and broken devices in the background.

It's the nature of the business to release a phone number back to a "pool" for others to buy/lease after they're no longer being paid for.

-Nader Jaber, Founder of FlyNumber

Nowadays our phone numbers have become more than just a string of digits. They are our identifiers, gatekeepers, and connectors in a world increasingly reliant on digital communication. But what happens when that crucial link suddenly disappears? You dial your number, and there's no ring, no voicemail, just the unsettling silence of a number that's no longer yours.[^1]

Understanding and combating SIP-based VoIP abuse

· 5 min read
Nader Jaber
Head Honcho @ FlyNumber

Renaissance-style painting of a man in medieval clothing and a green hat working on a modern laptop computer, creating a humorous contrast between historical and contemporary elements

Introduction: The Hidden World of SIP Security

I was browsing around on Hacker News and if you're not familiar, the good stuff is usually in the comments. I was intrigued by this comment (by @kkielhofner) and how he/she illustrates a common but often overlooked misconception about SIP. Specifically, the misunderstanding pertains to the role and implications of port 5060 and its associated traffic in a standard SIP deployment.

Customize incoming caller ID

· 3 min read
Nader Jaber
Head Honcho @ FlyNumber

Introduction: The Power of Caller ID Customization

One of the standout features of our cloud phone system is the ability to edit the caller-ID for the phone receiving the FlyNumber calls (only when using VoIP). This comes in handy when you need to distinguish between calls coming in from different phone numbers.

Imagine having a UK, Canada, and US FlyNumber ringing directly to your smartphone or a desktop VoIP phone (such as Grandstream or Yealink). By default, you'll see the caller-ID of the person calling the FlyNumber, but you won't know which FlyNumber they called.