Get a user’s IP Address using just JavaScript (and an API call)

I have used IP Chicken for checking my public IP Address for pretty much 15 years (since hearing about it on TechTV).  Once upon a time, I tried writing my own alternative in ColdFusion but it is a lot of overhead for such a dumb thing.  I started wondering if I could do it with …

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What are IP address classes?

IPv4 addresses are divided into five classes.  Each IP address class has a different maximum number of IPs that exist within it. Class First Octet Range Default Subnet Mask Maximum Number of Hosts Per Network A 1-127 255.0.0.0 16,777,214 Hosts (2^24-2) B 128-191 255.255.0.0 65,534 Hosts (2^16-2) C 192-223 255.255.255.0 254 Hosts (2^8-2) D 224-239 …

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