RFC 1918 reserves three ranges for private networks: (one Class A), ( Class Bs), and ( Class Cs). These addresses never appear on the public internet. Routers drop them. Your home network likely uses . Private addressing combined with NAT lets millions of networks reuse the same addresses internally.
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$ curl repovive.com/roadmaps/network-design/ip-addressing-and-subnetting/private-ip-ranges-rfc-1918
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