Do ISP's assign private ip addresses?

If a computer connects directly to the internet (not being behind a router but connects to a cable/dsl modem), does it get assigned a private ip address or public ip address by its ISP?

Tags: networks

GLeung

18th Mar 2011

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3 Votes

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It must be a public IP address - possibly excepting some wireless ISPs.

Some wireless ISP's may assign you an address in RFC 1918 private address space as you are generally NATted in their network anyway. Or they may assign a public IP which is yet proxied and/or NATted and shared among multiple customers.This is because there simply aren't enough public IPs available to give each mobile phone it's very own IP. Italian ISP's, for example, are well-known for practicing the latter.

Router or modem, it makes no difference, even if you are using dial-up with an internal modem. You should have a public IP under most circumstances.

seanferd

18th Mar 2011

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Hi! I was looking for the exact kind of information and It was obviously helpful =). Could you please specify about the second way (similar public-ip shared between multiple consumers and proxied)? I would appreciate your answer in advance.

mrafaqi 7th Jan 2012

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adilnayab

12th May 2011