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IP Addresses Quick Reference Guide.

January 5, 2016 — by Andreas0


ip address cheat sheet

CIDR, Subnet Mask, Total IPs, Usable IPs, IP block
Guide to sub-class C blocks

What’s a /19?  How many IPs do I get to use with a /20?  Well, see the table below!
Usable IPs is the Total IPs. Read more about IPv4 subnetting reference


Subnet Mask

Total IPs

Usable IPs


What is an IP address?

An IP address or an IP address is an address that identifies a connection to the Internet. The IP address used for information sent on the Internet to reach the right computer.

Every Internet-connected computer has an IP address. Sometimes multiple computers to share the same IP address.

An IP address can be dynamic or static. A dynamic IP address is assigned through a server of the Internet service and address can be changed at each connection point. A static IP address is always the same. One calls it a fixed IP address.

Most ISPs only use dynamic IP addresses to private persons. Such an IP address can thus belong to several different people from different parts of the country from one day to another. There are few operators publish static IP addresses.

There are public and private IP addresses. The private IP addresses are used only in local networks and should never occur in the traffic going over the Internet.

The current standard that manages IP addresses, called IPv4. However, with an increased number of users on the network are IP addresses in IPv4 running out. Within the next few years, most companies, organizations and operators move to the new standard IPv6. IPv6 supports virtually unlimited number of IP addresses.

For private users is expected to transition take place relatively painlessly without the need to upgrade either the hardware or software when using a reasonably modern computer and updated operating system. IPv4 will likely operate in parallel with IPv6 for a long time to come.

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IPv4 Depletion – What Comes Next?

October 8, 2015 — by Andreas0


The American Registry for Internet Numbers (ARIN) recently announced that all IPv4 addresses in its free pool are depleted, leaving only IPv4 address blocks remaining. The waiting list is activated and people needing this asset must use the free market to source any addresses.

Why is this important? IP addresses are one of the core pieces of a network – the address dictates where an Internet data stream should go. IPv6 is the replacement, but that standard may not be ready and implemented for a number of years. The industry has known that IPv4 depletion was on the way, so this is not a surprise, but it will most certainly impact various aspects of the Internet.

The Internet was not built for a situation in which all IPv4 numbers would be used – that’s 4.3 billion numbers, gone, when the original engineers and scientists who put the networks together had never dreamed of every IP address being used.

What comes next? ARIN will still be involved, assisting in transfers, returns, and other ways that IP numbers may change hands. But they cannot make up for the shortfall in IPv4 numbers, which will number in the multi-millions by the time IPv6 is ready to roll out.

What was a free product may become something with a market price – people need these addresses, and some may be holding onto them, and willing to put them up for sale, if the reward is great enough. This means the value of IPs may be in constant flux, especially as IPv6 comes closer to implementation. When the new standard exists, formerly valuable IPv4 addresses will not hold the same worth, but it is hard to pin down exactly when that will be.

Prices, so far, have been anywhere from $8 per IP address to $11, and guesses range much higher for the coming years, dependant on need. Experts are predicting prices as high as $26 per IP as time goes on.

Some businesses may be completely caught off guard by this. If you have not budgeted for IPv4 addresses, and do not know where to source them, you have a problem all of a sudden – how are you going to get the IPs you need before IPv6 rolls out?

It’s important to prepare as much as possible for this new world of IPv4 depletion. Start researching how you can get the IPs you need, and come up with a plan to pay for them. The industry will shift to accommodate this change, but businesses must be ready to do their part in solving the problem of IP depletion.

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How SEO Hosting Can Help Your SEO Company

May 26, 2015 — by Andreas0


As a SEO company you are always trying to get more links, especially to international customers. One way to do this is to use multiple European C-classes, which can help foreign websites rank higher in search engine results pages.

Links are what will get your sites ranked, and links that come from websites in the same country as your clients’ websites is the best way to get good results. If you develop C-classes in other countries and hire content writers to fill them out with pertinent information, you can offer these services to your clients who have foreign websites.

With SEO hosting you will own and control these sites and their content, which gives you more say over what goes on, and costs less than buying links.

Pick up multiple IPs from a variety of companies, and use SEO hosting to your advantage. It will cost the same as buying IPs in your own country, but give you far more flexibility and options for clients.