History of IP allocations at Penn State

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A brief history of IP address allocation at Penn State, based on whois data.

March 31, 1986:

We got five Class C networks (256 addresses each):

192.5.157.0/24
192.5.158.0/24
192.5.159.0/24
192.5.160.0/24
192.5.161.0/24
We also got a Class B network (65,536 addresses):

128.118.0.0/16

October 5, 1988:

The Department of Computer Science and Engineering got its own Class B network (so another 65,536 addresses):

130.203.0.0/16
A good portion of this space is shared with the rest of the University. For example, about 3,300 of these addresses are in the University's dial-up modem pool.

February 26, 1991:

We got another Class B network (another 65,536 addresses):

146.186.0.0/16

August 7, 1991:

The Hershey Medical Center got a Class B network. This netblock was and still is managed by Hershey Medical Center, not by ITS.

150.231.0.0/16

September 25, 1991:

We got another Class C (256 addresses):

192.112.253.0/24

February 5, 2001:

We got a /17 (32,768 addresses):

66.71.0.0/17
This is used for the residence halls.

January 13, 2006:

We got our permanent IPv6 prefix (which can hold 4,294,967,296 sub-networks, with 18,446,744,073,709,551,616 addresses each):

2610:8::/32

Summary:

Total IPv4 addresses assigned to Penn State: 296,448

A little over half of those addresses are managed by ITS. While it seems like PSU has a lot of addresses (and we do), ITS estimates that we'll run out in less than 5 years. More on that in a future blog entry.

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