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Internet IP Subnets

From Bloomingpedia

This page tries to keep a current list of IP subnets that are from Bloomington and the rest of Monroe County. The information is listed in CIDR format for easy usability by network administrators. Some of these may have sub-delegations that are outside of Monroe County. Also, this information is not complete because it is based mostly on observation. There may be more subnets allocated to various organizations than is publicly known.

Total estimated Internet routable IPs allocated through Monroe County: 979,712 (about 5 IPs for each person or 0.0293% of the Internet's allocated IPv4 address space)

Short explanation of CIDR notation

These lists use CIDR notation to specify how large the IP block is. The number after the / in the block name is the bitmask number which shows the size of the block. You can figure out how many IPs are in the block with this equation. 

232-n

where n is the cidr bitmask number. The block 149.159.0.0/16 has 232-16 IP addresses in it or 65,536. The most common block size is a /24, also called a class C subnet. It has 256 IP addresses in it. You can also see how many class C subnets are in a larger block by subtracking the block size from 24 instead of 32. So a /18 block has 224-18 or 64 class C subnets in it.

Certified I.T.

Total IPs: 256

  • 65.172.40.0/24 (not sure because they haven't been swipped in the ARIN database)

HoosierNet, Inc.

Total IPs: 16,384

These are now allocated through Egix/Kiva.

  • 206.106.64.0/18

Indiana University

Total IPs: 851,968

  • 149.159.0.0/16
  • 129.79.0.0/16
  • 156.56.0.0/16
  • 134.68.0.0/16
  • 149.160.0.0/16
  • 149.161.0.0/16
  • 149.162.0.0/16
  • 149.163.0.0/16
  • 149.164.0.0/16
  • 149.165.0.0/16
  • 149.166.0.0/16
  • 140.182.0.0/16
  • 192.239.0.0/16

This list covers the Bloomington campus as well as the IUPUI and regional campuses. IU also maintains several 10.0.0.0/8 subnets that are non-routable beyond the IU border routers.

Insight

Total IPs: 5,888

IPs on the following class C networks have been seen from Bloomington customers.

  • 12.205.33.0/24
  • 12.205.35.0/24
  • 12.205.37.0/24
  • 12.205.39.0/24
  • 12.205.44.0/24
  • 12.205.46.0/24
  • 12.208.43.0/24
  • 12.210.97.0/24
  • 12.210.99.0/24
  • 12.210.100.0/24
  • 12.210.106.0/24
  • 12.210.110.0/24
  • 12.210.112.0/24
  • 12.210.114.0/24
  • 12.210.117.0/24
  • 12.210.208.0/24
  • 74.128.168.0/24
  • 74.128.174.0/24
  • 74.129.225.0/24
  • 74.130.0.0/24
  • 74.130.2.0/24
  • 74.130.9.0/24
  • 74.130.27.0/24

Kiva Networking (now Egix)

Total IPs: 24,576

  • 216.9.128.0/19
  • 64.151.128.0/18

Old Blocks no longer used

  • 206.97.64.0/?? (This probably was a /20 or /19 size subnet)

AT&T / SBC / Ameritech

Total IPs: 62,720

  • 64.108.32.0/24
  • 64.108.33.0/24
  • 64.108.34.0/24
  • 66.72.38.0/24
  • 66.72.39.0/24
  • 66.72.64.0/24
  • 66.72.65.0/24
  • 67.38.128.0/24
  • 67.38.129.0/24
  • 68.22.241.0/24
  • 68.22.242.0/24
  • 68.22.243.0/24
  • 68.72.58.0/24
  • 68.72.59.0/24
  • 68.76.210.0/24
  • 68.76.211.0/24
  • 68.76.216.0/24
  • 68.76.217.0/24
  • 68.76.218.0/24
  • 68.76.219.0/24
  • 68.76.220.0/24
  • 68.76.221.0/24
  • 68.76.222.0/24
  • 68.76.223.0/24
  • 68.251.144.0/24
  • 68.251.145.0/24
  • 68.251.146.0/24
  • 68.251.147.0/24
  • 68.251.148.0/24
  • 68.251.149.0/24
  • 68.251.150.0/24
  • 68.251.151.0/24
  • 68.251.240.0/24
  • 68.251.241.0/24
  • 68.251.242.0/24
  • 68.251.243.0/24
  • 68.251.244.0/24
  • 68.251.245.0/24
  • 68.251.246.0/24
  • 68.251.247.0/24
  • 68.251.248.0/24
  • 68.251.249.0/24
  • 68.251.250.0/24
  • 68.251.251.0/24
  • 68.251.252.0/24
  • 68.251.253.0/24
  • 68.254.36.0/24
  • 68.254.37.0/24
  • 68.254.38.0/24
  • 68.254.39.0/24
  • 68.254.40.0/24
  • 68.254.41.0/24
  • 68.254.42.0/24
  • 68.254.43.0/24
  • 68.254.80.0/24
  • 68.254.81.0/24
  • 68.254.82.0/24
  • 68.254.83.0/24
  • 68.254.84.0/24
  • 68.254.85.0/24
  • 68.254.86.0/24
  • 68.254.87.0/24
  • 68.254.89.0/24
  • 68.254.90.0/24
  • 68.254.91.0/24
  • 68.254.92.0/24
  • 68.254.93.0/24
  • 68.254.94.0/24
  • 68.254.95.0/24
  • 69.218.168.0/24
  • 69.218.169.0/24
  • 69.222.16.0/24
  • 69.222.17.0/24
  • 69.222.18.0/24
  • 69.222.19.0/24
  • 70.133.104.0/24
  • 70.133.105.0/24
  • 70.225.208.0/24
  • 70.225.209.0/24
  • 70.225.210.0/24
  • 70.225.211.0/24
  • 70.231.124.0/24
  • 70.231.125.0/24
  • 70.231.126.0/24
  • 70.231.127.0/24
  • 70.239.64.0/24
  • 70.239.65.0/24
  • 70.239.66.0/24
  • 70.239.67.0/24
  • 70.239.68.0/24
  • 70.239.69.0/24
  • 70.239.70.0/24
  • 70.239.71.0/24
  • 70.239.72.0/24
  • 70.239.73.0/24
  • 70.239.74.0/24
  • 70.239.75.0/24
  • 70.239.76.0/24
  • 70.239.77.0/24
  • 70.239.78.0/24
  • 70.239.79.0/24
  • 70.239.80.0/24
  • 70.239.81.0/24
  • 70.239.82.0/24
  • 70.239.83.0/24
  • 70.239.84.0/24
  • 70.239.85.0/24
  • 70.239.86.0/24
  • 70.239.87.0/24
  • 70.239.88.0/24
  • 70.239.89.0/24
  • 70.239.90.0/24
  • 70.239.91.0/24
  • 70.239.92.0/24
  • 70.239.93.0/24
  • 70.239.94.0/24
  • 70.239.95.0/24
  • 75.19.176.0/24
  • 75.19.177.0/24
  • 75.19.178.0/24
  • 75.19.179.0/24
  • 75.19.180.0/24
  • 75.19.181.0/24
  • 75.19.182.0/24
  • 75.19.183.0/24
  • 75.19.184.0/24
  • 75.19.185.0/24
  • 75.19.186.0/24
  • 75.19.187.0/24
  • 75.19.188.0/24
  • 75.19.189.0/24
  • 75.19.190.0/24
  • 75.19.191.0/24
  • 75.60.168.0/24
  • 75.60.169.0/24
  • 75.60.170.0/24
  • 75.60.171.0/24
  • 75.60.172.0/24
  • 75.60.173.0/24
  • 75.60.174.0/24
  • 75.60.175.0/24
  • 75.62.112.0/24
  • 75.62.113.0/24
  • 75.62.114.0/24
  • 75.62.115.0/24
  • 75.62.116.0/24
  • 75.62.117.0/24
  • 75.62.118.0/24
  • 75.62.119.0/24
  • 76.248.64.0/24
  • 76.248.65.0/24
  • 76.248.66.0/24
  • 76.248.67.0/24
  • 76.248.68.0/24
  • 76.248.69.0/24
  • 76.248.70.0/24
  • 76.248.71.0/24
  • 76.251.80.0/24
  • 76.251.81.0/24
  • 76.251.82.0/24
  • 76.251.83.0/24
  • 76.251.84.0/24
  • 76.251.85.0/24
  • 76.251.86.0/24
  • 76.251.87.0/24
  • 76.252.188.0/24
  • 76.252.189.0/24
  • 76.252.190.0/24
  • 76.252.191.0/24
  • 99.14.208.0/24
  • 99.14.209.0/24
  • 99.14.210.0/24
  • 99.14.211.0/24
  • 99.31.8.0/24
  • 99.31.9.0/24
  • 99.31.10.0/24
  • 99.31.11.0/24
  • 99.31.12.0/24
  • 99.31.13.0/24
  • 99.31.14.0/24
  • 99.31.15.0/24
  • 99.50.224.0/24
  • 99.50.225.0/24
  • 99.50.226.0/24
  • 99.50.227.0/24
  • 99.50.228.0/24
  • 99.50.229.0/24
  • 99.50.230.0/24
  • 99.50.231.0/24
  • 99.57.2.0/24
  • 99.57.3.0/24
  • 99.57.4.0/24
  • 99.57.5.0/24
  • 99.57.6.0/24
  • 99.57.7.0/24
  • 99.75.48.0/24
  • 99.75.49.0/24
  • 99.75.50.0/24
  • 99.75.51.0/24
  • 99.75.52.0/24
  • 99.75.53.0/24
  • 99.75.54.0/24
  • 99.75.55.0/24
  • 99.102.184.0/24
  • 99.102.185.0/24
  • 99.102.186.0/24
  • 99.102.187.0/24
  • 99.133.184.0/24
  • 99.133.185.0/24
  • 99.133.186.0/24
  • 99.133.187.0/24
  • 99.133.188.0/24
  • 99.133.189.0/24
  • 99.133.190.0/24
  • 99.133.191.0/24
  • 99.137.200.0/24
  • 99.137.201.0/24
  • 99.137.202.0/24
  • 99.137.203.0/24
  • 99.137.204.0/24
  • 99.137.205.0/24
  • 99.137.206.0/24
  • 99.137.207.0/24
  • 99.146.136.0/24
  • 99.146.137.0/24
  • 99.146.138.0/24
  • 99.146.139.0/24
  • 99.146.140.0/24
  • 99.146.141.0/24
  • 99.146.142.0/24
  • 99.146.143.0/24
  • 99.169.102.0/24
  • 99.169.103.0/24
  • 99.169.96.0/24
  • 99.169.97.0/24
  • 99.169.98.0/24
  • 99.169.99.0/24
  • 99.186.232.0/24
  • 99.186.233.0/24
  • 99.186.234.0/24
  • 99.186.235.0/24
  • 99.186.236.0/24
  • 99.186.237.0/24
  • 99.186.238.0/24
  • 99.186.239.0/24


Smithville Digital / Smithville Telephone / Bluemarble

Total IPs: 16,640

  • 204.89.253.0/24
  • 66.244.64.0/18

Suso

Total IPs: 1,280

  • 66.244.94.0/23

Other blocks hosted with Suso

  • 199.26.178.0/24
  • 199.26.179.0/24
  • 199.26.180.0/24


External links

Retrieved from "http://www.bloomingpedia.org/w/index.php?title=Internet_IP_Subnets&oldid=27517"