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CERFnet

CERFnet uses 84,546 IPv4 addresses in 254 ranges, and 5 IPv6 ranges, by the registry records IP Company reads.

cerf.net·United States

84,546
IPv4 addresses
254
IPv4 ranges
5
IPv6 ranges
0
ASes it operates
4
countries

Who routes its space

The networks announcing its IPv4, by the addresses each announces.

  1. AS7018 AT&T Enterprises, LLC82,451 · 97.52%
  2. AS2386 AT&T Enterprises, LLC256 · 0.30%
  3. AS13788 US Courts256 · 0.30%
  4. AS17088 Currenex, Inc.256 · 0.30%
  5. AS40631 Mastec, Inc256 · 0.30%
  6. AS701 Verizon Business47 · 0.06%

Where its space is

Its IPv4 that IP Geolocation places, by country. A /24 counts for the company using most of it.

  1. United States90,319 · 99.95%
  2. Germany40 · 0.04%
  3. France8 · 0.01%
  4. Canada1 · 0.00%

Networks it operates

The autonomous systems registered under its domain, by the IPv4 each announces anywhere.

No AS number is registered under its domain.

What the databases see

Addresses each address-keyed database holds in its IPv4, as a share of it, with the largest providers. A /24 counts for the company using most of it; counts overlap.

Speed tests

Speeds measured from its space in the last 90 days.

From M-Lab
54.3 Mbps
median download
20.6 Mbps
median upload
42
download tests
42
upload tests

Its address ranges

Its largest IPv4 ranges, then its IPv6 ones, as IP Company draws them, a CIDR a row, with the network announcing each.

first 100 of 259 ranges
RANGEIPV4ORIGIN
209.187.176.0/204,096AS7018
209.187.192.0/212,048AS7018
12.130.161.140-12.130.177.2554,212AS7018
12.129.49.0-12.129.64.1914,032AS7018
12.130.91.192-12.130.105.2553,648AS7018
12.129.38.0/23512AS7018
12.129.40.0/212,048AS7018
12.130.107.0-12.130.114.2552,048AS7018
209.187.120.0/212,048AS7018
209.187.144.0/212,048AS7018
209.187.8.0/212,048AS7018
12.129.232.0/221,024AS7018
12.129.236.0/23512AS7018
12.129.30.192/2664AS7018
12.129.31.0/24256AS7018
12.129.32.0/221,024AS7018
12.129.211.0/24256AS7018
12.129.212.0/221,024AS7018
12.130.86.0/23512AS7018
12.130.88.0/23512AS7018
12.130.90.0/24256AS7018
12.130.33.80-12.130.37.2551,200AS7018
12.130.54.224-12.130.59.311,088AS7018
12.130.184.0/221,024AS7018
12.130.69.0-12.130.72.183952AS7018
12.129.240.128-12.129.244.31928AS7018
12.130.0.0-12.130.3.111880AS7018
12.129.204.0-12.129.207.39808AS7018
12.129.192.0/23512AS7018
12.129.194.0/24256AS7018
12.129.224.0/23512AS7018
12.129.226.0/24256AS7018
12.130.128.0/23512AS7018
12.130.130.0/24256AS7018
12.130.189.0/24256AS7018
12.130.190.0/23512AS7018
12.130.47.0/24256AS7018
12.130.48.0/23512AS7018
192.215.11.0/24256AS7018
192.215.12.0/23512AS7018
12.129.200.80-12.129.203.47736AS7018
12.129.12.64-12.129.15.15720AS7018
12.129.91.96/2732AS7018
12.129.91.128/25128AS7018
12.129.92.0/23512AS7018
12.130.159.0-12.130.161.138651AS7018
12.129.115.128/25128AS7018
12.129.116.0/23512AS7018
12.129.7.128-12.129.9.231616AS7018
12.129.0.0/23512AS7018
12.129.2.0/2664AS7018
12.129.2.64/2732AS7018
12.129.95.172-12.129.97.255596AS7018
12.129.64.224-12.129.67.47592AS7018
12.129.251.192/2664AS7018
12.129.252.0/23512AS7018
12.129.28.64-12.129.30.127576AS7018
12.129.104.24-12.129.106.71560AS7018
12.129.219.224/2732AS7018
12.129.220.0/23512AS7018
12.130.142.0/23512AS7018
12.130.144.0/2732AS7018
12.130.155.0/24256AS7018
12.130.156.0/24256AS7018
12.130.157.0/2732AS7018
12.129.102.0/23512AS7018
12.129.104.0/2816AS7018
12.129.228.0/23512AS7018
12.129.230.0/298AS7018
12.129.244.248/298AS7018
12.129.245.0/24256AS7018
12.129.246.0/24256AS7018
12.129.119.0/24256AS7018
12.129.120.0/24256AS7018
12.129.21.0/24256AS7018
12.129.22.0/24256AS7018
12.130.120.0/23512AS7018
12.130.62.0/23512AS7018
192.215.15.0/24256AS7018
192.215.16.0/24256AS7018
192.215.30.0/23512AS7018
192.215.34.0/23512AS7018
199.106.62.0/23512AS7018
207.252.4.0/23512AS7018
12.129.69.56-12.129.71.47504AS7018
12.129.2.104-12.129.4.55464AS7018
12.130.6.120-12.130.8.63456AS7018
12.129.74.72-12.129.75.255440AS7018
12.129.110.160-12.129.112.71424AS7018
12.130.3.128/25128AS7018
12.130.4.0/24256AS7018
12.130.5.0/2732AS7018
12.130.41.248/298AS7018
12.130.42.0/24256AS7018
12.130.43.0/25128AS7018
12.129.125.128-12.129.126.227356AS7018
12.129.10.0/24256AS7018
12.129.11.0/2664AS7018
12.129.11.64/2732AS7018
12.130.53.0/24256AS7018
12.130.54.0/2664AS7018
12.130.54.64/2732AS7018
12.130.10.112-12.130.11.191336AS7018
12.129.217.192/2664AS7018
12.129.218.0/24256AS7018
12.129.73.0/24256AS7018
12.129.74.0/2664AS7018
12.130.5.64-12.130.6.111304AS7018
12.129.207.216/298AS7018
12.129.207.224/2732AS7018
12.129.208.0/24256AS7018
12.129.83.224/2732AS7018
12.129.84.0/24256AS7018
12.130.30.16-12.130.31.31272AS7018
12.130.59.240/2816AS7018
12.130.60.0/24256AS7018
12.129.18.0/24256AS7018
12.129.27.0/24256AS7018
12.129.80.0/24256AS7018
12.129.82.0/24256AS40631
12.129.89.0/24256AS2386
12.130.12.0/24256AS7018
12.130.13.0/24256AS17088
12.130.145.0/24256AS7018
12.130.40.0/24256AS7018
12.130.72.192/2664AS7018
12.130.73.0/25128AS7018
12.130.73.128/2664AS7018
12.130.77.0/24256AS13788
192.112.248.0/24256
192.153.94.0/24256
192.215.18.0/24256AS7018
192.215.23.0/24256AS7018
192.215.26.0/24256AS7018
192.215.28.0/24256AS7018
198.133.190.0/24256
198.49.158.0/24256
199.106.128.0/24256AS7018
206.19.8.0/24256AS7018
207.252.11.0/24256AS7018
207.252.18.0/24256AS7018
12.129.196.232-12.129.197.215240AS7018
12.129.76.48-12.129.77.31240AS7018
12.129.68.32-12.129.69.7232AS7018
12.129.101.0/25128AS7018
12.129.101.128/2664AS7018
12.129.101.192/2732AS7018
12.130.9.64/2664AS7018
12.130.9.128/25128AS7018
12.130.10.0/2732AS7018
12.129.67.64-12.129.68.23216AS7018

Names it registers under

The holder names its registry records give, by the IPv4 under each.

  1. CERFnet81,427 · 96.31%
  2. CERFnet WWW/GVS Dayton NJ512 · 0.61%
  3. CERFnet customer - Digigami512 · 0.61%
  4. CERFNET256 · 0.30%
  5. CERFnet Dayton Chorus/Co-Lo Subnet256 · 0.30%
  6. CERFnet San Diego ISDN256 · 0.30%
  7. CERFnet customer - Fidelity Investments256 · 0.30%
  8. Kasiser Foundation Medical Plan Inc.256 · 0.30%
  9. Logicon Ultrasystems Inc.256 · 0.30%
  10. THINQUE Systems256 · 0.30%
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01 · License

Then license what you use.

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