Skip to content
InternetData
Log inSign up
HomeCompaniesCESNET z.s.p.o.
ISP

CESNET z.s.p.o.

CESNET z.s.p.o. uses 29,850 IPv4 addresses in 237 ranges, and 133 IPv6 ranges, by the registry records IP Company reads.

cesnet.cz·Czechia

29,850
IPv4 addresses
237
IPv4 ranges
133
IPv6 ranges
2
ASes it operates
1
country

About the company

Who it is, where it is registered and who owns it.

Description
Czech organization
Founded
1996
Headquarters
Prague, Czechia
Employees
194
Legal name
CESNET, zájmové sdružení právnických osob
LEI
315700BATEFCY0YBW762
Registered
Czechia, no. 63839172

Who routes its space

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

  1. AS2852 CESNET z.s.p.o.26,606 · 89.13%
  2. AS13036 T-Mobile Czech Republic a.s.3,240 · 10.85%
  3. AS25512 CD-Telematika a.s.4 · 0.01%

Where its space is

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

  1. Czechia34,816 · 100.00%

Networks it operates

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

ASNNAMETYPEREGISTEREDIPV4
AS2852CESNET z.s.p.o.EducationCzechia849,920
AS2605CESNET z.s.p.o.EducationCzechia0

How its networks peer

Each network's peering policy, traffic, ratio and reach as its operator states them, with the internet exchanges and facilities it is at.

ASNPOLICYTRAFFICRATIOSCOPEEXCHANGESFACILITIES
AS2852Selective500-1000GbpsBalancedEurope30

Internet exchanges

The internet exchanges its networks connect at, by the capacity of their ports there: 3 exchanges, 4 ports and 450 Gbps in all.

EXCHANGEWHEREPORTSCAPACITY
NIX.CZPrague, Czechia2400 Gbps
DE-CIX FrankfurtFrankfurt, Germany130 Gbps
AMS-IXAmsterdam, The Netherlands120 Gbps

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
15.0 Mbps
median download
15.1 Mbps
median upload
95
download tests
77
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 370 ranges
RANGEIPV4ORIGIN
78.128.234.0-78.128.246.683,141AS2852
78.128.249.152-78.128.255.2551,640AS2852
195.113.251.0/24256AS2852
195.113.252.0/221,024AS2852
193.84.80.0/221,024AS2852
78.128.228.0/221,024AS2852
185.8.161.0/24256AS2852
185.8.162.0/23512AS2852
78.128.225.152-78.128.227.255616AS2852
195.113.156.0/23512AS2852
78.128.232.0/23512AS2852
78.128.247.203-78.128.249.150460AS2852
195.113.160.0/24256AS2852
195.113.161.0/25128AS2852
195.113.161.128/2732AS2852
78.128.224.0-78.128.225.151408AS2852
78.128.218.112/2816AS2852
78.128.218.128/25128AS2852
78.128.219.0/24256AS2852
78.128.211.0/24256AS2852
78.128.212.0/25128AS2852
78.128.246.137-78.128.247.201321AS2852
195.113.227.236/304AS2852
195.113.227.240/2816AS2852
195.113.228.0/24256AS2852
195.113.178.252/304AS2852
195.113.179.0/24256AS2852
185.8.160.0/24256AS2852
194.212.172.0/24256AS13036
194.212.176.192/2664AS13036
194.212.177.0/25128AS13036
194.212.177.128/2664AS13036
194.212.45.0/24256AS13036
195.113.144.0/24256AS2852
195.113.150.0/24256AS2852
195.113.167.0/24256AS2852
195.113.169.0/24256AS2852
195.113.196.0/24256AS2852
195.113.208.0/24256AS2852
195.113.214.0/24256AS2852
195.113.235.0/24256AS2852
195.113.238.0/24256AS2852
195.113.71.0/24256AS2852
195.113.78.0/24256AS2852
195.178.64.0/24256AS2852
195.178.83.0/24256AS2852
78.128.216.0/24256AS2852
78.128.222.0/24256AS2852
195.113.210.16-195.113.210.255240AS2852
78.128.221.20-78.128.221.255236AS2852
195.113.219.168-195.113.220.143232AS2852
195.113.224.80-195.113.225.55232AS2852
195.113.101.0/25128AS2852
195.113.101.128/2664AS2852
195.113.101.192/298AS2852
194.212.203.64/2664AS13036
194.212.203.128/25128AS13036
195.113.222.64/2664AS2852
195.113.222.128/25128AS2852
195.113.225.64/2664AS2852
195.113.225.128/25128AS2852
195.113.231.128/25128AS2852
195.113.232.0/2664AS2852
195.113.171.208/2816AS2852
195.113.171.224/2732AS2852
195.113.172.0/25128AS2852
78.128.220.96/2732AS2852
78.128.220.128/25128AS2852
195.113.209.64/2664AS2852
195.113.209.128/2664AS2852
195.113.209.192/2816AS2852
195.113.186.214-195.113.187.87130AS2852
194.212.131.0/25128AS13036
194.212.143.128/25128AS13036
194.212.186.0/25128AS13036
194.212.190.0/25128AS13036
194.212.199.0/25128AS13036
194.212.201.128/25128AS13036
194.212.206.0/25128AS13036
194.212.216.0/25128AS13036
195.113.112.128/25128AS2852
195.113.134.128/25128AS2852
195.113.147.0/25128AS2852
195.113.163.0/25128AS2852
195.113.172.128/25128AS2852
195.113.173.128/25128AS2852
195.113.176.0/25128AS2852
195.113.186.0/25128AS2852
195.113.191.128/25128AS2852
195.113.193.0/25128AS2852
195.113.205.0/25128AS2852
195.113.205.128/25128AS2852
195.113.219.0/25128AS2852
195.113.232.128/25128AS2852
195.113.248.128/25128AS2852
195.113.83.128/25128AS2852
195.113.84.128/25128AS2852
195.113.95.128/25128AS2852
195.178.65.0/25128AS2852
195.178.81.0/25128AS2852
78.128.209.128/25128AS2852
78.128.210.0/25128AS2852
78.128.210.128/25128AS2852
78.128.212.128/25128AS2852
78.128.217.0/25128AS2852
78.128.217.224-78.128.218.91124AS2852
195.113.151.144/2816AS2852
195.113.151.160/2732AS2852
195.113.151.192/2664AS2852
195.113.177.144/2816AS2852
195.113.177.160/2732AS2852
195.113.177.192/2664AS2852
195.113.188.0/2664AS2852
195.113.188.64/2732AS2852
195.113.188.96/2816AS2852
195.113.153.112-195.113.153.221110AS2852
195.113.163.148-195.113.163.255108AS2852
194.212.222.0/2664AS13036
194.212.222.64/2732AS13036
194.212.44.0/2664AS13036
194.212.44.64/2732AS13036
195.178.65.160/2732AS2852
195.178.65.192/2664AS2852
194.212.221.0/2664AS13036
194.212.221.64/2816AS13036
194.212.221.96/2732AS13036
194.212.221.128/2732AS13036
194.212.221.160/2816AS13036
195.113.249.176/2816AS2852
195.113.249.192/2664AS2852
195.113.86.64/2664AS2852
195.113.86.128/2816AS2852
195.113.176.186/312AS2852
195.113.176.188/304AS2852
195.113.176.192/2664AS2852
78.128.246.70-78.128.246.13566AS2852
194.108.69.192/2664AS13036
194.108.76.192/2664AS13036
194.212.12.192/2664AS13036

Names it registers under

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

  1. CESNET z.s.p.o.29,038 · 97.28%
  2. CESNET, z.s.p.o.768 · 2.57%
  3. CESNET PASNET hSOC Backbone40 · 0.13%
  4. Cesnet4 · 0.01%
  5. CESNET - PASNET Zikova hSOC0 · 0.00%
  6. CESNET DCT - PASNET OVT hSOC0 · 0.00%
  7. CESNET PASNET LB hSOC0 · 0.00%
00 · Evaluate

Test the real build first.

An evaluation license puts a full current build in your hands, with no sampling, so you can measure it against your own traffic before anyone talks about terms.

Request evaluationDownload sample
01 · License

Then license what you use.

Standard, for detection and decisions inside your own product and operations.
Redistribution, when the data ships onward inside what you sell, priced by scope rather than by seat.
Annual terms, a named contact, and monthly, quarterly or yearly payment.
Get a quoteCompare licenses