Network operator
CESNET z.s.p.o.
2 networks combined into one view.
Operators are grouped by registered network name. Each figure below is the total across every network on this page, which is what a single network page cannot show.
What this tells you
- 22,350 of those are in Czechia, 0.2% of everyone online there.
Countries in this space
Space we can place in a country covers 100% of these networks' IPv4 space and 100% of their IPv6 space. The table below divides that space.
| Country | IPv4 share | IPv6 share | |
|---|---|---|---|
| Czechia | 100% | 100% |
Organisations holding assignments here
Registered organisations account for 75% of these networks' IPv4 space and 100% of their IPv6 space. The table below divides that space. Registered holders come from the bulk whois that RIPE, APNIC and AFRINIC publish. ARIN and LACNIC do not publish theirs, so space held in North and South America is largely unattributed here.
| Organisation | IPv4 share | IPv6 share | |
|---|---|---|---|
| Ceske vysoke uceni technicke v Praze | 10% | <0.1% | |
| Vysoka skola banska - Technicka univerzita Ostrava | 10% | <0.1% | |
| Univerzita obrany | 10% | - | |
| University of South Bohemia in Ceske Budejovice | 10% | <0.1% | |
| Zapadoceska univerzita v Plzni | 10% | <0.1% | |
| Technicka univerzita v Liberci | 10% | <0.1% | |
| Vysoka skola chemicko-technologicka v Praze | 10% | <0.1% | |
| Masarykova univerzita - Ustav vypocetni techniky | 10% | - | |
| Charles University | 5% | <0.1% | |
| CESNET z.s.p.o. | 4% | 100% | |
| Ministry of Education, Youth and Sports | 0.1% | <0.1% | |
| Everything else (295 more) | 8% | <0.1% |
Anonymizer signals
Flagged space covers <0.1% of these networks' IPv4 space. The table below divides that space.
| Category | IPv4 share | |
|---|---|---|
| Open proxy | 100% | |
| Datacenter | 100% |
One address can carry more than one of these, so the rows add up to more than the space they cover.
All 2 networks run by this operator
| ASN | Name | Estimated users |
|---|---|---|
| AS2852 | CESNET z.s.p.o. | 22,350 |
| AS2605 | CESNET z.s.p.o. | - |
Every figure on this page is also JSON: /api/v2/directory/isp/cesnet-z-s-p-o. Breakdowns paginate from there, so a table showing the largest rows here returns all of them. Read the API.