AS2852 · 
CZ — CESNET2 CESNET z.s.p.o.
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CESNET2 CESNET z.s.p.o. · · CZ
Selected local snapshot coverage; not the whole Internet. BGP snapshots: ris-rrc00 10 Oct 16:00 UTC; routeviews2 10 Oct 22:00 UTC; routeviews6 10 Oct 22:00 UTC. Validator: 10 Oct 23:15 UTC. Publication-point issues: 88
Address space details
Overlapping originated prefixes counted once. IPv4 addresses: 849,920
IPv6 addresses: 633825300114114700748351602688
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Observed originated prefixes
These are observed BGP origins, not an inventory of registered allocations or transit reachability.
27 matching prefix–origin pairs. Each pair appears once; source observations are in Details.
| Prefix | RPKI | Last observed | Details |
|---|---|---|---|
Valid | 10 Oct 22:00 UTC | 2 source observations
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Valid | 10 Oct 22:00 UTC | 2 source observations
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Valid | 10 Oct 22:00 UTC | 2 source observations
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Valid | 10 Oct 22:00 UTC | 2 source observations
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Valid | 10 Oct 22:00 UTC | 2 source observations
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Valid | 10 Oct 22:00 UTC | 2 source observations
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Valid | 10 Oct 22:00 UTC | 2 source observations
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Valid | 10 Oct 22:00 UTC | 2 source observations
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Valid | 10 Oct 22:00 UTC | 2 source observations
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Valid | 10 Oct 22:00 UTC | 2 source observations
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Valid | 10 Oct 22:00 UTC | 2 source observations
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Valid | 10 Oct 22:00 UTC | 2 source observations
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Valid | 10 Oct 22:00 UTC | 2 source observations
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Valid | 10 Oct 22:00 UTC | 2 source observations
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Valid | 10 Oct 22:00 UTC | 2 source observations
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Valid | 10 Oct 22:00 UTC | 2 source observations
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Valid | 10 Oct 22:00 UTC | 2 source observations
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Valid | 10 Oct 22:00 UTC | 2 source observations
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Valid | 10 Oct 22:00 UTC | 2 source observations
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Valid | 10 Oct 22:00 UTC | 2 source observations
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Valid | 10 Oct 22:00 UTC | 2 source observations
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Valid | 10 Oct 22:00 UTC | 2 source observations
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Valid | 10 Oct 22:00 UTC | 2 source observations
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Valid | 10 Oct 22:00 UTC | 2 source observations
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Valid | 10 Oct 22:00 UTC | 2 source observations
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Observed AS neighbors
20 unique neighbors in the selected local snapshots. This is the available collector dataset, not a complete map of the Internet. Adjacency does not establish upstream service or peering.
20 matching neighbors · 1–20 shown
| Network | IPv4/IPv6 | Seen in | Last observed | Details |
|---|---|---|---|---|
AS6939 ·  US Hurricane Electric LLC | IPv4, IPv6 | ris-rrc00, routeviews2, routeviews6 | 10 Oct 22:00 UTC | Source observations
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AS8218 ·  FR Zayo Infrastructure France SA | IPv4 | ris-rrc00 | 10 Oct 16:00 UTC | Source observations
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AS20766 · FR GITOYEN-MAIN-AS Association "Gitoyen" | IPv4 | ris-rrc00 | 10 Oct 16:00 UTC | Source observations
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AS34019 · FR HIVANE Hivane Association | IPv6 | ris-rrc00 | 10 Oct 16:00 UTC | Source observations
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AS48091 · CZ ROWANet-AS Kraj Vysocina | IPv4, IPv6 | ris-rrc00, routeviews2, routeviews6 | 10 Oct 22:00 UTC | Source observations
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AS51727 · CZ SKODAPOWER-AS Doosan Skoda Power s.r.o | IPv4 | ris-rrc00, routeviews2 | 10 Oct 22:00 UTC | Source observations
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AS61110 · CZ SITMP Sprava informacnich technologii mesta Plzne, p.o. | IPv4, IPv6 | ris-rrc00, routeviews2, routeviews6 | 10 Oct 22:00 UTC | Source observations
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AS197277 · CZ SUKL_AS State Institute for Drug Control | IPv4, IPv6 | ris-rrc00, routeviews2, routeviews6 | 10 Oct 22:00 UTC | Source observations
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AS197451 · CZ VUTBR-AS Brno University of Technology | IPv4, IPv6 | ris-rrc00, routeviews2, routeviews6 | 10 Oct 22:00 UTC | Source observations
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AS198500 · CZ MUNINET-AS Masarykova univerzita - Ustav vypocetni techniky | IPv6 | routeviews6 | 10 Oct 22:00 UTC | Source observations
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AS199711 · CZ NCISA-AS National Cyber and Information Security Agency | IPv4, IPv6 | ris-rrc00, routeviews2, routeviews6 | 10 Oct 22:00 UTC | Source observations
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AS200874 · CZ LBC-AS-CZ Liberecky kraj | IPv4, IPv6 | ris-rrc00, routeviews2, routeviews6 | 10 Oct 22:00 UTC | Source observations
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AS201648 · CZ PLZ-AS-CZ Plzensky kraj | IPv4, IPv6 | ris-rrc00, routeviews2, routeviews6 | 10 Oct 22:00 UTC | Source observations
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AS202874 · CZ ZL-AS-CZ Zlinsky Kraj | IPv4, IPv6 | ris-rrc00, routeviews2, routeviews6 | 10 Oct 22:00 UTC | Source observations
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AS204772 · CZ RSD-CZ Reditelstvi silnic a dalnic s.p. | IPv6 | ris-rrc00, routeviews6 | 10 Oct 22:00 UTC | Source observations
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AS208093 · CZ msk Moravskoslezsky kraj | IPv4 | ris-rrc00, routeviews2 | 10 Oct 22:00 UTC | Source observations
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AS210367 · CZ KZCR Krajska zdravotni, a.s. | IPv4, IPv6 | ris-rrc00, routeviews2, routeviews6 | 10 Oct 22:00 UTC | Source observations
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AS210498 · CZ Vysocina-hSOC Kraj Vysocina | IPv4, IPv6 | ris-rrc00, routeviews2, routeviews6 | 10 Oct 22:00 UTC | Source observations
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AS212876 · CZ CZ-PARDUBICKYKRAJ Pardubicky Kraj | IPv4, IPv6 | ris-rrc00, routeviews2, routeviews6 | 10 Oct 22:00 UTC | Source observations
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AS213152 · CZ NBU Narodni bezpecnostni urad Czech Republic | IPv4, IPv6 | ris-rrc00, routeviews2, routeviews6 | 10 Oct 22:00 UTC | Source observations
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View observed neighbor graph (up to 15 AS nodes)
Lines mean observed adjacency, with no commercial direction inferred. The table above provides the same evidence and source times.
Showing 14 of 20 matching neighbors, in table sort order, independent of table page.
Peering & locations
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Registry information
No cached registry response is available yet. Routing origins above are not a substitute for registry ownership.
Allocation statistics
NRO/RIR delegated-extended records describe allocation or assignment ranges. They do not prove a BGP announcement or replace more-specific RDAP registration information. Country is the allocation record’s registration country, not the physical location of every address.
- AS2852–AS2852 · ripencc · assigned · ASN allocation country: CZ · Allocation date: 1993-12-20 — NRO/RIR data · snapshot 10 Oct 00:00 UTC
Prefix count history
Local observation changes
Only comparable successful snapshots are compared. First imports, changed peer coverage and collection gaps are baselines, not new global routes or withdrawals. RPKI transition history is not available before it has been recorded.
No retained changes are available for this resource.
Retained local prefix-count observations
Separate collector series. Missing rows are not zero. Peer-set changes are separate coverage, not a continuous trend.
| Source | Snapshot | Family | Prefixes | Peer coverage |
|---|---|---|---|---|
routeviews2 | 10 Oct 22:00 UTC | IPv4 | 26 | 140.192.8.16/IPv4 |
routeviews6 | 10 Oct 22:00 UTC | IPv6 | 1 | 2406:840:feed:2::1/IPv6 |
routeviews2 | 10 Oct 20:00 UTC | IPv4 | 26 | 140.192.8.16/IPv4 |
routeviews6 | 10 Oct 20:00 UTC | IPv6 | 1 | 2406:840:feed:2::1/IPv6 |
ris-rrc00 | 10 Oct 16:00 UTC | IPv4 | 26 | 2a00:5884::6/IPv6, 89.234.186.6/IPv4 |
ris-rrc00 | 10 Oct 16:00 UTC | IPv6 | 1 | 2a00:5884::6/IPv6, 89.234.186.6/IPv4 |
ris-rrc00 | 10 Oct 08:00 UTC | IPv4 | 26 | 2a00:5884::6/IPv6, 89.234.186.6/IPv4 |
ris-rrc00 | 10 Oct 08:00 UTC | IPv6 | 1 | 2a00:5884::6/IPv6, 89.234.186.6/IPv4 |