BigDataCloud Logo

ASN Lookup Tool
AS2852 CESNET2

Powered By:
ASN Extended Info API & BGP Active Prefixes API
ASN Details
ASN
AS2852
Organisation
CESNET z.s.p.o.
Name
CESNET2
Total IPv4 Addresses
849,920
Total IPv4 Prefixes
41
Total IPv6 Prefixes
4
Total IPv4 Bogon Prefixes
0
Total IPv6 Bogon Prefixes
0
IPv4 Space Rank
#411 out of 79,007
Registry
Ripe
Registered Country
CZ flag CZ
Registered Country Name
Czechia
Registered Date
2002-06-22
Registration Last Change
2025-07-25
Receiving From

The list of active Autonomous Systems (ASs) which send traffic to that ASN.

ASN
Organisation
AS56662
PL flagMarcin Gondek
AS2914
US flagNTT America, Inc.
AS4230
BR flagCLARO S.A.
AS7713
ID flagTelekomunikasi Indonesia (PT)
AS6057
UY flagAdministracion Nacional de Telecomunicaciones
Showing 5 of 71
Transit To

The list of active Autonomous Systems (ASs) which receive traffic from that ASN.

 

ASN
Organisation
AS2607
SK flagZdruzenie pouzivatelov Slovenskej akademickej da..
AS1853
AT flagACONET
AS197451
CZ flagBrno University of Technology
AS197277
CZ flagState Institute for Drug Control
AS201648
CZ flagPlzensky kraj
Showing 5 of 18
IPv4 Active Prefixes

This provides the list of IPv4 address space routes/prefixes currently announced on Border Gateway Protocol (BGP).

Prefix78.128.128.0/17
Range From78.128.128.0
Range To78.128.255.255
Prefix146.102.0.0/16
Range From146.102.0.0
Range To146.102.255.255
Prefix147.32.0.0/16
Range From147.32.0.0
Range To147.32.255.255
Prefix147.33.0.0/16
Range From147.33.0.0
Range To147.33.255.255
Prefix147.228.0.0/16
Range From147.228.0.0
Range To147.228.255.255
Showing 5 of 41
IPv6 Active Prefixes
Prefix2001:718::/32
Range From2001:718::
Range To2001:718:ffff:ffff:ffff:ffff:ffff:ffff
Prefix2001:719::/32
Range From2001:719::
Range To2001:719:ffff:ffff:ffff:ffff:ffff:ffff
Prefix2001:71a::/31
Range From2001:71a::
Range To2001:71b:ffff:ffff:ffff:ffff:ffff:ffff
Prefix2001:71c::/30
Range From2001:71c::
Range To2001:71f:ffff:ffff:ffff:ffff:ffff:ffff