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ASN Lookup Tool
AS43542 OptoNet-AS

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ASN Extended Info API & BGP Active Prefixes API
ASN Details
ASN
AS43542
Organisation
OptoNet Communication, spol. s.r.o.
Name
OptoNet-AS
Total IPv4 Addresses
8925
Total IPv4 Prefixes
6
Total IPv6 Prefixes
1
Total IPv4 Bogon Prefixes
0
Total IPv6 Bogon Prefixes
0
IPv4 Space Rank
#10,152 out of 77,301
Registry
Ripe
Registered Country
CZ flag CZ
Registered Country Name
Czechia
Registered Date
2007-08-20
Registration Last Change
2022-06-27
Receiving From

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

ASN
Organisation
AS174
US flagCogent Communications
AS16019
CZ flagVodafone Czech Republic a.s.
AS6939
US flagHurricane Electric LLC
AS49544
NL flagi3D.net B.V
AS36236
US flagNetActuate, Inc
Showing 5 of 9
Transit To

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

 

ASN
Organisation
AS207945
CZ flagCNI Group s.r.o.
AS57288
CZ flagStaMPi, spol. s r.o.
AS48091
CZ flagKraj Vysocina
AS202979
CZ flagNGA Services, spol. s r.o.
AS44104
CZ flagLCJ Invest, a.s.
IPv4 Active Prefixes

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

Prefix78.156.128.0/21
Range From78.156.128.0
Range To78.156.135.255
Prefix78.156.136.0/22
Range From78.156.136.0
Range To78.156.139.255
Prefix78.156.141.0/24
Range From78.156.141.0
Range To78.156.141.255
Prefix78.156.142.0/23
Range From78.156.142.0
Range To78.156.143.255
Prefix78.156.144.0/20
Range From78.156.144.0
Range To78.156.159.255
Showing 5 of 6
IPv6 Active Prefixes
Prefix2a00:d940::/32
Range From2a00:d940::
Range To2a00:d940:ffff:ffff:ffff:ffff:ffff:ffff
Autonomous System (AS) is a network (or collection of networks) that are all managed and supervised by a single entity or organisation. This tool provides a comprehensive ownership and connectivity report for any given AS number.