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ASN Lookup Tool
AS51257 CERIZ

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ASN Extended Info API & BGP Active Prefixes API
ASN Details
ASN
AS51257
Organisation
CERIZ SASU
Name
CERIZ
Total IPv4 Addresses
256
Total IPv4 Prefixes
1
Total IPv6 Prefixes
20
Total IPv4 Bogon Prefixes
0
Total IPv6 Bogon Prefixes
0
IPv4 Space Rank
#68,163 out of 77,386
Registry
Ripe
Registered Country
FR flag FR
Registered Country Name
France
Registered Date
2016-01-05
Registration Last Change
2024-01-27
Receiving From

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

ASN
Organisation
AS29075
FR flagIELO-LIAZO SERVICES SAS
IPv4 Active Prefixes

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

Prefix171.22.146.0/24
Range From171.22.146.0
Range To171.22.146.255
IPv6 Active Prefixes
Prefix2a05:d80::/34
Range From2a05:d80::
Range To2a05:d80:3fff:ffff:ffff:ffff:ffff:ffff
Prefix2a05:d80:4000::/48
Range From2a05:d80:4000::
Range To2a05:d80:4000:ffff:ffff:ffff:ffff:ffff
Prefix2a05:d80:4001::/48
Range From2a05:d80:4001::
Range To2a05:d80:4001:ffff:ffff:ffff:ffff:ffff
Prefix2a05:d80:4002::/47
Range From2a05:d80:4002::
Range To2a05:d80:4003:ffff:ffff:ffff:ffff:ffff
Prefix2a05:d80:4004::/46
Range From2a05:d80:4004::
Range To2a05:d80:4007:ffff:ffff:ffff:ffff:ffff
Showing 5 of 20
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.