ASN Lookup Tool
AS21756 Private Use AS

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ASN Extended Info API & BGP Active Prefixes API
ASN Details
ASN
AS21756
Organisation
SIDERCA S.A.I.C.
Name
Private Use AS
Total IPv4 Addresses
1280
Total IPv4 Prefixes
5
Total IPv6 Prefixes
0
Total IPv4 Bogon Prefixes
0
Total IPv6 Bogon Prefixes
0
IPv4 Space Rank
#29,328 out of 76,964
Registry
Lacnic
Registered Country
AR flag AR
Registered Country Name
Argentina
Registered Date
2001-06-15
Registration Last Change
2021-12-15
Receiving From

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

ASN
Organisation
US flagLevel 3 Parent, LLC
AR flagTechtel LMDS Comunicaciones Interactivas S.A.
IPv4 Active Prefixes

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

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.