Report for 30573

Name

OLDSECONDBANCORP - Old Second Bancorp, ZZ

AS Adjacency Report

In the context of this report "Upstream" indicates that there is an adjacent AS that lines between the BGP table collection point (in this case at AS2.0) and the specified AS. Similarly, "Downstream" refers to an adjacent AS that lies beyond the specified AS. This upstream / downstream categorisation is strictly a description relative topology, and should not be confused with provider / customer / peer inter-AS relationships.

30573 OLDSECONDBANCORP - Old Second Bancorp, ZZ

  Adjacency:     1  Upstream:     1  Downstream:     0
  Upstream Adjacent AS list
    AS33491         COMCAST-33491 - Comcast Cable Communications, LLC, US

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
60764 AS30573        ORIGIN  Originate:        256 /24.00  Transit:          0 /0.00  OLDSECONDBANCORP - Old Second Bancorp, ZZ

Aggregation Suggestions

        Filter: Aggregates, Specifics

This report does not take into account conditions local to each origin AS in terms of policy or traffic engineering requirements, so this is an approximate guideline as to aggregation possibilities.

 Rank AS            AS Name                                      Current  Wthdw  Aggte  Annce Redctn       %
38441 AS30573       OLDSECONDBANCORP - Old Second Bancorp, ZZ          1      0      0      1      0   0.00%


  Prefix               AS Path                              Aggregation Suggestion
  12.48.114.0/24       4777 2516 7922 33491 30573   

Advertisements that are fragments of the original RIR allocation (more specifics) originated by this AS.

AS30573   1 More Specifics   1 Total Advertisements   OLDSECONDBANCORP - Old Second Bancorp, ZZ
    12.48.114.0/24                12.0.0.0/8

Whois Entry

whois: 402332

IANA has recorded AS30573 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS30573\n             
             #
             # ARIN WHOIS data and services are subject to the Terms of Use
             # available at: https://www.arin.net/resources/registry/whois/tou/
             #
             # If you see inaccuracies in the results, please report at
             # https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
             #
             # Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
             #
             
             
             No match found for -Vjw1.0,2401:2000:6660::13 30573.
             
             
             #
             # ARIN WHOIS data and services are subject to the Terms of Use
             # available at: https://www.arin.net/resources/registry/whois/tou/
             #
             # If you see inaccuracies in the results, please report at
             # https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
             #
             # Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
             #