Report for 18596

Name

MADISONTELCO - Madison Telephone Company, US

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.

18596 MADISONTELCO - Madison Telephone Company, US

  Adjacency:     2  Upstream:     2  Downstream:     0
  Upstream Adjacent AS list
    AS174           COGENT-174 - Cogent Communications, LLC, US
    AS6939          HURRICANE - Hurricane Electric LLC, US

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
7699  AS18596        ORIGIN  Originate:      16640 /17.98  Transit:          0 /0.00  MADISONTELCO - Madison Telephone Company, US

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       %
 8535 AS18596       MADISONTELCO - Madison Telephone Company, US       9      5      0      4      5  55.56%


  Prefix               AS Path                              Aggregation Suggestion
  66.242.192.0/19      4777 6939 18596        
  66.242.192.0/24      4777 6939 18596      - Withdrawn - matching aggregate 66.242.192.0/19 4777 6939 18596
  66.242.205.0/24      4777 6939 18596      - Withdrawn - matching aggregate 66.242.192.0/19 4777 6939 18596
  66.242.206.0/23      4777 6939 18596      - Withdrawn - matching aggregate 66.242.192.0/19 4777 6939 18596
  66.242.208.0/22      4777 6939 18596      - Withdrawn - matching aggregate 66.242.192.0/19 4777 6939 18596
  66.242.221.0/24      4777 2516 174 18596    
  76.77.224.0/20       4777 6939 18596        
  76.77.232.0/22       4777 6939 18596      - Withdrawn - matching aggregate 76.77.224.0/20 4777 6939 18596
  76.77.236.0/22       4777 2516 174 18596    

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

AS18596   7 More Specifics   9 Total Advertisements   MADISONTELCO - Madison Telephone Company, US
    66.242.192.0/24               66.242.192.0/19
    66.242.205.0/24               66.242.192.0/19
    66.242.206.0/23               66.242.192.0/19
    66.242.208.0/22               66.242.192.0/19
    66.242.221.0/24               66.242.192.0/19
    76.77.232.0/22                76.77.224.0/20
    76.77.236.0/22                76.77.224.0/20

Whois Entry

whois: 402332

IANA has recorded AS18596 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS18596\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.
             #
             
             
             ASNumber:       18596
             ASName:         MADISONTELCO
             ASHandle:       AS18596
             RegDate:        2000-09-18
             Updated:        2012-02-24
             Ref:            https://rdap.arin.net/registry/autnum/18596
             
             
             OrgName:        Madison Telephone Company
             OrgId:          MADT
             Address:        PO 29
             Address:        21668 Double Arch Dr 
             City:           Staunton
             StateProv:      IL
             PostalCode:     62088
             Country:        US
             RegDate:        2000-01-24
             Updated:        2025-11-05
             Comment:        Please submit all abuse complaints to
             Comment:        abuse@madisontelco.com
             Ref:            https://rdap.arin.net/registry/entity/MADT
             
             
             OrgAbuseHandle: ABUSE655-ARIN
             OrgAbuseName:   Abuse
             OrgAbusePhone:  +1-618-633-2267 
             OrgAbuseEmail:  abuse@madisontelco.com
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/ABUSE655-ARIN
             
             OrgTechHandle: WALDR142-ARIN
             OrgTechName:   Waldrop, Justin 
             OrgTechPhone:  +1-618-635-2077 
             OrgTechEmail:  jwaldrop@gomadison.com
             OrgTechRef:    https://rdap.arin.net/registry/entity/WALDR142-ARIN
             
             OrgTechHandle: JB1300-ARIN
             OrgTechName:   Bacher, Jan 
             OrgTechPhone:  +1-618-713-3777 
             OrgTechEmail:  jb@janbacher.com
             OrgTechRef:    https://rdap.arin.net/registry/entity/JB1300-ARIN
             
             RTechHandle: JB1300-ARIN
             RTechName:   Bacher, Jan 
             RTechPhone:  +1-618-713-3777 
             RTechEmail:  jb@janbacher.com
             RTechRef:    https://rdap.arin.net/registry/entity/JB1300-ARIN
             
             
             #
             # 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.
             #