Report for 21520

Name

Instituto Tecnologico Autonomo de MexicoITAM, MX

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.

21520 Instituto Tecnologico Autonomo de MexicoITAM, MX

  Adjacency:     3  Upstream:     3  Downstream:     0
  Upstream Adjacent AS list
    AS32098         TRANSTELCO-INC - Transtelco Inc, US
    AS3356          LEVEL3 - Level 3 Parent, LLC, US
    AS18734         Operbes, S.A. de C.V., MX

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
7032  AS21520        ORIGIN  Originate:      19456 /17.75  Transit:          0 /0.00  Instituto Tecnologico Autonomo de MexicoITAM, MX

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       %
21649 AS21520       Instituto Tecnologico Autonomo de MexicoITAM,     20      2      1     19      1   5.00%


  Prefix               AS Path                              Aggregation Suggestion
  148.205.36.0/22      4777 2497 3356 21520   
  148.205.40.0/22      4777 2497 3356 21520   
  148.205.48.0/22      4777 2497 3356 21520   
  148.205.56.0/21      4777 2497 3356 21520   
  148.205.64.0/21      4777 2497 3356 21520 + Announce - aggregate of 148.205.64.0/22 (4777 2497 3356 21520) and 148.205.68.0/22 (4777 2497 3356 21520)
  148.205.64.0/22      4777 2497 3356 21520 - Withdrawn - aggregated with 148.205.68.0/22 (4777 2497 3356 21520)
  148.205.68.0/22      4777 2497 3356 21520 - Withdrawn - aggregated with 148.205.64.0/22 (4777 2497 3356 21520)
  148.205.72.0/22      4777 2497 3356 21520   
  148.205.89.0/24      4608 7575 2914 32098 21520   
  148.205.90.0/24      4777 2497 3356 21520   
  148.205.104.0/21     4777 2497 3356 21520   
  148.205.120.0/24     4777 2497 3356 21520   
  148.205.132.0/22     4777 2497 3356 21520   
  148.205.136.0/22     4777 2497 3356 21520   
  148.205.148.0/22     4777 2497 3356 21520   
  148.205.164.0/22     4777 2497 3356 21520   
  148.205.176.0/22     4777 2497 3356 21520   
  148.205.193.0/24     4777 2516 3257 18734 21520   
  148.205.196.0/22     4777 2497 3356 21520   
  148.205.228.0/22     4777 2497 3356 21520   
  148.205.236.0/22     4777 2497 3356 21520   

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

AS21520   20 More Specifics   20 Total Advertisements   Instituto Tecnologico Autonomo de MexicoITAM, MX
    148.205.36.0/22               148.205.0.0/16
    148.205.40.0/22               148.205.0.0/16
    148.205.48.0/22               148.205.0.0/16
    148.205.56.0/21               148.205.0.0/16
    148.205.64.0/22               148.205.0.0/16
    148.205.68.0/22               148.205.0.0/16
    148.205.72.0/22               148.205.0.0/16
    148.205.89.0/24               148.205.0.0/16
    148.205.90.0/24               148.205.0.0/16
    148.205.104.0/21              148.205.0.0/16
    148.205.120.0/24              148.205.0.0/16
    148.205.132.0/22              148.205.0.0/16
    148.205.136.0/22              148.205.0.0/16
    148.205.148.0/22              148.205.0.0/16
    148.205.164.0/22              148.205.0.0/16
    148.205.176.0/22              148.205.0.0/16
    148.205.193.0/24              148.205.0.0/16
    148.205.196.0/22              148.205.0.0/16
    148.205.228.0/22              148.205.0.0/16
    148.205.236.0/22              148.205.0.0/16

Whois Entry

whois: 402332

IANA has recorded AS21520 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS21520\n             % IP Client: 2401:2000:6660::13
              
             % Joint Whois - whois.lacnic.net
             %  This server accepts single ASN, IPv4 or IPv6 queries
             
             % LACNIC resource: whois.lacnic.net
             
             
             % Copyright LACNIC lacnic.net
             %  The data below is provided for information purposes
             %  and to assist persons in obtaining information about or
             %  related to AS and IP numbers registrations
             %  By submitting a whois query, you agree to use this data
             %  only for lawful purposes.
             %  2026-03-30 17:25:02 (-03 -03:00)
             
             aut-num:     AS21520
             owner:       Instituto Tecnologico Autonomo de Mexico(ITAM)
             ownerid:     MX-ITAM-LACNIC
             responsible: Monica Arrieta
             address:     Río Hondo, 1, Progreso Tizapán
             address:     01080 - México - CX
             country:     MX
             phone:       +52 55 56284137
             owner-c:     UFR
             routing-c:   UFR
             abuse-c:     UFR
             created:     20010515
             changed:     20040315
             
             nic-hdl:     UFR
             person:      Uciel Fragoso
             e-mail:      uciel@itam.mx
             address:     Río Hondo, 1, Col Progreso Tizapan
             address:     01080 - Mexico - CX
             country:     MX
             phone:       +52  5537179780
             created:     20040331
             changed:     20210922
             
             % whois.lacnic.net accepts only direct match queries.
             % Types of queries are: POCs, ownerid, CIDR blocks, IP
             % and AS numbers.