Report for 28521

Name

AT&T COMUNICACIONES DIGITALES S DE RL, 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.

28521 AT&T COMUNICACIONES DIGITALES S DE RL, MX

  Adjacency:     2  Upstream:     2  Downstream:     0
  Upstream Adjacent AS list
    AS28469         AT&T COMUNICACIONES DIGITALES S DE RL, MX
    AS11172         Alestra, S. de R.L. de C.V., MX

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
44741 AS28521        ORIGIN  Originate:        768 /22.42  Transit:          0 /0.00  AT&T COMUNICACIONES DIGITALES S DE RL, 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       %
38630 AS28521       AT&T COMUNICACIONES DIGITALES S DE RL, MX          2      0      0      2      0   0.00%


  Prefix               AS Path                              Aggregation Suggestion
  201.130.56.0/23      4777 2497 3356 28469 28521   
  201.130.56.0/24      4777 2516 174 11172 11172 11172 11172 11172 11172 11172 11172 11172 11172 28521   

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

AS28521   2 More Specifics   2 Total Advertisements   AT&T COMUNICACIONES DIGITALES S DE RL, MX
    201.130.56.0/23               201.130.48.0/20
    201.130.56.0/24               201.130.48.0/20

Whois Entry

whois: 402332

IANA has recorded AS28521 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS28521\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.
             %  2026-03-31 21:03:51 (-03 -03:00)
             
             aut-num:     AS28521
             owner:       AT&T COMUNICACIONES DIGITALES S DE RL
             ownerid:     MX-ACDS-LACNIC
             responsible: Alejandro Giordano Carranco
             address:     RIO LERMA, 232, PISO 20 COL. CUAUHTEMOC
             address:     06500 - CUAUHTEMOC - CX
             country:     MX
             phone:       +52  554115000
             owner-c:     CHA24
             routing-c:   OSH9
             abuse-c:     OSH9
             created:     20060313
             changed:     20160823
             
             nic-hdl:     CHA24
             person:      Security IP Core
             e-mail:      ac087b@att.com
             address:     Río Lerma, 232, Cuauhtemoc
             address:     06500 - Cuauhtemoc - CX
             country:     MX
             phone:       +52  5541150000
             created:     20160908
             changed:     20211020
             
             nic-hdl:     OSH9
             person:      OMAR SANCHEZ HERNANDEZ
             e-mail:      os321b@att.com
             address:     Río Lerma, 232, piso 20 Colonia Cuauhtémoc
             address:     06500 - Cuauhtémoc - CX
             country:     MX
             phone:       +52  5591402800
             created:     20160419
             changed:     20170107
             
             % whois.lacnic.net accepts only direct match queries.
             % Types of queries are: POCs, ownerid, CIDR blocks, IP
             % and AS numbers.