Report for 5728

Name

WORLDNET1 - AT&T Enterprises, LLC, 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 AS4637) 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.

5728 WORLDNET1 - AT&T WorldNet Services

  Adjacency:     1  Upstream:     1  Downstream:     0
  Upstream Adjacent AS list
    AS7018    ATT-INTERNET4 - AT&T WorldNet Services

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
15937 AS5728   ORIGIN  Originate:        768 /22.42  Transit:          0 /0.00  WORLDNET1 - AT&T WorldNet Services

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       %
 4478 AS5728  WORLDNET1 - AT&T WorldNet Services            3      2      1      2      1  33.33%


  Prefix               AS Path                              Aggregation Suggestion
  199.37.173.0/24      4637 3491 3561 7018 5728   
  199.37.180.0/23      4637 3491 3561 7018 5728 + Announce - aggregate of 199.37.180.0/24 (4637 3491 3561 7018 5728) and 199.37.181.0/24 (4637 3491 3561 7018 5728)
  199.37.180.0/24      4637 3491 3561 7018 5728 - Withdrawn - aggregated with 199.37.181.0/24 (4637 3491 3561 7018 5728)
  199.37.181.0/24      4637 3491 3561 7018 5728 - Withdrawn - aggregated with 199.37.180.0/24 (4637 3491 3561 7018 5728)

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

AS5728   3 More Specifics   3 Total Advertisements   WORLDNET1 - AT&T WorldNet Services
    199.37.173.0/24               199.37.0.0/16
    199.37.180.0/24               199.37.0.0/16
    199.37.181.0/24               199.37.0.0/16

Whois Entry

whois: 402332

IANA has recorded AS5728 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS5728\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:       5728
             ASName:         WORLDNET1
             ASHandle:       AS5728
             RegDate:        1995-09-13
             Updated:        2025-03-18
             Ref:            https://rdap.arin.net/registry/autnum/5728
             
             
             
             OrgName:        AT&T Enterprises, LLC
             OrgId:          AEL-360
             Address:        208 S. Akard St.
             City:           Dallas
             StateProv:      TX
             PostalCode:     75202
             Country:        US
             RegDate:        2024-11-22
             Updated:        2025-10-29
             Ref:            https://rdap.arin.net/registry/entity/AEL-360
             
             
             OrgRoutingHandle: ROUTI59-ARIN
             OrgRoutingName:   Routing POC
             OrgRoutingPhone:  +1-999-999-9999 
             OrgRoutingEmail:  routing_poc@att.com
             OrgRoutingRef:    https://rdap.arin.net/registry/entity/ROUTI59-ARIN
             
             OrgTechHandle: ZS44-ARIN
             OrgTechName:   IPAdmin-ATT Internet Services
             OrgTechPhone:  +1-888-510-5545 
             OrgTechEmail:  ipadmin@semail.att.com
             OrgTechRef:    https://rdap.arin.net/registry/entity/ZS44-ARIN
             
             OrgAbuseHandle: ABUSE7-ARIN
             OrgAbuseName:   abuse
             OrgAbusePhone:  +1-919-319-8167 
             OrgAbuseEmail:  abuse@att.net
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/ABUSE7-ARIN
             
             OrgTechHandle: ICC-ARIN
             OrgTechName:   IP Team
             OrgTechPhone:  +1-888-876-2382 
             OrgTechEmail:  rm-ipspecialist@att.com
             OrgTechRef:    https://rdap.arin.net/registry/entity/ICC-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.
             #