Report for 13979

Name

ATT-IPFR - 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 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.

13979 ATT-IPFR - AT&T Enterprises, LLC, US

  Adjacency:    11  Upstream:     5  Downstream:     6
  Upstream Adjacent AS list
    AS33            HPINC - HP Inc., US
    AS3423          ATTIS-ASN3423 - AT&T Enterprises, LLC, US
    AS4185          ATTIS-ASN4185 - AT&T Enterprises, LLC, US
    AS4473          ATTIS-ASN4473 - AT&T Enterprises, LLC, US
    AS306           DNIC-ASBLK-00306-00371 - United States Department of Defense (DoD), US
  Downstream Adjacent AS list
    AS8034          WORLDNET5-10 - AT&T WorldNet, US
    AS8035          WORLDNET5-10 - AT&T WorldNet, US
    AS10616         NTIS - National Oceanic and Atmospheric Administration, US
    AS14298         EPA-NET - Environmental Protection Agency, US
    AS8076          HUD - Department of Housing and Urban Development, US
    AS2576          DOT-AS - U. S. Department of Transportation, US

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
2663  AS13979        ORG+TRN Originate:      81920 /15.68  Transit:     568576 /12.88 ATT-IPFR - AT&T Enterprises, LLC, 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       %
33077 AS13979       ATT-IPFR - AT&T Enterprises, LLC, US               2      0      0      2      0   0.00%


  Prefix               AS Path                              Aggregation Suggestion
  15.12.64.0/18        4777 2497 7018 33 13979   
  55.224.0.0/16        4777 2516 3356 721 721 27064 367 306 13979 13979   

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

AS13979   2 More Specifics   2 Total Advertisements   ATT-IPFR - AT&T Enterprises, LLC, US
    15.12.64.0/18                 15.0.0.0/10
    55.224.0.0/16                 55.0.0.0/8

Whois Entry

whois: 402591

IANA has recorded AS13979 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS13979\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:       13979
             ASName:         ATT-IPFR
             ASHandle:       AS13979
             RegDate:        1999-09-28
             Updated:        2025-03-18
             Ref:            https://rdap.arin.net/registry/autnum/13979
             
             
             
             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
             
             
             OrgAbuseHandle: ABUSE7-ARIN
             OrgAbuseName:   abuse
             OrgAbusePhone:  +1-919-319-8167 
             OrgAbuseEmail:  abuse@att.net
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/ABUSE7-ARIN
             
             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: ICC-ARIN
             OrgTechName:   IP Team
             OrgTechPhone:  +1-888-876-2382 
             OrgTechEmail:  rm-ipspecialist@att.com
             OrgTechRef:    https://rdap.arin.net/registry/entity/ICC-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
             
             
             #
             # 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.
             #