Report for 17224

Name

ATT-CERFNET-BLOCK - 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.

17224 ATT-CERFNET-BLOCK - AT&T Enhanced Network Services

  Adjacency:     2  Upstream:     1  Downstream:     1
  Upstream Adjacent AS list
    AS7018    ATT-INTERNET4 - AT&T WorldNet Services
  Downstream Adjacent AS list
    AS10002   JPNIC-NET-JP-AS-BLOCK Japan Network Information Center

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
4779  AS17224  ORG+TRN Originate:      17664 /17.89  Transit:        256 /24.00 ATT-CERFNET-BLOCK - AT&T Enhanced Network 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       %
 2563 AS17224 ATT-CERFNET-BLOCK - AT&T Enhanced Networ     32      8      4     28      4  12.50%


  Prefix               AS Path                              Aggregation Suggestion
  12.120.196.0/23      4637 3491 3561 7018 17224 + Announce - aggregate of 12.120.196.0/24 (4637 3491 3561 7018 17224) and 12.120.197.0/24 (4637 3491 3561 7018 17224)
  12.120.196.0/24      4637 3491 3561 7018 17224 - Withdrawn - aggregated with 12.120.197.0/24 (4637 3491 3561 7018 17224)
  12.120.197.0/24      4637 3491 3561 7018 17224 - Withdrawn - aggregated with 12.120.196.0/24 (4637 3491 3561 7018 17224)
  12.120.201.0/24      4637 3491 3561 7018 17224   
  12.120.202.0/23      4637 3491 3561 7018 17224 + Announce - aggregate of 12.120.202.0/24 (4637 3491 3561 7018 17224) and 12.120.203.0/24 (4637 3491 3561 7018 17224)
  12.120.202.0/24      4637 3491 3561 7018 17224 - Withdrawn - aggregated with 12.120.203.0/24 (4637 3491 3561 7018 17224)
  12.120.203.0/24      4637 3491 3561 7018 17224 - Withdrawn - aggregated with 12.120.202.0/24 (4637 3491 3561 7018 17224)
  12.120.204.0/23      4637 3491 3561 7018 17224 + Announce - aggregate of 12.120.204.0/24 (4637 3491 3561 7018 17224) and 12.120.205.0/24 (4637 3491 3561 7018 17224)
  12.120.204.0/24      4637 3491 3561 7018 17224 - Withdrawn - aggregated with 12.120.205.0/24 (4637 3491 3561 7018 17224)
  12.120.205.0/24      4637 3491 3561 7018 17224 - Withdrawn - aggregated with 12.120.204.0/24 (4637 3491 3561 7018 17224)
  12.194.172.0/24      4637 3491 3561 7018 17224   
  12.194.176.0/23      4637 3491 3561 7018 17224   
  12.194.180.0/24      4637 3491 3561 7018 17224   
  12.194.230.0/24      4637 3491 3561 7018 17224   
  12.194.234.0/23      4637 3491 3561 7018 17224   
  32.34.252.0/23       4637 3491 3561 7018 17224   
  32.35.68.0/22        4637 3491 3561 7018 17224   
  32.35.72.0/21        4637 3491 3561 7018 17224   
  32.35.80.0/22        4637 3491 3561 7018 17224   
  32.35.152.0/22       4637 3491 3561 7018 17224   
  32.35.156.0/24       4637 3491 3561 7018 17224   
  32.49.116.0/23       4637 3491 3561 7018 17224   
  32.49.240.0/22       4637 3491 3561 7018 17224   
  32.49.244.0/23       4637 3491 3561 7018 17224   
  32.245.192.0/23      4637 3491 3561 7018 17224   
  135.42.0.0/23        4637 3491 3561 7018 17224   
  135.42.2.0/24        4637 3491 3561 7018 17224   
  135.42.11.0/24       4637 3491 3561 7018 17224   
  135.42.12.0/24       4637 3491 3561 7018 17224   
  192.20.122.0/23      4637 3491 3561 7018 17224   
  192.20.124.0/22      4637 3491 3561 7018 17224   
  192.20.128.0/21      4637 3491 3561 7018 17224   
  207.116.58.0/23      4637 3491 3561 7018 17224 + Announce - aggregate of 207.116.58.0/24 (4637 3491 3561 7018 17224) and 207.116.59.0/24 (4637 3491 3561 7018 17224)
  207.116.58.0/24      4637 3491 3561 7018 17224 - Withdrawn - aggregated with 207.116.59.0/24 (4637 3491 3561 7018 17224)
  207.116.59.0/24      4637 3491 3561 7018 17224 - Withdrawn - aggregated with 207.116.58.0/24 (4637 3491 3561 7018 17224)
  207.116.61.0/24      4637 3491 3561 7018 17224   

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

AS17224   32 More Specifics   32 Total Advertisements   ATT-CERFNET-BLOCK - AT&T Enhanced Network Services
    12.120.196.0/24               12.0.0.0/8
    12.120.197.0/24               12.0.0.0/8
    12.120.201.0/24               12.0.0.0/8
    12.120.202.0/24               12.0.0.0/8
    12.120.203.0/24               12.0.0.0/8
    12.120.204.0/24               12.0.0.0/8
    12.120.205.0/24               12.0.0.0/8
    12.194.172.0/24               12.0.0.0/8
    12.194.176.0/23               12.0.0.0/8
    12.194.180.0/24               12.0.0.0/8
    12.194.230.0/24               12.0.0.0/8
    12.194.234.0/23               12.0.0.0/8
    32.34.252.0/23                32.0.0.0/8
    32.35.68.0/22                 32.0.0.0/8
    32.35.72.0/21                 32.0.0.0/8
    32.35.80.0/22                 32.0.0.0/8
    32.35.152.0/22                32.0.0.0/8
    32.35.156.0/24                32.0.0.0/8
    32.49.116.0/23                32.0.0.0/8
    32.49.240.0/22                32.0.0.0/8
    32.49.244.0/23                32.0.0.0/8
    32.245.192.0/23               32.0.0.0/8
    135.42.0.0/23                 135.40.0.0/13
    135.42.2.0/24                 135.40.0.0/13
    135.42.11.0/24                135.40.0.0/13
    135.42.12.0/24                135.40.0.0/13
    192.20.122.0/23               192.20.0.0/17
    192.20.124.0/22               192.20.0.0/17
    192.20.128.0/21               192.20.128.0/18
    207.116.58.0/24               207.116.0.0/16
    207.116.59.0/24               207.116.0.0/16
    207.116.61.0/24               207.116.0.0/16

Whois Entry

whois: 402603

IANA has recorded AS17224 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS17224\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:       17224 - 17233
             ASName:         ATT-CERFNET-BLOCK
             ASHandle:       AS17224
             RegDate:        2000-08-09
             Updated:        2025-03-19
             Ref:            https://rdap.arin.net/registry/autnum/17224
             
             
             
             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:        2026-06-05
             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@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.
             #