Report for 17233

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.

17233 ATT-CERFNET-BLOCK - AT&T Enhanced Network Services

  Adjacency:     2  Upstream:     2  Downstream:     0
  Upstream Adjacent AS list
    AS7018    ATT-INTERNET4 - AT&T WorldNet Services
    AS10912   INTERNAP-BLK - Internap Network Services

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
3664  AS17233  ORIGIN  Originate:      35328 /16.89  Transit:          0 /0.00  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       %
 1281 AS17233 ATT-CERFNET-BLOCK - AT&T Enhanced Networ     22     12      2     12     10  45.45%


  Prefix               AS Path                              Aggregation Suggestion
  12.129.192.0/18      4637 3491 3561 7018 17233   
  12.129.216.0/24      4637 3491 3561 7018 17233 - Withdrawn - matching aggregate 12.129.192.0/18 4637 3491 3561 7018 17233
  12.129.245.0/24      4637 3491 3561 7018 17233 - Withdrawn - matching aggregate 12.129.192.0/18 4637 3491 3561 7018 17233
  12.129.254.0/23      4637 3491 3561 7018 17233 - Withdrawn - matching aggregate 12.129.192.0/18 4637 3491 3561 7018 17233
  12.148.80.0/22       4637 3491 3561 7018 17233   
  134.24.80.0/21       4637 3491 3561 7018 17233   
  134.24.80.0/24       4637 3491 3561 7018 17233 - Withdrawn - matching aggregate 134.24.80.0/21 4637 3491 3561 7018 17233
  149.17.32.0/20       4637 3549 10912 17233 17233 17233   
  198.74.32.0/21       4637 3491 3561 7018 17233 + Announce - aggregate of 198.74.32.0/22 (4637 3491 3561 7018 17233) and 198.74.36.0/22 (4637 3491 3561 7018 17233)
  198.74.32.0/24       4637 3491 3561 7018 17233 - Withdrawn - aggregated with 198.74.33.0/24 (4637 3491 3561 7018 17233)
  198.74.33.0/24       4637 3491 3561 7018 17233 - Withdrawn - aggregated with 198.74.32.0/24 (4637 3491 3561 7018 17233)
  198.74.34.0/23       4637 3491 3561 7018 17233 - Withdrawn - aggregated with 198.74.32.0/23 (4637 3491 3561 7018 17233)
  198.74.36.0/23       4637 3491 3561 7018 17233 - Withdrawn - aggregated with 198.74.38.0/23 (4637 3491 3561 7018 17233)
  198.74.38.0/24       4637 3491 3561 7018 17233 - Withdrawn - aggregated with 198.74.39.0/24 (4637 3491 3561 7018 17233)
  198.74.39.0/24       4637 3491 3561 7018 17233 - Withdrawn - aggregated with 198.74.38.0/24 (4637 3491 3561 7018 17233)
  198.74.40.0/23       4637 3491 3561 7018 17233 + Announce - aggregate of 198.74.40.0/24 (4637 3491 3561 7018 17233) and 198.74.41.0/24 (4637 3491 3561 7018 17233)
  198.74.40.0/24       4637 3491 3561 7018 17233 - Withdrawn - aggregated with 198.74.41.0/24 (4637 3491 3561 7018 17233)
  198.74.41.0/24       4637 3491 3561 7018 17233 - Withdrawn - aggregated with 198.74.40.0/24 (4637 3491 3561 7018 17233)
  199.106.200.0/21     4637 3491 3561 7018 17233   
  204.109.28.0/23      4637 3491 3561 7018 17233   
  205.137.16.0/20      4637 3491 3561 7018 17233   
  206.16.68.0/23       4637 3491 3561 7018 17233   
  206.16.160.0/24      4637 3491 3561 7018 17233   
  216.148.0.0/23       4637 3491 3561 7018 17233   

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

AS17233   27 More Specifics   28 Total Advertisements   ATT-CERFNET-BLOCK - AT&T Enhanced Network Services
    12.64.255.0/24                12.0.0.0/8
    12.65.96.0/19                 12.0.0.0/8
    12.65.128.0/18                12.0.0.0/8
    12.67.7.0/24                  12.0.0.0/8
    12.129.192.0/18               12.0.0.0/8
    12.129.216.0/24               12.0.0.0/8
    12.129.245.0/24               12.0.0.0/8
    12.129.254.0/23               12.0.0.0/8
    12.148.80.0/22                12.0.0.0/8
    32.229.192.0/18               32.0.0.0/8
    134.24.80.0/21                134.24.0.0/16
    134.24.80.0/24                134.24.0.0/16
    149.17.32.0/20                149.17.0.0/16
    198.74.32.0/24                198.74.32.0/21
    198.74.33.0/24                198.74.32.0/21
    198.74.34.0/23                198.74.32.0/21
    198.74.36.0/23                198.74.32.0/21
    198.74.38.0/24                198.74.32.0/21
    198.74.39.0/24                198.74.32.0/21
    198.74.40.0/24                198.74.40.0/23
    198.74.41.0/24                198.74.40.0/23
    199.106.200.0/21              199.105.0.0/14
    204.109.28.0/23               204.109.16.0/20
    206.16.68.0/23                206.16.0.0/14
    206.16.160.0/21               206.16.0.0/14
    206.16.160.0/24               206.16.0.0/14
    216.148.0.0/23                216.148.0.0/16

Whois Entry

whois: 402603

IANA has recorded AS17233 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS17233\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.
             #