Report for 16857

Name

CENTEX - Central Texas Telecommunications, 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.

16857 CENTEX - Central Texas Telecommunications, US

  Adjacency:     5  Upstream:     4  Downstream:     1
  Upstream Adjacent AS list
    AS3356          LEVEL3 - Level 3 Parent, LLC, US
    AS1299          TWELVE99 - Arelion Sweden AB, SE
    AS46849         TLSN-TX - TEXAS LONE STAR NETWORK, LLC, US
    AS13876         FIBER-64 - FiberLight, LLC, US
  Downstream Adjacent AS list
    AS36658         ANGELOASPRIME - Angelo State University, US

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
8317  AS16857        ORG+TRN Originate:      14592 /18.17  Transit:       8192 /19.00 CENTEX - Central Texas Telecommunications, 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       %
 7197 AS16857       CENTEX - Central Texas Telecommunications, US     26     10      4     20      6  23.08%


  Prefix               AS Path                              Aggregation Suggestion
  66.208.96.0/24       4777 2516 174 46849 16857   
  66.208.99.0/24       4777 2516 174 46849 16857   
  66.208.102.0/23      4777 2516 1299 16857   
  66.208.105.0/24      4777 2516 3257 13876 16857   
  66.208.110.0/24      4777 2516 3257 13876 16857   
  69.7.80.0/24         4777 2516 3257 13876 16857   
  69.7.81.0/24         4777 2497 3356 16857   
  69.7.85.0/24         4777 2497 3356 16857   
  69.7.88.0/22         4777 2516 1299 16857   
  74.84.8.0/23         4777 2497 3356 16857 + Announce - aggregate of 74.84.8.0/24 (4777 2497 3356 16857) and 74.84.9.0/24 (4777 2497 3356 16857)
  74.84.8.0/24         4777 2497 3356 16857 - Withdrawn - aggregated with 74.84.9.0/24 (4777 2497 3356 16857)
  74.84.9.0/24         4777 2497 3356 16857 - Withdrawn - aggregated with 74.84.8.0/24 (4777 2497 3356 16857)
  74.84.10.0/24        4777 2497 3356 16857   
  74.84.20.0/22        4777 2516 1299 16857 + Announce - aggregate of 74.84.20.0/23 (4777 2516 1299 16857) and 74.84.22.0/23 (4777 2516 1299 16857)
  74.84.20.0/23        4777 2516 1299 16857 - Withdrawn - aggregated with 74.84.22.0/23 (4777 2516 1299 16857)
  74.84.22.0/23        4777 2516 1299 16857 - Withdrawn - aggregated with 74.84.20.0/23 (4777 2516 1299 16857)
  74.84.28.0/23        4777 2497 3356 16857   
  209.55.64.0/23       4777 2497 3356 16857   
  209.55.64.0/24       4777 2497 3356 16857 - Withdrawn - matching aggregate 209.55.64.0/23 4777 2497 3356 16857
  209.55.72.0/21       4777 2516 1299 16857   
  209.55.78.0/24       4777 2497 3356 16857   
  209.55.96.0/20       4777 2497 3356 16857 + Announce - aggregate of 209.55.96.0/21 (4777 2497 3356 16857) and 209.55.104.0/21 (4777 2497 3356 16857)
  209.55.96.0/21       4777 2497 3356 16857 - Withdrawn - aggregated with 209.55.104.0/21 (4777 2497 3356 16857)
  209.55.104.0/21      4777 2497 3356 16857 - Withdrawn - aggregated with 209.55.96.0/21 (4777 2497 3356 16857)
  209.55.104.0/23      4777 2497 1299 16857   
  209.55.106.0/23      4777 2497 3356 16857 - Withdrawn - matching aggregate 209.55.104.0/21 4777 2497 3356 16857
  209.55.106.0/24      4777 2516 3257 13876 16857   
  209.55.110.0/23      4777 2497 1299 16857 + Announce - aggregate of 209.55.110.0/24 (4777 2497 1299 16857) and 209.55.111.0/24 (4777 2497 1299 16857)
  209.55.110.0/24      4777 2497 1299 16857 - Withdrawn - aggregated with 209.55.111.0/24 (4777 2497 1299 16857)
  209.55.111.0/24      4777 2497 1299 16857 - Withdrawn - aggregated with 209.55.110.0/24 (4777 2497 1299 16857)

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

AS16857   26 More Specifics   26 Total Advertisements   CENTEX - Central Texas Telecommunications, US
    66.208.96.0/24                66.208.96.0/20
    66.208.99.0/24                66.208.96.0/20
    66.208.102.0/23               66.208.96.0/20
    66.208.105.0/24               66.208.96.0/20
    66.208.110.0/24               66.208.96.0/20
    69.7.80.0/24                  69.7.80.0/20
    69.7.81.0/24                  69.7.80.0/20
    69.7.85.0/24                  69.7.80.0/20
    69.7.88.0/22                  69.7.80.0/20
    74.84.8.0/24                  74.84.0.0/19
    74.84.9.0/24                  74.84.0.0/19
    74.84.10.0/24                 74.84.0.0/19
    74.84.20.0/23                 74.84.0.0/19
    74.84.22.0/23                 74.84.0.0/19
    74.84.28.0/23                 74.84.0.0/19
    209.55.64.0/23                209.55.64.0/18
    209.55.64.0/24                209.55.64.0/18
    209.55.72.0/21                209.55.64.0/18
    209.55.78.0/24                209.55.64.0/18
    209.55.96.0/21                209.55.64.0/18
    209.55.104.0/21               209.55.64.0/18
    209.55.104.0/23               209.55.64.0/18
    209.55.106.0/23               209.55.64.0/18
    209.55.106.0/24               209.55.64.0/18
    209.55.110.0/24               209.55.64.0/18
    209.55.111.0/24               209.55.64.0/18

Whois Entry

whois: 402609

IANA has recorded AS16857 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS16857\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:       16857
             ASName:         CENTEX
             ASHandle:       AS16857
             RegDate:        2000-06-20
             Updated:        2019-09-04
             Ref:            https://rdap.arin.net/registry/autnum/16857
             
             
             OrgName:        Central Texas Telecommunications
             OrgId:          CTTC-7
             Address:        PO Box 627
             City:           Goldthwaite
             StateProv:      TX
             PostalCode:     76844
             Country:        US
             RegDate:        2019-08-12
             Updated:        2026-01-27
             Ref:            https://rdap.arin.net/registry/entity/CTTC-7
             
             
             OrgNOCHandle: SC1235-ARIN
             OrgNOCName:   Calder, Shawn 
             OrgNOCPhone:  +1-325-938-5611 
             OrgNOCEmail:  shawnc@centexnet.com
             OrgNOCRef:    https://rdap.arin.net/registry/entity/SC1235-ARIN
             
             OrgTechHandle: MWG4-ARIN
             OrgTechName:   Garrison, Mitchell Wayne
             OrgTechPhone:  +1-325-656-7000 
             OrgTechEmail:  mitchg@centexnet.com
             OrgTechRef:    https://rdap.arin.net/registry/entity/MWG4-ARIN
             
             OrgNOCHandle: SYSTE112-ARIN
             OrgNOCName:   System Administrator
             OrgNOCPhone:  +1-325-938-5611 
             OrgNOCEmail:  sysadmin@centex.net
             OrgNOCRef:    https://rdap.arin.net/registry/entity/SYSTE112-ARIN
             
             OrgTechHandle: SYSTE112-ARIN
             OrgTechName:   System Administrator
             OrgTechPhone:  +1-325-938-5611 
             OrgTechEmail:  sysadmin@centex.net
             OrgTechRef:    https://rdap.arin.net/registry/entity/SYSTE112-ARIN
             
             OrgAbuseHandle: SC1235-ARIN
             OrgAbuseName:   Calder, Shawn 
             OrgAbusePhone:  +1-325-938-5611 
             OrgAbuseEmail:  shawnc@centexnet.com
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/SC1235-ARIN
             
             OrgAbuseHandle: SYSTE112-ARIN
             OrgAbuseName:   System Administrator
             OrgAbusePhone:  +1-325-938-5611 
             OrgAbuseEmail:  sysadmin@centex.net
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/SYSTE112-ARIN
             
             OrgTechHandle: SC1235-ARIN
             OrgTechName:   Calder, Shawn 
             OrgTechPhone:  +1-325-938-5611 
             OrgTechEmail:  shawnc@centexnet.com
             OrgTechRef:    https://rdap.arin.net/registry/entity/SC1235-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.
             #