Report for 19739

Name

COUNTY-SANBERNARDINO - County of San Bernardino, 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.

19739 COUNTY-SANBERNARDINO - County of San Bernardino, US

  Adjacency:     3  Upstream:     3  Downstream:     0
  Upstream Adjacent AS list
    AS3356          LEVEL3 - Level 3 Parent, LLC, US
    AS5650          FRONTIER-FRTR - Frontier Communications of America, Inc., US
    AS20001         TWC-20001-PACWEST - Charter Communications Inc, US

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
10297 AS19739        ORIGIN  Originate:       9984 /18.71  Transit:          0 /0.00  COUNTY-SANBERNARDINO - County of San Bernardino, 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       %
10004 AS19739       COUNTY-SANBERNARDINO - County of San Bernardi     25      8      4     21      4  16.00%


  Prefix               AS Path                              Aggregation Suggestion
  170.164.0.0/24       4777 2497 3356 19739   
  170.164.10.0/23      4777 2516 3356 5650 19739 + Announce - aggregate of 170.164.10.0/24 (4777 2516 3356 5650 19739) and 170.164.11.0/24 (4777 2516 3356 5650 19739)
  170.164.10.0/24      4777 2516 3356 5650 19739 - Withdrawn - aggregated with 170.164.11.0/24 (4777 2516 3356 5650 19739)
  170.164.11.0/24      4777 2516 3356 5650 19739 - Withdrawn - aggregated with 170.164.10.0/24 (4777 2516 3356 5650 19739)
  170.164.14.0/24      4777 2497 3356 19739   
  170.164.40.0/22      4777 2516 3356 19739 + Announce - aggregate of 170.164.40.0/23 (4777 2516 3356 19739) and 170.164.42.0/23 (4777 2516 3356 19739)
  170.164.40.0/23      4777 2516 3356 19739 - Withdrawn - aggregated with 170.164.42.0/23 (4777 2516 3356 19739)
  170.164.42.0/23      4777 2516 3356 19739 - Withdrawn - aggregated with 170.164.40.0/23 (4777 2516 3356 19739)
  170.164.44.0/23      4777 2516 3356 19739   
  170.164.50.0/24      4777 2497 3356 19739   
  170.164.60.0/24      4777 2497 3356 19739   
  170.164.70.0/24      4777 2497 3356 19739   
  170.164.71.0/24      4777 2516 7843 20001 19739   
  170.164.75.0/24      4777 2497 3356 19739   
  170.164.84.0/23      4777 2516 3356 19739   
  170.164.87.0/24      4777 2497 3356 19739   
  170.164.97.0/24      4777 2497 3356 19739   
  170.164.101.0/24     4777 2516 3356 19739   
  170.164.107.0/24     4777 2516 3356 5650 19739   
  170.164.116.0/22     4777 2497 3356 19739   
  170.164.124.0/23     4777 2516 3356 19739 + Announce - aggregate of 170.164.124.0/24 (4777 2516 3356 19739) and 170.164.125.0/24 (4777 2516 3356 19739)
  170.164.124.0/24     4777 2516 3356 19739 - Withdrawn - aggregated with 170.164.125.0/24 (4777 2516 3356 19739)
  170.164.125.0/24     4777 2516 3356 19739 - Withdrawn - aggregated with 170.164.124.0/24 (4777 2516 3356 19739)
  170.164.165.0/24     4777 2497 3356 19739   
  170.164.239.0/24     4777 2497 3356 19739   
  170.164.240.0/21     4777 2497 3356 19739   
  170.164.248.0/23     4777 2497 3356 19739 + Announce - aggregate of 170.164.248.0/24 (4777 2497 3356 19739) and 170.164.249.0/24 (4777 2497 3356 19739)
  170.164.248.0/24     4777 2497 3356 19739 - Withdrawn - aggregated with 170.164.249.0/24 (4777 2497 3356 19739)
  170.164.249.0/24     4777 2497 3356 19739 - Withdrawn - aggregated with 170.164.248.0/24 (4777 2497 3356 19739)

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

AS19739   25 More Specifics   25 Total Advertisements   COUNTY-SANBERNARDINO - County of San Bernardino, US
    170.164.0.0/24                170.164.0.0/16
    170.164.10.0/24               170.164.0.0/16
    170.164.11.0/24               170.164.0.0/16
    170.164.14.0/24               170.164.0.0/16
    170.164.40.0/23               170.164.0.0/16
    170.164.42.0/23               170.164.0.0/16
    170.164.44.0/23               170.164.0.0/16
    170.164.50.0/24               170.164.0.0/16
    170.164.60.0/24               170.164.0.0/16
    170.164.70.0/24               170.164.0.0/16
    170.164.71.0/24               170.164.0.0/16
    170.164.75.0/24               170.164.0.0/16
    170.164.84.0/23               170.164.0.0/16
    170.164.87.0/24               170.164.0.0/16
    170.164.97.0/24               170.164.0.0/16
    170.164.101.0/24              170.164.0.0/16
    170.164.107.0/24              170.164.0.0/16
    170.164.116.0/22              170.164.0.0/16
    170.164.124.0/24              170.164.0.0/16
    170.164.125.0/24              170.164.0.0/16
    170.164.165.0/24              170.164.0.0/16
    170.164.239.0/24              170.164.0.0/16
    170.164.240.0/21              170.164.0.0/16
    170.164.248.0/24              170.164.0.0/16
    170.164.249.0/24              170.164.0.0/16

Whois Entry

whois: 402332

IANA has recorded AS19739 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS19739\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:       19739
             ASName:         COUNTY-SANBERNARDINO
             ASHandle:       AS19739
             RegDate:        2001-02-08
             Updated:        2021-08-19
             Ref:            https://rdap.arin.net/registry/autnum/19739
             
             
             OrgName:        County of San Bernardino
             OrgId:          CSB-1
             Address:        OMS/SSD
             Address:         670 E.Gilbert St.
             City:           San Bernardino
             StateProv:      CA
             PostalCode:     92415-0915
             Country:        US
             RegDate:        1992-01-17
             Updated:        2021-08-23
             Ref:            https://rdap.arin.net/registry/entity/CSB-1
             
             
             OrgTechHandle: DVR-ARIN
             OrgTechName:   Robbins, David V
             OrgTechPhone:  +1-909-388-5553 
             OrgTechEmail:  david.robbins@itd.sbcounty.gov
             OrgTechRef:    https://rdap.arin.net/registry/entity/DVR-ARIN
             
             OrgAbuseHandle: DVR-ARIN
             OrgAbuseName:   Robbins, David V
             OrgAbusePhone:  +1-909-388-5553 
             OrgAbuseEmail:  david.robbins@itd.sbcounty.gov
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/DVR-ARIN
             
             RNOCHandle: DVR-ARIN
             RNOCName:   Robbins, David V
             RNOCPhone:  +1-909-388-5553 
             RNOCEmail:  david.robbins@itd.sbcounty.gov
             RNOCRef:    https://rdap.arin.net/registry/entity/DVR-ARIN
             
             RAbuseHandle: DVR-ARIN
             RAbuseName:   Robbins, David V
             RAbusePhone:  +1-909-388-5553 
             RAbuseEmail:  david.robbins@itd.sbcounty.gov
             RAbuseRef:    https://rdap.arin.net/registry/entity/DVR-ARIN
             
             RTechHandle: DVR-ARIN
             RTechName:   Robbins, David V
             RTechPhone:  +1-909-388-5553 
             RTechEmail:  david.robbins@itd.sbcounty.gov
             RTechRef:    https://rdap.arin.net/registry/entity/DVR-ARIN
             
             RTechHandle: EJM33-ARIN
             RTechName:   Montengero, Eduardo  J
             RTechPhone:  +1-909-388-5571 
             RTechEmail:  emontenegro@isd.sbcounty.gov
             RTechRef:    https://rdap.arin.net/registry/entity/EJM33-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.
             #