Report for 27336

Name

SENTARA-HEALTH-CARE - Sentara Healthcare, 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.

27336 SENTARA-HEALTH-CARE - Sentara Healthcare, US

  Adjacency:     4  Upstream:     4  Downstream:     0
  Upstream Adjacent AS list
    AS3356          LEVEL3 - Level 3 Parent, LLC, US
    AS22773         ASN-CXA-ALL-CCI-22773-RDC - Cox Communications Inc., US
    AS7795          LUMOS - LUMOS Networks, Inc., US
    AS33657         CMCS - Comcast Cable Communications, LLC, US

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
2904  AS27336        ORIGIN  Originate:      73216 /15.84  Transit:          0 /0.00  SENTARA-HEALTH-CARE - Sentara Healthcare, 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       %
 3684 AS27336       SENTARA-HEALTH-CARE - Sentara Healthcare, US      23     14      0      9     14  60.87%


  Prefix               AS Path                              Aggregation Suggestion
  163.230.0.0/16       4608 7575 1299 22773 27336   
  163.230.7.0/24       4608 7575 1299 22773 27336 - Withdrawn - matching aggregate 163.230.0.0/16 4608 7575 1299 22773 27336
  163.230.58.0/24      4608 7575 1299 22773 27336 - Withdrawn - matching aggregate 163.230.0.0/16 4608 7575 1299 22773 27336
  163.230.98.0/24      4608 7575 1299 22773 27336 - Withdrawn - matching aggregate 163.230.0.0/16 4608 7575 1299 22773 27336
  163.230.99.0/24      4608 7575 1299 22773 27336 - Withdrawn - matching aggregate 163.230.0.0/16 4608 7575 1299 22773 27336
  163.230.100.0/23     4777 2497 1299 22773 27336   
  163.230.199.0/24     4777 2516 7922 33657 27336   
  163.230.200.0/21     4608 7575 1299 22773 27336 - Withdrawn - matching aggregate 163.230.0.0/16 4608 7575 1299 22773 27336
  163.230.200.0/24     4608 7575 1299 22773 27336 - Withdrawn - matching aggregate 163.230.0.0/16 4608 7575 1299 22773 27336
  163.230.201.0/24     4777 2497 1299 22773 27336   
  163.230.205.0/24     4777 2497 1299 22773 27336   
  163.230.224.0/24     4608 7575 1299 22773 27336 - Withdrawn - matching aggregate 163.230.0.0/16 4608 7575 1299 22773 27336
  163.230.236.0/24     4608 7575 1299 22773 27336 - Withdrawn - matching aggregate 163.230.0.0/16 4608 7575 1299 22773 27336
  163.230.237.0/24     4777 2497 3356 27336   
  163.230.242.0/24     4608 7575 2914 7795 27336   
  163.230.248.0/24     4608 7575 1299 22773 27336 - Withdrawn - matching aggregate 163.230.0.0/16 4608 7575 1299 22773 27336
  163.230.249.0/24     4608 7575 2914 7795 27336   
  163.230.250.0/24     4608 7575 2914 7795 27336   
  163.230.251.0/24     4608 7575 1299 22773 27336 - Withdrawn - matching aggregate 163.230.0.0/16 4608 7575 1299 22773 27336
  163.230.252.0/24     4608 7575 1299 22773 27336 - Withdrawn - matching aggregate 163.230.0.0/16 4608 7575 1299 22773 27336
  163.230.253.0/24     4608 7575 1299 22773 27336 - Withdrawn - matching aggregate 163.230.0.0/16 4608 7575 1299 22773 27336
  163.230.254.0/24     4608 7575 1299 22773 27336 - Withdrawn - matching aggregate 163.230.0.0/16 4608 7575 1299 22773 27336
  163.230.255.0/24     4608 7575 1299 22773 27336 - Withdrawn - matching aggregate 163.230.0.0/16 4608 7575 1299 22773 27336

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

AS27336   22 More Specifics   23 Total Advertisements   SENTARA-HEALTH-CARE - Sentara Healthcare, US
    163.230.7.0/24                163.230.0.0/16
    163.230.58.0/24               163.230.0.0/16
    163.230.98.0/24               163.230.0.0/16
    163.230.99.0/24               163.230.0.0/16
    163.230.100.0/23              163.230.0.0/16
    163.230.199.0/24              163.230.0.0/16
    163.230.200.0/21              163.230.0.0/16
    163.230.200.0/24              163.230.0.0/16
    163.230.201.0/24              163.230.0.0/16
    163.230.205.0/24              163.230.0.0/16
    163.230.224.0/24              163.230.0.0/16
    163.230.236.0/24              163.230.0.0/16
    163.230.237.0/24              163.230.0.0/16
    163.230.242.0/24              163.230.0.0/16
    163.230.248.0/24              163.230.0.0/16
    163.230.249.0/24              163.230.0.0/16
    163.230.250.0/24              163.230.0.0/16
    163.230.251.0/24              163.230.0.0/16
    163.230.252.0/24              163.230.0.0/16
    163.230.253.0/24              163.230.0.0/16
    163.230.254.0/24              163.230.0.0/16
    163.230.255.0/24              163.230.0.0/16

Whois Entry

whois: 402591

IANA has recorded AS27336 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS27336\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:       27336
             ASName:         SENTARA-HEALTH-CARE
             ASHandle:       AS27336
             RegDate:        2003-02-14
             Updated:        2012-03-02
             Ref:            https://rdap.arin.net/registry/autnum/27336
             
             
             OrgName:        Sentara Healthcare
             OrgId:          SHC-40
             Address:        800 Independence Blvd. Suite 101
             City:           Virginia Beach
             StateProv:      VA
             PostalCode:     23455
             Country:        US
             RegDate:        2003-01-14
             Updated:        2018-04-11
             Ref:            https://rdap.arin.net/registry/entity/SHC-40
             
             
             OrgTechHandle: SNO82-ARIN
             OrgTechName:   Sentara Network Operations
             OrgTechPhone:  +1-757-618-9774 
             OrgTechEmail:  wan@sentara.com
             OrgTechRef:    https://rdap.arin.net/registry/entity/SNO82-ARIN
             
             OrgAbuseHandle: SNO82-ARIN
             OrgAbuseName:   Sentara Network Operations
             OrgAbusePhone:  +1-757-618-9774 
             OrgAbuseEmail:  wan@sentara.com
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/SNO82-ARIN
             
             OrgTechHandle: SINCH-ARIN
             OrgTechName:   Sinchongco, Arnel 
             OrgTechPhone:  +1-757-857-8169 
             OrgTechEmail:  amsincho@sentara.com
             OrgTechRef:    https://rdap.arin.net/registry/entity/SINCH-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.
             #