Report for 396973

Name

DHS-39H - Department of Homeland Security, 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.

396973 DHS-39H - Department of Homeland Security, US

  Adjacency:     2  Upstream:     2  Downstream:     0
  Upstream Adjacent AS list
    AS13335         CLOUDFLARENET - Cloudflare, Inc., US
    AS7018          ATT-INTERNET4 - AT&T Enterprises, LLC, US

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
28911 AS396973       ORIGIN  Originate:       2048 /21.00  Transit:          0 /0.00  DHS-39H - Department of Homeland Security, 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       %
30309 AS396973      DHS-39H - Department of Homeland Security, US      8      2      1      7      1  12.50%


  Prefix               AS Path                              Aggregation Suggestion
  208.73.184.0/24      4777 2497 7018 396973   
  208.73.185.0/24      4777 2497 7018 396973 396973   
  208.73.186.0/24      4777 2497 7018 396973   
  208.73.187.0/24      4777 2497 7018 396973 396973   
  208.73.188.0/23      4777 13335 396973    + Announce - aggregate of 208.73.188.0/24 (4777 13335 396973) and 208.73.189.0/24 (4777 13335 396973)
  208.73.188.0/24      4777 13335 396973    - Withdrawn - aggregated with 208.73.189.0/24 (4777 13335 396973)
  208.73.189.0/24      4777 13335 396973    - Withdrawn - aggregated with 208.73.188.0/24 (4777 13335 396973)
  208.73.190.0/24      4777 13335 396973      
  208.73.191.0/24      4777 2497 7018 396973   

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

AS396973   8 More Specifics   8 Total Advertisements   DHS-39H - Department of Homeland Security, US
    208.73.184.0/24               208.73.184.0/21
    208.73.185.0/24               208.73.184.0/21
    208.73.186.0/24               208.73.184.0/21
    208.73.187.0/24               208.73.184.0/21
    208.73.188.0/24               208.73.184.0/21
    208.73.189.0/24               208.73.184.0/21
    208.73.190.0/24               208.73.184.0/21
    208.73.191.0/24               208.73.184.0/21

Whois Entry

whois: 402332

IANA has recorded AS396973 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS396973\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:       396973
             ASName:         DHS-39H
             ASHandle:       AS396973
             RegDate:        2018-08-06
             Updated:        2018-08-06
             Ref:            https://rdap.arin.net/registry/autnum/396973
             
             
             OrgName:        Department of Homeland Security
             OrgId:          DHS-39
             Address:        1110 North Glebe Road
             City:           Arlington
             StateProv:      VA
             PostalCode:     22201
             Country:        US
             RegDate:        2006-04-21
             Updated:        2026-01-28
             Ref:            https://rdap.arin.net/registry/entity/DHS-39
             
             
             OrgAbuseHandle: LAMAN53-ARIN
             OrgAbuseName:   lam, anh-thu 
             OrgAbusePhone:  +1-202-394-5951 
             OrgAbuseEmail:  anh.lam@mail.cisa.dhs.gov
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/LAMAN53-ARIN
             
             OrgDNSHandle: STARK172-ARIN
             OrgDNSName:   Starkey, Damon 
             OrgDNSPhone:  +1-771-202-4748 
             OrgDNSEmail:  damon.starkey@associates.cisa.dhs.gov
             OrgDNSRef:    https://rdap.arin.net/registry/entity/STARK172-ARIN
             
             OrgTechHandle: PARKB18-ARIN
             OrgTechName:   Park, Brandon 
             OrgTechPhone:  +1-202-294-1939 
             OrgTechEmail:  brandon.park@mail.associates.cisa.dhs.gov
             OrgTechRef:    https://rdap.arin.net/registry/entity/PARKB18-ARIN
             
             OrgTechHandle: STARK172-ARIN
             OrgTechName:   Starkey, Damon 
             OrgTechPhone:  +1-771-202-4748 
             OrgTechEmail:  damon.starkey@associates.cisa.dhs.gov
             OrgTechRef:    https://rdap.arin.net/registry/entity/STARK172-ARIN
             
             OrgNOCHandle: LAMAN53-ARIN
             OrgNOCName:   lam, anh-thu 
             OrgNOCPhone:  +1-202-394-5951 
             OrgNOCEmail:  anh.lam@mail.cisa.dhs.gov
             OrgNOCRef:    https://rdap.arin.net/registry/entity/LAMAN53-ARIN
             
             OrgNOCHandle: BEALL59-ARIN
             OrgNOCName:   Beall, Nikki 
             OrgNOCPhone:  +1-202-320-5578 
             OrgNOCEmail:  nikki.beall@mail.cisa.dhs.gov
             OrgNOCRef:    https://rdap.arin.net/registry/entity/BEALL59-ARIN
             
             OrgRoutingHandle: DELON43-ARIN
             OrgRoutingName:   DeLong, Jeremy 
             OrgRoutingPhone:  +1-850-307-7275 
             OrgRoutingEmail:  jeremy.delong@cisa.dhs.gov
             OrgRoutingRef:    https://rdap.arin.net/registry/entity/DELON43-ARIN
             
             OrgDNSHandle: LAMAN53-ARIN
             OrgDNSName:   lam, anh-thu 
             OrgDNSPhone:  +1-202-394-5951 
             OrgDNSEmail:  anh.lam@mail.cisa.dhs.gov
             OrgDNSRef:    https://rdap.arin.net/registry/entity/LAMAN53-ARIN
             
             OrgTechHandle: GROSS398-ARIN
             OrgTechName:   Grossman, Stephen 
             OrgTechPhone:  +1-301-800-6939 
             OrgTechEmail:  stephen.grossman@associates.cisa.dhs.gov
             OrgTechRef:    https://rdap.arin.net/registry/entity/GROSS398-ARIN
             
             OrgTechHandle: LAMAN53-ARIN
             OrgTechName:   lam, anh-thu 
             OrgTechPhone:  +1-202-394-5951 
             OrgTechEmail:  anh.lam@mail.cisa.dhs.gov
             OrgTechRef:    https://rdap.arin.net/registry/entity/LAMAN53-ARIN
             
             OrgTechHandle: KUMAR402-ARIN
             OrgTechName:   Kumar, Asim 
             OrgTechPhone:  +1-703-395-5745 
             OrgTechEmail:  asim.kumar@associates.cisa.dhs.gov
             OrgTechRef:    https://rdap.arin.net/registry/entity/KUMAR402-ARIN
             
             OrgNOCHandle: DELON43-ARIN
             OrgNOCName:   DeLong, Jeremy 
             OrgNOCPhone:  +1-850-307-7275 
             OrgNOCEmail:  jeremy.delong@cisa.dhs.gov
             OrgNOCRef:    https://rdap.arin.net/registry/entity/DELON43-ARIN
             
             OrgRoutingHandle: LAMAN53-ARIN
             OrgRoutingName:   lam, anh-thu 
             OrgRoutingPhone:  +1-202-394-5951 
             OrgRoutingEmail:  anh.lam@mail.cisa.dhs.gov
             OrgRoutingRef:    https://rdap.arin.net/registry/entity/LAMAN53-ARIN
             
             OrgTechHandle: SWANS257-ARIN
             OrgTechName:   Swanson, Joseph 
             OrgTechPhone:  +1-804-334-7410 
             OrgTechEmail:  joseph.swanson@implicitsolutionsllc.com
             OrgTechRef:    https://rdap.arin.net/registry/entity/SWANS257-ARIN
             
             OrgTechHandle: AHI54-ARIN
             OrgTechName:   Ibrahim, Ali Husni
             OrgTechPhone:  +1-315-516-1151 
             OrgTechEmail:  ali.h.ibrahim@associates.cbp.dhs.gov
             OrgTechRef:    https://rdap.arin.net/registry/entity/AHI54-ARIN
             
             OrgTechHandle: LAMME51-ARIN
             OrgTechName:   Lammers, Charles 
             OrgTechPhone:  +1-703-424-0591 
             OrgTechEmail:  charles.lammers@mail.associates.cisa.dhs.gov
             OrgTechRef:    https://rdap.arin.net/registry/entity/LAMME51-ARIN
             
             OrgTechHandle: DELON43-ARIN
             OrgTechName:   DeLong, Jeremy 
             OrgTechPhone:  +1-850-307-7275 
             OrgTechEmail:  jeremy.delong@cisa.dhs.gov
             OrgTechRef:    https://rdap.arin.net/registry/entity/DELON43-ARIN
             
             OrgTechHandle: MURPH652-ARIN
             OrgTechName:   Murphy, Marvin 
             OrgTechPhone:  +1-850-619-0569 
             OrgTechEmail:  marvin.murphy@mail.associates.cisa.dhs.gov
             OrgTechRef:    https://rdap.arin.net/registry/entity/MURPH652-ARIN
             
             OrgAbuseHandle: DELON43-ARIN
             OrgAbuseName:   DeLong, Jeremy 
             OrgAbusePhone:  +1-850-307-7275 
             OrgAbuseEmail:  jeremy.delong@cisa.dhs.gov
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/DELON43-ARIN
             
             OrgDNSHandle: DELON43-ARIN
             OrgDNSName:   DeLong, Jeremy 
             OrgDNSPhone:  +1-850-307-7275 
             OrgDNSEmail:  jeremy.delong@cisa.dhs.gov
             OrgDNSRef:    https://rdap.arin.net/registry/entity/DELON43-ARIN
             
             OrgTechHandle: MIYAN2-ARIN
             OrgTechName:   Miyani, Pratik 
             OrgTechPhone:  +1-202-769-6164 
             OrgTechEmail:  PRATIK.MIYANI@associates.cisa.dhs.gov
             OrgTechRef:    https://rdap.arin.net/registry/entity/MIYAN2-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.
             #