Report for 54439

Name

MCGM-FIBERNET3 - Montgomery County Government, Maryland, 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.

54439 MCGM-FIBERNET3 - Montgomery County Government, Maryland, US

  Adjacency:     1  Upstream:     1  Downstream:     0
  Upstream Adjacent AS list
    AS40468         MONTGOMERYCOUNTYMDGOV - Montgomery County Government, Maryland, US

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
19226 AS54439        ORIGIN  Originate:       3328 /20.30  Transit:          0 /0.00  MCGM-FIBERNET3 - Montgomery County Government, Maryland, 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       %
 8731 AS54439       MCGM-FIBERNET3 - Montgomery County Government     13     10      5      8      5  38.46%


  Prefix               AS Path                              Aggregation Suggestion
  192.26.21.0/24       4777 6939 40468 54439   
  192.41.166.0/23      4777 6939 40468 54439 + Announce - aggregate of 192.41.166.0/24 (4777 6939 40468 54439) and 192.41.167.0/24 (4777 6939 40468 54439)
  192.41.166.0/24      4777 6939 40468 54439 - Withdrawn - aggregated with 192.41.167.0/24 (4777 6939 40468 54439)
  192.41.167.0/24      4777 6939 40468 54439 - Withdrawn - aggregated with 192.41.166.0/24 (4777 6939 40468 54439)
  192.41.168.0/23      4777 6939 40468 54439 + Announce - aggregate of 192.41.168.0/24 (4777 6939 40468 54439) and 192.41.169.0/24 (4777 6939 40468 54439)
  192.41.168.0/24      4777 6939 40468 54439 - Withdrawn - aggregated with 192.41.169.0/24 (4777 6939 40468 54439)
  192.41.169.0/24      4777 6939 40468 54439 - Withdrawn - aggregated with 192.41.168.0/24 (4777 6939 40468 54439)
  208.76.112.0/24      4777 6939 40468 54439   
  208.76.114.0/23      4777 6939 40468 54439 + Announce - aggregate of 208.76.114.0/24 (4777 6939 40468 54439) and 208.76.115.0/24 (4777 6939 40468 54439)
  208.76.114.0/24      4777 6939 40468 54439 - Withdrawn - aggregated with 208.76.115.0/24 (4777 6939 40468 54439)
  208.76.115.0/24      4777 6939 40468 54439 - Withdrawn - aggregated with 208.76.114.0/24 (4777 6939 40468 54439)
  208.76.116.0/23      4777 6939 40468 54439 + Announce - aggregate of 208.76.116.0/24 (4777 6939 40468 54439) and 208.76.117.0/24 (4777 6939 40468 54439)
  208.76.116.0/24      4777 6939 40468 54439 - Withdrawn - aggregated with 208.76.117.0/24 (4777 6939 40468 54439)
  208.76.117.0/24      4777 6939 40468 54439 - Withdrawn - aggregated with 208.76.116.0/24 (4777 6939 40468 54439)
  208.76.119.0/24      4777 6939 40468 54439   
  213.18.192.0/23      4777 6939 40468 54439 + Announce - aggregate of 213.18.192.0/24 (4777 6939 40468 54439) and 213.18.193.0/24 (4777 6939 40468 54439)
  213.18.192.0/24      4777 6939 40468 54439 - Withdrawn - aggregated with 213.18.193.0/24 (4777 6939 40468 54439)
  213.18.193.0/24      4777 6939 40468 54439 - Withdrawn - aggregated with 213.18.192.0/24 (4777 6939 40468 54439)

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

AS54439   12 More Specifics   13 Total Advertisements   MCGM-FIBERNET3 - Montgomery County Government, Maryland, US
    192.41.166.0/24               192.41.164.0/22
    192.41.167.0/24               192.41.164.0/22
    192.41.168.0/24               192.41.168.0/23
    192.41.169.0/24               192.41.168.0/23
    208.76.112.0/24               208.76.112.0/21
    208.76.114.0/24               208.76.112.0/21
    208.76.115.0/24               208.76.112.0/21
    208.76.116.0/24               208.76.112.0/21
    208.76.117.0/24               208.76.112.0/21
    208.76.119.0/24               208.76.112.0/21
    213.18.192.0/24               213.18.192.0/19
    213.18.193.0/24               213.18.192.0/19

Whois Entry

whois: 402332

IANA has recorded AS54439 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS54439\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:       54439
             ASName:         MCGM-FIBERNET3
             ASHandle:       AS54439
             RegDate:        2020-12-31
             Updated:        2021-03-08
             Ref:            https://rdap.arin.net/registry/autnum/54439
             
             
             OrgName:        Montgomery County Government, Maryland
             OrgId:          MCGM
             Address:        100 Maryland Ave.
             Address:        Suite 300
             City:           Rockville
             StateProv:      MD
             PostalCode:     20850
             Country:        US
             RegDate:        2006-10-12
             Updated:        2025-10-07
             Ref:            https://rdap.arin.net/registry/entity/MCGM
             
             
             OrgRoutingHandle: RGS11-ARIN
             OrgRoutingName:   Shields, Robert Gene
             OrgRoutingPhone:  +1-703-283-3884 
             OrgRoutingEmail:  rob.shields@montgomerycountymd.gov
             OrgRoutingRef:    https://rdap.arin.net/registry/entity/RGS11-ARIN
             
             OrgTechHandle: RGS11-ARIN
             OrgTechName:   Shields, Robert Gene
             OrgTechPhone:  +1-703-283-3884 
             OrgTechEmail:  rob.shields@montgomerycountymd.gov
             OrgTechRef:    https://rdap.arin.net/registry/entity/RGS11-ARIN
             
             OrgNOCHandle: MDG40-ARIN
             OrgNOCName:   Gardner, Mark Daniel
             OrgNOCPhone:  +1-240-773-8116 
             OrgNOCEmail:  mark.gardner@montgomerycountymd.gov
             OrgNOCRef:    https://rdap.arin.net/registry/entity/MDG40-ARIN
             
             OrgAbuseHandle: WEBST183-ARIN
             OrgAbuseName:   Webster, Joe 
             OrgAbusePhone:  +1-240-773-8133 
             OrgAbuseEmail:  joseph.webster@montgomerycountymd.gov
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/WEBST183-ARIN
             
             OrgDNSHandle: MDG40-ARIN
             OrgDNSName:   Gardner, Mark Daniel
             OrgDNSPhone:  +1-240-773-8116 
             OrgDNSEmail:  mark.gardner@montgomerycountymd.gov
             OrgDNSRef:    https://rdap.arin.net/registry/entity/MDG40-ARIN
             
             OrgDNSHandle: RGS11-ARIN
             OrgDNSName:   Shields, Robert Gene
             OrgDNSPhone:  +1-703-283-3884 
             OrgDNSEmail:  rob.shields@montgomerycountymd.gov
             OrgDNSRef:    https://rdap.arin.net/registry/entity/RGS11-ARIN
             
             OrgTechHandle: RMN9-ARIN
             OrgTechName:   Nussey, Roderick MacIntyre
             OrgTechPhone:  +1-240-777-2110 
             OrgTechEmail:  rod.nussey@montgomerycountymd.gov
             OrgTechRef:    https://rdap.arin.net/registry/entity/RMN9-ARIN
             
             OrgAbuseHandle: RGS11-ARIN
             OrgAbuseName:   Shields, Robert Gene
             OrgAbusePhone:  +1-703-283-3884 
             OrgAbuseEmail:  rob.shields@montgomerycountymd.gov
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/RGS11-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.
             #