Report for 3621

Name

MCIASN-BLK - Verizon Business, 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 AS4637) 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.

3621 MCIASN-BLK - MCI Telecommunications

  Adjacency:     1  Upstream:     1  Downstream:     0
  Upstream Adjacent AS list
    AS701     UUNET - MCI Communications Services, Inc. d/b/a Verizon Business

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
2317  AS3621   ORIGIN  Originate:      66304 /15.98  Transit:          0 /0.00  MCIASN-BLK - MCI Telecommunications

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       %
 2856 AS3621  MCIASN-BLK - MCI Telecommunications           4      3      0      1      3  75.00%


  Prefix               AS Path                              Aggregation Suggestion
  166.60.0.0/16        4637 3491 701 3621     
  166.60.2.0/24        4637 3491 701 3621   - Withdrawn - matching aggregate 166.60.0.0/16 4637 3491 701 3621
  166.60.5.0/24        4637 3491 701 3621   - Withdrawn - matching aggregate 166.60.0.0/16 4637 3491 701 3621
  166.60.19.0/24       4637 3491 701 3621   - Withdrawn - matching aggregate 166.60.0.0/16 4637 3491 701 3621

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

AS3621   3 More Specifics   4 Total Advertisements   MCIASN-BLK - MCI Telecommunications
    166.60.2.0/24                 166.60.0.0/16
    166.60.5.0/24                 166.60.0.0/16
    166.60.19.0/24                166.60.0.0/16

Whois Entry

whois: 402603

IANA has recorded AS3621 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS3621\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:       3617 - 3623
             ASName:         MCIASN-BLK
             ASHandle:       AS3617
             RegDate:        1994-05-24
             Updated:        2024-07-02
             Ref:            https://rdap.arin.net/registry/autnum/3617
             
             
             
             OrgName:        Verizon Business
             OrgId:          MCICS
             Address:        22001 Loudoun County Pkwy
             City:           Ashburn
             StateProv:      VA
             PostalCode:     20147
             Country:        US
             RegDate:        2006-05-30
             Updated:        2025-10-28
             Ref:            https://rdap.arin.net/registry/entity/MCICS
             
             
             OrgTechHandle: VIS1-ARIN
             OrgTechName:   Verizon Internet Services
             OrgTechPhone:  +1-800-243-6994 
             OrgTechEmail:  IPMGMT@verizon.com
             OrgTechRef:    https://rdap.arin.net/registry/entity/VIS1-ARIN
             
             OrgDNSHandle: VZDNS1-ARIN
             OrgDNSName:   VZ-DNSADMIN
             OrgDNSPhone:  +1-800-900-0241 
             OrgDNSEmail:  dnsadmin@verizon.com
             OrgDNSRef:    https://rdap.arin.net/registry/entity/VZDNS1-ARIN
             
             OrgTechHandle: SWIPP9-ARIN
             OrgTechName:   SWIPPER
             OrgTechPhone:  +1-800-900-0241 
             OrgTechEmail:  swipper@verizonbusiness.com
             OrgTechRef:    https://rdap.arin.net/registry/entity/SWIPP9-ARIN
             
             OrgAbuseHandle: ABUSE5603-ARIN
             OrgAbuseName:   Abuse
             OrgAbusePhone:  +1-800-900-0241 
             OrgAbuseEmail:  abuse@verizon.com
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/ABUSE5603-ARIN
             
             OrgAbuseHandle: ABUSE3-ARIN
             OrgAbuseName:   abuse
             OrgAbusePhone:  +1-800-900-0241 
             OrgAbuseEmail:  abuse@verizon.com
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/ABUSE3-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.
             #