Report for 10953

Name

CEG - CONSTELLATION ENERGY GENERATION, LLC, 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.

10953 PECO - PECO Energy Company

  Adjacency:     2  Upstream:     2  Downstream:     0
  Upstream Adjacent AS list
    AS3356    LEVEL3 Level 3 Communications
    AS7911    LVLT-7911 - Level 3 Communications, Inc.

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
2477  AS10953  ORIGIN  Originate:      65792 /15.99  Transit:          0 /0.00  PECO - PECO Energy Company

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       %
 8927 AS10953 PECO - PECO Energy Company                    2      0      0      2      0   0.00%


  Prefix               AS Path                              Aggregation Suggestion
  159.214.0.0/16       4637 3356 10953        
  159.214.87.0/24      4637 3356 7911 10953   

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

AS10953   1 More Specifics   2 Total Advertisements   PECO - PECO Energy Company
    159.214.87.0/24               159.214.0.0/16

Whois Entry

whois: 402603

IANA has recorded AS10953 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS10953\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.
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             ASNumber:       10953
             ASName:         CEG
             ASHandle:       AS10953
             RegDate:        1998-02-10
             Updated:        2024-01-11
             Ref:            https://rdap.arin.net/registry/autnum/10953
             
             
             OrgName:        CONSTELLATION ENERGY GENERATION, LLC
             OrgId:          CEG-74
             Address:        1310 Point Street
             Address:        16th Floor
             City:           Baltimore
             StateProv:      MD
             PostalCode:     21231
             Country:        US
             RegDate:        2023-08-17
             Updated:        2023-09-19
             Ref:            https://rdap.arin.net/registry/entity/CEG-74
             
             
             OrgAbuseHandle: CEGNO-ARIN
             OrgAbuseName:   CEG NOC
             OrgAbusePhone:  +1-844-523-4486 
             OrgAbuseEmail:  noc@constellation.com
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/CEGNO-ARIN
             
             OrgTechHandle: CEGNO-ARIN
             OrgTechName:   CEG NOC
             OrgTechPhone:  +1-844-523-4486 
             OrgTechEmail:  noc@constellation.com
             OrgTechRef:    https://rdap.arin.net/registry/entity/CEGNO-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.
             #