26551 SARGENT-AND-LUNDY - Sargent & Lundy Engineers, US
Adjacency: 3 Upstream: 3 Downstream: 0
Upstream Adjacent AS list
AS6461 ZAYO-6461 - Zayo Bandwidth, US
AS3356 LEVEL3 - Level 3 Parent, LLC, US
AS2734 CORESITE - CoreSite, US
Rank AS Type Originate Addr Space (pfx) Transit Addr space (pfx) Description 2996 AS26551 ORIGIN Originate: 71168 /15.88 Transit: 0 /0.00 SARGENT-AND-LUNDY - Sargent & Lundy Engineers, 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 % 21979 AS26551 SARGENT-AND-LUNDY - Sargent & Lundy Engineers 5 1 0 4 1 20.00% Prefix AS Path Aggregation Suggestion 151.154.0.0/16 4777 2497 6461 26551 151.154.84.0/22 4777 2497 6461 26551 - Withdrawn - matching aggregate 151.154.0.0/16 4777 2497 6461 26551 151.154.103.0/24 4777 6939 2734 26551 151.154.128.0/20 4777 2516 3356 26551 151.154.223.0/24 4777 6939 2734 26551
Advertisements that are fragments of the original RIR allocation (more specifics) originated by this AS.
AS26551 4 More Specifics 5 Total Advertisements SARGENT-AND-LUNDY - Sargent & Lundy Engineers, US
151.154.84.0/22 151.154.0.0/16
151.154.103.0/24 151.154.0.0/16
151.154.128.0/20 151.154.0.0/16
151.154.223.0/24 151.154.0.0/16
whois: 402332
IANA has recorded AS26551 as originally allocated by
/usr/bin/whois -h jwhois.apnic.netr "AS26551\n
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ASNumber: 26551
ASName: SARGENT-AND-LUNDY
ASHandle: AS26551
RegDate: 2002-10-15
Updated: 2012-03-02
Ref: https://rdap.arin.net/registry/autnum/26551
OrgName: Sargent & Lundy Engineers
OrgId: SLE-1
Address: 55 E. Monroe Street
City: Chicago
StateProv: IL
PostalCode: 60603
Country: US
RegDate: 1991-07-30
Updated: 2025-12-28
Ref: https://rdap.arin.net/registry/entity/SLE-1
OrgDNSHandle: CHOUI16-ARIN
OrgDNSName: Chouikh, Mohammed
OrgDNSPhone: +1-312-269-6379
OrgDNSEmail: mohammed.chouikh@sargentlundy.com
OrgDNSRef: https://rdap.arin.net/registry/entity/CHOUI16-ARIN
OrgAbuseHandle: CB2411-ARIN
OrgAbuseName: Berns, Christine
OrgAbusePhone: +1-312-269-3598
OrgAbuseEmail: christine.m.berns@sargentlundy.com
OrgAbuseRef: https://rdap.arin.net/registry/entity/CB2411-ARIN
OrgDNSHandle: CB2411-ARIN
OrgDNSName: Berns, Christine
OrgDNSPhone: +1-312-269-3598
OrgDNSEmail: christine.m.berns@sargentlundy.com
OrgDNSRef: https://rdap.arin.net/registry/entity/CB2411-ARIN
OrgRoutingHandle: CHOUI16-ARIN
OrgRoutingName: Chouikh, Mohammed
OrgRoutingPhone: +1-312-269-6379
OrgRoutingEmail: mohammed.chouikh@sargentlundy.com
OrgRoutingRef: https://rdap.arin.net/registry/entity/CHOUI16-ARIN
OrgAbuseHandle: CHOUI16-ARIN
OrgAbuseName: Chouikh, Mohammed
OrgAbusePhone: +1-312-269-6379
OrgAbuseEmail: mohammed.chouikh@sargentlundy.com
OrgAbuseRef: https://rdap.arin.net/registry/entity/CHOUI16-ARIN
OrgRoutingHandle: CB2411-ARIN
OrgRoutingName: Berns, Christine
OrgRoutingPhone: +1-312-269-3598
OrgRoutingEmail: christine.m.berns@sargentlundy.com
OrgRoutingRef: https://rdap.arin.net/registry/entity/CB2411-ARIN
OrgTechHandle: CB2411-ARIN
OrgTechName: Berns, Christine
OrgTechPhone: +1-312-269-3598
OrgTechEmail: christine.m.berns@sargentlundy.com
OrgTechRef: https://rdap.arin.net/registry/entity/CB2411-ARIN
OrgTechHandle: CHOUI16-ARIN
OrgTechName: Chouikh, Mohammed
OrgTechPhone: +1-312-269-6379
OrgTechEmail: mohammed.chouikh@sargentlundy.com
OrgTechRef: https://rdap.arin.net/registry/entity/CHOUI16-ARIN
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#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
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# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
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