21737 SPRINGNET2-NET, US
Adjacency: 9 Upstream: 3 Downstream: 6
Upstream Adjacent AS list
AS174 COGENT-174, US
AS3356 LEVEL3, US
AS1299 TWELVE99 Arelion, fka Telia Carrier, SE
Downstream Adjacent AS list
AS20296 EXPEDIA-ARIN, US
AS33252 BASSPRO-AS, US
AS21835 SCARSDALE-SECURITY-SYSTEMS, US
AS30628 SRC-AUTOMOTIVE-INC, US
AS63051 CRITICALHOSTING-USA, US
AS393977 GSB, US
Rank AS Type Originate Addr Space (pfx) Transit Addr space (pfx) Description 5974 AS21737 ORG+TRN Originate: 26112 /17.33 Transit: 2304 /20.83 SPRINGNET2-NET, 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 % 12509 AS21737 SPRINGNET2-NET, US 10 3 0 7 3 30.00% Prefix AS Path Aggregation Suggestion 64.22.224.0/19 2914 3356 21737 64.22.225.0/24 2914 1299 21737 64.22.249.0/24 2914 3356 21737 - Withdrawn - matching aggregate 64.22.224.0/19 2914 3356 21737 64.22.255.0/24 2914 3356 21737 - Withdrawn - matching aggregate 64.22.224.0/19 2914 3356 21737 66.119.0.0/19 2914 3356 21737 75.98.96.0/20 2914 3356 21737 75.98.102.0/24 2914 1299 21737 75.98.103.0/24 2914 3356 21737 - Withdrawn - matching aggregate 75.98.96.0/20 2914 3356 21737 76.77.128.0/20 2914 3356 21737 198.246.200.0/24 2914 3356 21737
Advertisements that are fragments of the original RIR allocation (more specifics) originated by this AS.
AS21737 9 More Specifics 14 Total Advertisements SPRINGNET2-NET, US
64.22.225.0/24 64.22.224.0/19
64.22.227.0/24 64.22.224.0/19
64.22.242.0/24 64.22.224.0/19
64.22.249.0/24 64.22.224.0/19
64.22.255.0/24 64.22.224.0/19
64.189.36.0/24 64.189.0.0/16
75.98.102.0/24 75.98.96.0/20
75.98.103.0/24 75.98.96.0/20
209.51.80.0/23 209.51.64.0/19
Prefixes added and withdrawn by this origin AS in the past 7 days.
+ 64.189.36.0/24 Announced
+ 209.51.80.0/23 Announced
whois: 402551
IANA has recorded AS21737 as originally allocated by
/usr/bin/whois -h jwhois.apnic.netr "AS21737\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
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# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
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ASNumber: 21737
ASName: SPRINGNET2-NET
ASHandle: AS21737
RegDate: 2001-06-18
Updated: 2005-09-29
Ref: https://rdap.arin.net/registry/autnum/21737
OrgName: SpringNet
OrgId: SPGN
Address: 301 E. Central
City: Springfield
StateProv: MO
PostalCode: 65802
Country: US
RegDate: 2001-06-01
Updated: 2025-02-09
Ref: https://rdap.arin.net/registry/entity/SPGN
OrgDNSHandle: ARINS14-ARIN
OrgDNSName: arin@springnet
OrgDNSPhone: +1-417-831-8688
OrgDNSEmail: arin@springnet.net
OrgDNSRef: https://rdap.arin.net/registry/entity/ARINS14-ARIN
OrgRoutingHandle: ARINS14-ARIN
OrgRoutingName: arin@springnet
OrgRoutingPhone: +1-417-831-8688
OrgRoutingEmail: arin@springnet.net
OrgRoutingRef: https://rdap.arin.net/registry/entity/ARINS14-ARIN
OrgNOCHandle: ARINS14-ARIN
OrgNOCName: arin@springnet
OrgNOCPhone: +1-417-831-8688
OrgNOCEmail: arin@springnet.net
OrgNOCRef: https://rdap.arin.net/registry/entity/ARINS14-ARIN
OrgAbuseHandle: ABUSE7702-ARIN
OrgAbuseName: Abuse
OrgAbusePhone: +1-417-874-8000
OrgAbuseEmail: abuse@springnet.net
OrgAbuseRef: https://rdap.arin.net/registry/entity/ABUSE7702-ARIN
OrgTechHandle: ARINS14-ARIN
OrgTechName: arin@springnet
OrgTechPhone: +1-417-831-8688
OrgTechEmail: arin@springnet.net
OrgTechRef: https://rdap.arin.net/registry/entity/ARINS14-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.
#