[ IP ]
131.142.21.11
#428,087Top IPs · 1M scope1 domain
Overview
Top IPs list rank
- 1M
- #428,087(1 domains)
- Hosted domains (90 days)
- 1
- Hosted domains (all time)
- 1
- First seen
- Wed Jul 15 2026 00:44:31 GM
- Last seen
- Wed Jul 15 2026 00:44:31 GM
- PDNS hits (90 days)
- 2
- Country
- US
- Snapshot
- 1970-01-01
Network operated by Smithsonian Astrophysical Observatory (SI-2-Z) (CFA-NET).
List rank history
1 daily snapshots in the Top IPs list (1M scope). Lower rank numbers indicate more hosted domains in scope.
Whois — 131.142.21.11
- Netname
- CFA-NET
- Organization
- Smithsonian Astrophysical Observatory (SI-2-Z)
- Country
- US
- ASN
- —
Full whois record
# # 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. # NetRange: 131.142.0.0 - 131.142.255.255 CIDR: 131.142.0.0/16 NetName: CFA-NET NetHandle: NET-131-142-0-0-1 Parent: NET131 (NET-131-0-0-0-0) NetType: Direct Allocation OriginAS: Organization: Smithsonian Astrophysical Observatory (SI-2-Z) RegDate: 1988-11-21 Updated: 2023-12-18 Ref: https://rdap.arin.net/registry/ip/131.142.0.0 OrgName: Smithsonian Astrophysical Observatory OrgId: SI-2-Z Address: 60 Garden St. City: Cambridge StateProv: MA PostalCode: 02138 Country: US RegDate: 2023-11-17 Updated: 2025-05-12 Ref: https://rdap.arin.net/registry/entity/SI-2-Z OrgNOCHandle: SAP26-ARIN OrgNOCName: SAO Admin POC OrgNOCPhone: +1-617-496-7931 OrgNOCEmail: [email protected] OrgNOCRef: https://rdap.arin.net/registry/entity/SAP26-ARIN OrgTechHandle: SAP26-ARIN OrgTechName: SAO Admin POC OrgTechPhone: +1-617-496-7931 OrgTechEmail: [email protected] OrgTechRef: https://rdap.arin.net/registry/entity/SAP26-ARIN OrgAbuseHandle: SAAP-ARIN OrgAbuseName: SAO Admin Abuse POC OrgAbusePhone: +1-617-496-7931 OrgAbuseEmail: [email protected] OrgAbuseRef: https://rdap.arin.net/registry/entity/SAAP-ARIN RTechHandle: RAH81-ARIN RTechName: Hewett, Robert A RTechPhone: +1-617-384-6594 RTechEmail: [email protected] RTechRef: https://rdap.arin.net/registry/entity/RAH81-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. #
Open ports — 131.142.21.11
Port scan not run for 131.142.21.11 yet. Probes are queued from passive DNS IPs in the worker pipeline.