[ IP ]
104.21.37.251
#421,139Top IPs · 1M scope2 domains
Overview
Top IPs list rank
- 1M
- #421,139(3 observation hits)
- Hosted domains (90 days)
- 2
- Hosted domains (all time)
- 2
- First seen
- Wed Jul 15 2026 21:42:54 GM
- Last seen
- Mon Aug 10 2026 07:26:06 GM
- PDNS hits (90 days)
- 3
- Country
- US
- Snapshot
- 1970-01-01
Network operated by Cloudflare, Inc. (CLOUD14) (CLOUDFLARENET).
List rank history
13 daily snapshots in the Top IPs list (1M scope). Lower rank numbers indicate more accumulated passive-DNS observation evidence.
Whois — 104.21.37.251
- Netname
- CLOUDFLARENET
- Organization
- Cloudflare, Inc. (CLOUD14)
- 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: 104.16.0.0 - 104.31.255.255 CIDR: 104.16.0.0/12 NetName: CLOUDFLARENET NetHandle: NET-104-16-0-0-1 Parent: NET104 (NET-104-0-0-0-0) NetType: Direct Allocation OriginAS: Organization: Cloudflare, Inc. (CLOUD14) RegDate: 2014-03-28 Updated: 2024-09-04 Comment: All Cloudflare abuse reporting can be done via https://www.cloudflare.com/abuse Comment: Geofeed: https://api.cloudflare.com/local-ip-ranges.csv Ref: https://rdap.arin.net/registry/ip/104.16.0.0 OrgName: Cloudflare, Inc. OrgId: CLOUD14 Address: 101 Townsend Street City: San Francisco StateProv: CA PostalCode: 94107 Country: US RegDate: 2010-07-09 Updated: 2024-11-25 Ref: https://rdap.arin.net/registry/entity/CLOUD14 OrgAbuseHandle: ABUSE2916-ARIN OrgAbuseName: Abuse OrgAbusePhone: +1-650-319-8930 OrgAbuseEmail: [email protected] OrgAbuseRef: https://rdap.arin.net/registry/entity/ABUSE2916-ARIN OrgNOCHandle: CLOUD146-ARIN OrgNOCName: Cloudflare-NOC OrgNOCPhone: +1-650-319-8930 OrgNOCEmail: [email protected] OrgNOCRef: https://rdap.arin.net/registry/entity/CLOUD146-ARIN OrgRoutingHandle: CLOUD146-ARIN OrgRoutingName: Cloudflare-NOC OrgRoutingPhone: +1-650-319-8930 OrgRoutingEmail: [email protected] OrgRoutingRef: https://rdap.arin.net/registry/entity/CLOUD146-ARIN OrgTechHandle: ADMIN2521-ARIN OrgTechName: Admin OrgTechPhone: +1-650-319-8930 OrgTechEmail: [email protected] OrgTechRef: https://rdap.arin.net/registry/entity/ADMIN2521-ARIN RTechHandle: ADMIN2521-ARIN RTechName: Admin RTechPhone: +1-650-319-8930 RTechEmail: [email protected] RTechRef: https://rdap.arin.net/registry/entity/ADMIN2521-ARIN RNOCHandle: NOC11962-ARIN RNOCName: NOC RNOCPhone: +1-650-319-8930 RNOCEmail: [email protected] RNOCRef: https://rdap.arin.net/registry/entity/NOC11962-ARIN RAbuseHandle: ABUSE2916-ARIN RAbuseName: Abuse RAbusePhone: +1-650-319-8930 RAbuseEmail: [email protected] RAbuseRef: https://rdap.arin.net/registry/entity/ABUSE2916-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 — 104.21.37.251
Port scan not run for 104.21.37.251 yet. Probes are queued from passive DNS IPs in the worker pipeline.