[ IP ]

104.21.57.28

#57,173Top IPs · 1M scope0 domains

Overview

Top IPs list rank

1M: #57,173(221 observation hits)

Hosted domains (90 days): 0
Hosted domains (all time): 0
First seen
Last seen: Mon Oct 05 2026 02:12:20 GM
PDNS hits (90 days): 222
Country: US
Snapshot: 1970-01-01

Network operated by Cloudflare, Inc. (CLOUD14) (CLOUDFLARENET).

List rank history

30 daily snapshots in the Top IPs list (1M scope). Lower rank numbers indicate more accumulated passive-DNS observation evidence.

Whois — 104.21.57.28

Netname: CLOUDFLARENET
Organization: Cloudflare, Inc. (CLOUD14)
Country: US
ASN: —

Registry record

WHOIS

Registry fields

Network range: 104.16.0.0 - 104.31.255.255
CIDR: 104.16.0.0/12
Network name: CLOUDFLARENET
Net Handle: NET-104-16-0-0-1
Parent network: NET104 (NET-104-0-0-0-0)

Hosted domains — PDNS pivot

No hosted domains found for 104.21.57.28 in passive DNS yet.

# # 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. #