# # 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 OrgNOCHandle: CLOUD146-ARIN OrgNOCName: Cloudflare-NOC OrgNOCPhone: +1-650-319-8930 OrgNOCEmail: noc@cloudflare.com OrgNOCRef: https://rdap.arin.net/registry/entity/CLOUD146-ARIN OrgAbuseHandle: ABUSE2916-ARIN OrgAbuseName: Abuse OrgAbusePhone: +1-650-319-8930 OrgAbuseEmail: abuse@cloudflare.com OrgAbuseRef: https://rdap.arin.net/registry/entity/ABUSE2916-ARIN OrgTechHandle: ADMIN2521-ARIN OrgTechName: Admin OrgTechPhone: +1-650-319-8930 OrgTechEmail: rir@cloudflare.com OrgTechRef: https://rdap.arin.net/registry/entity/ADMIN2521-ARIN OrgRoutingHandle: CLOUD146-ARIN OrgRoutingName: Cloudflare-NOC OrgRoutingPhone: +1-650-319-8930 OrgRoutingEmail: noc@cloudflare.com OrgRoutingRef: https://rdap.arin.net/registry/entity/CLOUD146-ARIN RAbuseHandle: ABUSE2916-ARIN RAbuseName: Abuse RAbusePhone: +1-650-319-8930 RAbuseEmail: abuse@cloudflare.com RAbuseRef: https://rdap.arin.net/registry/entity/ABUSE2916-ARIN RTechHandle: ADMIN2521-ARIN RTechName: Admin RTechPhone: +1-650-319-8930 RTechEmail: rir@cloudflare.com RTechRef: https://rdap.arin.net/registry/entity/ADMIN2521-ARIN RNOCHandle: NOC11962-ARIN RNOCName: NOC RNOCPhone: +1-650-319-8930 RNOCEmail: noc@cloudflare.com RNOCRef: https://rdap.arin.net/registry/entity/NOC11962-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. #

Host 52.235.21.104.in-addr.arpa. not found: 3(NXDOMAIN)

; <<>> DiG 9.11.4-P2-RedHat-9.11.4-26.P2.el7_9.9 <<>> 104.21.235.52 ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 64680 ;; flags: qr rd ra ad; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 512 ;; QUESTION SECTION: ;104.21.235.52. IN A ;; AUTHORITY SECTION: . 86398 IN SOA a.root-servers.net. nstld.verisign-grs.com. 2026061301 1800 900 604800 86400 ;; Query time: 5 msec ;; SERVER: 8.8.8.8#53(8.8.8.8) ;; WHEN: Sun Jun 14 04:36:04 UTC 2026 ;; MSG SIZE rcvd: 117

** server can't find 52.235.21.104.in-addr.arpa.: NXDOMAIN

PING 104.21.235.52 (104.21.235.52) 56(84) bytes of data. 64 bytes from 104.21.235.52: icmp_seq=1 ttl=56 time=14.0 ms 64 bytes from 104.21.235.52: icmp_seq=2 ttl=56 time=13.7 ms 64 bytes from 104.21.235.52: icmp_seq=3 ttl=56 time=13.8 ms --- 104.21.235.52 ping statistics --- 3 packets transmitted, 3 received, 0% packet loss, time 2002ms rtt min/avg/max/mdev = 13.761/13.857/14.002/0.104 ms

traceroute to 104.21.235.52 (104.21.235.52), 30 hops max, 60 byte packets 1 gateway (172.31.1.1) 2.862 ms 3.134 ms 3.185 ms 2 19566.your-cloud.host (168.119.217.206) 0.670 ms 0.755 ms 0.819 ms 3 * * * 4 * * * 5 core-spine-rdev2.cloud1.nbg1.hetzner.com (213.239.239.122) 1.611 ms core-spine-rdev1.cloud1.nbg1.hetzner.com (213.239.203.102) 1.616 ms 1.647 ms 6 core11.nbg1.hetzner.com (213.239.239.121) 1.986 ms core11.nbg1.hetzner.com (213.239.203.101) 0.378 ms 0.538 ms 7 core6.par.hetzner.com (213.239.237.238) 13.065 ms core6.par.hetzner.com (213.239.237.242) 13.056 ms 13.192 ms 8 static.2.248.47.78.clients.your-server.de (78.47.248.2) 14.526 ms static.6.248.47.78.clients.your-server.de (78.47.248.6) 14.181 ms static.2.248.47.78.clients.your-server.de (78.47.248.2) 14.183 ms 9 141.101.67.93 (141.101.67.93) 22.124 ms 141.101.67.73 (141.101.67.73) 14.024 ms 141.101.67.69 (141.101.67.69) 14.316 ms 10 104.21.235.52 (104.21.235.52) 13.927 ms 13.924 ms 13.777 ms

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