104.21.64.0/20

AS13335 · Cloudflare, Inc.

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Summary

Country	United States
Domain	cloudflare.com
ASN	AS13335
Registry	ARIN
ID	CLOUDFLARENET

WHOIS Details

NetHandle:      NET-104-16-0-0-1
OrgID:          CLOUD14
Parent:         NET-104-0-0-0-0
NetName:        CLOUDFLARENET
NetRange:       104.16.0.0 - 104.31.255.255
NetType:        allocation
Comment:        All Cloudflare abuse reporting can be done via https://www.cloudflare.com/abuse
Comment:        Geofeed: https://api.cloudflare.com/local-ip-ranges.csv
RegDate:        2014-03-28
Updated:        2024-09-04
TechHandle:     ADMIN2521-ARIN
AbuseHandle:    ABUSE2916-ARIN
NOCHandle:      NOC11962-ARIN
Source:         ARIN


OrgID:          CLOUD14
OrgName:        Cloudflare, Inc.
CanAllocate:    
Street:         101 Townsend Street
City:           San Francisco
State/Prov:     CA
Country:        US
PostalCode:     94107
RegDate:        2010-07-09
Updated:        2024-11-25
OrgAdminHandle: ADMIN2521-ARIN
OrgTechHandle:  ADMIN2521-ARIN
OrgAbuseHandle: ABUSE2916-ARIN
OrgNOCHandle:   CLOUD146-ARIN
OrgRoutingHandle:   CLOUD146-ARIN
Source:         ARIN


POCHandle:      CLOUD146-ARIN
IsRole:         Y
LastName:       Cloudflare-NOC
FirstName:      
Street:         101 Townsend St
City:           San Francsico
State/Prov:     CA
Country:        US
PostalCode:     94107
RegDate:        2021-07-01
Updated:        2025-08-20
OfficePhone:    +1-650-319-8930
Mailbox:        noc@cloudflare.com
Source:         ARIN


POCHandle:      NOC11962-ARIN
IsRole:         Y
LastName:       NOC
FirstName:      
Street:         101 Townsend Street
City:           San Francisco
State/Prov:     CA
Country:        US
PostalCode:     94107
RegDate:        2011-04-19
Updated:        2025-03-12
OfficePhone:    +1-650-319-8930
Mailbox:        noc@cloudflare.com
Source:         ARIN


POCHandle:      ABUSE2916-ARIN
IsRole:         Y
LastName:       Abuse
FirstName:      
Street:         101 Townsend Street
City:           San Francisco
State/Prov:     CA
Country:        US
PostalCode:     94107
RegDate:        2011-02-14
Updated:        2024-09-04
OfficePhone:    +1-650-319-8930
Mailbox:        abuse@cloudflare.com
Source:         ARIN


POCHandle:      ADMIN2521-ARIN
IsRole:         Y
LastName:       Admin
FirstName:      
Street:         101 Townsend Street
City:           San Francisco
State/Prov:     CA
Country:        US
PostalCode:     94107
RegDate:        2011-04-19
Updated:        2025-06-12
OfficePhone:    +1-650-319-8930
Mailbox:        rir@cloudflare.com
Source:         ARIN

Nearby Ranges

BGP prefixes that overlap with 104.21.0.0/16

No nearby ranges found.

Hosted domains

There are 5,507,464 domain names hosted across 4,051 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
104.21.68.107	vfxdownload.net	10700
104.21.74.63	qaqooking.wiki	4348
104.21.78.219	pres.cafe	3712
104.21.64.80	faucetoshi.com	2665
104.21.71.219	lemonstheplay.co.uk	2645
104.21.75.114	gdrplayers.it	2140
104.21.79.89	sexstories-incest.com	2002
104.21.70.69	latestrags.com	1980
104.21.70.215	sxnarod.com	1938
104.21.65.46	hotelaah.com	1783
104.21.78.31	sislinfotech.com	1777
104.21.74.100	upscale.cash	1776
104.21.75.110	xxxvideo.link	1758
104.21.76.77	99re9145.xyz	1698
104.21.68.28	lowcodelewis.com	1615
104.21.75.9	futurock.fm	1610
104.21.77.53	cenesuplemenata.rs	1598
104.21.71.215	outagedown.com	1580
104.21.75.96	weav.xyz	1548
104.21.68.73	v2ny.com	1540

Hosted domains API

Our Hosted Domains API, or Reverse IP API returns a full list of domains that are hosted on a single IP address.

Useful for Cybersecurity

Read more

Pingable IPs

4,096 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address	ASN	Details
104.21.73.122	AS13335 Cloudflare, Inc.	`0.13ms` from Yerevan, AM
104.21.69.45	AS13335 Cloudflare, Inc.	`0.13ms` from Yerevan, AM
104.21.68.59	AS13335 Cloudflare, Inc.	`0.14ms` from Brisbane, AU
104.21.76.200	AS13335 Cloudflare, Inc.	`0.14ms` from Yerevan, AM
104.21.72.191	AS13335 Cloudflare, Inc.	`0.13ms` from Yerevan, AM
104.21.65.244	AS13335 Cloudflare, Inc.	`0.13ms` from Yerevan, AM
104.21.70.123	AS13335 Cloudflare, Inc.	`0.13ms` from Yerevan, AM
104.21.74.231	AS13335 Cloudflare, Inc.	`0.12ms` from Yerevan, AM
104.21.78.44	AS13335 Cloudflare, Inc.	`0.13ms` from Auckland, NZ
104.21.75.140	AS13335 Cloudflare, Inc.	`0.12ms` from Yerevan, AM
104.21.71.188	AS13335 Cloudflare, Inc.	`0.14ms` from Brisbane, AU
104.21.77.109	AS13335 Cloudflare, Inc.	`0.13ms` from Yerevan, AM
104.21.79.123	AS13335 Cloudflare, Inc.	`0.13ms` from Yerevan, AM
104.21.66.86	AS13335 Cloudflare, Inc.	`0.13ms` from Brisbane, AU
104.21.64.155	AS13335 Cloudflare, Inc.	`0.13ms` from Auckland, NZ
104.21.67.119	AS13335 Cloudflare, Inc.	`0.13ms` from Yerevan, AM

Other Pingable IPs

Below is a random selection of 25 IPs that replied to an ICMP ping during our most recent internet scan.

IP Address	ASN	Details
178.59.125.52	AS3329 VODAFONE-PANAFON HELLENIC TELECOMMUNICATIONS COMPANY SA	`1.07ms` from Athens, GR
76.97.69.52	AS7922 Comcast Cable Communications, LLC	`4.01ms` from Atlanta, US
191.85.212.36	AS22927 Telefonica de Argentina	`9.62ms` from Buenos Aires, AR
130.250.43.36	AS394901 NEW CCH, LLC	`5.13ms` from Dallas, US
47.239.3.100	AS45102 Alibaba (US) Technology Co., Ltd.	`0.90ms` from Hong Kong, HK
113.227.238.116	AS4837 CHINA UNICOM China169 Backbone	`8.17ms` from Liaoyang, CN
90.218.222.4	AS5607 Sky UK Limited	`10.19ms` from London, GB
119.209.224.52	AS4766 Korea Telecom	`2.66ms` from Seoul, KR
122.117.254.36	AS3462 Data Communication Business Group	`5.31ms` from Taichung, TW
113.154.137.100	AS2516 KDDI CORPORATION	`7.17ms` from Tokyo, JP
20.162.85.212	AS8075 Microsoft Corporation	`0.18ms` from Cardiff, GB
14.189.178.228	AS45899 VNPT Corp	`8.99ms` from Da Nang, VN
20.67.226.36	AS8075 Microsoft Corporation	`0.17ms` from Dublin, IE
113.175.230.36	AS45899 VNPT Corp	`2.45ms` from Hanoi, VN
69.7.181.132	AS13767 DataBank Holdings, Ltd.	`0.58ms` from Houston, US
82.133.98.36	AS13285 TalkTalk Communications Limited	`8.55ms` from London, GB
49.193.4.68	AS4804 Microplex PTY LTD	`2.82ms` from Melbourne, AU
20.14.83.52	AS8075 Microsoft Corporation	`0.50ms` from Phoenix, US
140.84.186.244	AS31898 Oracle Corporation	`0.14ms` from Santiago de Queretaro, MX
60.86.250.68	AS17676 SoftBank Corp.	`2.71ms` from Tokyo, JP
120.74.146.164	AS2527 Sony Network Communications Inc.	`15.79ms` from Tokyo, JP
85.237.30.52	AS29056 Citycom Telekommunikation GmbH	`3.79ms` from Vienna, AT
185.242.33.4	AS15391 Sysclay Sp. z o. o.	`0.64ms` from Warsaw, PL
149.51.60.244	AS7018 AT&T Enterprises, LLC	`1.20ms` from Ashburn, US
176.191.178.164	AS5410 Bouygues Telecom SA	`5.17ms` from Aubervilliers, FR

Traceroute

Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this range. Learn more.

traceroute -a -n -q1 -f5 104.21.79.213

traceroute to 104.21.79.213 (104.21.79.213): 64 hops max, 52 byte packets

5 [AS8932] 185.48.241.27 0.825 ms

6 [AS13335] 104.21.79.213 0.164 ms

Measurement taken from

IPinfo ProbeNet in Yerevan, AM

On October 25th 2025

What are IP address ranges?

IP address ranges, or netblocks, are groups of related IP addresses. They are usually represented as a base IP address, followed by a slash, and then a netmask which represents how many IP addresses are contained within the netblock. This format is known as CIDR. You'll also sometimes see netblocks given as a start ip address, and an end ip address, or an ip address range.

Traffic works its way around the internet based on the routing table, which contains a list of networks and their associated netblocks.

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