104.21.80.0/20

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:      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:        [email protected]
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:        [email protected]
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:        [email protected]
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:        [email protected]
Source:         ARIN

Nearby Ranges

BGP prefixes that overlap with 104.21.0.0/16

No nearby ranges found.

Hosted domains

There are 5,689,561 domain names hosted across 4,050 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
104.21.90.107	srstop.link	3580
104.21.82.218	thep431.cc	3329
104.21.82.157	bytebridge.io	3167
104.21.80.187	nasatheme.com	2667
104.21.85.68	flobflower.com	2242
104.21.82.126	achinhngach.vn	2199
104.21.89.116	myschooldm.com	2177
104.21.85.199	aajkaltrends.club	2174
104.21.83.113	skynet.com.my	2134
104.21.80.5	hentaibros.com	1915
104.21.88.220	gaoqing.la	1886
104.21.82.219	avozdaserra.com.br	1880
104.21.87.230	scoredit.com	1850
104.21.92.191	anidl.org	1836
104.21.93.231	oldhousedreams.com	1798
104.21.87.158	filecroco.com	1769
104.21.84.96	btcspinner.io	1744
104.21.89.161	kinozal.tv	1733
104.21.80.221	wm55.co	1725
104.21.83.5	meetlovemate.top	1699

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
104.21.90.183	AS13335 Cloudflare, Inc.	`0.11ms` from Wrocław, PL
104.21.80.208	AS13335 Cloudflare, Inc.	`0.11ms` from Wrocław, PL
104.21.93.34	AS13335 Cloudflare, Inc.	`0.10ms` from Wrocław, PL
104.21.91.246	AS13335 Cloudflare, Inc.	`0.11ms` from Wrocław, PL
104.21.88.36	AS13335 Cloudflare, Inc.	`0.10ms` from Wrocław, PL
104.21.85.224	AS13335 Cloudflare, Inc.	`0.11ms` from Wrocław, PL
104.21.94.40	AS13335 Cloudflare, Inc.	`0.11ms` from Wrocław, PL
104.21.92.203	AS13335 Cloudflare, Inc.	`0.11ms` from Wrocław, PL
104.21.86.212	AS13335 Cloudflare, Inc.	`0.10ms` from Wrocław, PL
104.21.82.69	AS13335 Cloudflare, Inc.	`0.11ms` from Wrocław, PL
104.21.95.43	AS13335 Cloudflare, Inc.	`0.11ms` from Wrocław, PL
104.21.87.19	AS13335 Cloudflare, Inc.	`0.11ms` from Wrocław, PL
104.21.84.174	AS13335 Cloudflare, Inc.	`0.11ms` from Wrocław, PL
104.21.83.210	AS13335 Cloudflare, Inc.	`0.10ms` from Wrocław, PL
104.21.81.215	AS13335 Cloudflare, Inc.	`0.11ms` from Wrocław, PL
104.21.89.2	AS13335 Cloudflare, Inc.	`0.11ms` from Wrocław, PL

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
3.22.131.244	AS16509 Amazon.com, Inc.	`0.17ms` from Columbus, US
52.208.41.4	AS16509 Amazon.com, Inc.	`0.17ms` from Dublin, IE
115.77.43.100	AS7552 Viettel Group	`3.28ms` from Ho Chi Minh City, VN
204.185.82.4	AS2572 University of Missouri - dba the Missouri Research and Education Network (MOREnet)	`0.34ms` from Kansas City, US
188.159.235.228	AS34779 T-2, d.o.o.	`1.58ms` from Ljubljana, SI
47.7.192.164	AS20115 Charter Communications LLC	`6.96ms` from Minneapolis, US
112.31.107.20	AS9808 China Mobile Communications Group Co., Ltd.	`6.35ms` from Nanjing, CN
103.1.228.68	AS17766 Nexon Asia Pacific Pty Ltd	`0.61ms` from Perth, AU
109.108.206.52	AS49455 Telia Norge AS	`9.27ms` from Sandefjord, NO
104.238.153.20	AS20473 The Constant Company, LLC	`0.16ms` from Seattle, US
54.206.223.52	AS16509 Amazon.com, Inc.	`0.11ms` from Sydney, AU
223.217.143.132	AS4713 NTT DOCOMO BUSINESS,Inc.	`3.63ms` from Tokyo, JP
172.86.156.36	AS400781 XenTegra Connect	`0.80ms` from Atlanta, US
123.117.124.196	AS4808 China Unicom Beijing Province Network	`3.51ms` from Beijing, CN
40.176.16.148	AS16509 Amazon.com, Inc.	`1.62ms` from Calgary, CA
41.10.101.148	AS36994 Vodacom	`2.88ms` from Cape Town, ZA
12.174.67.212	AS7018 AT&T Enterprises, LLC	`5.53ms` from Columbus, US
62.214.254.100	AS8881 1&1 Versatel GmbH	`1.93ms` from Hamburg, DE
113.225.141.116	AS4837 CHINA UNICOM China169 Backbone	`8.29ms` from Liaoyang, CN
75.223.240.52	AS6167 Verizon Business	`8.66ms` from Los Angeles, US
86.216.237.196	AS3215 Orange S.A.	`2.98ms` from Marseille, FR
2.4.80.164	AS3215 Orange S.A.	`7.55ms` from Marseille, FR
47.205.246.212	AS5650 Frontier Communications of America, Inc.	`6.17ms` from Miami, US
151.48.202.164	AS1267 WIND TRE S.P.A.	`2.77ms` from Milan, IT
173.21.166.100	AS30036 Mediacom Communications Corp	`10.97ms` from Minneapolis, US

Traceroute

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

traceroute -a -n -q1 104.21.88.24

traceroute to 104.21.88.24 (104.21.88.24): 64 hops max, 52 byte packets

1 [AS35179] 83.168.71.253 0.253 ms

2 *

3 [AS13335] 104.21.88.24 0.134 ms

Measurement taken from

IPinfo ProbeNet in Wrocław, PL

On December 6th 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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