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:      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 5,508,246 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
104.21.80.1	worldtimebuddy.com	310486
104.21.81.235	dotname.co.kr	10352
104.21.82.157	bytebridge.io	3048
104.21.94.66	crigne.com	2379
104.21.85.199	aajkaltrends.club	2101
104.21.88.116	gift-me.net	2033
104.21.82.126	achinhngach.vn	1940
104.21.95.240	betmotion.com	1805
104.21.87.230	scoredit.com	1803
104.21.90.184	hurak.co.uk	1784
104.21.87.158	filecroco.com	1722
104.21.84.96	btcspinner.io	1689
104.21.88.220	gaoqing.la	1687
104.21.80.187	nasatheme.com	1681
104.21.93.231	oldhousedreams.com	1672
104.21.89.88	llpgpro.com	1645
104.21.91.158	embedy.eu	1633
104.21.85.125	kensirou.com	1630
104.21.83.5	meetlovemate.top	1611
104.21.83.114	greenfo.hu	1610

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
104.21.90.170	AS13335 Cloudflare, Inc.	`0.13ms` from Brisbane, AU
104.21.93.87	AS13335 Cloudflare, Inc.	`0.13ms` from Yerevan, AM
104.21.83.195	AS13335 Cloudflare, Inc.	`0.13ms` from Johannesburg, ZA
104.21.85.57	AS13335 Cloudflare, Inc.	`0.13ms` from Yerevan, AM
104.21.80.198	AS13335 Cloudflare, Inc.	`0.13ms` from Yerevan, AM
104.21.81.235	AS13335 Cloudflare, Inc.	`0.13ms` from Brisbane, AU
104.21.94.2	AS13335 Cloudflare, Inc.	`0.13ms` from Yerevan, AM
104.21.84.55	AS13335 Cloudflare, Inc.	`0.13ms` from Yerevan, AM
104.21.91.233	AS13335 Cloudflare, Inc.	`0.13ms` from Yerevan, AM
104.21.82.106	AS13335 Cloudflare, Inc.	`0.13ms` from Yerevan, AM
104.21.92.56	AS13335 Cloudflare, Inc.	`0.13ms` from Yerevan, AM
104.21.89.137	AS13335 Cloudflare, Inc.	`0.13ms` from Brisbane, AU
104.21.95.250	AS13335 Cloudflare, Inc.	`0.14ms` from Yerevan, AM
104.21.86.115	AS13335 Cloudflare, Inc.	`0.13ms` from Brisbane, AU
104.21.88.31	AS13335 Cloudflare, Inc.	`0.13ms` from Brisbane, AU
104.21.87.22	AS13335 Cloudflare, Inc.	`0.14ms` 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
192.145.74.84	AS134743 Anycast Holdings Pty Ltd	`4.01ms` from Adelaide, AU
62.250.139.244	AS50266 Odido Netherlands B.V.	`6.38ms` from Amsterdam, NL
101.24.138.212	AS4837 CHINA UNICOM China169 Backbone	`8.11ms` from Beijing, CN
191.202.80.212	AS26599 TELEFÔNICA BRASIL S.A	`13.40ms` from Belo Horizonte, BR
52.24.113.196	AS16509 Amazon.com, Inc.	`0.16ms` from Boardman, US
139.212.158.116	AS4837 CHINA UNICOM China169 Backbone	`2.56ms` from Changchun, CN
204.87.170.4	AS398927 Francis Tuttle Technology Center School District #21	`7.48ms` from Kansas City, US
97.202.152.84	AS6167 Verizon Business	`14.70ms` from Los Angeles, US
67.189.107.52	AS7922 Comcast Cable Communications, LLC	`5.23ms` from Portland, US
13.221.117.4	AS14618 Amazon.com, Inc.	`0.38ms` from Reston, US
67.183.2.148	AS7922 Comcast Cable Communications, LLC	`4.74ms` from Seattle, US
126.153.3.228	AS17676 SoftBank Corp.	`3.53ms` from Tokyo, JP
89.72.103.36	AS9141 P4 Sp. z o.o.	`12.72ms` from Warsaw, PL
44.247.9.20	AS16509 Amazon.com, Inc.	`0.31ms` from Boardman, US
46.214.158.132	AS48161 NEXTGEN COMMUNICATIONS SRL	`8.86ms` from Bucharest, RO
117.173.20.100	AS9808 China Mobile Communications Group Co., Ltd.	`6.49ms` from Chengdu, CN
24.92.135.164	AS10796 Charter Communications Inc	`9.12ms` from Columbus, US
1.54.43.52	AS18403 FPT Telecom Company	`1.75ms` from Ho Chi Minh City, VN
14.172.15.164	AS45899 VNPT Corp	`2.91ms` from Ho Chi Minh City, VN
54.46.11.84	AS16509 Amazon.com, Inc.	`0.62ms` from Hong Kong, HK
95.177.7.36	AS3257 GTT Communications Inc.	`13.71ms` from London, GB
153.244.204.164	AS4713 NTT DOCOMO BUSINESS,Inc.	`11.92ms` from Osaka, JP
45.183.193.4	AS269306 PAULO HENRIQUE SOARES DE SOUZA	`7.55ms` from Osasco, BR
172.69.211.68	AS13335 Cloudflare, Inc.	`0.18ms` from Palermo, IT
93.21.77.164	AS15557 Societe Francaise Du Radiotelephone - SFR SA	`7.04ms` from Paris, FR

Traceroute

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

traceroute -a -n -q1 -f4 104.21.82.26

traceroute to 104.21.82.26 (104.21.82.26): 64 hops max, 52 byte packets

4 [AS13335] 172.69.220.2 0.633 ms

5 [AS13335] 104.21.82.26 0.167 ms

Measurement taken from

IPinfo ProbeNet in Luxembourg, LU

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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