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:      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


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:      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:      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

Nearby Ranges

BGP prefixes that overlap with 104.21.0.0/16

No nearby ranges found.

Hosted domains

There are 5,684,888 domain names hosted across 4,052 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
104.21.64.1	drctcldfa.com	192115
104.21.76.65	unissula.ac.id	4230
104.21.74.63	qaqooking.wiki	4152
104.21.78.219	pres.cafe	3856
104.21.64.80	faucetoshi.com	2944
104.21.73.54	shimejis.xyz	2939
104.21.70.69	latestrags.com	2073
104.21.68.45	top5onlinegames.com	2015
104.21.75.110	xxxvideo.link	1848
104.21.65.46	hotelaah.com	1831
104.21.66.4	holopirates.moe	1820
104.21.77.127	lesfm.net	1817
104.21.76.77	imediastores.com	1767
104.21.75.9	futurock.fm	1711
104.21.71.215	outagedown.com	1693
104.21.68.28	lowcodelewis.com	1690
104.21.74.42	eromanga-castle.com	1676
104.21.66.56	cheap-comics.com	1667
104.21.75.96	weav.xyz	1656
104.21.65.37	addyoutube.com	1652

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
104.21.73.201	AS13335 Cloudflare, Inc.	`0.11ms` from Wrocław, PL
104.21.79.60	AS13335 Cloudflare, Inc.	`0.11ms` from Wrocław, PL
104.21.72.37	AS13335 Cloudflare, Inc.	`0.11ms` from Wrocław, PL
104.21.65.20	AS13335 Cloudflare, Inc.	`0.11ms` from Wrocław, PL
104.21.78.71	AS13335 Cloudflare, Inc.	`0.11ms` from Wrocław, PL
104.21.74.65	AS13335 Cloudflare, Inc.	`0.11ms` from Wrocław, PL
104.21.71.161	AS13335 Cloudflare, Inc.	`0.11ms` from Wrocław, PL
104.21.67.191	AS13335 Cloudflare, Inc.	`0.11ms` from Wrocław, PL
104.21.69.178	AS13335 Cloudflare, Inc.	`0.11ms` from Wrocław, PL
104.21.64.119	AS13335 Cloudflare, Inc.	`0.11ms` from Wrocław, PL
104.21.68.16	AS13335 Cloudflare, Inc.	`0.11ms` from Wrocław, PL
104.21.75.179	AS13335 Cloudflare, Inc.	`0.11ms` from Wrocław, PL
104.21.76.238	AS13335 Cloudflare, Inc.	`0.10ms` from Wrocław, PL
104.21.70.93	AS13335 Cloudflare, Inc.	`0.10ms` from Wrocław, PL
104.21.77.140	AS13335 Cloudflare, Inc.	`0.11ms` from Wrocław, PL
104.21.66.207	AS13335 Cloudflare, Inc.	`0.10ms` 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
31.187.250.196	AS50266 Odido Netherlands B.V.	`4.02ms` from Amsterdam, NL
70.109.174.36	AS13977 Fidium	`2.31ms` from Boston, US
124.105.105.180	AS9299 Philippine Long Distance Telephone Company	`1.60ms` from Manila, PH
209.155.222.68	AS7029 Windstream Communications LLC	`4.04ms` from Miami, US
137.184.23.20	AS14061 DigitalOcean, LLC	`0.25ms` from New York City, US
180.17.156.196	AS4713 NTT DOCOMO BUSINESS,Inc.	`4.43ms` from Osaka, JP
60.44.142.228	AS4713 NTT DOCOMO BUSINESS,Inc.	`17.31ms` from Osaka, JP
58.58.209.4	AS4134 CHINANET-BACKBONE	`5.66ms` from Qingdao, CN
27.203.17.132	AS4837 CHINA UNICOM China169 Backbone	`11.22ms` from Qingdao, CN
171.64.19.20	AS32 Stanford University	`1.84ms` from San Jose, US
114.38.0.132	AS3462 Data Communication Business Group	`1.16ms` from Taichung, TW
40.81.219.4	AS8075 Microsoft Corporation	`0.14ms` from Tokyo, JP
190.206.6.132	AS8048 CANTV Servicios, Venezuela	`18.52ms` from Willemstad, CW
190.207.63.4	AS8048 CANTV Servicios, Venezuela	`11.36ms` from Willemstad, CW
5.38.221.100	AS5483 Magyar Telekom Plc.	`0.98ms` from Budapest, HU
105.73.5.36	AS36884 Wana Corporate	`10.08ms` from Casablanca, MA
23.11.180.180	AS16625 Akamai Technologies, Inc.	`0.58ms` from Melbourne, AU
70.163.178.68	AS22773 Cox Communications Inc.	`5.62ms` from Phoenix, US
63.192.100.4	AS7018 AT&T Enterprises, LLC	`12.19ms` from Redding, US
182.31.110.36	AS9694 Seokyung Cable Television Co.. Ltd.	`9.04ms` from Seoul, KR
203.187.90.4	AS9416 Hoshin Multimedia Center Inc.	`2.10ms` from Taipei, TW
85.237.30.52	AS29056 Citycom Telekommunikation GmbH	`3.32ms` from Vienna, AT
20.229.121.84	AS8075 Microsoft Corporation	`0.29ms` from Amsterdam, NL
3.70.15.116	AS16509 Amazon.com, Inc.	`0.30ms` from Frankfurt am Main, DE
81.111.94.68	AS5089 Virgin Media Limited	`3.96ms` from London, GB

Traceroute

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

traceroute -a -n -q1 104.21.69.65

traceroute to 104.21.69.65 (104.21.69.65): 64 hops max, 52 byte packets

1 [AS35179] 83.168.71.253 0.144 ms

2 *

3 [AS13335] 104.21.69.65 0.133 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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