104.21.64.0/20

AS13335 · Cloudflare, Inc.

Need more data or want to access it via API or data downloads? Sign up to get free access

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:        [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:      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:      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 5,523,247 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
104.21.64.1	drctcldfa.com	203832
104.21.68.107	vfxdownload.net	10629
104.21.67.180	radioactu.com	8928
104.21.74.63	qaqooking.wiki	4122
104.21.78.219	pres.cafe	3835
104.21.73.54	shimejis.xyz	2878
104.21.71.219	lemonstheplay.co.uk	2699
104.21.79.89	sexstories-incest.com	2056
104.21.68.45	top5onlinegames.com	1943
104.21.74.100	upscale.cash	1846
104.21.74.5	sharebazarnews.com	1803
104.21.71.79	femin.online	1774
104.21.68.73	v2ny.com	1691
104.21.74.42	eromanga-castle.com	1676
104.21.68.28	lowcodelewis.com	1652
104.21.66.223	orevalighting.com	1636
104.21.65.37	addyoutube.com	1597
104.21.71.195	infekt.ws	1593
104.21.64.249	samsunhaber.com	1564
104.21.76.231	fuccunt.com	1554

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
104.21.72.20	AS13335 Cloudflare, Inc.	`0.13ms` from Lisbon, PT
104.21.74.111	AS13335 Cloudflare, Inc.	`0.13ms` from Yerevan, AM
104.21.73.40	AS13335 Cloudflare, Inc.	`0.12ms` from Lisbon, PT
104.21.66.23	AS13335 Cloudflare, Inc.	`0.12ms` from Yerevan, AM
104.21.78.171	AS13335 Cloudflare, Inc.	`0.13ms` from Lisbon, PT
104.21.65.104	AS13335 Cloudflare, Inc.	`0.12ms` from Lisbon, PT
104.21.67.248	AS13335 Cloudflare, Inc.	`0.13ms` from Lisbon, PT
104.21.64.63	AS13335 Cloudflare, Inc.	`0.12ms` from Lisbon, PT
104.21.79.119	AS13335 Cloudflare, Inc.	`0.13ms` from Lisbon, PT
104.21.77.158	AS13335 Cloudflare, Inc.	`0.13ms` from Lisbon, PT
104.21.76.90	AS13335 Cloudflare, Inc.	`0.13ms` from Yerevan, AM
104.21.71.188	AS13335 Cloudflare, Inc.	`0.13ms` from Yerevan, AM
104.21.68.78	AS13335 Cloudflare, Inc.	`0.13ms` from Lisbon, PT
104.21.75.100	AS13335 Cloudflare, Inc.	`0.12ms` from Yerevan, AM
104.21.70.213	AS13335 Cloudflare, Inc.	`0.13ms` from Yerevan, AM
104.21.69.3	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
147.229.252.116	AS197451 Brno University of Technology	`0.25ms` from Brno, CZ
91.54.146.148	AS3320 Deutsche Telekom AG	`1.71ms` from Frankfurt am Main, DE
217.255.99.228	AS3320 Deutsche Telekom AG	`2.51ms` from Frankfurt am Main, DE
139.162.129.244	AS63949 Akamai Connected Cloud	`0.17ms` from Frankfurt am Main, DE
187.201.199.52	AS8151 UNINET	`7.13ms` from Guadalajara, MX
195.219.248.132	AS6453 TATA COMMUNICATIONS (AMERICA) INC	`4.00ms` from London, GB
217.32.156.164	AS6871 Plusnet	`5.04ms` from London, GB
47.192.82.68	AS5650 Frontier Communications of America, Inc.	`10.91ms` from Miami, US
79.143.239.228	AS8359 MTS PJSC	`12.29ms` from Moscow, RU
38.42.181.68	AS27611 Starry, Inc.	`11.33ms` from New York City, US
73.35.127.84	AS7922 Comcast Cable Communications, LLC	`8.00ms` from Orlando, US
58.70.66.180	AS17511 OPTAGE Inc.	`1.93ms` from Osaka, JP
23.57.6.68	AS16625 Akamai Technologies, Inc.	`0.73ms` from Paris, FR
90.87.8.4	AS3215 Orange S.A.	`2.01ms` from Paris, FR
20.19.209.116	AS8075 Microsoft Corporation	`0.20ms` from Paris, FR
157.143.189.180	AS8399 SEWAN SAS	`0.65ms` from Paris, FR
175.195.120.84	AS4766 Korea Telecom	`1.50ms` from Seoul, KR
121.16.83.164	AS4837 CHINA UNICOM China169 Backbone	`8.47ms` from Tianjin, CN
203.146.0.20	AS4750 CS LOXINFO PUBLIC COMPANY LIMITED	`0.53ms` from Bangkok, TH
66.70.192.196	AS16276 OVH SAS	`0.09ms` from Beauharnois, CA
62.193.106.148	AS36992 ETISALAT MISR	`9.12ms` from Cairo, EG
86.159.9.20	AS2856 British Telecommunications PLC	`6.11ms` from London, GB
212.171.221.100	AS3269 Telecom Italia S.p.A.	`6.85ms` from Naples, IT
201.106.101.36	AS8151 UNINET	`3.96ms` from Santiago de Queretaro, MX
59.19.203.228	AS4766 Korea Telecom	`7.36ms` from Seoul, KR

Traceroute

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

traceroute -a -n -q1 -f3 104.21.72.175

traceroute to 104.21.72.175 (104.21.72.175): 64 hops max, 52 byte packets

3 [AS513] 192.65.185.228 0.787 ms

4 [AS13335] 104.21.72.175 0.197 ms

Measurement taken from

IPinfo ProbeNet in Geneve, CH

On November 28th 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.

An API built with users in mind: reliable, accurate, and easy-to-use

Discover why industry-leading companies around the globe love our data. IPinfo's accurate insights fuel use cases from cybersecurity, data enrichment, web personalization, and much more.

Get Started for Free Contact Sales