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:      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:      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

Nearby Ranges

BGP prefixes that overlap with 104.21.0.0/16

No nearby ranges found.

Hosted domains

There are 5,527,299 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
104.21.81.235	dotname.co.kr	10095
104.21.87.10	kora-shoot.com	7391
104.21.90.107	srstop.link	3504
104.21.91.25	111cn.net	3373
104.21.82.218	thep431.cc	3289
104.21.82.157	bytebridge.io	3099
104.21.94.66	crigne.com	2259
104.21.82.126	achinhngach.vn	2139
104.21.85.199	aajkaltrends.club	2133
104.21.89.116	gimy.cc	2123
104.21.90.184	produceshop.it	1876
104.21.82.219	avozdaserra.com.br	1826
104.21.95.240	betmotion.com	1815
104.21.92.191	anidl.org	1787
104.21.82.223	sexxx.wang	1769
104.21.93.231	oldhousedreams.com	1743
104.21.91.158	embedy.eu	1719
104.21.84.96	btcspinner.io	1712
104.21.80.221	wm55.co	1706
104.21.89.161	kinozal.tv	1687

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
104.21.83.171	AS13335 Cloudflare, Inc.	`0.13ms` from Lisbon, PT
104.21.80.156	AS13335 Cloudflare, Inc.	`0.13ms` from Yerevan, AM
104.21.95.173	AS13335 Cloudflare, Inc.	`0.12ms` from Yerevan, AM
104.21.90.244	AS13335 Cloudflare, Inc.	`0.13ms` from Lisbon, PT
104.21.88.217	AS13335 Cloudflare, Inc.	`0.12ms` from Yerevan, AM
104.21.87.205	AS13335 Cloudflare, Inc.	`0.13ms` from Lisbon, PT
104.21.81.231	AS13335 Cloudflare, Inc.	`0.13ms` from Yerevan, AM
104.21.93.166	AS13335 Cloudflare, Inc.	`0.13ms` from Yerevan, AM
104.21.91.27	AS13335 Cloudflare, Inc.	`0.14ms` from Yerevan, AM
104.21.92.255	AS13335 Cloudflare, Inc.	`0.13ms` from Lisbon, PT
104.21.85.129	AS13335 Cloudflare, Inc.	`0.13ms` from Lisbon, PT
104.21.84.33	AS13335 Cloudflare, Inc.	`0.12ms` from Lisbon, PT
104.21.82.105	AS13335 Cloudflare, Inc.	`0.11ms` from Lisbon, PT
104.21.94.194	AS13335 Cloudflare, Inc.	`0.13ms` from Lisbon, PT
104.21.86.189	AS13335 Cloudflare, Inc.	`0.13ms` from Lisbon, PT
104.21.89.117	AS13335 Cloudflare, Inc.	`0.12ms` 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
154.254.155.132	AS36947 Telecom Algeria	`12.55ms` from Algiers, DZ
98.163.30.4	AS22773 Cox Communications Inc.	`4.99ms` from Ashburn, US
49.232.153.116	AS45090 Shenzhen Tencent Computer Systems Company Limited	`1.92ms` from Beijing, CN
111.205.5.84	AS4808 China Unicom Beijing Province Network	`3.32ms` from Beijing, CN
20.191.60.164	AS8075 Microsoft Corporation	`0.15ms` from Dublin, IE
217.236.136.36	AS3320 Deutsche Telekom AG	`4.40ms` from Duesseldorf, DE
24.222.175.244	AS11260 EastLink	`18.89ms` from Edmonton, CA
149.71.35.20	AS151636 Reliance Broadband	`2.68ms` from Islamabad, PK
94.176.96.4	AS207645 F & W Networks Ltd	`0.35ms` from London, GB
77.229.54.20	AS12430 VODAFONE ESPANA S.A.U.	`7.83ms` from Madrid, ES
143.20.96.36	AS135402 Flamehosting	`0.86ms` from Moscow, RU
37.48.251.244	AS50340 JSC Selectel	`0.71ms` from Moscow, RU
93.127.168.52	AS47583 Hostinger International Limited	`0.28ms` from Mumbai, IN
74.68.65.148	AS12271 Charter Communications Inc	`4.31ms` from New York City, US
103.48.32.52	AS54103 MOD Mission Critical, LLC	`0.62ms` from New York City, US
126.145.137.212	AS17676 SoftBank Corp.	`3.98ms` from Osaka, JP
32.217.175.196	AS46690 Southern New England Telephone Company and SNET America, Inc.	`3.57ms` from Secaucus, US
66.77.174.148	AS209 CenturyLink Communications, LLC	`19.09ms` from Chicago, US
34.162.175.244	AS396982 Google LLC	`0.15ms` from Columbus, US
108.59.83.20	AS396982 Google LLC	`0.13ms` from Council Bluffs, US
182.152.9.132	AS17924 SmarTone Mobile Communications Ltd	`17.17ms` from Hong Kong, HK
106.221.112.196	AS45609 Bharti Airtel Ltd. AS for GPRS Service	`15.52ms` from Kolkata, IN
1.7.83.4	AS9583 Sify Limited	`0.86ms` from Kolkata, IN
143.234.194.244	AS786 Jisc Services Limited	`12.13ms` from London, GB
87.222.1.180	AS12479 Orange Espagne SA	`7.98ms` from Madrid, ES

Traceroute

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

traceroute -a -n -q1 -f2 104.21.91.117

traceroute to 104.21.91.117 (104.21.91.117): 64 hops max, 52 byte packets

2 [] 103.225.171.35 0.867 ms

3 [AS13335] 104.21.91.117 0.571 ms

Measurement taken from

IPinfo ProbeNet in Denpasar, ID

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.

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