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:      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


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

Nearby Ranges

BGP prefixes that overlap with 104.21.0.0/16

No nearby ranges found.

Hosted domains

There are 5,673,817 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	9854
104.21.91.25	111cn.net	3498
104.21.80.187	nasatheme.com	2735
104.21.85.68	guyyil.store	2238
104.21.94.66	crigne.com	2186
104.21.89.116	myschooldm.com	2178
104.21.88.116	gift-me.net	2139
104.21.83.113	skynet.com.my	2121
104.21.95.123	5playdisk.ru	2101
104.21.88.220	gaoqing.la	1871
104.21.87.230	scoredit.com	1858
104.21.93.231	oldhousedreams.com	1811
104.21.82.223	sexxx.wang	1787
104.21.91.158	embedy.eu	1767
104.21.84.96	btcspinner.io	1739
104.21.80.221	wm55.co	1735
104.21.89.161	kinozal.tv	1713
104.21.82.239	thietkethicongnhadep.net	1701
104.21.81.229	tunisie14.tn	1673
104.21.84.60	foodlabs.com.kw	1667

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

4,050 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address	ASN	Details
104.21.85.234	AS13335 Cloudflare, Inc.	`0.11ms` from Wrocław, PL
104.21.81.151	AS13335 Cloudflare, Inc.	`0.11ms` from Wrocław, PL
104.21.95.47	AS13335 Cloudflare, Inc.	`0.12ms` from Wrocław, PL
104.21.93.135	AS13335 Cloudflare, Inc.	`0.11ms` from Wrocław, PL
104.21.80.141	AS13335 Cloudflare, Inc.	`0.11ms` from Wrocław, PL
104.21.91.83	AS13335 Cloudflare, Inc.	`0.11ms` from Wrocław, PL
104.21.94.132	AS13335 Cloudflare, Inc.	`0.11ms` from Wrocław, PL
104.21.82.24	AS13335 Cloudflare, Inc.	`0.11ms` from Wrocław, PL
104.21.86.29	AS13335 Cloudflare, Inc.	`0.11ms` from Wrocław, PL
104.21.83.198	AS13335 Cloudflare, Inc.	`0.10ms` from Wrocław, PL
104.21.89.107	AS13335 Cloudflare, Inc.	`0.11ms` from Wrocław, PL
104.21.84.18	AS13335 Cloudflare, Inc.	`0.11ms` from Wrocław, PL
104.21.87.169	AS13335 Cloudflare, Inc.	`0.11ms` from Wrocław, PL
104.21.90.253	AS13335 Cloudflare, Inc.	`0.11ms` from Wrocław, PL
104.21.92.101	AS13335 Cloudflare, Inc.	`0.11ms` from Wrocław, PL
104.21.88.143	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
172.177.141.100	AS8075 Microsoft Corporation	`0.28ms` from Boydton, US
194.78.99.164	AS5432 Proximus NV	`0.51ms` from Brussels, BE
23.61.170.36	AS16625 Akamai Technologies, Inc.	`0.92ms` from Chicago, US
51.37.95.52	AS15502 Vodafone Ireland Limited	`1.49ms` from Dublin, IE
93.212.126.244	AS3320 Deutsche Telekom AG	`3.67ms` from Frankfurt am Main, DE
83.138.173.36	AS15395 Rackspace Ltd.	`1.03ms` from London, GB
86.143.136.180	AS2856 British Telecommunications PLC	`4.38ms` from London, GB
82.42.207.4	AS5089 Virgin Media Limited	`9.76ms` from London, GB
124.182.19.20	AS1221 Telstra Limited	`2.32ms` from Melbourne, AU
23.216.60.116	AS16625 Akamai Technologies, Inc.	`0.30ms` from Paris, FR
187.103.225.20	AS28283 Adylnet Telecom	`1.23ms` from Porto Alegre, BR
35.170.248.52	AS14618 Amazon.com, Inc.	`0.44ms` from Reston, US
5.163.151.116	AS25019 Saudi Telecom Company JSC	`1.80ms` from Riyadh, SA
97.210.96.132	AS6167 Verizon Business	`15.50ms` from Seattle, US
52.141.5.132	AS8075 Microsoft Corporation	`0.35ms` from Seoul, KR
13.250.193.4	AS16509 Amazon.com, Inc.	`0.09ms` from Singapore, SG
103.169.228.20	AS36776 Five9 Inc.	`1.31ms` from Tokyo, JP
97.132.25.116	AS6167 Verizon Business	`13.14ms` from Atlanta, US
184.80.142.244	AS7029 Windstream Communications LLC	`0.52ms` from Atlanta, US
168.94.174.4	AS26086 Best Buy Co., Inc.	`10.17ms` from Chicago, US
107.200.30.228	AS7018 AT&T Enterprises, LLC	`7.39ms` from Chicago, US
182.153.26.244	AS17924 SmarTone Mobile Communications Ltd	`19.55ms` from Hong Kong, HK
47.57.9.212	AS45102 Alibaba (US) Technology Co., Ltd.	`0.76ms` from Hong Kong, HK
120.222.243.100	AS9808 China Mobile Communications Group Co., Ltd.	`4.88ms` from Jinan, CN
95.177.7.36	AS3257 GTT Communications Inc.	`12.58ms` 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 104.21.89.23

traceroute to 104.21.89.23 (104.21.89.23): 64 hops max, 52 byte packets

1 [AS35179] 83.168.71.253 0.191 ms

2 *

3 [AS13335] 104.21.89.23 0.142 ms

Measurement taken from

IPinfo ProbeNet in Wrocław, PL

On December 14th 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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