104.21.0.0/19

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 10,743,360 domain names hosted across 8,026 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address Domain Domains on this IP
104.21.0.224 historicseries.com 3304
104.21.3.95 qualityespacio.com 3104
104.21.24.188 mcversions.net 2771
104.21.28.189 hotcharts.net 2511
104.21.3.52 speedtest.org 2497
104.21.4.125 lakshory.com 2350
104.21.19.163 xxxtube2022.com 2302
104.21.5.202 ipt.cool 2187
104.21.11.6 codewith.mu 2152
104.21.16.247 ftuapps.dev 2129
104.21.1.72 klik.hr 2120
104.21.27.253 knife-chinese.com 1930
104.21.14.26 vergiler.az 1862
104.21.7.202 petibom.com 1804
104.21.24.154 payingsocialmediajobs.com 1794
104.21.25.46 lifeirl.com 1786
104.21.5.44 phimxxx.asia 1784
104.21.25.170 uncoveringpa.com 1767
104.21.8.86 groove.cm 1760
104.21.27.17 eroanime-movie.com 1753

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

Pingable IPs

8,192 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address ASN Details
104.21.31.20 AS13335 Cloudflare, Inc. 0.12ms from Yerevan, AM
104.21.30.0 AS13335 Cloudflare, Inc. 0.12ms from Yerevan, AM
104.21.21.162 AS13335 Cloudflare, Inc. 0.13ms from Yerevan, AM
104.21.11.60 AS13335 Cloudflare, Inc. 0.13ms from Yerevan, AM
104.21.5.14 AS13335 Cloudflare, Inc. 0.13ms from Yerevan, AM
104.21.20.43 AS13335 Cloudflare, Inc. 0.13ms from Yerevan, AM
104.21.25.251 AS13335 Cloudflare, Inc. 0.12ms from Yerevan, AM
104.21.4.105 AS13335 Cloudflare, Inc. 0.13ms from Yerevan, AM
104.21.26.110 AS13335 Cloudflare, Inc. 0.12ms from Lisbon, PT
104.21.6.126 AS13335 Cloudflare, Inc. 0.13ms from Yerevan, AM
104.21.9.86 AS13335 Cloudflare, Inc. 0.13ms from Lisbon, PT
104.21.10.108 AS13335 Cloudflare, Inc. 0.13ms from Lisbon, PT
104.21.0.89 AS13335 Cloudflare, Inc. 0.13ms from Yerevan, AM
104.21.22.76 AS13335 Cloudflare, Inc. 0.13ms from Yerevan, AM
104.21.7.209 AS13335 Cloudflare, Inc. 0.13ms from Yerevan, AM
104.21.1.141 AS13335 Cloudflare, Inc. 0.13ms from Lisbon, PT
104.21.27.235 AS13335 Cloudflare, Inc. 0.12ms from Lisbon, PT
104.21.16.116 AS13335 Cloudflare, Inc. 0.13ms from Lisbon, PT
104.21.14.57 AS13335 Cloudflare, Inc. 0.13ms from Lisbon, PT
104.21.17.210 AS13335 Cloudflare, Inc. 0.13ms from Yerevan, AM
104.21.15.242 AS13335 Cloudflare, Inc. 0.13ms from Yerevan, AM
104.21.29.95 AS13335 Cloudflare, Inc. 0.13ms from Yerevan, AM
104.21.24.70 AS13335 Cloudflare, Inc. 0.13ms from Lisbon, PT
104.21.13.105 AS13335 Cloudflare, Inc. 0.12ms from Lisbon, PT
104.21.2.132 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
20.93.146.195 AS8075 Microsoft Corporation 0.28ms from Amsterdam, NL
40.68.240.211 AS8075 Microsoft Corporation 0.27ms from Amsterdam, NL
47.134.139.179 AS20115 Charter Communications LLC 12.46ms from Atlanta, US
66.251.199.3 AS3356 Level 3 Parent, LLC 3.18ms from Atlanta, US
178.117.252.67 AS6848 Telenet BV 5.31ms from Brussels, BE
12.14.166.147 AS7018 AT&T Enterprises, LLC 1.52ms from Chicago, US
31.126.255.227 AS2856 British Telecommunications PLC 6.96ms from Erith, GB
42.240.136.211 AS58466 CHINANET Guangdong province network 4.82ms from Guangzhou, CN
217.233.199.35 AS3320 Deutsche Telekom AG 2.43ms from Hamburg, DE
156.59.134.115 AS21859 Zenlayer Inc 0.48ms from Ho Chi Minh City, VN
14.161.17.67 AS45899 VNPT Corp 0.92ms from Ho Chi Minh City, VN
154.92.63.35 AS132839 POWER LINE DATACENTER 1.11ms from Hong Kong, HK
70.120.28.131 AS11427 Charter Communications Inc 11.44ms from Houston, US
76.93.13.147 AS20001 Charter Communications Inc 6.08ms from Los Angeles, US
90.9.29.51 AS3215 Orange S.A. 3.23ms from Lyon, FR
124.189.22.19 AS1221 Telstra Limited 3.06ms from Melbourne, AU
191.239.99.35 AS8075 Microsoft Corporation 0.97ms from Osaka, JP
2.21.140.211 AS20940 Akamai International B.V. 0.31ms from Paris, FR
149.169.23.83 AS2900 Arizona Tri University Network 1.11ms from Phoenix, US
121.42.4.67 AS37963 Hangzhou Alibaba Advertising Co.,Ltd. 0.48ms from Qingdao, CN
177.195.156.51 AS28573 Claro NXT Telecomunicacoes Ltda 5.51ms from Sao Paulo, BR
206.116.226.211 AS852 TELUS Communications Inc. 4.33ms from Seattle, US
52.231.88.163 AS8075 Microsoft Corporation 0.33ms from Seoul, KR
95.196.219.99 AS3301 Telia Company AB 10.28ms from Stockholm, SE
43.253.140.3 AS17686 ACCELIA 0.83ms from Tokyo, JP

Traceroute

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

$
traceroute -a -n -q1 -f3 104.21.20.34
traceroute to 104.21.20.34 (104.21.20.34): 64 hops max, 52 byte packets
3 [AS8932] 185.48.241.27 40.84 ms
4 [AS13335] 104.21.20.34 0.268 ms
Measurement taken from IPinfo ProbeNet in Yerevan, AM
On

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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