104.21.48.0/20

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:      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


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

Nearby Ranges

BGP prefixes that overlap with 104.21.0.0/16

No nearby ranges found.

Hosted domains

There are 5,493,595 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
104.21.48.1	7mmtv.sx	310664
104.21.54.9	teknosimple.com	2304
104.21.63.160	almaqalah.com	2261
104.21.59.50	rcity.co.il	2185
104.21.53.7	x99av.com	2144
104.21.48.232	bitcoinwisdom.io	2053
104.21.48.19	movies123.pro	2005
104.21.50.72	sharktank.co.in	1892
104.21.49.241	makemkv.com	1875
104.21.63.229	multipointtv.com	1823
104.21.63.24	foxy-it.com.ua	1812
104.21.58.158	digitalme.my	1785
104.21.61.175	dl-x.com	1719
104.21.54.105	webcontabilidade.com	1708
104.21.50.28	adjaranet.to	1612
104.21.59.36	1717se.cc	1605
104.21.63.63	animekaizoku.com	1568
104.21.49.7	gravity.ai	1556
104.21.58.126	blazeworks.jp	1548
104.21.49.19	rodgersandhammerstein.com	1546

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
104.21.48.104	AS13335 Cloudflare, Inc.	`0.13ms` from Yerevan, AM
104.21.57.148	AS13335 Cloudflare, Inc.	`0.13ms` from Yerevan, AM
104.21.54.178	AS13335 Cloudflare, Inc.	`0.14ms` from Yerevan, AM
104.21.58.79	AS13335 Cloudflare, Inc.	`0.14ms` from Brisbane, AU
104.21.55.47	AS13335 Cloudflare, Inc.	`0.13ms` from Yerevan, AM
104.21.61.227	AS13335 Cloudflare, Inc.	`0.14ms` from Yerevan, AM
104.21.51.37	AS13335 Cloudflare, Inc.	`0.13ms` from Yerevan, AM
104.21.59.39	AS13335 Cloudflare, Inc.	`0.13ms` from Yerevan, AM
104.21.56.117	AS13335 Cloudflare, Inc.	`0.13ms` from Yerevan, AM
104.21.52.140	AS13335 Cloudflare, Inc.	`0.14ms` from Auckland, NZ
104.21.53.51	AS13335 Cloudflare, Inc.	`0.13ms` from Yerevan, AM
104.21.49.231	AS13335 Cloudflare, Inc.	`0.14ms` from Yerevan, AM
104.21.60.111	AS13335 Cloudflare, Inc.	`0.13ms` from Auckland, NZ
104.21.63.103	AS13335 Cloudflare, Inc.	`0.13ms` from Yerevan, AM
104.21.50.121	AS13335 Cloudflare, Inc.	`0.13ms` from Yerevan, AM
104.21.62.213	AS13335 Cloudflare, Inc.	`0.14ms` 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
96.225.158.244	AS701 Verizon Business	`9.25ms` from Ashburn, US
40.71.223.244	AS8075 Microsoft Corporation	`0.42ms` from Ashburn, US
65.24.223.36	AS10796 Charter Communications Inc	`15.85ms` from Columbus, US
18.254.128.228	AS8987 Amazon Data Services Ireland Ltd	`0.81ms` from Columbus, US
79.243.170.196	AS3320 Deutsche Telekom AG	`2.24ms` from Duesseldorf, DE
84.153.140.36	AS3320 Deutsche Telekom AG	`5.29ms` from Frankfurt am Main, DE
180.244.153.196	AS7713 PT Telekomunikasi Indonesia	`1.33ms` from Jakarta, ID
92.145.87.164	AS3215 Orange S.A.	`6.41ms` from Lyon, FR
162.33.224.4	AS62664 UNITED TELEPORTS, INC.	`15.95ms` from Miami, US
95.235.127.36	AS3269 Telecom Italia S.p.A.	`5.77ms` from Milan, IT
125.117.114.132	AS4134 CHINANET-BACKBONE	`7.39ms` from Ningbo, CN
124.159.54.196	AS7679 QTnet,Inc.	`9.22ms` from Osaka, JP
131.108.100.244	AS61672 Entelvias provedor de internet ltda	`3.55ms` from Porto Alegre, BR
181.198.104.180	AS27947 Telconet S.A	`0.70ms` from Quito, EC
112.214.141.36	AS10036 DLIVE	`2.57ms` from Seoul, KR
58.121.158.196	AS9318 SK Broadband Co Ltd	`1.48ms` from Seoul, KR
51.158.180.244	AS12876 SCALEWAY S.A.S.	`0.33ms` from Amsterdam, NL
206.247.137.68	AS30103 Zoom Video Communications, Inc	`0.16ms` from Ashburn, US
73.31.41.148	AS7922 Comcast Cable Communications, LLC	`10.69ms` from Ashburn, US
13.248.165.52	AS16509 Amazon.com, Inc.	`0.04ms` from Bangkok, TH
34.218.26.180	AS16509 Amazon.com, Inc.	`0.16ms` from Boardman, US
118.93.205.212	AS9500 One New Zealand Group Limited	`5.77ms` from Christchurch, NZ
122.255.27.84	AS18001 Dialog Axiata PLC.	`4.31ms` from Colombo, LK
37.1.220.180	AS58061 Scalaxy B.V.	`0.17ms` from Meppel, NL
176.193.41.68	AS12714 PJSC MegaFon	`1.57ms` from Moscow, RU

Traceroute

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

traceroute -a -n -q1 -f4 104.21.59.81

traceroute to 104.21.59.81 (104.21.59.81): 64 hops max, 52 byte packets

4 [AS13335] 172.69.220.2 28.756 ms

5 [AS13335] 104.21.59.81 0.165 ms

Measurement taken from

IPinfo ProbeNet in Luxembourg, LU

On October 25th 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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