104.21.32.0/20

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 5,506,725 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
104.21.45.76	aluracursos.com	6766
104.21.42.227	newsstary.com	4532
104.21.38.23	magicjump.com	3178
104.21.34.23	greenvalleyazrealestate.com	2874
104.21.33.38	vodlara.com	2754
104.21.36.242	remstroy.kr.ua	2627
104.21.46.67	avfs.org.in	2424
104.21.42.131	furiaflix.net	2353
104.21.41.107	filman.cc	2166
104.21.33.127	metools.info	2121
104.21.40.250	ngontinh24.com	2052
104.21.47.46	lewdweb.net	1914
104.21.47.254	mov.onl	1879
104.21.33.222	bradfordnashville.com	1826
104.21.47.101	edulife.kz	1782
104.21.43.211	ku.farm	1766
104.21.34.185	kcsc.org.uk	1729
104.21.39.199	futchief.com	1712
104.21.42.151	doodrive.com	1683
104.21.40.43	eriri.net	1670

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
104.21.34.113	AS13335 Cloudflare, Inc.	`0.14ms` from Yerevan, AM
104.21.46.201	AS13335 Cloudflare, Inc.	`0.13ms` from Brisbane, AU
104.21.36.41	AS13335 Cloudflare, Inc.	`0.14ms` from Yerevan, AM
104.21.35.50	AS13335 Cloudflare, Inc.	`0.14ms` from Yerevan, AM
104.21.33.0	AS13335 Cloudflare, Inc.	`0.12ms` from Yerevan, AM
104.21.32.132	AS13335 Cloudflare, Inc.	`0.13ms` from Brisbane, AU
104.21.41.18	AS13335 Cloudflare, Inc.	`0.13ms` from Brisbane, AU
104.21.40.53	AS13335 Cloudflare, Inc.	`0.13ms` from Brisbane, AU
104.21.47.90	AS13335 Cloudflare, Inc.	`0.12ms` from Auckland, NZ
104.21.42.162	AS13335 Cloudflare, Inc.	`0.13ms` from Yerevan, AM
104.21.37.117	AS13335 Cloudflare, Inc.	`0.13ms` from Yerevan, AM
104.21.43.185	AS13335 Cloudflare, Inc.	`0.13ms` from Yerevan, AM
104.21.44.114	AS13335 Cloudflare, Inc.	`0.13ms` from Yerevan, AM
104.21.38.119	AS13335 Cloudflare, Inc.	`0.14ms` from Yerevan, AM
104.21.45.237	AS13335 Cloudflare, Inc.	`0.13ms` from Yerevan, AM
104.21.39.244	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
146.158.26.52	AS41124 BTcom Infocommunications Ltd.	`1.42ms` from Almaty, KZ
194.122.193.228	AS1136 KPN B.V.	`3.90ms` from Amsterdam, NL
73.80.255.4	AS7922 Comcast Cable Communications, LLC	`8.73ms` from Ashburn, US
8.131.242.36	AS37963 Hangzhou Alibaba Advertising Co.,Ltd.	`2.02ms` from Beijing, CN
35.210.38.84	AS15169 Google LLC	`0.18ms` from Brussels, BE
187.55.43.52	AS8167 V tal	`6.62ms` from Curitiba, BR
79.225.114.84	AS3320 Deutsche Telekom AG	`4.60ms` from Hamburg, DE
86.50.224.212	AS1741 CSC - Tieteen tietotekniikan keskus Oy	`1.17ms` from Helsinki, FI
70.124.208.100	AS11427 Charter Communications Inc	`6.15ms` from Houston, US
58.222.185.52	AS4134 CHINANET-BACKBONE	`6.07ms` from Huai'an, CN
167.248.105.52	AS15108 Allo Communications LLC	`4.74ms` from Lincoln, US
89.191.216.36	AS174 Cogent Communications, LLC	`0.49ms` from London, GB
76.82.88.36	AS20001 Charter Communications Inc	`8.56ms` from Los Angeles, US
18.144.69.196	AS16509 Amazon.com, Inc.	`0.33ms` from Santa Clara, US
63.222.122.100	AS3491 PCCW Global, Inc.	`0.31ms` from Singapore, SG
125.49.162.196	AS2516 KDDI CORPORATION	`8.04ms` from Tokyo, JP
16.62.63.116	AS16509 Amazon.com, Inc.	`0.60ms` from Zuerich, CH
171.7.86.228	AS45758 Triple T Broadband Public Company Limited	`2.74ms` from Bangkok, TH
101.33.13.100	AS21859 Zenlayer Inc	`0.17ms` from Hanoi, VN
2.15.146.84	AS3215 Orange S.A.	`4.50ms` from Marseille, FR
34.93.18.132	AS396982 Google LLC	`0.09ms` from Mumbai, IN
69.203.129.196	AS12271 Charter Communications Inc	`3.85ms` from New York City, US
100.33.80.164	AS701 Verizon Business	`2.31ms` from New York City, US
46.172.120.84	AS196791 RTA Svyaz Ltd.	`10.18ms` from Novosibirsk, RU
200.25.91.36	AS7195 EDGEUNO S.A.S	`0.08ms` from Osasco, BR

Traceroute

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

traceroute -a -n -q1 -f4 104.21.46.127

traceroute to 104.21.46.127 (104.21.46.127): 64 hops max, 52 byte packets

4 [AS13335] 172.69.220.2 0.8 ms

5 [AS13335] 104.21.46.127 0.174 ms

Measurement taken from

IPinfo ProbeNet in Luxembourg, LU

On October 30th 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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