1. All IP Ranges
  2. 104.0.0.0/8
  3. 104.21.0.0/16
  4. AS13335  | 104.21.48.0/20

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:      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:      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:        2026-04-30
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:      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

Nearby Ranges

BGP prefixes that overlap with 104.21.0.0/16

No nearby ranges found.

Hosted domains

There are 5,923,587 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
104.21.61.245 alkoora.live 16422
104.21.48.46 deconreconstruction.com 2538
104.21.53.64 hdfans.org 2103
104.21.53.23 bodog.eu 1900
104.21.52.166 filefox.cc 1882
104.21.59.36 1717se.cc 1861
104.21.63.242 bannedsextapes.com 1840
104.21.53.20 britmodeller.com 1831
104.21.57.225 mediadesk.org 1813
104.21.48.232 bitcoinwisdom.io 1795
104.21.53.211 onlinepokervidsdirect.info 1767
104.21.61.182 mozzartbet.ba 1733
104.21.48.19 movies123.pro 1730
104.21.50.72 sharktank.co.in 1653
104.21.51.61 xszj.org 1580
104.21.58.252 dodi-repacks.site 1576
104.21.62.20 full-novel.com 1559
104.21.58.180 webwiki.co.uk 1543
104.21.54.233 bathandbodyworks.com.kw 1540
104.21.61.57 kkmac.com 1529

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

4,092 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address ASN Details
104.21.54.75 AS13335 Cloudflare, Inc. 0.11ms from Wrocław, PL
104.21.63.80 AS13335 Cloudflare, Inc. 0.11ms from Wrocław, PL
104.21.55.229 AS13335 Cloudflare, Inc. 0.11ms from Wrocław, PL
104.21.59.179 AS13335 Cloudflare, Inc. 0.11ms from Wrocław, PL
104.21.51.78 AS13335 Cloudflare, Inc. 0.11ms from Wrocław, PL
104.21.61.22 AS13335 Cloudflare, Inc. 0.10ms from Wrocław, PL
104.21.53.24 AS13335 Cloudflare, Inc. 0.10ms from Wrocław, PL
104.21.62.87 AS13335 Cloudflare, Inc. 0.11ms from Wrocław, PL
104.21.50.224 AS13335 Cloudflare, Inc. 0.11ms from Wrocław, PL
104.21.57.247 AS13335 Cloudflare, Inc. 0.11ms from Wrocław, PL
104.21.52.37 AS13335 Cloudflare, Inc. 0.10ms from Wrocław, PL
104.21.48.186 AS13335 Cloudflare, Inc. 0.11ms from Wrocław, PL
104.21.56.154 AS13335 Cloudflare, Inc. 0.11ms from Wrocław, PL
104.21.58.39 AS13335 Cloudflare, Inc. 0.11ms from Wrocław, PL
104.21.60.188 AS13335 Cloudflare, Inc. 0.10ms from Wrocław, PL
104.21.49.105 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
49.229.30.20 AS45458 SBN-ISP/AWN-ISP and SBN-NIX/AWN-NIX 0.69ms from Bangkok, TH
20.96.247.20 AS8075 Microsoft Corporation 0.31ms from Boydton, US
184.19.219.36 AS5650 Frontier Communications of America, Inc. 12.19ms from Chicago, US
46.60.253.164 AS51704 South West Grid for Learning Trust Ltd. 0.35ms from London, GB
109.173.57.164 AS42610 PJSC Rostelecom 1.24ms from Moscow, RU
46.181.137.4 AS39927 E-Light-Telecom Ltd. 7.21ms from Novosibirsk, RU
18.213.78.4 AS14618 Amazon.com, Inc. 0.22ms from Reston, US
211.34.188.100 AS4766 Korea Telecom 5.31ms from Seoul, KR
52.94.13.84 AS16509 Amazon.com, Inc. 0.49ms from Sydney, AU
182.171.230.180 AS2527 Sony Network Communications Inc. 1.67ms from Tokyo, JP
174.167.152.20 AS7922 Comcast Cable Communications, LLC 8.40ms from Ashburn, US
23.64.112.84 AS20940 Akamai International B.V. 0.20ms from Chicago, US
34.251.55.68 AS16509 Amazon.com, Inc. 0.16ms from Dublin, IE
79.200.6.228 AS3320 Deutsche Telekom AG 2.90ms from Hamburg, DE
175.207.235.116 AS4766 Korea Telecom 10.44ms from Incheon, KR
38.162.109.84 AS8796 FASTNET DATA INC 0.31ms from Los Angeles, US
73.46.68.196 AS7922 Comcast Cable Communications, LLC 6.05ms from Miami, US
35.182.112.244 AS16509 Amazon.com, Inc. 0.14ms from Montreal, CA
52.175.136.180 AS8075 Microsoft Corporation 0.24ms from Osaka, JP
207.96.93.52 AS6079 RCN 5.44ms from Secaucus, US
221.148.175.164 AS4766 Korea Telecom 1.40ms from Seoul, KR
60.240.185.68 AS7545 TPG Telecom Limited 1.22ms from Sydney, AU
60.21.77.100 AS4837 CHINA UNICOM China169 Backbone 10.67ms from Tieling, CN
86.86.48.68 AS1136 KPN B.V. 2.56ms from Amsterdam, NL
174.109.117.68 AS11426 Charter Communications Inc 10.93ms from Charlotte, US

Traceroute

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

$
traceroute -a -n -q1 104.21.58.254
traceroute to 104.21.58.254 (104.21.58.254): 64 hops max, 52 byte packets
2 *
Measurement taken from IPinfo ProbeNet in Wrocław, PL
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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