172.66.40.0/21

AS13335  ·  Cloudflare, Inc.

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Summary

Country United States
Domain cloudflare.com
ASN AS13335
Registry ARIN
ID CLOUDFLARENET

WHOIS Details

NetHandle:      NET-172-64-0-0-1
OrgID:          CLOUD14
Parent:         NET-172-0-0-0-0
NetName:        CLOUDFLARENET
NetRange:       172.64.0.0 - 172.71.255.255
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:        2015-02-25
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:      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


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

Nearby Ranges

BGP prefixes that overlap with 172.66.0.0/16

No nearby ranges found.

Hosted domains

There are 378,909 domain names hosted across 1,059 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address Domain Domains on this IP
172.66.40.121 jetprintapp.com 79928
172.66.43.135 jetprintapp.com 79706
172.66.40.56 stackify.com 14324
172.66.43.200 aqar.fm 7261
172.66.40.99 manuals.plus 4768
172.66.43.157 manuals.plus 4471
172.66.47.131 xx777wa.com 2893
172.66.44.125 2765133.com 2846
172.66.40.89 mrguider.org 1392
172.66.43.167 mrguider.org 1326
172.66.40.193 javhub.net 1303
172.66.41.48 screengeek.net 1209
172.66.42.208 screengeek.net 1179
172.66.44.93 bst-hydepark.com 1134
172.66.47.163 ip777si.com 1133
172.66.40.63 easy-peasy.ai 1104
172.66.43.63 javhub.net 1079
172.66.43.193 easy-peasy.ai 1077
172.66.40.232 contra.com 1066
172.66.43.31 fontspace.com 1057

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

2,048 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address ASN Details
172.66.43.16 AS13335 Cloudflare, Inc. 0.13ms from Yerevan, AM
172.66.46.176 AS13335 Cloudflare, Inc. 0.13ms from Yerevan, AM
172.66.47.254 AS13335 Cloudflare, Inc. 0.12ms from Lisbon, PT
172.66.41.253 AS13335 Cloudflare, Inc. 0.13ms from Lisbon, PT
172.66.42.246 AS13335 Cloudflare, Inc. 0.13ms from Yerevan, AM
172.66.45.214 AS13335 Cloudflare, Inc. 0.13ms from Yerevan, AM
172.66.40.163 AS13335 Cloudflare, Inc. 0.12ms from Lisbon, PT
172.66.44.141 AS13335 Cloudflare, Inc. 0.13ms from Lisbon, PT

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
104.167.124.69 AS394991 SWC TELESOLUTIONS, INC. 6.63ms from Albuquerque, US
62.67.189.101 AS3356 Level 3 Parent, LLC 6.00ms from Budapest, HU
47.223.246.133 AS19108 Optimum 10.89ms from Dallas, US
141.209.87.37 AS27274 Central Michigan University 4.65ms from Detroit, US
171.246.82.5 AS7552 Viettel Group 3.11ms from Ho Chi Minh City, VN
187.0.28.229 AS262751 TERRA FIBER TELECOM LTDA-ME 7.78ms from Joao Pessoa, BR
6.11.88.69 AS668 United States Department of Defense (DoD) 1.80ms from Los Angeles, US
71.230.121.197 AS7922 Comcast Cable Communications, LLC 9.85ms from New York City, US
18.173.153.5 AS16509 Amazon.com, Inc. 3.18ms from Nuernberg, DE
50.53.10.21 AS20055 Wholesail networks LLC 1.53ms from Portland, US
170.233.156.245 AS264440 POINT TELECOMUNICAÇÕES LTDA ME 13.31ms from Sao Paulo, BR
66.119.202.37 AS16713 Northwest Open Access Network 6.52ms from Seattle, US
115.90.34.5 AS3786 LG DACOM Corporation 1.78ms from Seoul, KR
211.228.203.37 AS4766 Korea Telecom 5.63ms from Seoul, KR
106.12.99.117 AS38365 Beijing Baidu Netcom Science and Technology Co., Ltd. 4.63ms from Shenzhen, CN
3.24.47.245 AS16509 Amazon.com, Inc. 0.16ms from Sydney, AU
113.149.64.133 AS2516 KDDI CORPORATION 1.70ms from Tokyo, JP
132.45.254.133 AS668 United States Department of Defense (DoD) 0.51ms from Atlanta, US
1.202.200.101 AS4847 China Networks Inter-Exchange 3.00ms from Beijing, CN
24.63.18.229 AS7922 Comcast Cable Communications, LLC 5.89ms from Boston, US
113.165.31.5 AS45899 VNPT Corp 2.75ms from Da Nang, VN
76.102.209.197 AS7922 Comcast Cable Communications, LLC 10.20ms from Fremont, US
13.75.108.133 AS8075 Microsoft Corporation 0.58ms from Hong Kong, HK
175.149.191.229 AS4837 CHINA UNICOM China169 Backbone 7.29ms from Liaoyang, CN
31.3.64.101 AS60819 Safenames Ltd. 3.85ms 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 -f3 172.66.44.86
traceroute to 172.66.44.86 (172.66.44.86): 64 hops max, 52 byte packets
3 [AS8932] 185.48.241.27 0.928 ms
4 [AS13335] 172.66.44.86 0.229 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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