172.66.144.0/20

AS13335 · Cloudflare, Inc.

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Summary

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

WHOIS Details

NetHandle:      NET-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:        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


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:      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 172.66.0.0/16

No nearby ranges found.

Hosted domains

There are 148,150 domain names hosted across 3,765 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
172.66.144.96	brandbucket.com	56481
172.66.151.154	yydsvod.com	45949
172.66.157.248	bhl-china.org	3795
172.66.146.131	bhl-china.org	3784
172.66.144.212	bhl-china.org	3783
172.66.156.194	bhl-china.org	3783
172.66.151.178	bhl-china.org	3779
172.66.151.51	netsons.com	1037
172.66.144.93	allmylinks.com	709
172.66.148.169	kg3306.com	681
172.66.148.227	instantly.ai	643
172.66.145.80	cutt.ly	623
172.66.150.52	pecsb.it	552
172.66.158.158	designerappliances.com	511
172.66.149.242	handandstone.com	492
172.66.144.158	immobilien-pfister.de	483
172.66.152.174	christianfilipina.com	468
172.66.150.237	beboo.ru	464
172.66.149.146	lynk.id	459
172.66.151.48	travelwildtw.com	421

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
172.66.151.146	AS13335 Cloudflare, Inc.	`0.12ms` from Lima, PE
172.66.154.63	AS13335 Cloudflare, Inc.	`0.12ms` from Lima, PE
172.66.159.253	AS13335 Cloudflare, Inc.	`0.13ms` from Lima, PE
172.66.152.25	AS13335 Cloudflare, Inc.	`0.13ms` from Lima, PE
172.66.157.27	AS13335 Cloudflare, Inc.	`0.12ms` from Lima, PE
172.66.146.153	AS13335 Cloudflare, Inc.	`0.13ms` from Yerevan, AM
172.66.156.168	AS13335 Cloudflare, Inc.	`0.12ms` from Lima, PE
172.66.148.27	AS13335 Cloudflare, Inc.	`0.12ms` from Lima, PE
172.66.147.17	AS13335 Cloudflare, Inc.	`0.13ms` from Lima, PE
172.66.150.157	AS13335 Cloudflare, Inc.	`0.13ms` from Lima, PE
172.66.153.128	AS13335 Cloudflare, Inc.	`0.12ms` from Lima, PE
172.66.158.242	AS13335 Cloudflare, Inc.	`0.13ms` from Lima, PE
172.66.155.170	AS13335 Cloudflare, Inc.	`0.12ms` from Lima, PE
172.66.149.177	AS13335 Cloudflare, Inc.	`0.13ms` from Lima, PE
172.66.145.186	AS13335 Cloudflare, Inc.	`0.13ms` from Lima, PE
172.66.144.13	AS13335 Cloudflare, Inc.	`0.12ms` from Lima, PE

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
190.8.187.212	AS52473 Cooperativa Telefónica de Abasto	`2.18ms` from Buenos Aires, AR
68.87.4.68	AS7922 Comcast Cable Communications, LLC	`0.88ms` from Chicago, US
169.61.63.84	AS36351 IBM Cloud	`1.12ms` from Dallas, US
79.216.68.164	AS3320 Deutsche Telekom AG	`6.24ms` from Frankfurt am Main, DE
86.184.172.180	AS2856 British Telecommunications PLC	`1.90ms` from London, GB
81.38.150.148	AS3352 TELEFONICA DE ESPANA S.A.U.	`12.67ms` from Madrid, ES
14.38.164.36	AS4766 Korea Telecom	`1.91ms` from Seoul, KR
150.83.84.20	AS2907 Research Organization of Information and Systems, National Institute of Informatics	`15.09ms` from Tokyo, JP
210.194.211.52	AS9824 JCOM Co., Ltd.	`11.45ms` from Tokyo, JP
71.171.95.100	AS701 Verizon Business	`1.97ms` from Ashburn, US
52.37.52.36	AS16509 Amazon.com, Inc.	`0.16ms` from Boardman, US
184.59.35.84	AS10796 Charter Communications Inc	`6.14ms` from Chicago, US
85.4.226.52	AS3303 Swisscom (Switzerland) Ltd	`0.70ms` from Geneve, CH
58.252.77.100	AS17816 China Unicom IP network China169 Guangdong province	`4.19ms` from Guangzhou, CN
69.255.14.244	AS7922 Comcast Cable Communications, LLC	`6.88ms` from Herndon, US
42.5.127.148	AS4837 CHINA UNICOM China169 Backbone	`4.00ms` from Liaoyang, CN
192.195.111.4	AS15108 Allo Communications LLC	`6.33ms` from Lincoln, US
81.134.105.212	AS2856 British Telecommunications PLC	`0.86ms` from London, GB
147.249.16.100	AS18434 Fidelity National Information Services, Inc.	`18.07ms` from Los Angeles, US
98.188.177.164	AS22773 Cox Communications Inc.	`9.58ms` from Los Angeles, US
195.120.163.244	AS3269 Telecom Italia S.p.A.	`3.55ms` from Milan, IT
45.55.94.148	AS14061 DigitalOcean, LLC	`0.25ms` from New York City, US
147.46.148.116	AS9488 Seoul National University	`0.98ms` from Seoul, KR
78.57.253.244	AS8764 Telia Lietuva, AB	`6.12ms` from Siauliai, LT
171.123.150.148	AS4837 CHINA UNICOM China169 Backbone	`7.42ms` from Taiyuan, CN

Traceroute

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

traceroute -a -n -q1 -f4 172.66.149.146

traceroute to 172.66.149.146 (172.66.149.146): 64 hops max, 52 byte packets

4 [AS13335] 172.69.220.2 0.777 ms

5 [AS13335] 172.66.149.146 0.158 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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