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:        [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 158,770 domain names hosted across 3,778 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	55573
172.66.151.154	mysticalmerries.com	54399
172.66.156.194	bhl-china.org	3398
172.66.157.248	bhl-china.org	3388
172.66.156.131	bhl-china.org	3358
172.66.155.14	bhl-china.org	3322
172.66.151.178	bhl-china.org	3252
172.66.149.232	bhl-china.org	3203
172.66.146.131	bhl-china.org	3189
172.66.144.212	bhl-china.org	3188
172.66.151.51	netsons.com	1275
172.66.150.52	aruba.it	915
172.66.148.227	instantly.ai	713
172.66.144.93	allmylinks.com	693
172.66.148.169	king33l.com	692
172.66.145.80	cutt.ly	668
172.66.149.146	lynk.id	667
172.66.144.158	densch-schmidt.de	665
172.66.158.158	designerappliances.com	540
172.66.150.237	beboo.ru	458

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
172.66.144.156	AS13335 Cloudflare, Inc.	`0.12ms` from Lima, PE
172.66.152.187	AS13335 Cloudflare, Inc.	`0.12ms` from Yerevan, AM
172.66.155.48	AS13335 Cloudflare, Inc.	`0.13ms` from Yerevan, AM
172.66.147.114	AS13335 Cloudflare, Inc.	`0.12ms` from Lima, PE
172.66.148.195	AS13335 Cloudflare, Inc.	`0.12ms` from Lima, PE
172.66.151.235	AS13335 Cloudflare, Inc.	`0.12ms` from Lima, PE
172.66.157.140	AS13335 Cloudflare, Inc.	`0.11ms` from Lima, PE
172.66.150.103	AS13335 Cloudflare, Inc.	`0.12ms` from Lima, PE
172.66.153.229	AS13335 Cloudflare, Inc.	`0.12ms` from Lima, PE
172.66.154.79	AS13335 Cloudflare, Inc.	`0.13ms` from Lima, PE
172.66.149.161	AS13335 Cloudflare, Inc.	`0.12ms` from Lima, PE
172.66.146.66	AS13335 Cloudflare, Inc.	`0.13ms` from Lima, PE
172.66.145.200	AS13335 Cloudflare, Inc.	`0.12ms` from Lima, PE
172.66.156.8	AS13335 Cloudflare, Inc.	`0.12ms` from Lisbon, PT
172.66.159.177	AS13335 Cloudflare, Inc.	`0.12ms` from Lima, PE
172.66.158.44	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
24.147.181.100	AS7922 Comcast Cable Communications, LLC	`10.24ms` from Boston, US
87.39.116.20	AS1213 HEAnet CLG	`9.50ms` from Dublin, IE
79.211.137.180	AS3320 Deutsche Telekom AG	`1.51ms` from Duesseldorf, DE
31.42.145.84	AS209854 Cyberzone S.A.	`0.45ms` from Frankfurt am Main, DE
161.248.73.20	AS140822 ANPHATIDC	`0.85ms` from Ho Chi Minh City, VN
176.91.193.212	AS16135 Turkcell A.S.	`14.95ms` from Istanbul, TR
24.71.106.36	AS6327 Shaw Communications	`3.45ms` from Kelowna, CA
128.34.45.20	AS22 Navy Network Information Center (NNIC)	`1.86ms` from Los Angeles, US
83.44.120.180	AS3352 TELEFONICA DE ESPANA S.A.U.	`11.02ms` from Madrid, ES
178.167.17.100	AS21453 Flex Ltd.	`2.23ms` from Moscow, RU
71.88.171.132	AS20115 Charter Communications LLC	`16.78ms` from Murfreesboro, US
188.66.239.244	AS50010 Omani Qatari Telecommunication Company SAOC	`2.58ms` from Muscat, OM
113.153.199.52	AS2516 KDDI CORPORATION	`4.25ms` from Osaka, JP
153.125.28.196	AS9615 TOYOHASHI CABLE NETWORK INC.	`5.18ms` from Osaka, JP
166.88.228.20	AS26383 Baxet Group Inc.	`0.04ms` from Paris, FR
179.152.1.20	AS28573 Claro NXT Telecomunicacoes Ltda	`6.55ms` from Porto Alegre, BR
34.233.110.20	AS14618 Amazon.com, Inc.	`0.18ms` from Reston, US
189.153.10.20	AS8151 UNINET	`10.63ms` from Santiago de Queretaro, MX
207.216.171.148	AS852 TELUS Communications Inc.	`4.07ms` from Seattle, US
32.216.182.132	AS46690 Southern New England Telephone Company and SNET America, Inc.	`4.46ms` from Secaucus, US
118.25.91.228	AS45090 Shenzhen Tencent Computer Systems Company Limited	`0.70ms` from Shanghai, CN
163.8.50.116	AS45589 AUSGRID	`1.41ms` from Sydney, AU
114.27.83.68	AS3462 Data Communication Business Group	`4.01ms` from Taichung, TW
103.186.119.4	AS149791 StarVerse Network Ltd.	`0.28ms` from Taipei, TW
161.202.247.132	AS36351 IBM Cloud	`0.66ms` from Tokyo, JP

Traceroute

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

traceroute -a -n -q1 -f2 172.66.159.31

traceroute to 172.66.159.31 (172.66.159.31): 64 hops max, 52 byte packets

2 [] 200.1.6.26 0.783 ms

3 [AS13335] 172.66.159.31 0.276 ms

Measurement taken from

IPinfo ProbeNet in Quito, EC

On November 28th 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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