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
172.66.153.229	AS13335 Cloudflare, Inc.	`0.12ms` from Lima, PE
172.66.145.200	AS13335 Cloudflare, Inc.	`0.12ms` from Lima, PE
172.66.150.103	AS13335 Cloudflare, Inc.	`0.12ms` from Lima, PE
172.66.155.48	AS13335 Cloudflare, Inc.	`0.13ms` from Yerevan, AM
172.66.149.161	AS13335 Cloudflare, Inc.	`0.12ms` from Lima, PE
172.66.158.44	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
172.66.144.156	AS13335 Cloudflare, Inc.	`0.12ms` from Lima, PE
172.66.146.66	AS13335 Cloudflare, Inc.	`0.13ms` from Lima, PE
172.66.151.235	AS13335 Cloudflare, Inc.	`0.12ms` from Lima, PE
172.66.154.79	AS13335 Cloudflare, Inc.	`0.13ms` from Lima, PE
172.66.147.114	AS13335 Cloudflare, Inc.	`0.12ms` from Lima, PE
172.66.148.195	AS13335 Cloudflare, Inc.	`0.12ms` from Lima, PE
172.66.157.140	AS13335 Cloudflare, Inc.	`0.11ms` from Lima, PE
172.66.152.187	AS13335 Cloudflare, Inc.	`0.12ms` 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
45.232.56.4	AS273683 ALLREDE TELECOM LTDA	`2.42ms` from Brasilia, BR
13.111.137.36	AS14340 Salesforce.com, Inc.	`0.87ms` from Dallas, US
191.7.142.52	AS263321 ILOGNET PROVEDOR	`18.08ms` from Fortaleza, BR
31.42.145.84	AS209854 Cyberzone S.A.	`0.45ms` from Frankfurt am Main, DE
204.48.100.20	AS40232 Mid-States Services, LLC.	`5.20ms` from Kansas City, US
31.128.160.148	AS48919 UACITY Ltd.	`0.47ms` from Kyiv, UA
92.16.199.20	AS13285 TalkTalk Communications Limited	`5.06ms` from Manchester, GB
35.183.30.84	AS16509 Amazon.com, Inc.	`0.70ms` from Montreal, CA
206.168.144.4	AS395019 TCSS	`0.47ms` from New York City, US
60.209.208.180	AS4837 CHINA UNICOM China169 Backbone	`1.53ms` from Qingdao, CN
189.106.245.52	AS7738 V tal	`1.63ms` from Rio de Janeiro, BR
189.153.10.20	AS8151 UNINET	`10.63ms` from Santiago de Queretaro, MX
89.25.89.4	AS9070 Cooolbox AD	`6.03ms` from Sofia, BG
223.13.126.20	AS4134 CHINANET-BACKBONE	`5.73ms` from Taiyuan, CN
181.127.55.164	AS23201 Telecel S.A.	`9.34ms` from Asuncion, PY
134.164.189.180	AS6009 United States Department of Defense (DoD)	`0.65ms` from Atlanta, US
93.207.181.36	AS3320 Deutsche Telekom AG	`2.83ms` from Hamburg, DE
112.17.4.84	AS56041 China Mobile communications corporation	`3.75ms` from Hangzhou, CN
43.135.100.164	AS132203 Tencent Building, Kejizhongyi Avenue	`0.41ms` from Hong Kong, HK
156.226.25.180	AS142286 LUOGELANG (FRANCE) LIMITED	`0.50ms` from Hong Kong, HK
167.205.13.132	AS4796 Institute of Technology Bandung	`8.35ms` from Jakarta, ID
24.71.106.36	AS6327 Shaw Communications	`3.45ms` from Kelowna, CA
88.122.207.20	AS12322 Free SAS	`11.54ms` from Lille, FR
81.134.105.212	AS2856 British Telecommunications PLC	`0.71ms` from London, GB
197.232.107.116	AS36866 Jamii Telecommunications Limited	`1.78ms` from Nairobi, KE

Traceroute

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

traceroute -a -n -q1 172.66.151.245

traceroute to 172.66.151.245 (172.66.151.245): 64 hops max, 52 byte packets

1 [AS7195] 200.25.47.17 1.905 ms

2 *

3 [AS13335] 172.66.151.245 0.251 ms

Measurement taken from

IPinfo ProbeNet in Lima, PE

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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