172.66.128.0/20

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:      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


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:      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

Nearby Ranges

BGP prefixes that overlap with 172.66.0.0/16

No nearby ranges found.

Hosted domains

There are 15,284 domain names hosted across 1,803 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
172.66.135.196	ait.com	979
172.66.137.206	ait.com	896
172.66.132.86	msha.ke	569
172.66.132.87	msha.ke	558
172.66.132.218	adoption.com	362
172.66.137.29	adoption.com	359
172.66.135.81	11880.com	279
172.66.136.159	11880.com	243
172.66.137.33	givebutter.com	226
172.66.133.186	givebutter.com	191
172.66.128.106	uniformadvantage.com	189
172.66.134.14	winterhalter.ru	179
172.66.133.251	cotta.ge	138
172.66.131.246	opensocialcare.co.uk	120
172.66.137.113	montagehotels.com	109
172.66.136.32	cms.law	109
172.66.129.2	ossoffforsenate.net	102
172.66.132.213	dipentaerythritol.com	97
172.66.133.147	pcmatic.com	96
172.66.135.237	thetrevorproject.org	91

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
172.66.137.173	AS13335 Cloudflare, Inc.	`0.12ms` from Lima, PE
172.66.136.204	AS13335 Cloudflare, Inc.	`0.12ms` from Lima, PE
172.66.128.192	AS13335 Cloudflare, Inc.	`0.12ms` from Lisbon, PT
172.66.141.87	AS13335 Cloudflare, Inc.	`0.11ms` from Lima, PE
172.66.130.21	AS13335 Cloudflare, Inc.	`0.12ms` from Lima, PE
172.66.133.136	AS13335 Cloudflare, Inc.	`0.12ms` from Lisbon, PT
172.66.143.34	AS13335 Cloudflare, Inc.	`0.12ms` from Lisbon, PT
172.66.135.216	AS13335 Cloudflare, Inc.	`0.11ms` from Lisbon, PT
172.66.129.208	AS13335 Cloudflare, Inc.	`0.12ms` from Lima, PE
172.66.138.125	AS13335 Cloudflare, Inc.	`0.13ms` from Yerevan, AM
172.66.131.97	AS13335 Cloudflare, Inc.	`0.12ms` from Yerevan, AM
172.66.132.29	AS13335 Cloudflare, Inc.	`0.12ms` from Lima, PE
172.66.134.83	AS13335 Cloudflare, Inc.	`0.12ms` from Lisbon, PT
172.66.139.173	AS13335 Cloudflare, Inc.	`0.13ms` from Lisbon, PT
172.66.142.193	AS13335 Cloudflare, Inc.	`0.12ms` from Lisbon, PT
172.66.140.48	AS13335 Cloudflare, Inc.	`0.12ms` 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
154.247.80.180	AS36947 Telecom Algeria	`13.02ms` from Algiers, DZ
74.234.234.4	AS8075 Microsoft Corporation	`0.33ms` from Amsterdam, NL
189.16.27.4	AS4230 CLARO S.A.	`0.77ms` from Curitiba, BR
67.165.204.180	AS7922 Comcast Cable Communications, LLC	`6.09ms` from Denver, US
116.136.231.228	AS4837 CHINA UNICOM China169 Backbone	`6.43ms` from Hohhot, CN
86.156.176.68	AS2856 British Telecommunications PLC	`9.37ms` from London, GB
23.92.54.212	AS36352 HostPapa	`0.35ms` from Los Angeles, US
185.48.229.4	AS197540 netcup GmbH	`0.40ms` from Nuernberg, DE
174.112.209.196	AS812 Rogers Communications Canada Inc.	`6.74ms` from Ottawa, CA
91.165.192.68	AS12322 Free SAS	`3.29ms` from Paris, FR
20.169.114.228	AS8075 Microsoft Corporation	`1.16ms` from Phoenix, US
3.91.171.116	AS14618 Amazon.com, Inc.	`0.62ms` from Reston, US
38.99.27.132	AS174 Cogent Communications, LLC	`1.69ms` from San Jose, US
106.248.83.244	AS3786 LG DACOM Corporation	`1.84ms` from Seoul, KR
59.13.201.148	AS4766 Korea Telecom	`1.53ms` from Seoul, KR
178.43.104.196	AS5617 Orange Polska Spolka Akcyjna	`2.52ms` from Wrocław, PL
95.17.37.212	AS12479 Orange Espagne SA	`5.68ms` from Zaragoza, ES
42.238.72.244	AS4837 CHINA UNICOM China169 Backbone	`5.20ms` from Zhengzhou, CN
77.168.170.116	AS1136 KPN B.V.	`3.22ms` from Amsterdam, NL
125.24.17.100	AS23969 TOT Public Company Limited	`2.17ms` from Bangkok, TH
64.82.209.36	AS27419 Big River Telephone Company, LLC	`12.72ms` from Chicago, US
2.167.79.148	AS3320 Deutsche Telekom AG	`10.07ms` from Frankfurt am Main, DE
115.76.73.52	AS7552 Viettel Group	`3.62ms` from Ho Chi Minh City, VN
14.102.170.100	AS135025 Nexlogic Telecommunications Network, Inc.	`0.15ms` from Manila, PH
140.123.188.20	AS1659 Taiwan Academic Network (TANet) Information Center	`5.68ms` from Taipei, TW

Traceroute

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

traceroute -a -n -q1 -f4 172.66.143.234

traceroute to 172.66.143.234 (172.66.143.234): 64 hops max, 52 byte packets

4 [AS13335] 172.69.220.2 3.507 ms

5 [AS13335] 172.66.143.234 0.157 ms

Measurement taken from

IPinfo ProbeNet in Luxembourg, LU

On December 6th 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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