1. All IP Ranges
  2. 172.0.0.0/8
  3. 172.66.0.0/16
  4. AS13335  | 172.66.40.0/21

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:        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 384,605 domain names hosted across 1,060 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 81509
172.66.43.135 jetprintapp.com 81431
172.66.40.56 stackify.com 14028
172.66.43.200 aqar.fm 7580
172.66.40.99 manuals.plus 4532
172.66.43.157 manuals.plus 4231
172.66.47.131 ip77724.com 3019
172.66.44.125 3976e.com 2976
172.66.47.179 labubu-keychain.info 1580
172.66.44.77 zahcdco.cn 1546
172.66.40.89 mrguider.org 1488
172.66.40.193 javhub.net 1483
172.66.43.167 mrguider.org 1403
172.66.43.43 flexclip.com 1360
172.66.40.213 flexclip.com 1339
172.66.43.63 javhub.net 1279
172.66.41.48 screengeek.net 1237
172.66.42.208 screengeek.net 1173
172.66.44.93 bst-hydepark.com 1130
172.66.47.163 ip777bc.com 1125

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

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

IP Address ASN Details
172.66.47.197 AS13335 Cloudflare, Inc. 0.13ms from Yerevan, AM
172.66.40.196 AS13335 Cloudflare, Inc. 0.13ms from Johannesburg, ZA
172.66.43.41 AS13335 Cloudflare, Inc. 0.14ms from Yerevan, AM
172.66.44.219 AS13335 Cloudflare, Inc. 0.13ms from Yerevan, AM
172.66.41.172 AS13335 Cloudflare, Inc. 0.13ms from Lagos, NG
172.66.46.97 AS13335 Cloudflare, Inc. 0.14ms from Yerevan, AM
172.66.45.13 AS13335 Cloudflare, Inc. 0.13ms from Brisbane, AU
172.66.42.118 AS13335 Cloudflare, Inc. 0.13ms 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
52.179.2.101 AS8075 Microsoft Corporation 0.46ms from Ashburn, US
104.67.216.117 AS16625 Akamai Technologies, Inc. 0.48ms from Atlanta, US
120.48.20.21 AS38365 Beijing Baidu Netcom Science and Technology Co., Ltd. 3.11ms from Beijing, CN
195.228.224.117 AS5483 Magyar Telekom Plc. 0.56ms from Budapest, HU
68.203.243.85 AS11427 Charter Communications Inc 12.25ms from Dallas, US
46.22.129.37 AS39122 Blacknight Internet Solutions Limited 0.25ms from Dublin, IE
168.76.53.197 AS137951 ASLINE LIMITED 0.66ms from Hong Kong, HK
95.188.197.69 AS12389 PJSC Rostelecom 18.75ms from Krasnoyarsk, RU
184.107.182.101 AS32613 Leaseweb Canada Inc. 0.73ms from Montreal, CA
210.236.97.101 AS7665 Okayama Prefectural Government 14.80ms from Osaka, JP
199.19.61.5 AS46300 Valley Fiber Ltd. 15.19ms from Port Edwards, US
140.75.200.149 AS4134 CHINANET-BACKBONE 7.81ms from Qingdao, CN
200.29.50.245 AS7418 TELEFÓNICA CHILE S.A. 0.55ms from Santiago, CL
114.39.188.133 AS3462 Data Communication Business Group 3.68ms from Taichung, TW
154.43.68.69 AS174 Cogent Communications, LLC 6.38ms from Thessaloniki, GR
126.237.138.213 AS17676 SoftBank Corp. 3.19ms from Tokyo, JP
116.211.6.101 AS4809 China Telecom Next Generation Carrier Network 15.06ms from Wuhan, CN
178.208.81.117 AS216139 Iron Hosting Centre LTD 0.64ms from Amsterdam, NL
54.189.120.101 AS16509 Amazon.com, Inc. 0.15ms from Boardman, US
86.127.129.117 AS8708 DIGI ROMANIA S.A. 0.75ms from Bucharest, RO
122.138.244.5 AS4837 CHINA UNICOM China169 Backbone 9.39ms from Changchun, CN
186.225.35.53 AS28368 SOBRALNET SERVICOS E TELECOMUNICACOES LTDA - ME 0.99ms from Fortaleza, BR
191.100.58.85 AS27668 ETAPA EP 5.97ms from Guayaquil, EC
103.141.245.245 AS139365 PT PATRIA LINTAS JAYA 0.55ms from Jakarta, ID
77.47.199.21 AS25500 User Association of Ukrainian Research and Academic Network URAN 0.57ms from Kyiv, UA

Traceroute

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

$
traceroute -a -n -q1 -f4 172.66.41.240
traceroute to 172.66.41.240 (172.66.41.240): 64 hops max, 52 byte packets
4 [AS13335] 172.69.220.2 1.694 ms
Measurement taken from IPinfo ProbeNet in Luxembourg, LU
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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