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Summary

Country	United States
Domain	cloudflare.com
ASN	AS13335
Registry	APNIC
ID	CLOUDFLARE_2400_CB00_0000_36

WHOIS Details

inet6num:       2400:cb00::/36
netname:        CLOUDFLARE_2400_CB00_0000_36
descr:          Cloudflare, Inc.
descr:          101 Townsend Street, San Francisco CA 94107
country:        US
admin-c:        CTC17-AP
tech-c:         CTC17-AP
abuse-c:        AC1914-AP
status:         ALLOCATED NON-PORTABLE
mnt-by:         MAINT-CLOUDFLARE-AP
mnt-irt:        IRT-CLOUDFLARE-AP
last-modified:  2021-01-13T23:48:10Z
source:         APNIC

irt:            IRT-CLOUDFLARE-AP
address:        Cloudflare, Inc.
address:        101 Townsend Street, San Francisco CA 94107
e-mail:         [email protected]
abuse-mailbox:  [email protected]
admin-c:        CTC15-AP
tech-c:         CTC15-AP
auth:           # Filtered
remarks:        [email protected] was validated on 2025-09-03
remarks:        [email protected] was validated on 2025-09-03
irt-nfy:        [email protected]
notify:         [email protected]
mnt-by:         MAINT-CLOUDFLARE-AP
last-modified:  2025-11-18T00:27:02Z
source:         APNIC

role:           ABUSE CLOUDFLAREAP
country:        ZZ
address:        Cloudflare, Inc.
address:        101 Townsend Street, San Francisco CA 94107
phone:          +000000000
e-mail:         [email protected]
admin-c:        CTC15-AP
tech-c:         CTC15-AP
nic-hdl:        AC1914-AP
remarks:        Generated from irt object IRT-CLOUDFLARE-AP
remarks:        [email protected] was validated on 2025-09-03
remarks:        [email protected] was validated on 2025-09-03
abuse-mailbox:  [email protected]
mnt-by:         APNIC-ABUSE
last-modified:  2025-09-04T17:10:37Z
source:         APNIC

role:           Cloudflare Technical Contact
address:        101 Townsend Street, San Francisco CA 94107
country:        US
phone:          +1-650-319-8930
e-mail:         [email protected]
admin-c:        CTC17-AP
tech-c:         CTC17-AP
nic-hdl:        CTC17-AP
notify:         [email protected]
mnt-by:         MAINT-CLOUDFLARE-AP
last-modified:  2017-09-07T21:57:11Z
source:         APNIC

route6:         2400:cb00::/36
origin:         AS13335
descr:          Cloudflare, Inc. 101 Townsend Street
mnt-by:         MAINT-CLOUDFLARE-AP
last-modified:  2020-06-10T00:00:34Z
source:         APNIC

Nearby Ranges

BGP prefixes that overlap with 2400:cb00:72::/48

No nearby ranges found.

Hosted domains

There are no domains currently hosted on this ASN.

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

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

IP Address	ASN	Details
2400:cb00:72:1024::8d65:6d33	AS13335 Cloudflare, Inc.	`7.71ms` from Chicago, US

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
217.146.179.144	AS34010 Yahoo-UK Limited	`0.36ms` from Dublin, IE
180.117.52.192	AS4134 CHINANET-BACKBONE	`7.45ms` from Huai'an, CN
174.81.23.208	AS20115 Charter Communications LLC	`6.00ms` from Los Angeles, US
83.63.9.96	AS3352 TELEFONICA DE ESPANA S.A.U.	`9.08ms` from Madrid, ES
71.199.219.32	AS7922 Comcast Cable Communications, LLC	`9.02ms` from Miami, US
141.101.248.16	AS205387 Hybrid LLC	`1.21ms` from Moscow, RU
119.243.24.0	AS2518 BIGLOBE Inc.	`4.80ms` from Osaka, JP
142.93.80.96	AS14061 DigitalOcean, LLC	`0.26ms` from San Jose, US
38.248.245.240	AS214483 FiberPower LLC	`0.25ms` from Santa Clara, US
203.152.171.0	AS10036 DLIVE	`1.87ms` from Seoul, KR
14.67.31.224	AS4766 Korea Telecom	`2.13ms` from Seoul, KR
14.0.113.144	AS54994 Meteverse Limited.	`0.67ms` from Seoul, KR
8.155.94.224	AS37963 Hangzhou Alibaba Advertising Co.,Ltd.	`1.70ms` from Shenzhen, CN
165.99.122.160	AS149827 TECHD Group	`0.66ms` from Sydney, AU
46.249.116.0	AS16509 Amazon.com, Inc.	`0.17ms` from Tokyo, JP
60.121.106.144	AS17676 SoftBank Corp.	`3.13ms` from Tokyo, JP
223.133.213.112	AS2527 Sony Network Communications Inc.	`7.23ms` from Tokyo, JP
52.143.51.160	AS8075 Microsoft Corporation	`0.25ms` from Amsterdam, NL
145.223.75.48	AS47583 Hostinger International Limited	`0.73ms` from Boston, US
218.77.2.224	AS4134 CHINANET-BACKBONE	`6.90ms` from Chenzhou, CN
120.232.77.112	AS9808 China Mobile Communications Group Co., Ltd.	`3.49ms` from Guangzhou, CN
193.206.183.144	AS137 Consortium GARR	`2.49ms` from Milan, IT
184.153.177.32	AS11351 Charter Communications Inc	`19.57ms` from New York City, US
71.183.96.96	AS701 Verizon Business	`2.77ms` from New York City, US
189.46.45.96	AS27699 TELEFÔNICA BRASIL S.A	`2.27ms` from Osasco, BR

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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