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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:         rir@cloudflare.com
abuse-mailbox:  abuse@cloudflare.com
admin-c:        CTC15-AP
tech-c:         CTC15-AP
auth:           # Filtered
remarks:        rir@cloudflare.com was validated on 2026-03-25
remarks:        abuse@cloudflare.com was validated on 2026-04-10
irt-nfy:        rir@cloudflare.com
notify:         rir@cloudflare.com
mnt-by:         MAINT-CLOUDFLARE-AP
last-modified:  2026-04-10T14:53:05Z
source:         APNIC

role:           ABUSE CLOUDFLAREAP
country:        ZZ
address:        Cloudflare, Inc.
address:        101 Townsend Street, San Francisco CA 94107
phone:          +000000000
e-mail:         rir@cloudflare.com
admin-c:        CTC15-AP
tech-c:         CTC15-AP
nic-hdl:        AC1914-AP
remarks:        Generated from irt object IRT-CLOUDFLARE-AP
remarks:        rir@cloudflare.com was validated on 2026-03-25
remarks:        abuse@cloudflare.com was validated on 2026-04-10
abuse-mailbox:  abuse@cloudflare.com
mnt-by:         APNIC-ABUSE
last-modified:  2026-04-10T14:53:29Z
source:         APNIC

role:           Cloudflare Technical Contact
address:        101 Townsend Street, San Francisco CA 94107
country:        US
phone:          +1-650-319-8930
e-mail:         rir@cloudflare.com
admin-c:        CTC17-AP
tech-c:         CTC17-AP
nic-hdl:        CTC17-AP
notify:         rir@cloudflare.com
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:cb00:77::/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

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

IP Address	ASN	Details
2400:cb00:77:1024::a29e:e46d	AS13335 Cloudflare, Inc.	`15.10ms` from Hong Kong, HK

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
95.180.74.32	AS31042 Serbia BroadBand-Srpske Kablovske mreze d.o.o.	`7.26ms` from Belgrade, RS
51.48.67.80	AS16509 Amazon.com, Inc.	`5.64ms` from Madrid, ES
67.7.151.96	AS393789 CenturyLink Communications, LLC	`0.55ms` from Miami, US
45.226.215.80	AS267002 JV NETWEB	`1.14ms` from Novo Hamburgo, BR
18.235.117.176	AS14618 Amazon.com, Inc.	`0.22ms` from Reston, US
200.150.185.16	AS19182 TELEFÔNICA BRASIL S.A	`10.65ms` from Sao Paulo, BR
24.113.243.16	AS11404 Wave Broadband	`3.44ms` from Seattle, US
112.162.101.96	AS4766 Korea Telecom	`6.41ms` from Seoul, KR
163.20.93.240	AS1659 Taiwan Academic Network (TANet) Information Center	`2.60ms` from Taipei, TW
201.146.48.16	AS8151 UNINET	`9.64ms` from Tucson, US
96.35.95.160	AS20115 Charter Communications LLC	`12.46ms` from Chicago, US
75.211.240.240	AS6167 Verizon Business	`15.97ms` from Chicago, US
217.74.216.144	AS31027 GlobalConnect A/S	`0.36ms` from Copenhagen, DK
162.236.138.160	AS7018 AT&T Enterprises, LLC	`2.54ms` from Dallas, US
84.189.228.160	AS3320 Deutsche Telekom AG	`7.41ms` from Frankfurt am Main, DE
115.199.193.64	AS4134 CHINANET BACKBONE	`6.67ms` from Hangzhou, CN
39.109.23.240	AS140224 Nebula Global LLC	`0.71ms` from Hong Kong, HK
95.148.141.32	AS2856 British Telecommunications PLC	`10.98ms` from London, GB
18.155.168.0	AS16509 Amazon.com, Inc.	`0.23ms` from Phoenix, US
34.235.57.80	AS14618 Amazon.com, Inc.	`0.23ms` from Reston, US
66.62.123.0	AS21632 Cybernet1	`0.59ms` from Seattle, US
76.52.252.176	AS11426 Charter Communications Inc	`10.65ms` from Charlotte, US
211.248.21.96	AS4766 Korea Telecom	`2.18ms` from Incheon, KR
36.93.181.16	AS7713 PT Telekomunikasi Indonesia	`6.40ms` from Jakarta, ID
88.196.237.240	AS3249 Telia Eesti AS	`2.31ms` from Jõhvi, EE

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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