Hosting check
Who hosts twitter.com?
twitter.com is behind Cloudflare, which hides the origin host. DNS by twtrdns.net. Email by Google Workspace.
Checked 14 Oct 2026 at 10:08 UTC
Server
Anycast: nearest of many locations
172.66.0.227
Cloudflare, Inc. · AS13335
🇺🇸San Francisco, United States
Checks
4 of 6 checks pass
Warnings are worth a look, but nothing is broken.
Hosting provider
Low confidence
Cloudflare
CDNOrigin host hidden. A CDN answers for this site and hides the origin server, so the real host is not visible from outside.
- CDN
Cloudflarecloudflare.com
Answers every request and forwards it to an origin server it does not reveal. The IP address below belongs to the CDN.
- Network
Owns the IP address that answered our lookup.
How we know
2 signals- NetworkAS13335Cloudflare
- Headercf-ray: a4a5c877aac48d9e-HELCloudflare
IP & network
172.66.0.227 · San Francisco
- IP address
- 172.66.0.227
- Network
- Cloudflare, Inc.AS13335 · hosting
- Route
- 172.66.0.0/22
- Location
- San Francisco, California, United StatesAnycast: where our lookup landed
- Timezone
- America/Los_Angeles
This is an anycast address: many locations announce it, and each visitor reaches the nearest one. The location above is only where our lookup landed.
Coordinates, postal code and company
Geolocation describes the network's registered location, not a street address. For a data center IP the postal code and coordinates are approximate.
- Coordinates
- 37.7621,-122.3971
- Postal code
- 94107
- Country code
- US
DNS records
39 records in 5 types
- A
1 record
IPv4 addresses the name points to
- 172.66.0.227
- NS
8 records
Nameservers that answer for the zone
- a.r06.twtrdns.net
- a.u06.twtrdns.net
- b.r06.twtrdns.net
- b.u06.twtrdns.net
- c.r06.twtrdns.net
- c.u06.twtrdns.net
- d.r06.twtrdns.net
- d.u06.twtrdns.net
- MX
5 records
Mail servers, lowest priority first
- 1 aspmx.l.google.com
- 10 alt3.aspmx.l.google.com
- 10 alt4.aspmx.l.google.com
- 5 alt1.aspmx.l.google.com
- 5 alt2.aspmx.l.google.com
- SOA
1 record
Zone authority: primary nameserver, admin mailbox and timers
- a.u06.twtrdns.net noc.twitter.com 2024168602 3600 600 604800 7200
- TXT
24 records
1 SPF policy, 18 ownership proofs, 5 other
- 0a8c0fc6-bfa5-4ea7-b09b-87f2989022d6
- MS=BEE202D20C326867290BDEFA2DDDF4594B5D6860
- adobe-idp-site-verification=a2ff8fc40c434d1d6f02f68b0b1a683e400572ab8c1f2c180c71c3d985b9270a
- apple-domain-verification=zd1iHoEO9LILEQIq
SSL certificate
- Status
- Valid certificateTrusted by browsers and covers twitter.com. Expires in 74 days.
- Issuer
- Let's Encrypt (YR1)
- Common name
- *.twitter.com
- Protocol
- TLSv1.3
- Valid from
- September 28, 2026 at 07:44 PM UTC
- Valid to
- December 27, 2026 at 07:44 PM UTCExpires in 74 days
Covered hostnames
3 names- *.twitter.com
- cdn.syndication.twitter.com
- twitter.com
Certificate chain
4 certificates*.twitter.com
Server certificate · Issued by Let's Encrypt (YR1) · Valid to 27 Dec 2026
Let's Encrypt (YR1)
Intermediate · Issued by ISRG (Root YR) · Valid to 02 Sept 2028
ISRG (Root YR)
Intermediate · Issued by Internet Security Research Group (ISRG Root X1) · Valid to 02 Sept 2032
Internet Security Research Group (ISRG Root X1)
Root · Valid to 04 Jun 2035
Serial number and fingerprints
- Serial number
- 051CD1AEFBDE89DFB59B403786AAC2CF0A2F
- SHA-256
- CC:34:72:70:C2:09:A6:F2:9E:DF:C4:E2:C0:57:21:7D:1E:6D:74:A9:78:6B:AB:9C:F7:1E:E1:7C:4B:6E:F8:11
- SHA-1
- 97:B1:E9:AB:01:B9:A6:5B:DB:7A:BB:81:FB:7B:C4:47:79:21:08:9B
Domain registration
Registered 21 Jan 2000
Expires in 99 daysRegistration data for twitter.com, from the registry's RDAP or WHOIS service.
- Registrar
- CSC Corporate Domains, Inc.IANA ID 299
- Registrant
- Twitter, Inc.US
- Registered
- 21 Jan 200026 years, 8 months old
- Expires
- 21 Jan 2027Expires in 99 days
- Last updated
- 17 Jan 2026
- DNSSEC
- Unsigned
- Abuse email
- domainabuse@cscglobal.com
- Abuse phone
- 8887802723
Status
Nameservers
8 nameservers- a.r06.twtrdns.net
- a.u06.twtrdns.net
- b.r06.twtrdns.net
- b.u06.twtrdns.net
- c.r06.twtrdns.net
- c.u06.twtrdns.net
- d.r06.twtrdns.net
- d.u06.twtrdns.net
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Run this lookup from code
The API returns this result as JSON. The free plan includes 100 API calls per month.
curl "https://hostingchecker.online/api/v1/check?query=twitter.com" \
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