jeffstern.co - robtex.com

jeffstern.co

DNSSEC⚠️ Not signed
A2606:4700:3030::ac43:84cd🇺🇸 Cloudflare2606:4700:3030::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3036::6815:d69🇺🇸 Cloudflare2606:4700:3036::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.13.105Cloudflare104.21.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.132.205🇺🇸 Cloudflare172.67.128.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSarmfazh.ns.cloudflare.com ⭐
A2606:4700:58::a29f:2c68🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRarmfazh.ns.cloudflare.com
A2803:f800:50::6ca2:c368🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRarmfazh.ns.cloudflare.com
A2a06:98c1:50::ac40:2368🇺🇸 Cloudflare2a06:98c1:50::/45
PTRarmfazh.ns.cloudflare.com
A108.162.195.104🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRarmfazh.ns.cloudflare.com
A162.159.44.104Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRarmfazh.ns.cloudflare.com
A172.64.35.104🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRarmfazh.ns.cloudflare.com
NSgene.ns.cloudflare.com
A2606:4700:50::adf5:3a9e🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRgene.ns.cloudflare.com
A2803:f800:50::6ca2:c09e🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRgene.ns.cloudflare.com
A2a06:98c1:50::ac40:209e🇺🇸 Cloudflare2a06:98c1:50::/45
PTRgene.ns.cloudflare.com
A108.162.192.158🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRgene.ns.cloudflare.com
A172.64.32.158🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRgene.ns.cloudflare.com
A173.245.58.158🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRgene.ns.cloudflare.com
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.13.105, 172.67.132.205
IPv6 hints2606:4700:3030::ac43:84cd, 2606:4700:3036::6815:d69
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=43, name=cloudflare-ech.com
SOAarmfazh.ns.cloudflare.comdns@cloudflare.com serial=2411490956

co

DNSSEC🔒 Signed (DS record present)
NSns0.centralnic.net ⭐
NSa.registrydns.co
NSb.registrydns.co
NSc.registrydns.co
NSd.registrydns.co
SOAns0.centralnic.nethostmaster@centralnic.net serial=1759732407

Previously MX for

jeffstern.co

Same first word

jeffstern.co
jeffstern.com

DNS History

15 records (6 active, 9 former)

20162017201820192020202120222023202420252026NSarmfazh.ns.cloudflare.comgene.ns.cloudflare.comns3595.hostgator.comns3596.hostgator.comns6391.hostgator.comMXjeffstern.coA104.21.13.105172.67.132.2052606:4700:3030::ac43:84cd2606:4700:3036::6815:d69188.114.96.0188.114.97.0192.254.190.1092a06:98c1:3120::2a06:98c1:3121::
●NSarmfazh.ns.cloudflare.com2026-08-09 → 2026-08-13 · 3 obs
○ 2017-08-18 10:49:46
● 2026-08-09 20:16:02
● 2026-08-13 20:17:04
●NSgene.ns.cloudflare.com2026-08-09 → 2026-08-13 · 3 obs
○ 2017-08-18 10:49:46
● 2026-08-09 20:16:02
● 2026-08-13 20:17:04
○NSns3595.hostgator.com2015-08-21 → 2017-08-18 · 4 obs
● 2015-08-21 00:03:34
● 2017-08-18 10:49:46
○ 2026-08-09 20:16:02
○ 2026-08-13 20:17:04
○NSns3596.hostgator.com2015-08-21 → 2017-08-18 · 4 obs
● 2015-08-21 00:03:34
● 2017-08-18 10:49:46
○ 2026-08-09 20:16:02
○ 2026-08-13 20:17:04
○NSns6391.hostgator.com2015-08-21 → 2017-08-18 · 4 obs
● 2015-08-21 00:03:34
● 2017-08-18 10:49:46
○ 2026-08-09 20:16:02
○ 2026-08-13 20:17:04
○MXjeffstern.co2015-08-21 → 2017-08-18 · 4 obs
● 2015-08-21 00:03:34
● 2017-08-18 10:49:46
○ 2026-08-09 20:16:02
○ 2026-08-13 20:17:04
●A104.21.13.1052026-08-13 → 2026-08-13 · 2 obs
○ 2026-08-09 20:16:02
● 2026-08-13 20:17:04
●A172.67.132.2052026-08-13 → 2026-08-13 · 2 obs
○ 2026-08-09 20:16:02
● 2026-08-13 20:17:04
○A188.114.96.02026-08-09 → 2026-08-09 · 3 obs
○ 2017-08-18 10:49:46
● 2026-08-09 20:16:02
○ 2026-08-13 20:17:04
○A188.114.97.02026-08-09 → 2026-08-09 · 3 obs
○ 2017-08-18 10:49:46
● 2026-08-09 20:16:02
○ 2026-08-13 20:17:04
○A192.254.190.1092015-08-21 → 2017-08-18 · 4 obs
● 2015-08-21 00:03:34
● 2017-08-18 10:49:46
○ 2026-08-09 20:16:02
○ 2026-08-13 20:17:04
●A2606:4700:3030::ac43:84cd2026-08-13 → 2026-08-13 · 2 obs
○ 2026-08-09 20:16:02
● 2026-08-13 20:17:04
●A2606:4700:3036::6815:d692026-08-13 → 2026-08-13 · 2 obs
○ 2026-08-09 20:16:02
● 2026-08-13 20:17:04
○A2a06:98c1:3120::2026-08-09 → 2026-08-09 · 3 obs
○ 2017-08-18 10:49:46
● 2026-08-09 20:16:02
○ 2026-08-13 20:17:04
○A2a06:98c1:3121::2026-08-09 → 2026-08-09 · 3 obs
○ 2017-08-18 10:49:46
● 2026-08-09 20:16:02
○ 2026-08-13 20:17:04

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
coa.registrydns.co, b.registrydns.co, c.registrydns.co, d.registrydns.co-
jeffstern.coarmfazh.ns.cloudflare.com, gene.ns.cloudflare.com-

✅ Authoritative Response

Server:108.162.195.104

NS records: armfazh.ns.cloudflare.com, gene.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for jeffstern.co (unsigned zone)

⏱️ Timing

Total: 210ms | Queries: -

📄 Records

TypeCountSample Data
A2172.67.132.205, 104.21.13.105
AAAA22606:4700:3036::6815:d69, 2606:4700:3030::ac43:84cd
NS2armfazh.ns.cloudflare.com, gene.ns.cloudflare.com
HTTPS1{"priority":1,"target":".","alpn":["h3",
SOA1armfazh.ns.cloudflare.com dns.cloudflare

Analysis

IP Addresses

jeffstern.co directs to four IP numbers, which are 104.21.13.105, 172.67.132.205, 2606:4700:3030::ac43:84cd and 2606:4700:3036::6815:d69.

Among the host names that share IP numbers with jeffstern.co are tech-magazine.it, www.joshlam.com.cdn.cloudflare.net, modernbingofinder.uk and two others.

Name Servers

jeffstern.co is served by two delegated name servers, armfazh.ns.cloudflare.com and gene.ns.cloudflare.com.

jeffstern.co has the same name server delegation as a number of other domains, such as g-brain.net, xxoso66.io, amateure.eu.com and two more.

There is at least partial name server overlap between jeffstern.co and other domains — enautica.net, nabtta.com, isoc.org.ec and two more among them.

These name servers frequently co-occur with the name servers renan.ns.cloudflare.com and violet.ns.cloudflare.com.

Host names resolving to 6 IP numbers:

armfazh.ns.cloudflare.com carries IP addresses 108.162.195.104, 162.159.44.104 and 172.64.35.104, with 3 other addresses beyond those.

gene.ns.cloudflare.com carries IP addresses 108.162.192.158, 172.64.32.158 and 173.245.58.158, with 3 other addresses beyond those.