mail.jstem.org - robtex.com

mail.jstem.org

DNSSEC⚠️ Not signed
A2606:4700:3032::6815:3ef9🇺🇸 Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3034::ac43:8d3a🇺🇸 Cloudflare2606:4700:3034::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.62.249Cloudflare104.21.48.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.141.58🇺🇸 Cloudflare172.67.128.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.62.249, 172.67.141.58
IPv6 hints2606:4700:3032::6815:3ef9, 2606:4700:3034::ac43:8d3a
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=220, name=cloudflare-ech.com

jstem.org

DNSSEC⚠️ Not signed
A2606:4700:3032::6815:3ef9🇺🇸 Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3034::ac43:8d3a🇺🇸 Cloudflare2606:4700:3034::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.62.249Cloudflare104.21.48.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.141.58🇺🇸 Cloudflare172.67.128.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSamir.ns.cloudflare.com ⭐
NSkate.ns.cloudflare.com
MX_dc-mx.ade4a120a8cc.jstem.org ⭐
TXTv=spf1 +ip4:162.144.0.229 +ip4:198.57.247.157 ~all
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.62.249, 172.67.141.58
IPv6 hints2606:4700:3032::6815:3ef9, 2606:4700:3034::ac43:8d3a
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=220, name=cloudflare-ech.com
SOAamir.ns.cloudflare.comdns@cloudflare.com serial=2404259904
rank #981603 globally
rank #77441 in the tld

Previously MX for

jstem.org

Same first word

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DNS History

5 records (4 active, 1 former)

20162017201820192020202120222023202420252026A104.21.62.249172.67.141.582606:4700:3032::6815:3ef92606:4700:3034::ac43:8d3a23.229.171.34
●A104.21.62.2492026-05-09 → 2026-05-15 · 3 obs
○ 2016-07-14 00:16:12
● 2026-05-09 18:33:26
● 2026-05-15 00:16:46
●A172.67.141.582026-05-09 → 2026-05-15 · 3 obs
○ 2016-07-14 00:16:12
● 2026-05-09 18:33:26
● 2026-05-15 00:16:46
○A23.229.171.342015-08-03 → 2016-07-14 · 4 obs
● 2015-08-03 12:50:08
● 2016-07-14 00:16:12
○ 2026-05-09 18:33:26
○ 2026-05-15 00:16:46
●A2606:4700:3032::6815:3ef92026-05-09 → 2026-05-15 · 3 obs
○ 2016-07-14 00:16:12
● 2026-05-09 18:33:26
● 2026-05-15 00:16:46
●A2606:4700:3034::ac43:8d3a2026-05-09 → 2026-05-15 · 3 obs
○ 2016-07-14 00:16:12
● 2026-05-09 18:33:26
● 2026-05-15 00:16:46

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
orgb0.org.afilias-nst.org, b2.org.afilias-nst.org, d0.org.afilias-nst.org-
jstem.orgkate.ns.cloudflare.com, amir.ns.cloudflare.com-

✅ Authoritative Response

Server:172.64.32.124

NS records: kate.ns.cloudflare.com, amir.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for jstem.org (unsigned zone)

⏱️ Timing

Total: 349ms | Queries: -

📄 Records

TypeCountSample Data
A2172.67.141.58, 104.21.62.249
AAAA22606:4700:3032::6815:3ef9, 2606:4700:3034::ac43:8d3a
HTTPS1{"priority":1,"target":".","alpn":["h3",

Analysis

IP Addresses

Four IP numbers are pointed to by mail.jstem.org: 2606:4700:3032::6815:3ef9, 2606:4700:3034::ac43:8d3a, 104.21.62.249 and 172.67.141.58.

other host names including www.webtechniques.com, www.brickis.red, rtpslotluna626.com, wisefinancea-dvisory.click and redhat.dspoke.com share IP numbers with mail.jstem.org.