mailserver.rtcw.org - robtex.com

mailserver.rtcw.org

DNSSEC⚠️ Not signed
A2606:4700:3030::6815:8ee🇺🇸 Cloudflare2606:4700:3030::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3035::ac43:9e1e🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.8.238Cloudflare104.21.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.158.30🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4104.21.8.238, 172.67.158.30
IPv62606:4700:3030::6815:8ee, 2606:4700:3035::ac43:9e1e

rtcw.org

DNSSEC⚠️ Not signed
A2606:4700:3030::6815:8ee🇺🇸 Cloudflare2606:4700:3030::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3035::ac43:9e1e🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.8.238Cloudflare104.21.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.158.30🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSisabel.ns.cloudflare.com ⭐
NSjaxson.ns.cloudflare.com
MXrtcw-org.mail.protection.outlook.com ⭐
TXTgoogle-site-verification=qVRXUtvnoPAhna1yJB1LMsYIjqvKyHurHGu7r71TeMA
TXTv=spf1 include:spf.protection.outlook.com -all
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4104.21.8.238, 172.67.158.30
IPv62606:4700:3030::6815:8ee, 2606:4700:3035::ac43:9e1e
SOAisabel.ns.cloudflare.comdns@cloudflare.com serial=2399512429
WOT: SAFE (64/100)
WOT: SAFE (80/100)

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DNS History

6 records (4 active, 2 former)

20162017201820192020202120222023202420252026A104.21.8.238172.67.158.302606:4700:3030::6815:8ee2606:4700:3035::ac43:9e1e172.64.80.191.85.154.233
●A104.21.8.2382026-02-18 → 2026-03-24 · 6 obs
○ 2016-09-24 18:52:00
● 2026-02-18 22:15:38
● 2026-02-19 23:21:46
○ 2026-02-27 03:50:40
● 2026-02-27 04:32:44
● 2026-03-24 16:28:20
○A172.64.80.12026-02-27 → 2026-02-27 · 4 obs
○ 2026-02-19 23:21:46
● 2026-02-27 03:50:40
○ 2026-02-27 04:32:44
○ 2026-03-24 16:28:20
●A172.67.158.302026-02-18 → 2026-03-24 · 6 obs
○ 2016-09-24 18:52:00
● 2026-02-18 22:15:38
● 2026-02-19 23:21:46
○ 2026-02-27 03:50:40
● 2026-02-27 04:32:44
● 2026-03-24 16:28:20
●A2606:4700:3030::6815:8ee2026-02-18 → 2026-03-24 · 3 obs
○ 2016-09-24 18:52:00
● 2026-02-18 22:15:38
● 2026-03-24 16:28:20
●A2606:4700:3035::ac43:9e1e2026-02-18 → 2026-03-24 · 3 obs
○ 2016-09-24 18:52:00
● 2026-02-18 22:15:38
● 2026-03-24 16:28:20
○A91.85.154.2332015-06-12 → 2016-09-24 · 4 obs
● 2015-06-12 14:46:28
● 2016-09-24 18:52:00
○ 2026-02-18 22:15:38
○ 2026-03-24 16:28:20

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
orgd0.org.afilias-nst.org, b0.org.afilias-nst.org, b2.org.afilias-nst.org-
rtcw.orgisabel.ns.cloudflare.com, jaxson.ns.cloudflare.com-

✅ Authoritative Response

Server:172.64.35.221

NS records: isabel.ns.cloudflare.com, jaxson.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for rtcw.org (unsigned zone)

⏱️ Timing

Total: 347ms | Queries: -

📄 Records

TypeCountSample Data
A2104.21.8.238, 172.67.158.30
AAAA22606:4700:3035::ac43:9e1e, 2606:4700:3030::6815:8ee
HTTPS1{"priority":1,"target":".","alpn":["h3",

Analysis

IP Addresses

mailserver.rtcw.org resolves to four IPs: 2606:4700:3030::6815:8ee, 2606:4700:3035::ac43:9e1e, 104.21.8.238 and 172.67.158.30.

Other host names, for instance mensquare.com, blt-web.com, www.presente.co, dvld.cn and withncompany.com share IP numbers with mailserver.rtcw.org.