mail.letteracollaborative.com - robtex.com

mail.letteracollaborative.com

DNSSEC⚠️ Not signed
A2606:4700:3031::6815:2f74🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3037::ac43:937d🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.47.116Cloudflare104.21.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.147.125🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.47.116, 172.67.147.125
IPv6 hints2606:4700:3031::6815:2f74, 2606:4700:3037::ac43:937d
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=174, name=cloudflare-ech.com

letteracollaborative.com

DNSSEC⚠️ Not signed
A2606:4700:3031::6815:2f74🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3037::ac43:937d🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.47.116Cloudflare104.21.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.147.125🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSbart.ns.cloudflare.com ⭐
NSmary.ns.cloudflare.com
MX_dc-mx.22a4421b9879.letteracollaborative.com ⭐
TXTv=spf1 +a +mx +ip4:66.147.244.189 ?all
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.47.116, 172.67.147.125
IPv6 hints2606:4700:3031::6815:2f74, 2606:4700:3037::ac43:937d
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=119, name=cloudflare-ech.com
SOAbart.ns.cloudflare.comdns@cloudflare.com serial=2401651390

Previously MX for

letteracollaborative.com

Same first word

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DNS History

5 records (4 active, 1 former)

20162017201820192020202120222023202420252026A104.21.47.116172.67.147.1252606:4700:3031::6815:2f742606:4700:3037::ac43:937d50.87.217.23
●A104.21.47.1162026-04-24 → 2026-04-24 · 2 obs
○ 2016-04-08 09:20:32
● 2026-04-24 14:07:30
●A172.67.147.1252026-04-24 → 2026-04-24 · 2 obs
○ 2016-04-08 09:20:32
● 2026-04-24 14:07:30
●A2606:4700:3031::6815:2f742026-04-24 → 2026-04-24 · 2 obs
○ 2016-04-08 09:20:32
● 2026-04-24 14:07:30
●A2606:4700:3037::ac43:937d2026-04-24 → 2026-04-24 · 2 obs
○ 2016-04-08 09:20:32
● 2026-04-24 14:07:30
○A50.87.217.232015-06-12 → 2016-04-08 · 3 obs
● 2015-06-12 17:36:34
● 2016-04-08 09:20:32
○ 2026-04-24 14:07:30

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
coma.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...-
letteracollaborative.combart.ns.cloudflare.com, mary.ns.cloudflare.com12 records

✅ Authoritative Response

Server:108.162.193.71

NS records: bart.ns.cloudflare.com, mary.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for letteracollaborative.com (unsigned zone)

⏱️ Timing

Total: 60ms | Queries: -

📄 Records

TypeCountSample Data
A2104.21.47.116, 172.67.147.125
AAAA22606:4700:3031::6815:2f74, 2606:4700:3037::ac43:937d
HTTPS1{"priority":1,"target":".","alpn":["h3",

📌 Glue Records Collected

Total: 12

Out-of-bailiwick: 12 (bart.ns.cloudflare.com, bart.ns.cloudflare.com, bart.ns.cloudflare.com...)

Analysis

IP Addresses

Four IP numbers are pointed to by mail.letteracollaborative.com: 2606:4700:3031::6815:2f74, 2606:4700:3037::ac43:937d, 104.21.47.116 and 172.67.147.125.

other host names including www.stepgroup.co, undol.com, blog.lidyana.com, cdn.4oimage.ai and fat(0x65726f746963).com share IP numbers with mail.letteracollaborative.com.