www.master138ofc.com - robtex.com

www.master138ofc.com

DNSSEC⚠️ Not signed
A2606:4700:3030::ac43:c161🇺🇸 Cloudflare2606:4700:3030::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3031::6815:3c44🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.60.68Cloudflare104.21.48.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.193.97🇺🇸 Cloudflare172.67.192.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.60.68, 172.67.193.97
IPv6 hints2606:4700:3030::ac43:c161, 2606:4700:3031::6815:3c44
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=83, name=cloudflare-ech.com

master138ofc.com

DNSSEC⚠️ Not signed
A2606:4700:3030::ac43:c161🇺🇸 Cloudflare2606:4700:3030::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3031::6815:3c44🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.60.68Cloudflare104.21.48.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.193.97🇺🇸 Cloudflare172.67.192.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSheather.ns.cloudflare.com ⭐
NSrex.ns.cloudflare.com
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.60.68, 172.67.193.97
IPv6 hints2606:4700:3030::ac43:c161, 2606:4700:3031::6815:3c44
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=83, name=cloudflare-ech.com
SOAheather.ns.cloudflare.comdns@cloudflare.com serial=2406877977

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DNS History

6 records (4 active, 2 former)

A104.21.60.68172.67.193.972606:4700:3030::ac43:c1612606:4700:3031::6815:3c442606:4700:3036::6815:3c442606:4700:3037::ac43:c161
●A104.21.60.682026-03-06 → 2026-08-11 · 2 obs
● 2026-03-06 02:48:04
● 2026-08-11 20:54:22
●A172.67.193.972026-03-06 → 2026-08-11 · 2 obs
● 2026-03-06 02:48:04
● 2026-08-11 20:54:22
●A2606:4700:3030::ac43:c1612026-06-23 → 2026-08-11 · 3 obs
○ 2026-06-08 07:02:24
● 2026-06-23 02:35:48
● 2026-08-11 20:54:22
●A2606:4700:3031::6815:3c442026-06-23 → 2026-08-11 · 3 obs
○ 2026-06-08 07:02:24
● 2026-06-23 02:35:48
● 2026-08-11 20:54:22
○A2606:4700:3036::6815:3c442026-03-06 → 2026-06-08 · 4 obs
● 2026-03-06 02:48:04
● 2026-06-08 07:02:24
○ 2026-06-23 02:35:48
○ 2026-08-11 20:54:22
○A2606:4700:3037::ac43:c1612026-03-06 → 2026-06-08 · 4 obs
● 2026-03-06 02:48:04
● 2026-06-08 07:02:24
○ 2026-06-23 02:35:48
○ 2026-08-11 20:54:22

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
comm.gtld-servers.net, c.gtld-servers.net, f.gtld-servers.net, l.gtld-servers.net...-
master138ofc.comheather.ns.cloudflare.com, rex.ns.cloudflare.com12 records

✅ Authoritative Response

Server:108.162.192.161

NS records: heather.ns.cloudflare.com, rex.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for master138ofc.com (unsigned zone)

⏱️ Timing

Total: 123ms | Queries: -

📄 Records

TypeCountSample Data
A2172.67.193.97, 104.21.60.68
AAAA22606:4700:3031::6815:3c44, 2606:4700:3030::ac43:c161
HTTPS1{"priority":1,"target":".","alpn":["h3",

📌 Glue Records Collected

Total: 12

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

Analysis

IP Addresses

www.master138ofc.com points to the four IP addresses 104.21.60.68, 172.67.193.97, 2606:4700:3030::ac43:c161 and 2606:4700:3031::6815:3c44.

gergemzwijndrecht.nl, essltkch.com, apexcorexdynamics.buzz plus two other host names have IP numbers in common with www.master138ofc.com.