`nullmx.mctssa.com`

DNSSEC	⚠️ Not signed
A	2606:4700:3032::6815:2195^{🇺🇸 Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3035::ac43:9285^{🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.33.149^{Cloudflare104.21.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.146.133^{🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.33.149, 172.67.146.133
		IPv6 hints	2606:4700:3032::6815:2195, 2606:4700:3035::ac43:9285
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=168, name=cloudflare-ech.com

`mctssa.com`

DNSSEC	⚠️ Not signed
A	2606:4700:3032::6815:2195^{🇺🇸 Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3035::ac43:9285^{🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.33.149^{Cloudflare104.21.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.146.133^{🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`bob.ns.cloudflare.com` ⭐
NS	`holly.ns.cloudflare.com`
MX	`mail.protonmail.ch` ⭐
MX	`mailsec.protonmail.ch`⁽²⁰⁾
TXT	`protonmail-verification=24551a83f69aa1e21eb17513aa19bf147c0be9c7`
TXT	`v=spf1 include:_spf.protonmail.ch mx ~all`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.33.149, 172.67.146.133
		IPv6 hints	2606:4700:3032::6815:2195, 2606:4700:3035::ac43:9285
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=168, name=cloudflare-ech.com
SOA	`bob.ns.cloudflare.com`dns@cloudflare.com serial=2410741357

Previously MX for

mctssa.com

Same first word

nullmx.org

nullmx.com

nullmx.net

DNS History

7 records (4 active, 3 former)

●A104.21.33.1492026-03-11 → 2026-08-10 · 3 obs

○ 2015-10-22 22:44:02
● 2026-03-11 13:21:02
● 2026-08-10 15:55:16

●A172.67.146.1332026-03-11 → 2026-08-10 · 3 obs

○ 2015-10-22 22:44:02
● 2026-03-11 13:21:02
● 2026-08-10 15:55:16

○A209.181.247.1052008-03-16 → 2008-03-16 · 3 obs

● 2008-03-16 02:51:58
○ 2015-10-22 22:44:02
○ 2026-08-10 15:55:16

●A2606:4700:3032::6815:21952026-06-28 → 2026-08-10 · 3 obs

○ 2026-03-11 13:21:02
● 2026-06-28 21:41:10
● 2026-08-10 15:55:16

●A2606:4700:3035::ac43:92852026-06-28 → 2026-08-10 · 3 obs

○ 2026-03-11 13:21:02
● 2026-06-28 21:41:10
● 2026-08-10 15:55:16

○A2606:4700:3036::ac43:92852026-03-11 → 2026-03-11 · 4 obs

○ 2015-10-22 22:44:02
● 2026-03-11 13:21:02
○ 2026-06-28 21:41:10
○ 2026-08-10 15:55:16

○A2606:4700:3037::6815:21952026-03-11 → 2026-03-11 · 4 obs

○ 2015-10-22 22:44:02
● 2026-03-11 13:21:02
○ 2026-06-28 21:41:10
○ 2026-08-10 15:55:16

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	c.gtld-servers.net, h.gtld-servers.net, d.gtld-servers.net, f.gtld-servers.net...	-
mctssa.com	bob.ns.cloudflare.com, holly.ns.cloudflare.com	12 records

✅ Authoritative Response

Server:108.162.194.133

NS records: bob.ns.cloudflare.com, holly.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for mctssa.com (unsigned zone)

⏱️ Timing

Total: 133ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.21.33.149, 172.67.146.133`
AAAA	2	`2606:4700:3032::6815:2195, 2606:4700:3035::ac43:9285`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`

📌 Glue Records Collected

Total: 12

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

Analysis

IP Addresses

nullmx.mctssa.com directs to four IP numbers, which are 104.21.33.149, 172.67.146.133, 2606:4700:3032::6815:2195 and 2606:4700:3035::ac43:9285.

Additional host names — pjnetempresarialreducaodetaxas.ink, americanbizdirectory.com, pllsgnrc.shop and two others — share IP numbers with nullmx.mctssa.com.

nullmx.mctssa.com - robtex.com