htmlvalidator.app - dns.ninja

`htmlvalidator.app`

DNSSEC	⚠️ Not signed
A	164.90.199.205^{🇳🇱 DIGITALOCEAN164.90.192.0/20 DigitalOcean}
NS	`ns1.messagingengine.com` ⭐
		A	162.159.24.178^{Cloudflare162.159.24.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ns1.messagingengine.com`
NS	`ns2.messagingengine.com`
		A	162.159.25.191^{Cloudflare162.159.25.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ns2.messagingengine.com`
MX	`in1-smtp.messagingengine.com` ⭐
		A	103.168.172.216^{🇺🇸 FASTMAILPTYLTD-AS-AP103.168.172.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`phl-mx-01.messagingengine.com`
		A	103.168.172.217^{🇺🇸 FASTMAILPTYLTD-AS-AP103.168.172.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`phl-mx-02.messagingengine.com`
		A	103.168.172.218^{🇺🇸 FASTMAILPTYLTD-AS-AP103.168.172.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`phl-mx-03.messagingengine.com`
		A	103.168.172.219^{🇺🇸 FASTMAILPTYLTD-AS-AP103.168.172.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`phl-mx-04.messagingengine.com`
		A	103.168.172.220^{🇺🇸 FASTMAILPTYLTD-AS-AP103.168.172.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`phl-mx-05.messagingengine.com`
		A	103.168.172.221^{🇺🇸 FASTMAILPTYLTD-AS-AP103.168.172.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`phl-mx-06.messagingengine.com`
		A	103.168.172.222^{🇺🇸 FASTMAILPTYLTD-AS-AP103.168.172.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`phl-mx-07.messagingengine.com`
		A	103.168.172.223^{🇺🇸 FASTMAILPTYLTD-AS-AP103.168.172.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`phl-mx-08.messagingengine.com`
MX	`in2-smtp.messagingengine.com`⁽²⁰⁾
		A	202.12.124.216^{FASTMAILPTYLTD-AS-AP202.12.124.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`stl-mx-01.messagingengine.com`
		A	202.12.124.217^{FASTMAILPTYLTD-AS-AP202.12.124.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`stl-mx-02.messagingengine.com`
		A	202.12.124.218^{FASTMAILPTYLTD-AS-AP202.12.124.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`stl-mx-03.messagingengine.com`
		A	202.12.124.219^{FASTMAILPTYLTD-AS-AP202.12.124.0/24 Fastmail Pty Ltd Level 2, 114 William Street}
			PTR	`stl-mx-04.messagingengine.com`
TXT	`v=spf1 include:spf.messagingengine.com ?all`
TXT	`google-site-verification=jq3l7_jXg2oVd6vqov7quKvXrVsBr6agja5HabUYLC0`
SOA	`ns1.messagingengine.com`postmaster@messagingengine.com 2026-05-21 #0

`app`

	DNSSEC	🔒 Signed (DS record present)
	NS	`ns-tld1.charlestonroadregistry.com` ⭐
	NS	`ns-tld2.charlestonroadregistry.com`
	NS	`ns-tld3.charlestonroadregistry.com`
	NS	`ns-tld4.charlestonroadregistry.com`
	NS	`ns-tld5.charlestonroadregistry.com`
	SOA	`ns-tld1.charlestonroadregistry.com`cloud-dns-hostmaster@google.com serial=101427

🔒 HSTS Preload (+subdomains)

Same first word

htmlvalidator.app

htmlvalidator.com

DNS History

5 records (5 active, 0 former)

●NSns1.messagingengine.com2026-05-07 → 2026-06-14 · 2 obs

● 2026-05-07 09:20:30
● 2026-06-14 20:12:06

●NSns2.messagingengine.com2026-05-07 → 2026-06-14 · 2 obs

● 2026-05-07 09:20:30
● 2026-06-14 20:12:06

●MXin1-smtp.messagingengine.com2026-05-07 → 2026-06-14 · 2 obs

● 2026-05-07 09:20:30
● 2026-06-14 20:12:06

●MXin2-smtp.messagingengine.com2026-05-07 → 2026-06-14 · 2 obs

● 2026-05-07 09:20:30
● 2026-06-14 20:12:06

●A164.90.199.2052026-05-07 → 2026-06-14 · 2 obs

● 2026-05-07 09:20:30
● 2026-06-14 20:12:06

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
app	ns-tld1.charlestonroadregistry.com, ns-tld2.charlestonroadregistry.com, ns-tld3.charlestonroadregistry.com, ns-tld4.charlestonroadregistry.com...	10 records
htmlvalidator.app	ns2.messagingengine.com, ns1.messagingengine.com	-

✅ Authoritative Response

Server:162.159.25.191

NS records: ns2.messagingengine.com, ns1.messagingengine.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for htmlvalidator.app (unsigned zone)

⏱️ Timing

Total: 338ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`164.90.199.205`
NS	2	`ns1.messagingengine.com, ns2.messagingengine.com`
MX	2	`in1-smtp.messagingengine.com (pri: 10), in2-smtp.messagingengine.com (pri: 20)`
TXT	2	`v=spf1 include:spf.messagingengine.com ?, google-site-verification=jq3l7_jXg2oVd6v`
SOA	1	`ns1.messagingengine.com postmaster.messa`

📌 Glue Records Collected

Total: 10

Out-of-bailiwick: 10 (ns-tld1.charlestonroadregistry.com, ns-tld2.charlestonroadregistry.com, ns-tld3.charlestonroadregistry.com...)

Analysis

IP Addresses

htmlvalidator.app resolves to one IP address: 164.90.199.205.

headlinegenerator.app, cmschecker.app, devext.info and two other host names share IP numbers with htmlvalidator.app.

Name Servers

htmlvalidator.app has two authoritative name servers — ns1.messagingengine.com and ns2.messagingengine.com.

htmlvalidator.app uses the same name servers as several other domains — among them usvm.com, bcllc.org, pb0.name and two more.

The name servers for htmlvalidator.app overlap at least partially with those of other domains — for example capstraw.com.

ns1.messagingengine.com → 162.159.24.178 and ns2.messagingengine.com → 162.159.25.191: one IP number per host name.

Mail Servers

Mail for htmlvalidator.app is handled by two mail servers — in1-smtp.messagingengine.com and in2-smtp.messagingengine.com.

htmlvalidator.app uses an identical mail server configuration to several other domains — among them kitsune.cc, wycc.(0x706f726e), mgbowen.com and two more.

Some mail servers of htmlvalidator.app are also used by other domains, notably shades-hair.com and 2700.ch.

Hostnames that resolve to 8 IP addresses:

in1-smtp.messagingengine.com points to 103.168.172.216, 103.168.172.217, 103.168.172.218 and 5 other IP addresses.

Hosts that point to four IP numbers:

in2-smtp.messagingengine.com resolves to four IP addresses — 202.12.124.216, 202.12.124.217, 202.12.124.218 and 202.12.124.219.