🛡️Domain Reputation CheckBlocklist, phishing & malware status→

`stackmail.app`

DNSSEC	⚠️ Not signed
A	2606:4700:3034::6815:4557^{🇺🇸 Cloudflare2606:4700:3034::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
A	2606:4700:3036::ac43:ce89^{🇺🇸 Cloudflare2606:4700:3036::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
A	104.21.69.87^{Cloudflare104.21.64.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
A	172.67.206.137^{🇺🇸 Cloudflare172.67.192.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
NS	`dns1.registrar-servers.com` ⭐
		A	2610:a1:1024::200^{🇺🇸 MAINT-ID-120082610:a1:1024::/48 Neustar}
			PTR	`dns1.namecheaphosting.com`
			PTR	`dns1.registrar-servers.com`
		A	156.154.132.200^{🇺🇸 MAINT-ID-12008156.154.132.0/24 Neustar}
			PTR	`dns1.namecheaphosting.com`
			PTR	`dns1.registrar-servers.com`
NS	`dns2.registrar-servers.com`
		A	2610:a1:1025::200^{🇺🇸 MAINT-ID-120082610:a1:1025::/48 Neustar}
			PTR	`dns2.namecheaphosting.com`
			PTR	`dns2.registrar-servers.com`
		A	156.154.133.200^{🇺🇸 MAINT-ID-12008156.154.133.0/24 Neustar}
			PTR	`dns2.namecheaphosting.com`
			PTR	`dns2.registrar-servers.com`
MX	`eforward1.registrar-servers.com` ⭐
		A	162.255.118.51^{🇺🇸 NAMCHEAP-PH162.255.118.0/24 Namecheap, Inc. 11400 W. Olympic Blvd. Suite 200 Los Angeles, CA 90064 UNITED STATES}
			PTR	`eforward1.registrar-servers.com`
			PTR	`eforward3.registrar-servers.com`
MX	`eforward2.registrar-servers.com` ⭐
		A	162.255.118.52^{🇺🇸 NAMCHEAP-PH162.255.118.0/24 Namecheap, Inc. 11400 W. Olympic Blvd. Suite 200 Los Angeles, CA 90064 UNITED STATES}
			PTR	`eforward2.registrar-servers.com`
MX	`eforward3.registrar-servers.com` ⭐
		A	162.255.118.51^{🇺🇸 NAMCHEAP-PH162.255.118.0/24 Namecheap, Inc. 11400 W. Olympic Blvd. Suite 200 Los Angeles, CA 90064 UNITED STATES}
			PTR	`eforward1.registrar-servers.com`
			PTR	`eforward3.registrar-servers.com`
MX	`eforward4.registrar-servers.com`⁽¹⁵⁾
		A	162.255.118.52^{🇺🇸 NAMCHEAP-PH162.255.118.0/24 Namecheap, Inc. 11400 W. Olympic Blvd. Suite 200 Los Angeles, CA 90064 UNITED STATES}
			PTR	`eforward2.registrar-servers.com`
MX	`eforward5.registrar-servers.com`⁽²⁰⁾
		A	162.255.118.51^{🇺🇸 NAMCHEAP-PH162.255.118.0/24 Namecheap, Inc. 11400 W. Olympic Blvd. Suite 200 Los Angeles, CA 90064 UNITED STATES}
			PTR	`eforward1.registrar-servers.com`
			PTR	`eforward3.registrar-servers.com`
TXT	`v=spf1 include:spf.efwd.registrar-servers.com ~all`
SOA	`dns1.registrar-servers.com`hostmaster@registrar-servers.com serial=1787801124

`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

stackmail.de

stackmail.in

stackmail.sbs

stackmail.com

stackmail.si

stackmail.online

stackmail.site

stackmail.org

stackmail.app

stackmail.co.uk

stackmail.io

Similar names

Previous names

Next names

DNS History

11 records (11 active, 0 former)

●NSdns1.registrar-servers.com2026-09-04 → 2026-09-11 · 2 obs

● 2026-09-04 20:06:38
● 2026-09-11 00:55:38

●NSdns2.registrar-servers.com2026-09-04 → 2026-09-11 · 2 obs

● 2026-09-04 20:06:38
● 2026-09-11 00:55:38

●MXeforward1.registrar-servers.com2026-09-04 → 2026-09-11 · 2 obs

● 2026-09-04 20:06:38
● 2026-09-11 00:55:38

●MXeforward2.registrar-servers.com2026-09-04 → 2026-09-11 · 2 obs

● 2026-09-04 20:06:38
● 2026-09-11 00:55:38

●MXeforward3.registrar-servers.com2026-09-04 → 2026-09-11 · 2 obs

● 2026-09-04 20:06:38
● 2026-09-11 00:55:38

●MXeforward4.registrar-servers.com2026-09-04 → 2026-09-11 · 2 obs

● 2026-09-04 20:06:38
● 2026-09-11 00:55:38

●MXeforward5.registrar-servers.com2026-09-04 → 2026-09-11 · 2 obs

● 2026-09-04 20:06:38
● 2026-09-11 00:55:38

●A104.21.69.872026-09-04 → 2026-09-11 · 2 obs

● 2026-09-04 20:06:38
● 2026-09-11 00:55:38

●A172.67.206.1372026-09-04 → 2026-09-11 · 2 obs

● 2026-09-04 20:06:38
● 2026-09-11 00:55:38

●A2606:4700:3034::6815:45572026-09-04 → 2026-09-11 · 2 obs

● 2026-09-04 20:06:38
● 2026-09-11 00:55:38

●A2606:4700:3036::ac43:ce892026-09-04 → 2026-09-11 · 2 obs

● 2026-09-04 20:06:38
● 2026-09-11 00:55:38

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
app	ns-tld1.charlestonroadregistry.com, ns-tld2.charlestonroadregistry.com, ns-tld3.charlestonroadregistry.com, ns-tld4.charlestonroadregistry.com...	-
stackmail.app	dns2.registrar-servers.com, dns1.registrar-servers.com	-

✅ Authoritative Response

Server:156.154.132.200

NS records: dns2.registrar-servers.com, dns1.registrar-servers.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for stackmail.app (unsigned zone)

⏱️ Timing

Total: 327ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.67.206.137, 104.21.69.87`
AAAA	2	`2606:4700:3034::6815:4557, 2606:4700:3036::ac43:ce89`
NS	2	`dns1.registrar-servers.com, dns2.registrar-servers.com`
MX	5	`eforward1.registrar-servers.com (pri: 10, eforward2.registrar-servers.com (pri: 10...`
TXT	1	`v=spf1 include:spf.efwd.registrar-server`
SOA	1	`dns1.registrar-servers.com hostmaster.re`

Analysis

IP Addresses

stackmail.app has four IP addresses: 104.21.69.87, 172.67.206.137, 2606:4700:3034::6815:4557 and 2606:4700:3036::ac43:ce89.

Additional host names — healthinsightadvisor.com, outgoingkingfisher.autos, student-masteryconnect.com and two others — share IP numbers with stackmail.app.

Name Servers

stackmail.app is delegated to two name servers: dns1.registrar-servers.com and dns2.registrar-servers.com.

stackmail.app shares its name server setup with other domains, including meetboard.org, bcff.club, boccajewelry.com and two others.

stackmail.app shares at least some of its name servers with other domains, such as 2apophenia.com and anvilbird.com.

dns1.registrar-servers.com and dns2.registrar-servers.com each resolve to two IP addresses: dns1.registrar-servers.com points to 156.154.132.200 and 2610:a1:1024::200, while dns2.registrar-servers.com points to 156.154.133.200 and 2610:a1:1025::200.

Mail Servers

Mail for stackmail.app is handled by five mail servers, namely eforward1.registrar-servers.com, eforward2.registrar-servers.com, eforward3.registrar-servers.com and two others.

stackmail.app shares mail servers — at least in part — with other domains, including appliedcosmos.org, lroomstaging.com, exltrading.com and two others.

These mail servers frequently appear alongside the mail servers eforward4.registrar-servers.com and eforward5.registrar-servers.com.

Host names pointing to a single IP address:

eforward1.registrar-servers.com points to 162.255.118.51.

eforward2.registrar-servers.com points to 162.255.118.52.

eforward3.registrar-servers.com points to 162.255.118.51.

eforward4.registrar-servers.com points to 162.255.118.52.

eforward5.registrar-servers.com points to 162.255.118.51.

eforward1.registrar-servers.com, eforward3.registrar-servers.com and eforward5.registrar-servers.com are host names that all point to 162.255.118.51.

eforward2.registrar-servers.com and eforward4.registrar-servers.com are host names that each point to 162.255.118.52 IP addresses.