`postmarkapp.net`

DNSSEC	⚠️ Not signed
A	2606:4700:3032::6815:1504^{🇺🇸 Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3032::ac43:c344^{🇺🇸 Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.21.4^{Cloudflare104.21.16.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.195.68^{🇺🇸 Cloudflare172.67.192.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`peaches.ns.cloudflare.com` ⭐
		A	2606:4700:50::a29f:26ef^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`peaches.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c2ef^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`peaches.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:22ef^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`peaches.ns.cloudflare.com`
		A	108.162.194.239^{🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`peaches.ns.cloudflare.com`
		A	162.159.38.239^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`peaches.ns.cloudflare.com`
		A	172.64.34.239^{🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`peaches.ns.cloudflare.com`
NS	`yichun.ns.cloudflare.com`
		A	2606:4700:58::adf5:3bf8^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`yichun.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c1f8^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`yichun.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:21f8^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`yichun.ns.cloudflare.com`
		A	108.162.193.248^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`yichun.ns.cloudflare.com`
		A	172.64.33.248^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`yichun.ns.cloudflare.com`
		A	173.245.59.248^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`yichun.ns.cloudflare.com`
MX	`route1.mx.cloudflare.net` ⭐
		A	2606:4700:f5::b^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route1.mx.cloudflare.net`
		A	2606:4700:f5::c^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route1.mx.cloudflare.net`
		A	2606:4700:f5::d^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route1.mx.cloudflare.net`
		A	162.159.205.11^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route1.mx.cloudflare.net`
		A	162.159.205.12^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route1.mx.cloudflare.net`
		A	162.159.205.13^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route1.mx.cloudflare.net`
MX	`route3.mx.cloudflare.net`⁽⁶⁷⁾
		A	2606:4700:f5::11^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route3.mx.cloudflare.net`
		A	2606:4700:f5::12^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route3.mx.cloudflare.net`
		A	2606:4700:f5::13^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route3.mx.cloudflare.net`
		A	162.159.205.23^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route3.mx.cloudflare.net`
		A	162.159.205.24^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route3.mx.cloudflare.net`
		A	162.159.205.25^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route3.mx.cloudflare.net`
MX	`route2.mx.cloudflare.net`⁽⁹¹⁾
		A	2606:4700:f5::e^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route2.mx.cloudflare.net`
		A	2606:4700:f5::f^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route2.mx.cloudflare.net`
		A	2606:4700:f5::10^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route2.mx.cloudflare.net`
		A	162.159.205.17^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route2.mx.cloudflare.net`
		A	162.159.205.18^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route2.mx.cloudflare.net`
		A	162.159.205.19^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route2.mx.cloudflare.net`
TXT	`v=spf1 include:_spf.mx.cloudflare.net ~all`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.21.4, 172.67.195.68
		IPv6 hints	2606:4700:3032::6815:1504, 2606:4700:3032::ac43:c344
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=206, name=cloudflare-ech.com
SOA	`peaches.ns.cloudflare.com`dns@cloudflare.com serial=2402942978

`net`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.gtld-servers.net` ⭐
	NS	`b.gtld-servers.net`
	NS	`c.gtld-servers.net`
	NS	`d.gtld-servers.net`
	NS	`e.gtld-servers.net`
	NS	`f.gtld-servers.net`
	NS	`g.gtld-servers.net`
	NS	`h.gtld-servers.net`
	NS	`i.gtld-servers.net`
	NS	`j.gtld-servers.net`
	NS	`k.gtld-servers.net`
	NS	`l.gtld-servers.net`
	NS	`m.gtld-servers.net`
	SOA	`a.gtld-servers.net`nstld@verisign-grs.com serial=1778370061

⚠️ On DNS blocklist: tif

Subdomains

www.postmarkapp.net

Same first word

postmarkapp.com

postmarkapp.net

DNS History

9 records (9 active, 0 former)

●NSpeaches.ns.cloudflare.com2026-04-26 → 2026-05-09 · 2 obs

● 2026-04-26 04:04:44
● 2026-05-09 23:42:00

●NSyichun.ns.cloudflare.com2026-04-26 → 2026-05-09 · 2 obs

● 2026-04-26 04:04:44
● 2026-05-09 23:42:00

●MXroute1.mx.cloudflare.net2026-04-26 → 2026-05-09 · 2 obs

● 2026-04-26 04:04:44
● 2026-05-09 23:42:00

●MXroute2.mx.cloudflare.net2026-04-26 → 2026-05-09 · 2 obs

● 2026-04-26 04:04:44
● 2026-05-09 23:42:00

●MXroute3.mx.cloudflare.net2026-04-26 → 2026-05-09 · 2 obs

● 2026-04-26 04:04:44
● 2026-05-09 23:42:00

●A104.21.21.42026-04-26 → 2026-05-09 · 2 obs

● 2026-04-26 04:04:44
● 2026-05-09 23:42:00

●A172.67.195.682026-04-26 → 2026-05-09 · 2 obs

● 2026-04-26 04:04:44
● 2026-05-09 23:42:00

●A2606:4700:3032::6815:15042026-04-26 → 2026-05-09 · 2 obs

● 2026-04-26 04:04:44
● 2026-05-09 23:42:00

●A2606:4700:3032::ac43:c3442026-04-26 → 2026-05-09 · 2 obs

● 2026-04-26 04:04:44
● 2026-05-09 23:42:00

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
net	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
postmarkapp.net	yichun.ns.cloudflare.com, peaches.ns.cloudflare.com	-

✅ Authoritative Response

Server:172.64.34.239

NS records: yichun.ns.cloudflare.com, peaches.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for postmarkapp.net (unsigned zone)

⏱️ Timing

Total: 512ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.67.195.68, 104.21.21.4`
AAAA	2	`2606:4700:3032::6815:1504, 2606:4700:3032::ac43:c344`
NS	2	`peaches.ns.cloudflare.com, yichun.ns.cloudflare.com`
MX	3	`route1.mx.cloudflare.net (pri: 66), route3.mx.cloudflare.net (pri: 67)...`
TXT	1	`v=spf1 include:_spf.mx.cloudflare.net ~a`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`peaches.ns.cloudflare.com dns.cloudflare`

Analysis

Hierarchy

The parent of www.postmarkapp.net is postmarkapp.net.

IP Addresses

postmarkapp.net maps to four IP numbers: 2606:4700:3032::6815:1504, 2606:4700:3032::ac43:c344, 104.21.21.4 and 172.67.195.68.

other host names include svgdogs.com, www.verificacion-vehicular.com.mx.cdn.cloudflare.net, www.phim(0x736578)vietb.com, shuttleroma.com and lyw365con.com; they share IP numbers with postmarkapp.net.

Name Servers

Two name servers peaches.ns.cloudflare.com and yichun.ns.cloudflare.com handle the delegation for postmarkapp.net.

postmarkapp.net uses the same name server setup as other domains, such as britainsheritage.co.uk, counterexamples.info, tutamail.zip and leicesterfireplacecentre.co.uk.

postmarkapp.net at least partially shares name servers with other domains, for instance rigel1.com, claimer.site, drill-battery.com.au, szjiacan.com and cunimar.com.

These name servers are commonly used with jaime.ns.cloudflare.com and lee.ns.cloudflare.com.

Six IP addresses per host:

peaches.ns.cloudflare.com points to 2606:4700:50::a29f:26ef, 2803:f800:50::6ca2:c2ef, 2a06:98c1:50::ac40:22ef, 108.162.194.239, 162.159.38.239 and 172.64.34.239; yichun.ns.cloudflare.com points to 2606:4700:58::adf5:3bf8, 2803:f800:50::6ca2:c1f8, 2a06:98c1:50::ac40:21f8, 108.162.193.248, 172.64.33.248 and 173.245.59.248

Mail Servers

Three mail servers handle postmarkapp.net: route1.mx.cloudflare.net, route2.mx.cloudflare.net and route3.mx.cloudflare.net.

postmarkapp.net shares at least partially some mail servers with other domains, for instance zonatic.mx, chore.ninja, mzansifun.com, carnegiebrass.com and prokids-vs.de.

Host names with six IP numbers:

- route1.mx.cloudflare.net points to 2606:4700:f5::b, 2606:4700:f5::c, 2606:4700:f5::d, 162.159.205.11, 162.159.205.12 and 162.159.205.13

- route2.mx.cloudflare.net points to 2606:4700:f5::e, 2606:4700:f5::f, 2606:4700:f5::10, 162.159.205.17, 162.159.205.18 and 162.159.205.19

- route3.mx.cloudflare.net points to 2606:4700:f5::11, 2606:4700:f5::12, 2606:4700:f5::13, 162.159.205.23, 162.159.205.24 and 162.159.205.25

postmarkapp.net - robtex.com

postmarkapp.net

net

Subdomains

Same first word

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

Analysis

Hierarchy

IP Addresses

Name Servers

Mail Servers

`postmarkapp.net`

`net`