`knowapp.com`

DNSSEC	⚠️ Not signed
A	2606:4700:3035::6815:1e43^{🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3036::ac43:ac37^{🇺🇸 Cloudflare2606:4700:3036::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.30.67^{Cloudflare104.21.16.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.172.55^{🇺🇸 Cloudflare172.67.160.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`courtney.ns.cloudflare.com` ⭐
		A	2606:4700:50::a29f:2682^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`courtney.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c282^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`courtney.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2282^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`courtney.ns.cloudflare.com`
		A	108.162.194.130^{🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`courtney.ns.cloudflare.com`
		A	162.159.38.130^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`courtney.ns.cloudflare.com`
		A	172.64.34.130^{🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`courtney.ns.cloudflare.com`
NS	`rex.ns.cloudflare.com`
		A	2606:4700:58::a29f:2c0d^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`rex.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c30d^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`rex.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:230d^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`rex.ns.cloudflare.com`
		A	108.162.195.13^{🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`rex.ns.cloudflare.com`
		A	162.159.44.13^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`rex.ns.cloudflare.com`
		A	172.64.35.13^{🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`rex.ns.cloudflare.com`
MX	`alt1.aspmx.l.google.com` ⭐
		A	2607:f8b0:4003:c30::1b^{🇺🇸 Google2607:f8b0:4003::/48}
			PTR	`yutulis-in-f27.1e100.net`
		A	74.125.27.26^{🇺🇸 Google74.125.27.0/24}
			PTR	`yutulis-in-f26.1e100.net`
MX	`alt2.aspmx.l.google.com` ⭐
		A	2607:f8b0:4001:c70::1a^{🇺🇸 Google2607:f8b0:4001::/48}
			PTR	`yucbful-in-f26.1e100.net`
		A	192.178.209.26^{🇺🇸 Google192.178.209.0/24}
			PTR	`yucbful-in-f26.1e100.net`
MX	`alt3.aspmx.l.google.com` ⭐
		A	2607:f8b0:4024:c0d::1b^{🇺🇸 Google2607:f8b0::/32}
			PTR	`mj-in-f27.1e100.net`
		A	192.178.152.26^{🇺🇸 Google192.178.152.0/24}
			PTR	`mj-in-f26.1e100.net`
MX	`alt4.aspmx.l.google.com` ⭐
		A	2607:f8b0:4023:403::1a^{🇺🇸 Google2607:f8b0::/32}
			PTR	`gg-in-f26.1e100.net`
		A	142.250.96.27^{🇺🇸 Google142.250.96.0/24}
			PTR	`gg-in-f27.1e100.net`
MX	`aspmx.l.google.com` ⭐
		A	2607:f8b0:4004:c19::1b^{🇺🇸 Google2607:f8b0:4004::/48}
			PTR	`bk-in-f27.1e100.net`
		A	172.253.62.27^{🇺🇸 Google172.253.62.0/24}
			PTR	`bc-in-f27.1e100.net`
TXT	`google-site-verification=1QEm7q00dgWUWEzSGH3w88pWPDJf8GRRzm8WDey8xX0`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4	104.21.30.67, 172.67.172.55
		IPv6	2606:4700:3035::6815:1e43, 2606:4700:3036::ac43:ac37
SOA	`courtney.ns.cloudflare.com`dns@cloudflare.com serial=2397995286

`com`

	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=1771291435

Subdomains

mail.knowapp.com

Same first word

knowapp.com

knowapp.de

Similar names

appknow.net

DNS History

19 records (11 active, 8 former)

●NScourtney.ns.cloudflare.com2026-02-17 → 2026-03-07 · 3 obs

○ 2017-12-12 11:53:38
● 2026-02-17 18:11:36
● 2026-03-07 09:11:20

○NSns1.mediatemple.net2015-06-05 → 2017-12-12 · 4 obs

● 2015-06-05 16:54:12
● 2017-12-12 11:53:38
○ 2026-02-17 18:11:36
○ 2026-03-07 09:11:20

○NSns2.mediatemple.net2015-06-05 → 2017-12-12 · 4 obs

● 2015-06-05 16:54:12
● 2017-12-12 11:53:38
○ 2026-02-17 18:11:36
○ 2026-03-07 09:11:20

●NSrex.ns.cloudflare.com2026-02-17 → 2026-03-07 · 3 obs

○ 2017-12-12 11:53:38
● 2026-02-17 18:11:36
● 2026-03-07 09:11:20

●MXalt1.aspmx.l.google.com2015-06-05 → 2026-03-07 · 6 obs

● 2015-06-05 16:54:12
● 2016-09-14 08:47:48
○ 2016-12-24 17:19:20
○ 2017-12-12 11:53:38
● 2026-02-17 18:11:36
● 2026-03-07 09:11:20

●MXalt2.aspmx.l.google.com2015-06-05 → 2026-03-07 · 6 obs

● 2015-06-05 16:54:12
● 2016-09-14 08:47:48
○ 2016-12-24 17:19:20
○ 2017-12-12 11:53:38
● 2026-02-17 18:11:36
● 2026-03-07 09:11:20

●MXalt3.aspmx.l.google.com2026-02-17 → 2026-03-07 · 3 obs

○ 2017-12-12 11:53:38
● 2026-02-17 18:11:36
● 2026-03-07 09:11:20

●MXalt4.aspmx.l.google.com2026-02-17 → 2026-03-07 · 3 obs

○ 2017-12-12 11:53:38
● 2026-02-17 18:11:36
● 2026-03-07 09:11:20

●MXaspmx.l.google.com2015-06-05 → 2026-03-07 · 6 obs

● 2015-06-05 16:54:12
● 2016-09-14 08:47:48
○ 2016-12-24 17:19:20
○ 2017-12-12 11:53:38
● 2026-02-17 18:11:36
● 2026-03-07 09:11:20

○MXaspmx2.googlemail.com2015-06-05 → 2016-09-14 · 4 obs

● 2015-06-05 16:54:12
● 2016-09-14 08:47:48
○ 2016-12-24 17:19:20
○ 2026-03-07 09:11:20

○MXaspmx3.googlemail.com2015-06-05 → 2016-09-14 · 4 obs

● 2015-06-05 16:54:12
● 2016-09-14 08:47:48
○ 2016-12-24 17:19:20
○ 2026-03-07 09:11:20

○MXaspmx4.googlemail.com2015-06-05 → 2016-09-14 · 4 obs

● 2015-06-05 16:54:12
● 2016-09-14 08:47:48
○ 2016-12-24 17:19:20
○ 2026-03-07 09:11:20

○MXaspmx5.googlemail.com2015-06-05 → 2016-09-14 · 4 obs

● 2015-06-05 16:54:12
● 2016-09-14 08:47:48
○ 2016-12-24 17:19:20
○ 2026-03-07 09:11:20

○MXmail.knowapp.com2016-12-24 → 2017-12-12 · 5 obs

○ 2016-09-14 08:47:48
● 2016-12-24 17:19:20
● 2017-12-12 11:53:38
○ 2026-02-17 18:11:36
○ 2026-03-07 09:11:20

●A104.21.30.672026-02-17 → 2026-03-07 · 3 obs

○ 2017-12-12 11:53:38
● 2026-02-17 18:11:36
● 2026-03-07 09:11:20

●A172.67.172.552026-02-17 → 2026-03-07 · 3 obs

○ 2017-12-12 11:53:38
● 2026-02-17 18:11:36
● 2026-03-07 09:11:20

●A2606:4700:3035::6815:1e432026-02-17 → 2026-03-07 · 3 obs

○ 2017-12-12 11:53:38
● 2026-02-17 18:11:36
● 2026-03-07 09:11:20

●A2606:4700:3036::ac43:ac372026-02-17 → 2026-03-07 · 3 obs

○ 2017-12-12 11:53:38
● 2026-02-17 18:11:36
● 2026-03-07 09:11:20

○A72.47.224.1422015-06-05 → 2017-12-12 · 4 obs

● 2015-06-05 16:54:12
● 2017-12-12 11:53:38
○ 2026-02-17 18:11:36
○ 2026-03-07 09:11:20

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
knowapp.com	courtney.ns.cloudflare.com, rex.ns.cloudflare.com	12 records

✅ Authoritative Response

Server: 108.162.195.13

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for knowapp.com (unsigned zone)

⏱️ Timing

Total: 225ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.21.30.67, 172.67.172.55`
AAAA	2	`2606:4700:3035::6815:1e43, 2606:4700:3036::ac43:ac37`
NS	2	`courtney.ns.cloudflare.com, rex.ns.cloudflare.com`
MX	5	`ALT1.ASPMX.L.GOOGLE.com (pri: 0), ALT2.ASPMX.L.GOOGLE.com (pri: 0)...`
TXT	1	`google-site-verification=1QEm7q00dgWUWEz`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`courtney.ns.cloudflare.com dns.cloudflar`

📌 Glue Records Collected

Total: 12

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

Analysis

Hierarchy

mail.knowapp.com has knowapp.com as its parent.

IP Addresses

knowapp.com maps to four IP numbers: 2606:4700:3035::6815:1e43, 2606:4700:3036::ac43:ac37, 104.21.30.67 and 172.67.172.55.

Other host names, for instance xhuaw.com.cn, www.fsfbcitas.co, www.001921.com, 98955u.com and agency.vc share IP numbers with knowapp.com.

Name Servers

Two name servers courtney.ns.cloudflare.com and rex.ns.cloudflare.com are delegated to knowapp.com.

knowapp.com uses the same name server configuration as other domains, such as smarshblast.com, mabar.id, globalcreditpartnersarchive.com, garlinghouse.pro and webrevisions.com.

knowapp.com at least partially shares name servers with other domains such as yourminoru.ca, furrydogmother.co.uk, iserestaurantnyc.com, bigsoko.com and elbalondon.com.

these name servers are commonly used alongside the name servers heather.ns.cloudflare.com, chloe.ns.cloudflare.com, ligia.ns.cloudflare.com, rosalyn.ns.cloudflare.com and fish.ns.cloudflare.com.

Host names with six IP numbers: Host name courtney.ns.cloudflare.com points to 2606:4700:50::a29f:2682, 2803:f800:50::6ca2:c282, 2a06:98c1:50::ac40:2282, 108.162.194.130, 162.159.38.130 and 172.64.34.130; host name rex.ns.cloudflare.com points to 2606:4700:58::a29f:2c0d, 2803:f800:50::6ca2:c30d, 2a06:98c1:50::ac40:230d, 108.162.195.13, 162.159.44.13 and 172.64.35.13.

Mail Servers

knowapp.com is handled by five mail servers: aspmx.l.google.com, alt1.aspmx.l.google.com, alt2.aspmx.l.google.com, alt3.aspmx.l.google.com and alt4.aspmx.l.google.com.

knowapp.com shares mail servers with other domains at least in part, for instance ns500671.ns500671.ns500671.ns500704.ns500704.ns500704.ns500688.ns500649.ns500671.ns500153.tenderladiesbz.com, ns500698.ns500759.ns500759.ns500758.ns500698.ns500698.ns500698.ns500735.ns500736.ns500698.ns500698.ns500708.ns500708.ns500619.ns500619.ns500652.ns500619.trackreceptor.com, ns500698.ns500758.ns500759.ns500698.ns500759.ns500698.ns500736.ns500698.ns500736.ns500698.ns500708.ns500708.ns500698.ns500708.ns500708.ns500652.trackreceptor.com, ns500742.ns500742.ns500754.ns500742.ns500742.ns500671.ns500754.ns500704.ns500678.ns500671.ns500649.ns500291.ns500291.ns500291.ns500131.lustychickser.com and acadiainitiative.com.

These mail servers are often used together with aspmx2.googlemail.com, aspmx3.googlemail.com, aspmx4.googlemail.com and aspmx5.googlemail.com.

Two IPs per host name:

aspmx.l.google.com points to: 2607:f8b0:4004:c19::1b and 172.253.62.27

alt1.aspmx.l.google.com points to: 2607:f8b0:4003:c30::1b and 74.125.27.26

alt2.aspmx.l.google.com points to: 2607:f8b0:4001:c70::1a and 192.178.209.26

alt3.aspmx.l.google.com points to: 2607:f8b0:4024:c0d::1b and 192.178.152.26

alt4.aspmx.l.google.com points to: 2607:f8b0:4023:403::1a and 142.250.96.27

Pattern: left IDs ascend by 9 (12, 21, 30, 39, 48); each pair of targets ascend by 9 (15/18, 24/27, 33/36, 42/45, 51/54)

knowapp.com - robtex.com

knowapp.com

com

Subdomains

Same first word

Similar names

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

📌 Glue Records Collected

Analysis

Hierarchy

IP Addresses

Name Servers

Mail Servers

`knowapp.com`

`com`