instructit.com - dns.ninja

`instructit.com`

DNSSEC	⚠️ Not signed
A	2606:4700:3036::6815:b10^{🇺🇸 Cloudflare2606:4700:3036::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3037::ac43:938d^{🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.11.16^{Cloudflare104.21.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.147.141^{🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`bella.ns.cloudflare.com` ⭐
		A	2606:4700:50::adf5:3a4a^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`bella.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c04a^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`bella.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:204a^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`bella.ns.cloudflare.com`
		A	108.162.192.74^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`bella.ns.cloudflare.com`
		A	172.64.32.74^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`bella.ns.cloudflare.com`
		A	173.245.58.74^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`bella.ns.cloudflare.com`
NS	`jeff.ns.cloudflare.com`
		A	2606:4700:58::adf5:3b7c^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`jeff.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c17c^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`jeff.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:217c^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`jeff.ns.cloudflare.com`
		A	108.162.193.124^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`jeff.ns.cloudflare.com`
		A	172.64.33.124^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`jeff.ns.cloudflare.com`
		A	173.245.59.124^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`jeff.ns.cloudflare.com`
MX	`aspmx.l.google.com` ⭐
		A	2607:f8b0:4004:c29::1a^{🇺🇸 Google2607:f8b0:4004::/48}
			PTR	`yuiadum-in-f26.1e100.net`
		A	173.194.45.26^{🇺🇸 Google173.194.0.0/16}
			PTR	`yuiadum-in-f26.1e100.net`
MX	`alt1.aspmx.l.google.com`⁽⁵⁾
		A	2800:3f0:4003:c0f::1b^{🇨🇱 Google2800:3f0:4003::/48}
		A	108.177.123.27^{🇺🇸 Google108.177.123.0/24}
			PTR	`lcscld-in-f27.1e100.net`
MX	`alt2.aspmx.l.google.com`⁽⁵⁾
		A	2a00:1450:400b:c02::1a^{🇮🇪 Google2a00:1450:400b::/48}
			PTR	`dj-in-f26.1e100.net`
		A	172.253.116.26^{🇺🇸 Google172.253.116.0/24}
			PTR	`dj-in-f26.1e100.net`
MX	`alt3.aspmx.l.google.com`⁽¹⁰⁾
		A	2a00:1450:4009:c0f::1b^{🇬🇧 Google2a00:1450:4009::/48}
			PTR	`yulhrs-in-f27.1e100.net`
		A	192.178.223.26^{🇺🇸 Google192.178.223.0/24}
			PTR	`yulhrs-in-f26.1e100.net`
MX	`alt4.aspmx.l.google.com`⁽¹⁰⁾
		A	2a00:1450:400c:c23::1a^{🇧🇪 Google2a00:1450:400c::/48}
			PTR	`yubrupd-in-f26.1e100.net`
		A	172.253.157.26^{🇺🇸 Google172.253.0.0/16}
			PTR	`yubrupd-in-f26.1e100.net`
TXT	`google-site-verification=YFqJD7tA-fkBJGBgXpVTp1vZ1_i4JD0Ox3MIsU33Wsk`
TXT	`google-site-verification=xHPNBrC4QzN6x9DvpjYpGquA7Zp0WmT579d_XCR0xVI`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.11.16, 172.67.147.141
		IPv6 hints	2606:4700:3036::6815:b10, 2606:4700:3037::ac43:938d
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=7, name=cloudflare-ech.com
SOA	`bella.ns.cloudflare.com`dns@cloudflare.com serial=2409725373

`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=1785315847

Subdomains

www.instructit.com

Same first word

instructit.com

Similar names

strictunit.com

DNS History

27 records (11 active, 16 former)

●NSbella.ns.cloudflare.com2016-01-27 → 2026-07-29 · 3 obs

○ 2015-11-09 21:08:34
● 2016-01-27 17:02:38
● 2026-07-29 09:07:42

●NSjeff.ns.cloudflare.com2016-01-27 → 2026-07-29 · 3 obs

○ 2015-11-09 21:08:34
● 2016-01-27 17:02:38
● 2026-07-29 09:07:42

○NSns51.domaincontrol.com2015-11-09 → 2015-11-09 · 3 obs

● 2015-11-09 21:08:34
○ 2016-01-27 17:02:38
○ 2026-07-29 09:07:42

○NSns52.domaincontrol.com2015-11-09 → 2015-11-09 · 3 obs

● 2015-11-09 21:08:34
○ 2016-01-27 17:02:38
○ 2026-07-29 09:07:42

●MXalt1.aspmx.l.google.com2026-03-25 → 2026-07-29 · 3 obs

○ 2017-02-17 18:28:22
● 2026-03-25 00:59:38
● 2026-07-29 09:07:42

●MXalt2.aspmx.l.google.com2026-03-25 → 2026-07-29 · 3 obs

○ 2017-02-17 18:28:22
● 2026-03-25 00:59:38
● 2026-07-29 09:07:42

●MXalt3.aspmx.l.google.com2026-03-25 → 2026-07-29 · 3 obs

○ 2017-02-17 18:28:22
● 2026-03-25 00:59:38
● 2026-07-29 09:07:42

●MXalt4.aspmx.l.google.com2026-03-25 → 2026-07-29 · 3 obs

○ 2017-02-17 18:28:22
● 2026-03-25 00:59:38
● 2026-07-29 09:07:42

●MXaspmx.l.google.com2026-03-25 → 2026-07-29 · 3 obs

○ 2017-02-17 18:28:22
● 2026-03-25 00:59:38
● 2026-07-29 09:07:42

○MXmx.zoho.com2015-11-09 → 2017-02-17 · 4 obs

● 2015-11-09 21:08:34
● 2017-02-17 18:28:22
○ 2026-03-25 00:59:38
○ 2026-07-29 09:07:42

○MXmx2.zoho.com2015-11-09 → 2017-02-17 · 4 obs

● 2015-11-09 21:08:34
● 2017-02-17 18:28:22
○ 2026-03-25 00:59:38
○ 2026-07-29 09:07:42

●A104.21.11.162026-03-27 → 2026-07-29 · 3 obs

○ 2026-03-25 00:59:38
● 2026-03-27 05:45:06
● 2026-07-29 09:07:42

○A104.31.70.1352016-01-27 → 2017-02-17 · 5 obs

○ 2015-11-09 21:08:34
● 2016-01-27 17:02:38
● 2017-02-17 18:28:22
○ 2026-03-25 00:59:38
○ 2026-07-29 09:07:42

○A104.31.71.1352016-01-27 → 2017-02-17 · 5 obs

○ 2015-11-09 21:08:34
● 2016-01-27 17:02:38
● 2017-02-17 18:28:22
○ 2026-03-25 00:59:38
○ 2026-07-29 09:07:42

●A172.67.147.1412026-03-27 → 2026-07-29 · 3 obs

○ 2026-03-25 00:59:38
● 2026-03-27 05:45:06
● 2026-07-29 09:07:42

○A184.168.221.412015-11-09 → 2015-11-09 · 4 obs

○ 2015-07-03 05:14:12
● 2015-11-09 21:08:34
○ 2016-01-27 17:02:38
○ 2026-07-29 09:07:42

○A188.114.96.02026-03-25 → 2026-03-25 · 4 obs

○ 2017-02-17 18:28:22
● 2026-03-25 00:59:38
○ 2026-03-27 05:45:06
○ 2026-07-29 09:07:42

○A188.114.97.02026-03-25 → 2026-03-25 · 4 obs

○ 2017-02-17 18:28:22
● 2026-03-25 00:59:38
○ 2026-03-27 05:45:06
○ 2026-07-29 09:07:42

○A2400:cb00:2048:1::681f:46872017-02-17 → 2017-02-17 · 4 obs

○ 2016-01-27 17:02:38
● 2017-02-17 18:28:22
○ 2026-03-25 00:59:38
○ 2026-07-29 09:07:42

○A2400:cb00:2048:1::681f:47872017-02-17 → 2017-02-17 · 4 obs

○ 2016-01-27 17:02:38
● 2017-02-17 18:28:22
○ 2026-03-25 00:59:38
○ 2026-07-29 09:07:42

○A2606:4700:3030::6815:b102026-03-27 → 2026-06-07 · 5 obs

○ 2026-03-25 00:59:38
● 2026-03-27 05:45:06
● 2026-06-07 13:52:28
○ 2026-07-09 16:24:26
○ 2026-07-29 09:07:42

○A2606:4700:3034::ac43:938d2026-03-27 → 2026-06-07 · 5 obs

○ 2026-03-25 00:59:38
● 2026-03-27 05:45:06
● 2026-06-07 13:52:28
○ 2026-07-09 16:24:26
○ 2026-07-29 09:07:42

●A2606:4700:3036::6815:b102026-07-09 → 2026-07-29 · 3 obs

○ 2026-06-07 13:52:28
● 2026-07-09 16:24:26
● 2026-07-29 09:07:42

●A2606:4700:3037::ac43:938d2026-07-09 → 2026-07-29 · 3 obs

○ 2026-06-07 13:52:28
● 2026-07-09 16:24:26
● 2026-07-29 09:07:42

○A2a06:98c1:3120::2026-03-25 → 2026-03-25 · 4 obs

○ 2017-02-17 18:28:22
● 2026-03-25 00:59:38
○ 2026-03-27 05:45:06
○ 2026-07-29 09:07:42

○A2a06:98c1:3121::2026-03-25 → 2026-03-25 · 4 obs

○ 2017-02-17 18:28:22
● 2026-03-25 00:59:38
○ 2026-03-27 05:45:06
○ 2026-07-29 09:07:42

○A66.151.181.492015-07-03 → 2015-07-03 · 3 obs

● 2015-07-03 05:14:12
○ 2015-11-09 21:08:34
○ 2026-07-29 09:07:42

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	l.gtld-servers.net, j.gtld-servers.net, h.gtld-servers.net, d.gtld-servers.net...	-
instructit.com	jeff.ns.cloudflare.com, bella.ns.cloudflare.com	12 records

✅ Authoritative Response

Server:108.162.193.124

NS records: jeff.ns.cloudflare.com, bella.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for instructit.com (unsigned zone)

⏱️ Timing

Total: 1258ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.67.147.141, 104.21.11.16`
AAAA	2	`2606:4700:3037::ac43:938d, 2606:4700:3036::6815:b10`
NS	2	`bella.ns.cloudflare.com, jeff.ns.cloudflare.com`
MX	5	`aspmx.l.google.com (pri: 1), alt3.aspmx.l.google.com (pri: 10)...`
TXT	2	`google-site-verification=YFqJD7tA-fkBJGB, google-site-verification=xHPNBrC4QzN6x9D`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`bella.ns.cloudflare.com dns.cloudflare.c`

📌 Glue Records Collected

Total: 12

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

Analysis

Hierarchy

www.instructit.com is a subdomain of instructit.com.

IP Addresses

instructit.com directs to four IP numbers, which are 104.21.11.16, 172.67.147.141, 2606:4700:3036::6815:b10 and 2606:4700:3037::ac43:938d.

Two other host names, along with mymathlabhelp.com, kszys.net and sdemand.com, also share IP numbers with instructit.com.

Name Servers

The NS records for instructit.com delegate to bella.ns.cloudflare.com and jeff.ns.cloudflare.com.

instructit.com shares its NS records with other domains, for example abstaging.xyz, esquimalt.ca, madhav.io and two others.

The name servers of instructit.com overlap at least partially with those of other domains — among them breitling-watches.us, gdj2a3qy.com, voicemediajp.net and two more.

The name servers dion.ns.cloudflare.com, jose.ns.cloudflare.com and mark.ns.cloudflare.com are commonly seen alongside these name servers.

DNS names with 6 IP addresses:

bella.ns.cloudflare.com maps to 108.162.192.74, 172.64.32.74, 173.245.58.74 and 3 additional IP addresses.

jeff.ns.cloudflare.com maps to 108.162.193.124, 172.64.33.124, 173.245.59.124 and 3 additional IP addresses.

Mail Servers

Five mail servers handle instructit.com: aspmx.l.google.com, alt1.aspmx.l.google.com, alt2.aspmx.l.google.com and two others.

There is at least a partial MX overlap between instructit.com and other domains, including zappworld.com, valere.de, academicos.com.ec and two others.

alt3.aspmx.l.google.com, alt4.aspmx.l.google.com, aspmx2.googlemail.com and aspmx3.googlemail.com are mail servers that frequently appear together with these mail servers.

Host names that have two IP addresses:

The A records for aspmx.l.google.com return 173.194.45.26 and 2607:f8b0:4004:c29::1a.

The A records for alt1.aspmx.l.google.com return 108.177.123.27 and 2800:3f0:4003:c0f::1b.

The A records for alt2.aspmx.l.google.com return 172.253.116.26 and 2a00:1450:400b:c02::1a.

The A records for alt3.aspmx.l.google.com return 192.178.223.26 and 2a00:1450:4009:c0f::1b.

The A records for alt4.aspmx.l.google.com return 172.253.157.26 and 2a00:1450:400c:c23::1a.