physicsclassroom.com - dns.ninja

`physicsclassroom.com`

DNSSEC	⚠️ Not signed
A	20.118.40.14^{🇺🇸 Microsoft20.64.0.0/10}
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`
NS	`olga.ns.cloudflare.com`
		A	2606:4700:50::adf5:3a89^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`olga.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c089^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`olga.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2089^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`olga.ns.cloudflare.com`
		A	108.162.192.137^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`olga.ns.cloudflare.com`
		A	172.64.32.137^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`olga.ns.cloudflare.com`
		A	173.245.58.137^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`olga.ns.cloudflare.com`
MX	`physicsclassroom-com.mail.protection.outlook.com` ⭐
		A	2a01:111:f403:c91d::a^{🇺🇸 Microsoft2a01:111:f000::/36}
			PTR	`mail-co1pr21cu00202.inbound.protection.outlook.com`
		A	2a01:111:f403:c91d::b^{🇺🇸 Microsoft2a01:111:f000::/36}
			PTR	`mail-mw2pr02cu00603.inbound.protection.outlook.com`
		A	2a01:111:f403:f802::^{🇺🇸 Microsoft2a01:111:f000::/36}
			PTR	`mail-byapr05cu00400.inbound.protection.outlook.com`
		A	2a01:111:f403:f802::3^{🇺🇸 Microsoft2a01:111:f000::/36}
			PTR	`mail-sj0pr03cu01403.inbound.protection.outlook.com`
		A	40.93.192.4^{🇺🇸 Microsoft40.80.0.0/12}
			PTR	`mail-dm2pr04cu00404.inbound.protection.outlook.com`
		A	52.101.9.26^{🇺🇸 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-bl0pr02cu00702.inbound.protection.outlook.com`
		A	52.101.50.10^{🇺🇸 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-mw2pr02cu00502.inbound.protection.outlook.com`
		A	52.101.194.15^{🇺🇸 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-ch4pr21cu00107.inbound.protection.outlook.com`
TXT	`MS=ms91431257`
TXT	`google-site-verification=NxaZ6pdbBnQKCXSDvVDPx0IamJpwODRxbfSyWBxQ5mM`
TXT	`v=spf1 +ip4:64.25.118.17 +ip4:64.25.122.120 +ip4:64.25.120.16 +a +mx include:...`
SOA	`jeff.ns.cloudflare.com`dns@cloudflare.com serial=2406434897

`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=1781446290

rank #22389 globally
rank #11045 in the tld
WOT: SAFE (94/100)
📈 Tranco rank: #54,197

Subdomains

www.physicsclassroom.com

Same first word

physicsclassroom.com

Similar names

physcisclassroom.com

DNS History

18 records (4 active, 14 former)

●NSjeff.ns.cloudflare.com2015-09-01 → 2026-06-14 · 2 obs

● 2015-09-01 09:17:50
● 2026-06-14 14:19:10

●NSolga.ns.cloudflare.com2015-09-01 → 2026-06-14 · 2 obs

● 2015-09-01 09:17:50
● 2026-06-14 14:19:10

○MXmilquetoast.aapt.org2015-09-01 → 2017-02-12 · 4 obs

● 2015-09-01 09:17:50
● 2017-02-12 04:18:44
○ 2026-03-24 07:24:18
○ 2026-06-14 14:19:10

○MXneptune.compadre.org2015-09-01 → 2017-02-12 · 4 obs

● 2015-09-01 09:17:50
● 2017-02-12 04:18:44
○ 2026-03-24 07:24:18
○ 2026-06-14 14:19:10

●MXphysicsclassroom-com.mail.protection.outlook.com2026-03-24 → 2026-06-14 · 3 obs

○ 2017-02-12 04:18:44
● 2026-03-24 07:24:18
● 2026-06-14 14:19:10

○A104.25.183.1062017-02-05 → 2017-02-12 · 5 obs

○ 2016-08-19 16:29:18
● 2017-02-05 09:40:34
● 2017-02-12 04:18:44
○ 2026-03-24 07:24:18
○ 2026-06-14 14:19:10

○A104.25.184.1062017-02-05 → 2017-02-12 · 5 obs

○ 2016-08-19 16:29:18
● 2017-02-05 09:40:34
● 2017-02-12 04:18:44
○ 2026-03-24 07:24:18
○ 2026-06-14 14:19:10

○A104.25.188.122015-10-26 → 2016-08-19 · 5 obs

○ 2015-10-05 00:36:32
● 2015-10-26 20:07:08
● 2016-08-19 16:29:18
○ 2017-02-05 09:40:34
○ 2026-06-14 14:19:10

○A104.25.189.122015-10-26 → 2016-08-19 · 5 obs

○ 2015-10-05 00:36:32
● 2015-10-26 20:07:08
● 2016-08-19 16:29:18
○ 2017-02-05 09:40:34
○ 2026-06-14 14:19:10

○A162.159.241.2432015-09-01 → 2015-10-05 · 4 obs

● 2015-09-01 09:17:50
● 2015-10-05 00:36:32
○ 2015-10-26 20:07:08
○ 2026-06-14 14:19:10

○A162.159.242.2432015-09-01 → 2015-10-05 · 4 obs

● 2015-09-01 09:17:50
● 2015-10-05 00:36:32
○ 2015-10-26 20:07:08
○ 2026-06-14 14:19:10

●A20.118.40.142026-03-24 → 2026-06-14 · 3 obs

○ 2017-02-12 04:18:44
● 2026-03-24 07:24:18
● 2026-06-14 14:19:10

○A2400:cb00:2048:1::6819:b76a2017-02-05 → 2017-02-12 · 5 obs

○ 2016-08-19 16:29:18
● 2017-02-05 09:40:34
● 2017-02-12 04:18:44
○ 2026-03-24 07:24:18
○ 2026-06-14 14:19:10

○A2400:cb00:2048:1::6819:b86a2017-02-05 → 2017-02-12 · 5 obs

○ 2016-08-19 16:29:18
● 2017-02-05 09:40:34
● 2017-02-12 04:18:44
○ 2026-03-24 07:24:18
○ 2026-06-14 14:19:10

○A2400:cb00:2048:1::6819:bc0c2015-10-26 → 2016-08-19 · 5 obs

○ 2015-10-05 00:36:32
● 2015-10-26 20:07:08
● 2016-08-19 16:29:18
○ 2017-02-05 09:40:34
○ 2026-06-14 14:19:10

○A2400:cb00:2048:1::6819:bd0c2015-10-26 → 2016-08-19 · 5 obs

○ 2015-10-05 00:36:32
● 2015-10-26 20:07:08
● 2016-08-19 16:29:18
○ 2017-02-05 09:40:34
○ 2026-06-14 14:19:10

○A2400:cb00:2048:1::a29f:f1f32015-09-01 → 2015-10-05 · 4 obs

● 2015-09-01 09:17:50
● 2015-10-05 00:36:32
○ 2015-10-26 20:07:08
○ 2026-06-14 14:19:10

○A2400:cb00:2048:1::a29f:f2f32015-09-01 → 2015-10-05 · 4 obs

● 2015-09-01 09:17:50
● 2015-10-05 00:36:32
○ 2015-10-26 20:07:08
○ 2026-06-14 14:19:10

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	g.gtld-servers.net, a.gtld-servers.net, j.gtld-servers.net, e.gtld-servers.net...	-
physicsclassroom.com	jeff.ns.cloudflare.com, olga.ns.cloudflare.com	12 records

✅ Authoritative Response

Server:108.162.193.124

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for physicsclassroom.com (unsigned zone)

⏱️ Timing

Total: 156ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`20.118.40.14`
NS	2	`jeff.ns.cloudflare.com, olga.ns.cloudflare.com`
MX	1	`physicsclassroom-com.mail.protection.out`
TXT	3	`MS=ms91431257, google-site-verification=NxaZ6pdbBnQKCXS...`
SOA	1	`jeff.ns.cloudflare.com dns.cloudflare.co`

📌 Glue Records Collected

Total: 12

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

Analysis

Hierarchy

www.physicsclassroom.com is delegated beneath physicsclassroom.com.

IP Addresses

physicsclassroom.com resolves to one IP address: 20.118.40.14.

timec.com, o2aicorp.com, comminus.eu and two other host names share IP numbers with physicsclassroom.com.

Name Servers

physicsclassroom.com is delegated to two name servers: jeff.ns.cloudflare.com and olga.ns.cloudflare.com.

physicsclassroom.com uses the same name servers as several other domains — among them canadadayfireworks.com, germs.io, cardei.studio and two more.

There is at least partial name server overlap between physicsclassroom.com and other domains — secgreenit.com, bashap.com.tr, andrelabs.com and two more among them.

These name servers are routinely deployed together with the name servers tricia.ns.cloudflare.com.

Hostnames that resolve to 6 IP addresses:

jeff.ns.cloudflare.com resolves to 108.162.193.124, 172.64.33.124, 173.245.59.124 and 3 other IP addresses.

olga.ns.cloudflare.com resolves to 108.162.192.137, 172.64.32.137, 173.245.58.137 and 3 other IP addresses.

Mail Servers

Mail for physicsclassroom.com is handled by a single mail server, physicsclassroom-com.mail.protection.outlook.com.

physicsclassroom-com.mail.protection.outlook.com resolves to 8 IP addresses — 40.93.192.4, 52.101.9.26, 52.101.50.10 and 5 others.