`professorblue.com`

DNSSEC	⚠️ Not signed
A	2606:4700:3035::6815:2686^{🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3036::ac43:def5^{🇺🇸 Cloudflare2606:4700:3036::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.38.134^{Cloudflare104.21.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.222.245^{🇺🇸 Cloudflare172.67.208.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`ivy.ns.cloudflare.com` ⭐
		A	2606:4700:50::adf5:3a78^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ivy.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c078^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`ivy.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2078^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`ivy.ns.cloudflare.com`
		A	108.162.192.120^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ivy.ns.cloudflare.com`
		A	172.64.32.120^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ivy.ns.cloudflare.com`
		A	173.245.58.120^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ivy.ns.cloudflare.com`
NS	`todd.ns.cloudflare.com`
		A	2606:4700:58::adf5:3b92^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`todd.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c192^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`todd.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2192^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`todd.ns.cloudflare.com`
		A	108.162.193.146^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`todd.ns.cloudflare.com`
		A	172.64.33.146^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`todd.ns.cloudflare.com`
		A	173.245.59.146^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`todd.ns.cloudflare.com`
MX	`mx1.privateemail.com` ⭐
		A	162.255.118.7^{🇺🇸 NAMCHEAP-PH162.255.118.0/24 Namecheap, Inc. 11400 W. Olympic Blvd. Suite 200 Los Angeles, CA 90064 UNITED STATES}
			PTR	`mx1.privateemail.com`
MX	`mx2.privateemail.com` ⭐
		A	162.255.118.8^{🇺🇸 NAMCHEAP-PH162.255.118.0/24 Namecheap, Inc. 11400 W. Olympic Blvd. Suite 200 Los Angeles, CA 90064 UNITED STATES}
			PTR	`mx2.privateemail.com`
TXT	`brevo-code:6090b52ab902fb6cf84a162b23925ebd`
TXT	`v=spf1 include:spf.privateemail.com ~all`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.38.134, 172.67.222.245
		IPv6 hints	2606:4700:3035::6815:2686, 2606:4700:3036::ac43:def5
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=135, name=cloudflare-ech.com
SOA	`ivy.ns.cloudflare.com`dns@cloudflare.com serial=2403757859

`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=1778727196

Subdomains

www.professorblue.com

DNS History

27 records (8 active, 19 former)

○NScody.ns.cloudflare.com2015-07-06 → 2017-03-21 · 4 obs

● 2015-07-06 20:41:34
● 2017-03-21 08:36:58
○ 2020-02-06 16:31:46
○ 2026-05-14 03:01:30

●NSivy.ns.cloudflare.com2026-05-14 → 2026-05-14 · 2 obs

○ 2020-02-06 16:31:46
● 2026-05-14 03:01:30

○NSns1.m43.siteground.biz2020-02-06 → 2020-02-06 · 3 obs

○ 2017-03-21 08:36:58
● 2020-02-06 16:31:46
○ 2026-05-14 03:01:30

○NSns2.m43.siteground.biz2020-02-06 → 2020-02-06 · 3 obs

○ 2017-03-21 08:36:58
● 2020-02-06 16:31:46
○ 2026-05-14 03:01:30

○NSsue.ns.cloudflare.com2015-07-06 → 2017-03-21 · 4 obs

● 2015-07-06 20:41:34
● 2017-03-21 08:36:58
○ 2020-02-06 16:31:46
○ 2026-05-14 03:01:30

●NStodd.ns.cloudflare.com2026-05-14 → 2026-05-14 · 2 obs

○ 2020-02-06 16:31:46
● 2026-05-14 03:01:30

○MXmailstore1.secureserver.net2015-07-06 → 2017-03-21 · 4 obs

● 2015-07-06 20:41:34
● 2017-03-21 08:36:58
○ 2020-02-06 16:31:46
○ 2026-05-14 03:01:30

○MXmx.zoho.com2017-03-21 → 2017-03-21 · 4 obs

○ 2015-07-06 20:41:34
● 2017-03-21 08:36:58
○ 2020-02-06 16:31:46
○ 2026-05-14 03:01:30

●MXmx1.privateemail.com2026-05-14 → 2026-05-14 · 2 obs

○ 2020-02-06 16:31:46
● 2026-05-14 03:01:30

○MXmx10.mailspamprotection.com2020-02-06 → 2020-02-06 · 3 obs

○ 2017-03-21 08:36:58
● 2020-02-06 16:31:46
○ 2026-05-14 03:01:30

●MXmx2.privateemail.com2026-05-14 → 2026-05-14 · 2 obs

○ 2020-02-06 16:31:46
● 2026-05-14 03:01:30

○MXmx20.mailspamprotection.com2020-02-06 → 2020-02-06 · 3 obs

○ 2017-03-21 08:36:58
● 2020-02-06 16:31:46
○ 2026-05-14 03:01:30

○MXmx30.mailspamprotection.com2020-02-06 → 2020-02-06 · 3 obs

○ 2017-03-21 08:36:58
● 2020-02-06 16:31:46
○ 2026-05-14 03:01:30

○MXsmtp.secureserver.net2015-07-06 → 2017-03-21 · 4 obs

● 2015-07-06 20:41:34
● 2017-03-21 08:36:58
○ 2020-02-06 16:31:46
○ 2026-05-14 03:01:30

●A104.21.38.1342026-05-14 → 2026-05-14 · 2 obs

○ 2020-02-06 16:31:46
● 2026-05-14 03:01:30

○A104.27.154.1322017-03-21 → 2017-03-21 · 4 obs

○ 2016-04-29 10:20:08
● 2017-03-21 08:36:58
○ 2020-02-06 16:31:46
○ 2026-05-14 03:01:30

○A104.27.155.1322017-03-21 → 2017-03-21 · 4 obs

○ 2016-04-29 10:20:08
● 2017-03-21 08:36:58
○ 2020-02-06 16:31:46
○ 2026-05-14 03:01:30

○A104.28.0.792015-07-06 → 2016-04-29 · 4 obs

● 2015-07-06 20:41:34
● 2016-04-29 10:20:08
○ 2017-03-21 08:36:58
○ 2026-05-14 03:01:30

○A104.28.1.792015-07-06 → 2016-04-29 · 4 obs

● 2015-07-06 20:41:34
● 2016-04-29 10:20:08
○ 2017-03-21 08:36:58
○ 2026-05-14 03:01:30

●A172.67.222.2452026-05-14 → 2026-05-14 · 2 obs

○ 2020-02-06 16:31:46
● 2026-05-14 03:01:30

○A2400:cb00:2048:1::681b:9a842017-03-21 → 2017-03-21 · 4 obs

○ 2016-04-29 10:20:08
● 2017-03-21 08:36:58
○ 2020-02-06 16:31:46
○ 2026-05-14 03:01:30

○A2400:cb00:2048:1::681b:9b842017-03-21 → 2017-03-21 · 4 obs

○ 2016-04-29 10:20:08
● 2017-03-21 08:36:58
○ 2020-02-06 16:31:46
○ 2026-05-14 03:01:30

○A2400:cb00:2048:1::681c:14f2015-07-06 → 2016-04-29 · 4 obs

● 2015-07-06 20:41:34
● 2016-04-29 10:20:08
○ 2017-03-21 08:36:58
○ 2026-05-14 03:01:30

○A2400:cb00:2048:1::681c:4f2015-07-06 → 2016-04-29 · 4 obs

● 2015-07-06 20:41:34
● 2016-04-29 10:20:08
○ 2017-03-21 08:36:58
○ 2026-05-14 03:01:30

●A2606:4700:3035::6815:26862026-05-14 → 2026-05-14 · 2 obs

○ 2020-02-06 16:31:46
● 2026-05-14 03:01:30

●A2606:4700:3036::ac43:def52026-05-14 → 2026-05-14 · 2 obs

○ 2020-02-06 16:31:46
● 2026-05-14 03:01:30

○A35.209.136.2042020-02-06 → 2020-02-06 · 3 obs

○ 2017-03-21 08:36:58
● 2020-02-06 16:31:46
○ 2026-05-14 03:01:30

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
professorblue.com	todd.ns.cloudflare.com, ivy.ns.cloudflare.com	12 records

✅ Authoritative Response

Server:108.162.193.146

NS records: todd.ns.cloudflare.com, ivy.ns.cloudflare.com

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 100ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.67.222.245, 104.21.38.134`
AAAA	2	`2606:4700:3036::ac43:def5, 2606:4700:3035::6815:2686`
NS	2	`ivy.ns.cloudflare.com, todd.ns.cloudflare.com`
MX	2	`mx1.privateemail.com (pri: 10), mx2.privateemail.com (pri: 10)`
TXT	2	`brevo-code:6090b52ab902fb6cf84a162b23925, v=spf1 include:spf.privateemail.com ~all`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`ivy.ns.cloudflare.com dns.cloudflare.com`

📌 Glue Records Collected

Total: 12

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

Analysis

Hierarchy

The parent of www.professorblue.com is professorblue.com.

IP Addresses

professorblue.com resolves to four IP numbers: 2606:4700:3035::6815:2686, 2606:4700:3036::ac43:def5, 104.21.38.134 and 172.67.222.245.

Other host names such as s_1.kino-ok3.store, sunlan.me, www.xcwmoon.com, dewittsmedia.com and namaenonaionnatachi-movie.net share IPs with professorblue.com.

Name Servers

professorblue.com is delegated to two name servers: ivy.ns.cloudflare.com and todd.ns.cloudflare.com.

professorblue.com shares the same name server setup as ysyit.com, avisjersey.co.uk, ufeel.me, payroll.co.im and kingrootofficial.com.

professorblue.com at least partially shares name servers with other domains, for instance fullbooks.info, zp-a.com, jbcandcompany.com, turkhairtrans.com and vbetk.com.

these name servers are often used in conjunction with the name servers kim.ns.cloudflare.com.

Host names with six IP numbers:

ivy.ns.cloudflare.com points to 2606:4700:50::adf5:3a78, 2803:f800:50::6ca2:c078, 2a06:98c1:50::ac40:2078, 108.162.192.120, 172.64.32.120 and 173.245.58.120.

todd.ns.cloudflare.com points to 2606:4700:58::adf5:3b92, 2803:f800:50::6ca2:c192, 2a06:98c1:50::ac40:2192, 108.162.193.146, 172.64.33.146 and 173.245.59.146.

Mail Servers

professorblue.com is handled by two mail servers: mx1.privateemail.com and mx2.privateemail.com.

The mail server setup for professorblue.com matches that of other domains, for instance eridez.com.au, abdull.dev, aapars.com, tombotechnologies.com and lokaltrip.com.

professorblue.com shares some mail servers with other domains, at least partially, for example braverman-clb.com, bnbit.com, rocklakemed.com and retro.gg.

Host names with a single IP:

mx1.privateemail.com points to 162.255.118.7.

mx2.privateemail.com points to 162.255.118.8.

professorblue.com - robtex.com