gregcoxphd.com - dns.ninja

`gregcoxphd.com`

DNSSEC	⚠️ Not signed
A	2606:4700:3030::ac43:d7ea^{🇺🇸 Cloudflare2606:4700:3030::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3034::6815:10cd^{🇺🇸 Cloudflare2606:4700:3034::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.16.205^{Cloudflare104.21.16.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.215.234^{🇺🇸 Cloudflare172.67.208.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`mark.ns.cloudflare.com` ⭐
		A	2606:4700:58::adf5:3b82^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`mark.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c182^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`mark.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2182^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`mark.ns.cloudflare.com`
		A	108.162.193.130^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`mark.ns.cloudflare.com`
		A	172.64.33.130^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`mark.ns.cloudflare.com`
		A	173.245.59.130^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`mark.ns.cloudflare.com`
NS	`zoe.ns.cloudflare.com`
		A	2606:4700:50::adf5:3a95^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`zoe.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c095^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`zoe.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2095^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`zoe.ns.cloudflare.com`
		A	108.162.192.149^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`zoe.ns.cloudflare.com`
		A	172.64.32.149^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`zoe.ns.cloudflare.com`
		A	173.245.58.149^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`zoe.ns.cloudflare.com`
MX	`aspmx.l.google.com` ⭐
		A	2607:f8b0:4004:c08::1b^{🇺🇸 Google2607:f8b0:4004::/48}
			PTR	`bi-in-f27.1e100.net`
		A	64.233.180.27^{🇺🇸 Google64.233.180.0/24}
			PTR	`on-in-f27.1e100.net`
			PTR	`pe-in-f27.1e100.net`
MX	`alt1.aspmx.l.google.com`⁽⁵⁾
		A	2800:3f0:4003:c14::1a^{🇨🇱 Google2800:3f0:4003::/48}
		A	192.178.234.27^{🇺🇸 Google192.178.0.0/15}
			PTR	`ncsclj-in-f27.1e100.net`
MX	`alt2.aspmx.l.google.com`⁽⁵⁾
		A	2a00:1450:400b:c02::1b^{🇮🇪 Google2a00:1450:400b::/48}
			PTR	`dj-in-f27.1e100.net`
		A	172.253.116.27^{🇺🇸 Google172.253.116.0/24}
			PTR	`dj-in-f27.1e100.net`
MX	`alt3.aspmx.l.google.com`⁽¹⁰⁾
		A	2a00:1450:4009:c0f::1a^{🇬🇧 Google2a00:1450:4009::/48}
			PTR	`yulhrs-in-f26.1e100.net`
		A	192.178.223.27^{🇺🇸 Google192.178.223.0/24}
			PTR	`yulhrs-in-f27.1e100.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	172.253.157.27^{🇺🇸 Google172.253.0.0/16}
			PTR	`yubrupd-in-f27.1e100.net`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.16.205, 172.67.215.234
		IPv6 hints	2606:4700:3030::ac43:d7ea, 2606:4700:3034::6815:10cd
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=15, name=cloudflare-ech.com
SOA	`mark.ns.cloudflare.com`dns@cloudflare.com serial=2409827218

`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=1786364829

Subdomains

www.gregcoxphd.com

Same first word

gregcoxphd.com

DNS History

23 records (11 active, 12 former)

●NSmark.ns.cloudflare.com2026-03-23 → 2026-08-10 · 3 obs

○ 2019-01-17 16:29:24
● 2026-03-23 21:42:52
● 2026-08-10 12:35:10

○NSns1.justhost.com2015-08-22 → 2019-01-17 · 4 obs

● 2015-08-22 06:54:54
● 2019-01-17 16:29:24
○ 2026-03-23 21:42:52
○ 2026-08-10 12:35:10

○NSns2.justhost.com2015-08-22 → 2019-01-17 · 4 obs

● 2015-08-22 06:54:54
● 2019-01-17 16:29:24
○ 2026-03-23 21:42:52
○ 2026-08-10 12:35:10

●NSzoe.ns.cloudflare.com2026-03-23 → 2026-08-10 · 3 obs

○ 2019-01-17 16:29:24
● 2026-03-23 21:42:52
● 2026-08-10 12:35:10

●MXalt1.aspmx.l.google.com2015-08-22 → 2026-08-10 · 2 obs

● 2015-08-22 06:54:54
● 2026-08-10 12:35:10

●MXalt2.aspmx.l.google.com2015-08-22 → 2026-08-10 · 2 obs

● 2015-08-22 06:54:54
● 2026-08-10 12:35:10

●MXalt3.aspmx.l.google.com2026-03-23 → 2026-08-10 · 3 obs

○ 2019-01-17 16:29:24
● 2026-03-23 21:42:52
● 2026-08-10 12:35:10

●MXalt4.aspmx.l.google.com2026-03-23 → 2026-08-10 · 3 obs

○ 2019-01-17 16:29:24
● 2026-03-23 21:42:52
● 2026-08-10 12:35:10

●MXaspmx.l.google.com2015-08-22 → 2026-08-10 · 2 obs

● 2015-08-22 06:54:54
● 2026-08-10 12:35:10

○MXaspmx2.googlemail.com2015-08-22 → 2019-01-17 · 4 obs

● 2015-08-22 06:54:54
● 2019-01-17 16:29:24
○ 2026-03-23 21:42:52
○ 2026-08-10 12:35:10

○MXaspmx3.googlemail.com2015-08-22 → 2019-01-17 · 4 obs

● 2015-08-22 06:54:54
● 2019-01-17 16:29:24
○ 2026-03-23 21:42:52
○ 2026-08-10 12:35:10

●A104.21.16.2052026-03-23 → 2026-08-10 · 14 obs

○ 2019-01-17 16:29:24
● 2026-03-23 21:42:52
○ 2026-03-24 19:44:38
● 2026-03-31 02:40:08
○ 2026-03-31 15:34:30
● 2026-04-03 13:02:54
● 2026-05-27 21:36:40
○ 2026-05-30 07:56:54
○ 2026-05-30 08:29:44
● 2026-05-30 10:13:36
● 2026-06-09 18:24:26
○ 2026-06-18 23:14:32
● 2026-07-20 21:42:02
● 2026-08-10 12:35:10

○A146.148.41.1002017-02-17 → 2019-01-17 · 5 obs

○ 2016-06-27 15:42:26
● 2017-02-17 18:07:24
● 2019-01-17 16:29:24
○ 2026-03-23 21:42:52
○ 2026-08-10 12:35:10

●A172.67.215.2342026-03-23 → 2026-08-10 · 14 obs

○A188.114.96.02026-03-24 → 2026-06-18 · 13 obs

○ 2026-03-23 21:42:52
● 2026-03-24 19:44:38
○ 2026-03-31 02:40:08
● 2026-03-31 15:34:30
○ 2026-04-03 13:02:54
○ 2026-05-27 21:36:40
● 2026-05-30 07:56:54
● 2026-05-30 08:29:44
○ 2026-05-30 10:13:36
○ 2026-06-09 18:24:26
● 2026-06-18 23:14:32
○ 2026-07-20 21:42:02
○ 2026-08-10 12:35:10

○A188.114.97.02026-03-24 → 2026-06-18 · 13 obs

●A2606:4700:3030::ac43:d7ea2026-07-20 → 2026-08-10 · 3 obs

○ 2026-06-18 23:14:32
● 2026-07-20 21:42:02
● 2026-08-10 12:35:10

○A2606:4700:3032::6815:10cd2026-03-23 → 2026-06-09 · 13 obs

●A2606:4700:3034::6815:10cd2026-07-20 → 2026-08-10 · 3 obs

○ 2026-06-18 23:14:32
● 2026-07-20 21:42:02
● 2026-08-10 12:35:10

○A2606:4700:3037::ac43:d7ea2026-03-23 → 2026-06-09 · 13 obs

○A2a06:98c1:3120::2026-03-24 → 2026-06-18 · 13 obs

○A2a06:98c1:3121::2026-03-24 → 2026-06-18 · 13 obs

○A50.116.50.262015-08-22 → 2016-06-27 · 4 obs

● 2015-08-22 06:54:54
● 2016-06-27 15:42:26
○ 2017-02-17 18:07:24
○ 2026-08-10 12:35:10

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	c.gtld-servers.net, e.gtld-servers.net, k.gtld-servers.net, f.gtld-servers.net...	-
gregcoxphd.com	mark.ns.cloudflare.com, zoe.ns.cloudflare.com	12 records

✅ Authoritative Response

Server:108.162.193.130

NS records: mark.ns.cloudflare.com, zoe.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for gregcoxphd.com (unsigned zone)

⏱️ Timing

Total: 257ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.21.16.205, 172.67.215.234`
AAAA	2	`2606:4700:3030::ac43:d7ea, 2606:4700:3034::6815:10cd`
NS	2	`mark.ns.cloudflare.com, zoe.ns.cloudflare.com`
MX	5	`aspmx.l.google.com (pri: 1), alt3.aspmx.l.google.com (pri: 10)...`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`mark.ns.cloudflare.com dns.cloudflare.co`

📌 Glue Records Collected

Total: 12

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

Analysis

Hierarchy

gregcoxphd.com is a parent domain of www.gregcoxphd.com.

IP Addresses

gregcoxphd.com resolves to four IP addresses: 104.21.16.205, 172.67.215.234, 2606:4700:3030::ac43:d7ea and 2606:4700:3034::6815:10cd.

pythonacon.org, consequentia.se, x0g4p49p.com plus two other host names have IP numbers in common with gregcoxphd.com.

Name Servers

gregcoxphd.com has two authoritative name servers — mark.ns.cloudflare.com and zoe.ns.cloudflare.com.

The name server configuration of gregcoxphd.com is shared with other domains, for instance primecountry.com, manuellavandenbosch.be, linuxcontainers.com and two others.

gregcoxphd.com shares at least some of its name servers with other domains, including koaladesign.com.mx, trulaintfcu.com, postosjpsantalucia.com.br and two others.

These name servers are frequently paired with the name servers aiden.ns.cloudflare.com and princess.ns.cloudflare.com.

Hosts with 6 IP addresses each:

mark.ns.cloudflare.com points to 108.162.193.130, 172.64.33.130, 173.245.59.130 and 3 other IP addresses.

zoe.ns.cloudflare.com points to 108.162.192.149, 172.64.32.149, 173.245.58.149 and 3 other IP addresses.

Mail Servers

gregcoxphd.com is handled by five mail servers: aspmx.l.google.com, alt1.aspmx.l.google.com, alt2.aspmx.l.google.com and two others.

At least some of the mail servers used by gregcoxphd.com are shared with other domains: conversionsforsale.com, noblegenius.com, datapingpong.com and two others among them.

These mail servers often appear in conjunction with the mail servers alt3.aspmx.l.google.com, alt4.aspmx.l.google.com, aspmx3.googlemail.com and aspmx2.googlemail.com.

Host names pointing to two IP addresses:

aspmx.l.google.com resolves to 64.233.180.27 and 2607:f8b0:4004:c08::1b.

alt1.aspmx.l.google.com resolves to 192.178.234.27 and 2800:3f0:4003:c14::1a.

alt2.aspmx.l.google.com resolves to 172.253.116.27 and 2a00:1450:400b:c02::1b.

alt3.aspmx.l.google.com resolves to 192.178.223.27 and 2a00:1450:4009:c0f::1a.

alt4.aspmx.l.google.com resolves to 172.253.157.27 and 2a00:1450:400c:c23::1a.