`miamiheartstudy.com`

DNSSEC	⚠️ Not signed
A	2606:4700::6812:1ef3^{🇺🇸 Cloudflare2606:4700::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700::6812:1ff3^{🇺🇸 Cloudflare2606:4700::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.18.30.243^{Cloudflare104.18.16.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.18.31.243^{Cloudflare104.18.16.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`blue.foundationdns.com` ⭐
		A	2606:4700:57::6ca2:c601^{🇺🇸 Cloudflare2606:4700:57::/48}
			PTR	`blue.foundationdns.com`
		A	2803:f800:52::a29f:3c01^{🇨🇷 Cloudflare2803:f800:52::/48 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`blue.foundationdns.com`
		A	2a06:98c1:56::ac40:2801^{🇺🇸 Cloudflare2a06:98c1:56::/48}
			PTR	`blue.foundationdns.com`
		A	108.162.198.1^{🇺🇸 Cloudflare108.162.198.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`blue.foundationdns.com`
		A	162.159.60.1^{Cloudflare162.159.60.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`blue.foundationdns.com`
		A	172.64.40.1^{🇺🇸 Cloudflare172.64.40.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`blue.foundationdns.com`
NS	`blue.foundationdns.net`
		A	2606:4700:57::6ca2:c61f^{🇺🇸 Cloudflare2606:4700:57::/48}
			PTR	`blue.foundationdns.net`
		A	2803:f800:52::a29f:3c1f^{🇨🇷 Cloudflare2803:f800:52::/48 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`blue.foundationdns.net`
		A	2a06:98c1:56::ac40:281f^{🇺🇸 Cloudflare2a06:98c1:56::/48}
			PTR	`blue.foundationdns.net`
		A	108.162.198.31^{🇺🇸 Cloudflare108.162.198.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`blue.foundationdns.net`
		A	162.159.60.31^{Cloudflare162.159.60.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`blue.foundationdns.net`
		A	172.64.40.31^{🇺🇸 Cloudflare172.64.40.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`blue.foundationdns.net`
NS	`blue.foundationdns.org`
		A	2606:4700:57::6ca2:c63d^{🇺🇸 Cloudflare2606:4700:57::/48}
			PTR	`blue.foundationdns.org`
		A	2803:f800:52::a29f:3c3d^{🇨🇷 Cloudflare2803:f800:52::/48 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`blue.foundationdns.org`
		A	2a06:98c1:56::ac40:283d^{🇺🇸 Cloudflare2a06:98c1:56::/48}
			PTR	`blue.foundationdns.org`
		A	108.162.198.61^{🇺🇸 Cloudflare108.162.198.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`blue.foundationdns.org`
		A	162.159.60.61^{Cloudflare162.159.60.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`blue.foundationdns.org`
		A	172.64.40.61^{🇺🇸 Cloudflare172.64.40.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`blue.foundationdns.org`
TXT	`v=spf1 -all`
HTTPS	HTTP/2 ✓ hints match
		IPv4 hints	104.18.30.243, 104.18.31.243
		IPv6 hints	2606:4700::6812:1ef3, 2606:4700::6812:1ff3
SOA	`blue.foundationdns.com`dns@cloudflare.com serial=2399522830

`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=1777412406

Same first word

miamiheartstudy.org

miamiheartstudy.com

DNS History

12 records (7 active, 5 former)

●NSblue.foundationdns.com2026-02-22 → 2026-04-28 · 3 obs

○ 2018-01-16 22:57:44
● 2026-02-22 02:29:04
● 2026-04-28 21:55:28

●NSblue.foundationdns.net2026-02-22 → 2026-04-28 · 3 obs

○ 2018-01-16 22:57:44
● 2026-02-22 02:29:04
● 2026-04-28 21:55:28

●NSblue.foundationdns.org2026-02-22 → 2026-04-28 · 3 obs

○ 2018-01-16 22:57:44
● 2026-02-22 02:29:04
● 2026-04-28 21:55:28

○NSfoghorn.baptisthealth.net2015-05-22 → 2018-01-16 · 4 obs

● 2015-05-22 11:52:50
● 2018-01-16 22:57:44
○ 2026-02-22 02:29:04
○ 2026-04-28 21:55:28

○NSleghorn.baptisthealth.net2015-05-22 → 2018-01-16 · 4 obs

● 2015-05-22 11:52:50
● 2018-01-16 22:57:44
○ 2026-02-22 02:29:04
○ 2026-04-28 21:55:28

○NSns2.cl.bellsouth.net2015-05-22 → 2018-01-16 · 4 obs

● 2015-05-22 11:52:50
● 2018-01-16 22:57:44
○ 2026-02-22 02:29:04
○ 2026-04-28 21:55:28

○NSns3.cl.bellsouth.net2015-05-22 → 2018-01-16 · 4 obs

● 2015-05-22 11:52:50
● 2018-01-16 22:57:44
○ 2026-02-22 02:29:04
○ 2026-04-28 21:55:28

●A104.18.30.2432026-02-22 → 2026-04-28 · 3 obs

○ 2018-01-16 22:57:44
● 2026-02-22 02:29:04
● 2026-04-28 21:55:28

●A104.18.31.2432026-02-22 → 2026-04-28 · 3 obs

○ 2018-01-16 22:57:44
● 2026-02-22 02:29:04
● 2026-04-28 21:55:28

○A198.160.135.12015-05-22 → 2018-01-16 · 4 obs

● 2015-05-22 11:52:50
● 2018-01-16 22:57:44
○ 2026-02-22 02:29:04
○ 2026-04-28 21:55:28

●A2606:4700::6812:1ef32026-02-22 → 2026-04-28 · 3 obs

○ 2018-01-16 22:57:44
● 2026-02-22 02:29:04
● 2026-04-28 21:55:28

●A2606:4700::6812:1ff32026-02-22 → 2026-04-28 · 3 obs

○ 2018-01-16 22:57:44
● 2026-02-22 02:29:04
● 2026-04-28 21:55:28

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	l.gtld-servers.net, j.gtld-servers.net, h.gtld-servers.net, d.gtld-servers.net...	-
miamiheartstudy.com	blue.foundationdns.com, blue.foundationdns.net, blue.foundationdns.org	6 records

✅ Authoritative Response

Server:108.162.198.1

NS records: blue.foundationdns.com, blue.foundationdns.net, blue.foundationdns.org

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for miamiheartstudy.com (unsigned zone)

⏱️ Timing

Total: 409ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.18.31.243, 104.18.30.243`
AAAA	2	`2606:4700::6812:1ef3, 2606:4700::6812:1ff3`
NS	3	`blue.foundationdns.com, blue.foundationdns.net...`
TXT	1	`v=spf1 -all`
HTTPS	1	`{"priority":1,"target":".","alpn":["h2"]`
SOA	1	`blue.foundationdns.com dns.cloudflare.co`

📌 Glue Records Collected

Total: 6

Out-of-bailiwick: 6 (blue.foundationdns.com, blue.foundationdns.com, blue.foundationdns.com...)

Analysis

IP Addresses

miamiheartstudy.com points to four IP numbers: 2606:4700::6812:1ef3, 2606:4700::6812:1ff3, 104.18.30.243 and 104.18.31.243.

For instance, other host names sacebtonline.it, proxy.zerion.io, ubuy.com.jo, api.zerion.io and api-testnet.zerion.io share IP numbers with miamiheartstudy.com.

Name Servers

The delegation for miamiheartstudy.com is handled by three name servers: blue.foundationdns.com, blue.foundationdns.net and blue.foundationdns.org.

miamiheartstudy.com shares name servers with other domains at least partially, for example branddesigninternational.com, xn--q8q549o.com, shopify-plus.com, essenceuniverse.com and saltlake2002.utah.edu.

these name servers are commonly used together with the name servers ns.utah.edu, dns1.p01.nsone.net, dns2.p01.nsone.net, dns3.p01.nsone.net, dns4.p01.nsone.net, fiber.utah.edu, ns5.utah.edu and ns6.utah.edu.

Host names with six IP numbers:

blue.foundationdns.com points to 2606:4700:57::6ca2:c601, 2803:f800:52::a29f:3c01, 2a06:98c1:56::ac40:2801, 108.162.198.1, 162.159.60.1 and 172.64.40.1.

blue.foundationdns.net points to 2606:4700:57::6ca2:c61f, 2803:f800:52::a29f:3c1f, 2a06:98c1:56::ac40:281f, 108.162.198.31, 162.159.60.31 and 172.64.40.31.

blue.foundationdns.org points to 2606:4700:57::6ca2:c63d, 2803:f800:52::a29f:3c3d, 2a06:98c1:56::ac40:283d, 108.162.198.61, 162.159.60.61 and 172.64.40.61.

miamiheartstudy.com - robtex.com