heartmathlearning.org - dns.ninja

`heartmathlearning.org`

DNSSEC	⚠️ Not signed
A	2606:4700:3031::6815:19b1^{🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3031::ac43:866f^{🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.25.177^{Cloudflare104.21.16.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.134.111^{🇺🇸 Cloudflare172.67.128.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`algin.ns.cloudflare.com` ⭐
		A	2606:4700:58::adf5:3b3d^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`algin.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c13d^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`algin.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:213d^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`algin.ns.cloudflare.com`
		A	108.162.193.61^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`algin.ns.cloudflare.com`
		A	172.64.33.61^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`algin.ns.cloudflare.com`
		A	173.245.59.61^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`algin.ns.cloudflare.com`
NS	`melinda.ns.cloudflare.com`
		A	2606:4700:50::adf5:3ac6^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`melinda.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c0c6^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`melinda.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:20c6^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`melinda.ns.cloudflare.com`
		A	108.162.192.198^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`melinda.ns.cloudflare.com`
		A	172.64.32.198^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`melinda.ns.cloudflare.com`
		A	173.245.58.198^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`melinda.ns.cloudflare.com`
MX	`mxa.mailgun.org` ⭐
		A	34.36.182.139^{🇺🇸 Google34.32.0.0/11}
			PTR	`139.182.36.34.bc.googleusercontent.com`
MX	`mxb.mailgun.org` ⭐
		A	34.36.182.139^{🇺🇸 Google34.32.0.0/11}
			PTR	`139.182.36.34.bc.googleusercontent.com`
TXT	`google-site-verification=3O6ArtUGpo4ip34z__86u1Xt18qz6u-qhTxmtvvTQ9A`
TXT	`google-site-verification=QMp_XdldcdLdVcZxWyBHkp7uLAafEleOR8bESTdVRdc`
TXT	`google-site-verification=sFHTfSSiwXghhb9iNiKVbtZc1xSOFq2kkGT8pzPN85w`
TXT	`v=spf1 include:mailgun.org ~all`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.25.177, 172.67.134.111
		IPv6 hints	2606:4700:3031::6815:19b1, 2606:4700:3031::ac43:866f
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=225, name=cloudflare-ech.com
SOA	`algin.ns.cloudflare.com`dns@cloudflare.com serial=2410903006

`org`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a0.org.afilias-nst.info` ⭐ ⚠️ Not in parent delegation
	NS	`a2.org.afilias-nst.info` ⚠️ Not in parent delegation
	NS	`b0.org.afilias-nst.org`
	NS	`b2.org.afilias-nst.org`
	NS	`c0.org.afilias-nst.info` ⚠️ Not in parent delegation
	NS	`d0.org.afilias-nst.org`
	SOA	`a0.org.afilias-nst.info`hostmaster@donuts.email serial=1785793264

Same first word

heartmathlearning.org

DNS History

10 records (8 active, 2 former)

●NSalgin.ns.cloudflare.com2026-06-10 → 2026-08-03 · 2 obs

● 2026-06-10 20:01:56
● 2026-08-03 22:19:12

●NSmelinda.ns.cloudflare.com2026-06-10 → 2026-08-03 · 2 obs

● 2026-06-10 20:01:56
● 2026-08-03 22:19:12

●MXmxa.mailgun.org2026-06-10 → 2026-08-03 · 2 obs

● 2026-06-10 20:01:56
● 2026-08-03 22:19:12

●MXmxb.mailgun.org2026-06-10 → 2026-08-03 · 2 obs

● 2026-06-10 20:01:56
● 2026-08-03 22:19:12

●A104.21.25.1772026-06-10 → 2026-08-03 · 2 obs

● 2026-06-10 20:01:56
● 2026-08-03 22:19:12

●A172.67.134.1112026-06-10 → 2026-08-03 · 2 obs

● 2026-06-10 20:01:56
● 2026-08-03 22:19:12

●A2606:4700:3031::6815:19b12026-07-19 → 2026-08-03 · 3 obs

○ 2026-06-10 22:42:22
● 2026-07-19 14:48:04
● 2026-08-03 22:19:12

●A2606:4700:3031::ac43:866f2026-07-19 → 2026-08-03 · 3 obs

○ 2026-06-10 22:42:22
● 2026-07-19 14:48:04
● 2026-08-03 22:19:12

○A2606:4700:3033::6815:19b12026-06-10 → 2026-06-10 · 4 obs

● 2026-06-10 20:01:56
● 2026-06-10 22:42:22
○ 2026-07-19 14:48:04
○ 2026-08-03 22:19:12

○A2606:4700:3034::ac43:866f2026-06-10 → 2026-06-10 · 4 obs

● 2026-06-10 20:01:56
● 2026-06-10 22:42:22
○ 2026-07-19 14:48:04
○ 2026-08-03 22:19:12

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
org	d0.org.afilias-nst.org, b2.org.afilias-nst.org, b0.org.afilias-nst.org	-
heartmathlearning.org	melinda.ns.cloudflare.com, algin.ns.cloudflare.com	-

✅ Authoritative Response

Server:172.64.33.61

NS records: melinda.ns.cloudflare.com, algin.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for heartmathlearning.org (unsigned zone)

⏱️ Timing

Total: 388ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.67.134.111, 104.21.25.177`
AAAA	2	`2606:4700:3031::ac43:866f, 2606:4700:3031::6815:19b1`
NS	2	`algin.ns.cloudflare.com, melinda.ns.cloudflare.com`
MX	2	`mxa.mailgun.org (pri: 0), mxb.mailgun.org (pri: 0)`
TXT	4	`google-site-verification=3O6ArtUGpo4ip34, google-site-verification=QMp_XdldcdLdVcZ...`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`algin.ns.cloudflare.com dns.cloudflare.c`

Analysis

IP Addresses

heartmathlearning.org resolves to four IP addresses: 104.21.25.177, 172.67.134.111, 2606:4700:3031::6815:19b1 and 2606:4700:3031::ac43:866f.

Among the host names that share IP numbers with heartmathlearning.org are turenovalithq.com, hj251012b9.top, xianxiaqingyuan.com and two others.

Name Servers

Two name servers handle the delegation for heartmathlearning.org: algin.ns.cloudflare.com and melinda.ns.cloudflare.com.

heartmathlearning.org has the same name server delegation as a number of other domains, such as gcp2.net, great(0x736578)moms.com, datenightwingman.com and two more.

heartmathlearning.org has at least partial name server overlap with other domains, such as 7hillsproductions.com, onkeller.com, siapaahk.online and two others.

It is common to see these name servers used together with name servers grace.ns.cloudflare.com and arya.ns.cloudflare.com.

Host names resolving to 6 IP numbers:

algin.ns.cloudflare.com resolves to 108.162.193.61, 172.64.33.61 and 173.245.59.61 among others, with 3 other IP addresses in total.

melinda.ns.cloudflare.com resolves to 108.162.192.198, 172.64.32.198 and 173.245.58.198 among others, with 3 other IP addresses in total.

Mail Servers

The MX records for heartmathlearning.org point to two mail servers: mxa.mailgun.org and mxb.mailgun.org.

heartmathlearning.org has the same mail server arrangement as a number of other domains, for example exp0.app, shanghaitech.org, baskico.com and two more.

heartmathlearning.org shares at least some of its mail servers with other domains — for example fenechconstructionsfi.com, orlandoarealuxuryrentals.com, grabarte.com and two more.

These mail servers tend to be used in combination with the mail servers aspmx.l.google.com and alt1.aspmx.l.google.com.

mxa.mailgun.org directs to 34.36.182.139, as does mxb.mailgun.org — both hostnames resolve to that one IP address.

mxa.mailgun.org along with mxb.mailgun.org each resolve to 34.36.182.139 IP addresses.