`schoolrubric.org`

DNSSEC	⚠️ Not signed
A	2606:4700:3031::6815:3d4a^{🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3032::ac43:cf5e^{🇺🇸 Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.61.74^{Cloudflare104.21.48.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.207.94^{🇺🇸 Cloudflare172.67.192.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`howard.ns.cloudflare.com` ⭐
		A	2606:4700:58::a29f:2cab^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`howard.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c3ab^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`howard.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:23ab^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`howard.ns.cloudflare.com`
		A	108.162.195.171^{🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`howard.ns.cloudflare.com`
		A	162.159.44.171^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`howard.ns.cloudflare.com`
		A	172.64.35.171^{🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`howard.ns.cloudflare.com`
NS	`rihana.ns.cloudflare.com`
		A	2606:4700:50::adf5:3af4^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`rihana.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c0f4^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`rihana.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:20f4^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`rihana.ns.cloudflare.com`
		A	108.162.192.244^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`rihana.ns.cloudflare.com`
		A	172.64.32.244^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`rihana.ns.cloudflare.com`
		A	173.245.58.244^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`rihana.ns.cloudflare.com`
MX	`aspmx.l.google.com` ⭐
		A	2607:f8b0:4004:c2d::1b^{🇺🇸 Google2607:f8b0:4004::/48}
			PTR	`ry-in-f27.1e100.net`
		A	142.251.163.27^{🇺🇸 Google142.251.163.0/24}
			PTR	`wv-in-f27.1e100.net`
MX	`alt1.aspmx.l.google.com`⁽⁵⁾
		A	2800:3f0:4003:c0f::1b^{🇨🇱 Google2800:3f0:4003::/48}
		A	108.177.123.26^{🇺🇸 Google108.177.123.0/24}
			PTR	`lcscld-in-f26.1e100.net`
MX	`alt2.aspmx.l.google.com`⁽⁵⁾
		A	2a00:1450:400b:c01::1b^{🇮🇪 Google2a00:1450:400b::/48}
			PTR	`di-in-f27.1e100.net`
		A	74.125.193.27^{🇺🇸 Google74.125.193.0/24}
			PTR	`di-in-f27.1e100.net`
			PTR	`ig-in-f27.1e100.net`
MX	`alt3.aspmx.l.google.com`⁽¹⁰⁾
		A	2a00:1450:4009:c0f::1b^{🇬🇧 Google2a00:1450:4009::/48}
			PTR	`yulhrs-in-f27.1e100.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	172.253.157.26^{🇺🇸 Google172.253.0.0/16}
			PTR	`yubrupd-in-f26.1e100.net`
TXT	`google-site-verification=VSbifOMyPJmVarkYVf1QovtpU2fSTozvk6LASGfksaY`
TXT	`v=spf1 include:_spf.google.com ~all`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.61.74, 172.67.207.94
		IPv6 hints	2606:4700:3031::6815:3d4a, 2606:4700:3032::ac43:cf5e
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=95, name=cloudflare-ech.com
SOA	`howard.ns.cloudflare.com`dns@cloudflare.com serial=2407655297

`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=1785516954

Same first word

schoolrubric.org

DNS History

20 records (11 active, 9 former)

●NShoward.ns.cloudflare.com2026-04-27 → 2026-07-31 · 2 obs

● 2026-04-27 11:32:58
● 2026-07-31 17:34:20

●NSrihana.ns.cloudflare.com2026-04-27 → 2026-07-31 · 2 obs

● 2026-04-27 11:32:58
● 2026-07-31 17:34:20

●MXalt1.aspmx.l.google.com2026-04-27 → 2026-07-31 · 2 obs

● 2026-04-27 11:32:58
● 2026-07-31 17:34:20

●MXalt2.aspmx.l.google.com2026-04-27 → 2026-07-31 · 2 obs

● 2026-04-27 11:32:58
● 2026-07-31 17:34:20

●MXalt3.aspmx.l.google.com2026-04-27 → 2026-07-31 · 2 obs

● 2026-04-27 11:32:58
● 2026-07-31 17:34:20

●MXalt4.aspmx.l.google.com2026-04-27 → 2026-07-31 · 2 obs

● 2026-04-27 11:32:58
● 2026-07-31 17:34:20

●MXaspmx.l.google.com2026-04-27 → 2026-07-31 · 2 obs

● 2026-04-27 11:32:58
● 2026-07-31 17:34:20

●A104.21.61.742026-04-27 → 2026-07-31 · 19 obs

● 2026-04-27 11:32:58
● 2026-05-01 11:12:44
○ 2026-05-04 05:05:16
○ 2026-05-07 00:54:08
● 2026-05-09 17:20:02
○ 2026-05-11 16:41:54
● 2026-05-18 07:28:04
● 2026-05-20 19:05:00
○ 2026-05-25 02:02:22
● 2026-05-27 10:39:38
● 2026-06-07 05:12:54
○ 2026-06-08 10:32:46
○ 2026-06-15 06:09:22
● 2026-06-16 00:19:46
○ 2026-06-22 08:20:00
● 2026-07-13 08:53:34
○ 2026-07-20 03:34:16
● 2026-07-27 07:54:40
● 2026-07-31 17:34:20

●A172.67.207.942026-04-27 → 2026-07-31 · 19 obs

○A188.114.96.02026-05-04 → 2026-07-20 · 20 obs

○ 2026-05-01 11:12:44
● 2026-05-04 05:05:16
● 2026-05-07 00:54:08
○ 2026-05-09 17:20:02
● 2026-05-11 16:41:54
○ 2026-05-18 07:28:04
○ 2026-05-20 19:05:00
● 2026-05-25 02:02:22
○ 2026-05-27 10:39:38
○ 2026-06-07 05:12:54
● 2026-06-08 10:32:46
● 2026-06-15 06:09:22
○ 2026-06-16 00:19:46
● 2026-06-22 08:54:00
○ 2026-07-13 02:02:04
● 2026-07-13 02:39:28
○ 2026-07-13 08:53:34
● 2026-07-20 03:34:16
○ 2026-07-27 07:54:40
○ 2026-07-31 17:34:20

○A188.114.96.42026-06-22 → 2026-07-13 · 6 obs

○ 2026-06-21 00:44:56
● 2026-06-22 08:20:00
○ 2026-06-22 08:54:00
● 2026-07-13 02:02:04
○ 2026-07-13 02:39:28
○ 2026-07-31 17:34:20

○A188.114.97.02026-05-04 → 2026-07-20 · 20 obs

○A188.114.97.42026-06-22 → 2026-07-13 · 6 obs

○ 2026-06-21 00:44:56
● 2026-06-22 08:20:00
○ 2026-06-22 08:54:00
● 2026-07-13 02:02:04
○ 2026-07-13 02:39:28
○ 2026-07-31 17:34:20

●A2606:4700:3031::6815:3d4a2026-06-21 → 2026-07-31 · 7 obs

○ 2026-06-16 00:19:46
● 2026-06-21 00:44:56
○ 2026-06-22 08:20:00
● 2026-07-13 08:53:34
○ 2026-07-20 03:34:16
● 2026-07-27 07:54:40
● 2026-07-31 17:34:20

●A2606:4700:3032::ac43:cf5e2026-04-27 → 2026-07-31 · 20 obs

● 2026-04-27 11:32:58
● 2026-05-01 11:12:44
○ 2026-05-04 05:05:16
○ 2026-05-07 00:54:08
● 2026-05-09 17:20:02
○ 2026-05-11 16:41:54
● 2026-05-18 07:28:04
○ 2026-05-19 03:09:44
● 2026-05-20 19:05:00
○ 2026-05-25 02:02:22
● 2026-05-27 10:39:38
● 2026-06-07 05:12:54
○ 2026-06-08 10:32:46
○ 2026-06-15 06:09:22
● 2026-06-16 00:19:46
○ 2026-06-22 08:20:00
● 2026-07-13 08:53:34
○ 2026-07-20 03:34:16
● 2026-07-27 07:54:40
● 2026-07-31 17:34:20

○A2606:4700:3037::6815:3d4a2026-04-27 → 2026-06-16 · 17 obs

○A2a06:98c1:3120::2026-05-04 → 2026-07-20 · 19 obs

○ 2026-05-01 11:12:44
● 2026-05-04 05:05:16
● 2026-05-07 00:54:08
○ 2026-05-09 17:20:02
● 2026-05-11 16:41:54
○ 2026-05-18 07:28:04
● 2026-05-19 03:09:44
○ 2026-05-20 19:05:00
● 2026-05-25 02:02:22
○ 2026-05-27 10:39:38
○ 2026-06-07 05:12:54
● 2026-06-08 10:32:46
● 2026-06-15 06:09:22
○ 2026-06-16 00:19:46
● 2026-06-22 08:54:00
○ 2026-07-13 08:53:34
● 2026-07-20 03:34:16
○ 2026-07-27 07:18:32
○ 2026-07-31 17:34:20

○A2a06:98c1:3120::42026-06-22 → 2026-07-27 · 6 obs

○ 2026-06-21 00:44:56
● 2026-06-22 08:20:00
○ 2026-06-22 08:54:00
● 2026-07-27 07:18:32
○ 2026-07-27 07:54:40
○ 2026-07-31 17:34:20

○A2a06:98c1:3121::2026-05-04 → 2026-07-20 · 19 obs

○A2a06:98c1:3121::42026-06-22 → 2026-07-27 · 6 obs

○ 2026-06-21 00:44:56
● 2026-06-22 08:20:00
○ 2026-06-22 08:54:00
● 2026-07-27 07:18:32
○ 2026-07-27 07:54:40
○ 2026-07-31 17:34:20

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
org	b0.org.afilias-nst.org, b2.org.afilias-nst.org, d0.org.afilias-nst.org	-
schoolrubric.org	howard.ns.cloudflare.com, rihana.ns.cloudflare.com	-

✅ Authoritative Response

Server:172.64.32.244

NS records: howard.ns.cloudflare.com, rihana.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for schoolrubric.org (unsigned zone)

⏱️ Timing

Total: 438ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.67.207.94, 104.21.61.74`
AAAA	2	`2606:4700:3032::ac43:cf5e, 2606:4700:3031::6815:3d4a`
NS	2	`howard.ns.cloudflare.com, rihana.ns.cloudflare.com`
MX	5	`aspmx.l.google.com (pri: 1), alt3.aspmx.l.google.com (pri: 10)...`
TXT	2	`google-site-verification=VSbifOMyPJmVark, v=spf1 include:_spf.google.com ~all`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`howard.ns.cloudflare.com dns.cloudflare.`

Analysis

IP Addresses

schoolrubric.org points to the four IP addresses 104.21.61.74, 172.67.207.94, 2606:4700:3031::6815:3d4a and 2606:4700:3032::ac43:cf5e.

Additional host names — paganarts.co.uk, www.culturing.kr, bigwatermelon.top and two others — share IP numbers with schoolrubric.org.

Name Servers

schoolrubric.org is served by two delegated name servers, howard.ns.cloudflare.com and rihana.ns.cloudflare.com.

schoolrubric.org shares its name server setup with other domains, including ebony(0x706f726e)ka.com, sored.pl, ebony(0x706f726e)ix.com and two others.

There is at least partial name server overlap between schoolrubric.org and other domains — willowlayland.com, triplusservicesinc.net, alexschimisrestaurant.com and two more among them.

The name servers becky.ns.cloudflare.com, elinore.ns.cloudflare.com and harley.ns.cloudflare.com are often found in combination with these name servers.

Host names with 6 IP numbers:

howard.ns.cloudflare.com carries IP addresses 108.162.195.171, 162.159.44.171 and 172.64.35.171, with 3 other addresses beyond those.

rihana.ns.cloudflare.com carries IP addresses 108.162.192.244, 172.64.32.244 and 173.245.58.244, with 3 other addresses beyond those.

Mail Servers

schoolrubric.org has five mail servers, which are aspmx.l.google.com, alt1.aspmx.l.google.com, alt2.aspmx.l.google.com and two others.

schoolrubric.org shares mail servers — at least in part — with other domains, including cllearview.com, greygarage.com, forgepdx.com and two others.

These mail servers are frequently used alongside mail servers alt3.aspmx.l.google.com, alt4.aspmx.l.google.com, aspmx3.googlemail.com and 3 other.

Host names with two IP numbers:

aspmx.l.google.com maps to two IP addresses — 142.251.163.27 and 2607:f8b0:4004:c2d::1b.

alt1.aspmx.l.google.com maps to two IP addresses — 108.177.123.26 and 2800:3f0:4003:c0f::1b.

alt2.aspmx.l.google.com maps to two IP addresses — 74.125.193.27 and 2a00:1450:400b:c01::1b.

alt3.aspmx.l.google.com maps to two IP addresses — 192.178.223.27 and 2a00:1450:4009:c0f::1b.

alt4.aspmx.l.google.com maps to two IP addresses — 172.253.157.26 and 2a00:1450:400c:c23::1a.