mathlesson100.help - dns.ninja

`mathlesson100.help`

DNSSEC	⚠️ Not signed
A	2606:4700:3033::ac43:be3d^{🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3035::6815:13da^{🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.19.218^{Cloudflare104.21.16.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.190.61^{🇺🇸 Cloudflare172.67.176.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`decker.ns.cloudflare.com` ⭐
		A	2606:4700:58::a29f:2c9b^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`decker.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c39b^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`decker.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:239b^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`decker.ns.cloudflare.com`
		A	108.162.195.155^{🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`decker.ns.cloudflare.com`
		A	162.159.44.155^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`decker.ns.cloudflare.com`
		A	172.64.35.155^{🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`decker.ns.cloudflare.com`
NS	`elinore.ns.cloudflare.com`
		A	2606:4700:50::adf5:3a99^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`elinore.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c099^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`elinore.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2099^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`elinore.ns.cloudflare.com`
		A	108.162.192.153^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`elinore.ns.cloudflare.com`
		A	172.64.32.153^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`elinore.ns.cloudflare.com`
		A	173.245.58.153^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`elinore.ns.cloudflare.com`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.19.218, 172.67.190.61
		IPv6 hints	2606:4700:3033::ac43:be3d, 2606:4700:3035::6815:13da
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=204, name=cloudflare-ech.com
SOA	`decker.ns.cloudflare.com`dns@cloudflare.com serial=2411829674

`help`

	DNSSEC	🔒 Signed (DS record present)
	NS	`ns0.centralnic.net` ⭐
	NS	`a.nic.help`
	NS	`b.nic.help`
	NS	`c.nic.help`
	NS	`d.nic.help`
	SOA	`ns0.centralnic.net`hostmaster@centralnic.net serial=1786449223

⚠️ On DNS blocklist: spam-tlds

Same first word

mathlesson100.help

DNS History

7 records (6 active, 1 former)

●NSdecker.ns.cloudflare.com2026-06-11 → 2026-08-11 · 2 obs

● 2026-06-11 21:54:46
● 2026-08-11 11:57:16

●NSelinore.ns.cloudflare.com2026-06-11 → 2026-08-11 · 2 obs

● 2026-06-11 21:54:46
● 2026-08-11 11:57:16

●A104.21.19.2182026-06-11 → 2026-08-11 · 2 obs

● 2026-06-11 21:54:46
● 2026-08-11 11:57:16

●A172.67.190.612026-06-11 → 2026-08-11 · 2 obs

● 2026-06-11 21:54:46
● 2026-08-11 11:57:16

●A2606:4700:3033::ac43:be3d2026-06-11 → 2026-08-11 · 2 obs

● 2026-06-11 21:54:46
● 2026-08-11 11:57:16

●A2606:4700:3035::6815:13da2026-07-17 → 2026-08-11 · 3 obs

○ 2026-06-11 21:54:46
● 2026-07-17 03:31:44
● 2026-08-11 11:57:16

○A2606:4700:3036::6815:13da2026-06-11 → 2026-06-11 · 3 obs

● 2026-06-11 21:54:46
○ 2026-07-17 03:31:44
○ 2026-08-11 11:57:16

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
help	a.nic.help, b.nic.help, c.nic.help, d.nic.help	8 records
mathlesson100.help	elinore.ns.cloudflare.com, decker.ns.cloudflare.com	-

✅ Authoritative Response

Server:173.245.58.153

NS records: elinore.ns.cloudflare.com, decker.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for mathlesson100.help (unsigned zone)

⏱️ Timing

Total: 266ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.67.190.61, 104.21.19.218`
AAAA	2	`2606:4700:3035::6815:13da, 2606:4700:3033::ac43:be3d`
NS	2	`decker.ns.cloudflare.com, elinore.ns.cloudflare.com`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`decker.ns.cloudflare.com dns.cloudflare.`

📌 Glue Records Collected

Total: 8

In-bailiwick: 8 (a.nic.help, a.nic.help, b.nic.help...)

Analysis

IP Addresses

mathlesson100.help resolves to four IP addresses: 104.21.19.218, 172.67.190.61, 2606:4700:3033::ac43:be3d and 2606:4700:3035::6815:13da.

Among the host names that share IP numbers with mathlesson100.help are huangjinyidai.cn, firstserviceplus.com, www.paralegaloccupation.com and two others.

Name Servers

mathlesson100.help uses two name servers for its delegation: decker.ns.cloudflare.com and elinore.ns.cloudflare.com.

mathlesson100.help has the same name server delegation as a number of other domains, such as yowe.net, mathlesson90.help, mathlesson80.help and two more.

mathlesson100.help shares at least some of its name servers with other domains, including pafibolaangmongondowutarakab.org, klikme88-bosku.com, miamivalleyhearingandbalance.com and two others.

These name servers are frequently seen alongside the name servers julio.ns.cloudflare.com, malavika.ns.cloudflare.com, nicole.ns.cloudflare.com and terin.ns.cloudflare.com.

Host names resolving to 6 IP numbers:

Hostname decker.ns.cloudflare.com directs to 108.162.195.155, 162.159.44.155 and 172.64.35.155 along with 3 other IP addresses.

Hostname elinore.ns.cloudflare.com directs to 108.162.192.153, 172.64.32.153 and 173.245.58.153 along with 3 other IP addresses.