mathlesson20.help - dns.ninja

mathlesson20.help

DNSSEC⚠️ Not signed
A2606:4700:3035::6815:184a🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3036::ac43:d9c6🇺🇸 Cloudflare2606:4700:3036::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.24.74Cloudflare104.21.16.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.217.198🇺🇸 Cloudflare172.67.208.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSdecker.ns.cloudflare.com ⭐
A2606:4700:58::a29f:2c9b🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRdecker.ns.cloudflare.com
A2803:f800:50::6ca2:c39b🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRdecker.ns.cloudflare.com
A2a06:98c1:50::ac40:239b🇺🇸 Cloudflare2a06:98c1:50::/45
PTRdecker.ns.cloudflare.com
A108.162.195.155🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRdecker.ns.cloudflare.com
A162.159.44.155Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRdecker.ns.cloudflare.com
A172.64.35.155🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRdecker.ns.cloudflare.com
NSelinore.ns.cloudflare.com
A2606:4700:50::adf5:3a99🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRelinore.ns.cloudflare.com
A2803:f800:50::6ca2:c099🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRelinore.ns.cloudflare.com
A2a06:98c1:50::ac40:2099🇺🇸 Cloudflare2a06:98c1:50::/45
PTRelinore.ns.cloudflare.com
A108.162.192.153🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRelinore.ns.cloudflare.com
A172.64.32.153🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRelinore.ns.cloudflare.com
A173.245.58.153🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRelinore.ns.cloudflare.com
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.24.74, 172.67.217.198
IPv6 hints2606:4700:3035::6815:184a, 2606:4700:3036::ac43:d9c6
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=230, name=cloudflare-ech.com
SOAdecker.ns.cloudflare.comdns@cloudflare.com serial=2411807143

help

DNSSEC🔒 Signed (DS record present)
NSns0.centralnic.net ⭐
NSa.nic.help
NSb.nic.help
NSc.nic.help
NSd.nic.help
SOAns0.centralnic.nethostmaster@centralnic.net serial=1786442879
⚠️ On DNS blocklist: spam-tlds

Same first word

mathlesson20.help

DNS History

12 records (6 active, 6 former)

NSdecker.ns.cloudflare.comelinore.ns.cloudflare.comA104.21.24.74172.67.217.1982606:4700:3035::6815:184a2606:4700:3036::ac43:d9c6188.114.96.0188.114.97.02606:4700:3031::6815:184a2606:4700:3035::ac43:d9c62a06:98c1:3120::2a06:98c1:3121::
●NSdecker.ns.cloudflare.com2026-06-11 → 2026-08-11 · 2 obs
● 2026-06-11 21:46:02
● 2026-08-11 10:48:36
●NSelinore.ns.cloudflare.com2026-06-11 → 2026-08-11 · 2 obs
● 2026-06-11 21:46:02
● 2026-08-11 10:48:36
●A104.21.24.742026-06-11 → 2026-08-11 · 4 obs
● 2026-06-11 21:46:02
○ 2026-06-20 17:56:24
● 2026-07-16 05:28:22
● 2026-08-11 10:48:36
●A172.67.217.1982026-06-11 → 2026-08-11 · 4 obs
● 2026-06-11 21:46:02
○ 2026-06-20 17:56:24
● 2026-07-16 05:28:22
● 2026-08-11 10:48:36
○A188.114.96.02026-06-20 → 2026-06-20 · 4 obs
○ 2026-06-11 21:46:02
● 2026-06-20 17:56:24
○ 2026-07-16 05:28:22
○ 2026-08-11 10:48:36
○A188.114.97.02026-06-20 → 2026-06-20 · 4 obs
○ 2026-06-11 21:46:02
● 2026-06-20 17:56:24
○ 2026-07-16 05:28:22
○ 2026-08-11 10:48:36
○A2606:4700:3031::6815:184a2026-06-11 → 2026-06-11 · 3 obs
● 2026-06-11 21:46:02
○ 2026-06-20 17:56:24
○ 2026-08-11 10:48:36
●A2606:4700:3035::6815:184a2026-07-16 → 2026-08-11 · 3 obs
○ 2026-06-20 17:56:24
● 2026-07-16 05:28:22
● 2026-08-11 10:48:36
○A2606:4700:3035::ac43:d9c62026-06-11 → 2026-06-11 · 3 obs
● 2026-06-11 21:46:02
○ 2026-06-20 17:56:24
○ 2026-08-11 10:48:36
●A2606:4700:3036::ac43:d9c62026-07-16 → 2026-08-11 · 3 obs
○ 2026-06-20 17:56:24
● 2026-07-16 05:28:22
● 2026-08-11 10:48:36
○A2a06:98c1:3120::2026-06-20 → 2026-06-20 · 4 obs
○ 2026-06-11 21:46:02
● 2026-06-20 17:56:24
○ 2026-07-16 05:28:22
○ 2026-08-11 10:48:36
○A2a06:98c1:3121::2026-06-20 → 2026-06-20 · 4 obs
○ 2026-06-11 21:46:02
● 2026-06-20 17:56:24
○ 2026-07-16 05:28:22
○ 2026-08-11 10:48:36

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
helpa.nic.help, b.nic.help, c.nic.help, d.nic.help8 records
mathlesson20.helpdecker.ns.cloudflare.com, elinore.ns.cloudflare.com-

✅ Authoritative Response

Server:173.245.58.153

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for mathlesson20.help (unsigned zone)

⏱️ Timing

Total: 420ms | Queries: -

📄 Records

TypeCountSample Data
A2104.21.24.74, 172.67.217.198
AAAA22606:4700:3035::6815:184a, 2606:4700:3036::ac43:d9c6
NS2decker.ns.cloudflare.com, elinore.ns.cloudflare.com
HTTPS1{"priority":1,"target":".","alpn":["h3",
SOA1decker.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

mathlesson20.help resolves to four IP addresses: 104.21.24.74, 172.67.217.198, 2606:4700:3035::6815:184a and 2606:4700:3036::ac43:d9c6.

gwecorp.com, indexbox.co.uk, ordiniavvocati.it plus two other host names have IP numbers in common with mathlesson20.help.

Name Servers

mathlesson20.help is delegated to two name servers: decker.ns.cloudflare.com and elinore.ns.cloudflare.com.

The name server configuration of mathlesson20.help is shared with other domains, for instance mathlesson90.help, mathlesson80.help, mathlesson100.help and two others.

mathlesson20.help partially shares its NS delegation with several other domains, including com-ocean-net.pro, immonano.be, 23chealthcare.com and two others.

These name servers are regularly seen alongside julio.ns.cloudflare.com and terin.ns.cloudflare.com as name servers.

Hosts with 6 IP addresses each:

decker.ns.cloudflare.com resolves to 108.162.195.155, 162.159.44.155, 172.64.35.155 and 3 other IP addresses.

elinore.ns.cloudflare.com resolves to 108.162.192.153, 172.64.32.153, 173.245.58.153 and 3 other IP addresses.