mathlesson20.help - robtex.com

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=53, name=cloudflare-ech.com
SOAdecker.ns.cloudflare.comdns@cloudflare.com serial=2406800554

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=1784179056

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 → 2026-07-16 · 2 obs
● 2026-06-11 21:46:02
● 2026-07-16 05:28:22
●NSelinore.ns.cloudflare.com2026-06-11 → 2026-07-16 · 2 obs
● 2026-06-11 21:46:02
● 2026-07-16 05:28:22
●A104.21.24.742026-06-11 → 2026-07-16 · 3 obs
● 2026-06-11 21:46:02
○ 2026-06-20 17:56:24
● 2026-07-16 05:28:22
●A172.67.217.1982026-06-11 → 2026-07-16 · 3 obs
● 2026-06-11 21:46:02
○ 2026-06-20 17:56:24
● 2026-07-16 05:28:22
○A188.114.96.02026-06-20 → 2026-06-20 · 3 obs
○ 2026-06-11 21:46:02
● 2026-06-20 17:56:24
○ 2026-07-16 05:28:22
○A188.114.97.02026-06-20 → 2026-06-20 · 3 obs
○ 2026-06-11 21:46:02
● 2026-06-20 17:56:24
○ 2026-07-16 05:28:22
○A2606:4700:3031::6815:184a2026-06-11 → 2026-06-11 · 3 obs
● 2026-06-11 21:46:02
○ 2026-06-20 17:56:24
○ 2026-07-16 05:28:22
●A2606:4700:3035::6815:184a2026-07-16 → 2026-07-16 · 2 obs
○ 2026-06-20 17:56:24
● 2026-07-16 05:28:22
○A2606:4700:3035::ac43:d9c62026-06-11 → 2026-06-11 · 3 obs
● 2026-06-11 21:46:02
○ 2026-06-20 17:56:24
○ 2026-07-16 05:28:22
●A2606:4700:3036::ac43:d9c62026-07-16 → 2026-07-16 · 2 obs
○ 2026-06-20 17:56:24
● 2026-07-16 05:28:22
○A2a06:98c1:3120::2026-06-20 → 2026-06-20 · 3 obs
○ 2026-06-11 21:46:02
● 2026-06-20 17:56:24
○ 2026-07-16 05:28:22
○A2a06:98c1:3121::2026-06-20 → 2026-06-20 · 3 obs
○ 2026-06-11 21:46:02
● 2026-06-20 17:56:24
○ 2026-07-16 05:28:22

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
helpd.nic.help, c.nic.help, a.nic.help, b.nic.help8 records
mathlesson20.helpelinore.ns.cloudflare.com, decker.ns.cloudflare.com-

✅ Authoritative Response

Server:172.64.32.153

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for mathlesson20.help (unsigned zone)

⏱️ Timing

Total: 1171ms | 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, b.nic.help, c.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.

Two other host names, along with gwecorp.com, indexbox.co.uk and ordiniavvocati.it, also share IP numbers with mathlesson20.help.

Name Servers

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

mathlesson20.help shares its NS records with other domains, for example mathlesson90.help, mathlesson80.help, mathlesson100.help and two others.

mathlesson20.help has at least partial name server overlap with other domains, such as com-ocean-net.pro, immonano.be, 23chealthcare.com and two others.

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

DNS names with 6 IP addresses:

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.