21991s.com - robtex.com

21991s.com

DNSSEC⚠️ Not signed
A2606:4700:3033::ac43:a251🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3034::6815:3aae🇺🇸 Cloudflare2606:4700:3034::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.58.174Cloudflare104.21.48.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.162.81🇺🇸 Cloudflare172.67.160.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSdevin.ns.cloudflare.com ⭐
A2606:4700:58::a29f:2c31🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRdevin.ns.cloudflare.com
A2803:f800:50::6ca2:c331🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRdevin.ns.cloudflare.com
A2a06:98c1:50::ac40:2331🇺🇸 Cloudflare2a06:98c1:50::/45
PTRdevin.ns.cloudflare.com
A108.162.195.49🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRdevin.ns.cloudflare.com
A162.159.44.49Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRdevin.ns.cloudflare.com
A172.64.35.49🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRdevin.ns.cloudflare.com
NSmelissa.ns.cloudflare.com
A2606:4700:50::adf5:3ac7🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRmelissa.ns.cloudflare.com
A2803:f800:50::6ca2:c0c7🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRmelissa.ns.cloudflare.com
A2a06:98c1:50::ac40:20c7🇺🇸 Cloudflare2a06:98c1:50::/45
PTRmelissa.ns.cloudflare.com
A108.162.192.199🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRmelissa.ns.cloudflare.com
A172.64.32.199🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRmelissa.ns.cloudflare.com
A173.245.58.199🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRmelissa.ns.cloudflare.com
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.58.174, 172.67.162.81
IPv6 hints2606:4700:3033::ac43:a251, 2606:4700:3034::6815:3aae
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=234, name=cloudflare-ech.com
SOAdevin.ns.cloudflare.comdns@cloudflare.com serial=2409642931

com

DNSSEC🔒 Signed (DS record present)
NSa.gtld-servers.net ⭐
NSb.gtld-servers.net
NSc.gtld-servers.net
NSd.gtld-servers.net
NSe.gtld-servers.net
NSf.gtld-servers.net
NSg.gtld-servers.net
NSh.gtld-servers.net
NSi.gtld-servers.net
NSj.gtld-servers.net
NSk.gtld-servers.net
NSl.gtld-servers.net
NSm.gtld-servers.net
SOAa.gtld-servers.netnstld@verisign-grs.com serial=1785407932
⚠️ On DNS blocklist: tif

Same first word

21991s.com

DNS History

10 records (6 active, 4 former)

NSdevin.ns.cloudflare.commelissa.ns.cloudflare.comA104.21.58.174172.67.162.812606:4700:3033::ac43:a2512606:4700:3034::6815:3aae188.114.96.0188.114.97.02a06:98c1:3120::2a06:98c1:3121::
●NSdevin.ns.cloudflare.com2026-07-24 → 2026-07-30 · 2 obs
● 2026-07-24 19:30:52
● 2026-07-30 11:03:54
●NSmelissa.ns.cloudflare.com2026-07-24 → 2026-07-30 · 2 obs
● 2026-07-24 19:30:52
● 2026-07-30 11:03:54
●A104.21.58.1742026-07-30 → 2026-07-30 · 3 obs
○ 2026-07-24 19:30:52
● 2026-07-30 02:46:40
● 2026-07-30 11:03:54
●A172.67.162.812026-07-30 → 2026-07-30 · 3 obs
○ 2026-07-24 19:30:52
● 2026-07-30 02:46:40
● 2026-07-30 11:03:54
○A188.114.96.02026-07-24 → 2026-07-24 · 3 obs
● 2026-07-24 19:30:52
○ 2026-07-30 02:46:40
○ 2026-07-30 11:03:54
○A188.114.97.02026-07-24 → 2026-07-24 · 3 obs
● 2026-07-24 19:30:52
○ 2026-07-30 02:46:40
○ 2026-07-30 11:03:54
●A2606:4700:3033::ac43:a2512026-07-30 → 2026-07-30 · 3 obs
○ 2026-07-24 19:30:52
● 2026-07-30 02:46:40
● 2026-07-30 11:03:54
●A2606:4700:3034::6815:3aae2026-07-30 → 2026-07-30 · 3 obs
○ 2026-07-24 19:30:52
● 2026-07-30 02:46:40
● 2026-07-30 11:03:54
○A2a06:98c1:3120::2026-07-24 → 2026-07-24 · 3 obs
● 2026-07-24 19:30:52
○ 2026-07-30 02:46:40
○ 2026-07-30 11:03:54
○A2a06:98c1:3121::2026-07-24 → 2026-07-24 · 3 obs
● 2026-07-24 19:30:52
○ 2026-07-30 02:46:40
○ 2026-07-30 11:03:54

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
comi.gtld-servers.net, f.gtld-servers.net, k.gtld-servers.net, j.gtld-servers.net...-
21991s.commelissa.ns.cloudflare.com, devin.ns.cloudflare.com12 records

✅ Authoritative Response

Server:108.162.195.49

NS records: melissa.ns.cloudflare.com, devin.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for 21991s.com (unsigned zone)

⏱️ Timing

Total: 287ms | Queries: -

📄 Records

TypeCountSample Data
A2104.21.58.174, 172.67.162.81
AAAA22606:4700:3034::6815:3aae, 2606:4700:3033::ac43:a251
NS2devin.ns.cloudflare.com, melissa.ns.cloudflare.com
HTTPS1{"priority":1,"target":".","alpn":["h3",
SOA1devin.ns.cloudflare.com dns.cloudflare.c

📌 Glue Records Collected

Total: 12

Out-of-bailiwick: 12 (melissa.ns.cloudflare.com, melissa.ns.cloudflare.com, melissa.ns.cloudflare.com...)

Analysis

IP Addresses

21991s.com resolves to four IP addresses: 104.21.58.174, 172.67.162.81, 2606:4700:3033::ac43:a251 and 2606:4700:3034::6815:3aae.

makekowupuainvestments.click, yalabucha.ae, noventhorvia.com and two other host names share IP numbers with 21991s.com.

Name Servers

21991s.com has two authoritative name servers — devin.ns.cloudflare.com and melissa.ns.cloudflare.com.

21991s.com uses the same name servers as several other domains — among them hhxcy.com, 76599n.com, hamifgashim.com and two more.

21991s.com partially shares its NS delegation with several other domains, including 8247.co, writemyclassessay.com, miyoshi-silver.com and two others.

These name servers often co-occur with the name servers opal.ns.cloudflare.com.

Hostnames that resolve to 6 IP addresses:

devin.ns.cloudflare.com points to 108.162.195.49, 162.159.44.49, 172.64.35.49 and 3 other IP addresses.

melissa.ns.cloudflare.com points to 108.162.192.199, 172.64.32.199, 173.245.58.199 and 3 other IP addresses.