21k.cc - robtex.com

21k.cc

DNSSEC⚠️ Not signed
A104.143.36.105🇺🇸 HKCICL-AS-AP104.143.36.0/24 HONG KONG COMMUNICATIONS INTERNATIONAL CO.,LIMITED
NSa2.share-dns.com ⭐ ⚠️ Not in parent delegation
A172.64.53.25🇺🇸 Cloudflare172.64.53.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
NSa.share-dns.com ⚠️ Not in zone NS records
A172.64.53.25🇺🇸 Cloudflare172.64.53.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
NSb.share-dns.net ⚠️ Not in zone NS records
A172.64.52.239🇺🇸 Cloudflare172.64.52.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
NSb2.share-dns.net ⚠️ Not in parent delegation
A172.64.52.239🇺🇸 Cloudflare172.64.52.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
SOAa.share-dns.commaster@share-dns.com serial=1783642815

cc

DNSSEC🔒 Signed (DS record present)
NSac1.nstld.com ⭐
NSac2.nstld.com
NSac3.nstld.com
NSac4.nstld.com
SOAac1.nstld.cominfo@verisign-grs.com serial=1785653173
⚠️ On DNS blocklist: tif
⚠️ On DNS blocklist: spam-tlds

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DNS History

5 records (5 active, 0 former)

NSa.share-dns.coma2.share-dns.comb.share-dns.netb2.share-dns.netA104.143.36.105
●NSa.share-dns.com2026-07-25 → 2026-08-02 · 2 obs
● 2026-07-25 11:30:48
● 2026-08-02 07:00:38
●NSa2.share-dns.com2026-07-25 → 2026-08-02 · 2 obs
● 2026-07-25 11:30:48
● 2026-08-02 07:00:38
●NSb.share-dns.net2026-07-25 → 2026-08-02 · 2 obs
● 2026-07-25 11:30:48
● 2026-08-02 07:00:38
●NSb2.share-dns.net2026-07-25 → 2026-08-02 · 2 obs
● 2026-07-25 11:30:48
● 2026-08-02 07:00:38
●A104.143.36.1052026-07-25 → 2026-08-02 · 2 obs
● 2026-07-25 11:30:48
● 2026-08-02 07:00:38

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
ccac3.nstld.com, ac1.nstld.com, ac2.nstld.com, ac4.nstld.com8 records
21k.cca2.share-dns.com, b2.share-dns.net-

✅ Authoritative Response

Server:172.64.52.239

NS records: a2.share-dns.com, b2.share-dns.net

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for 21k.cc (unsigned zone)

⏱️ Timing

Total: 1038ms | Queries: -

📄 Records

TypeCountSample Data
A1104.143.36.105
NS2a.share-dns.com, b.share-dns.net
SOA1a.share-dns.com master.share-dns.com

📌 Glue Records Collected

Total: 8

Out-of-bailiwick: 8 (ac4.nstld.com, ac3.nstld.com, ac2.nstld.com...)

Analysis

IP Addresses

21k.cc resolves to one IP address: 104.143.36.105.

Name Servers

The authoritative name servers for 21k.cc are a2.share-dns.com, a.share-dns.com, b2.share-dns.net and b.share-dns.net.

21k.cc has at least partial name server overlap with other domains, such as triplevent.com, zhengxin-eap.com, ljsjy.com and two others.

a11.share-dns.com, b11.share-dns.net and a10.share-dns.com — plus 7 other name servers — are commonly paired with these name servers.

Four host names each point to one IP address: a2.share-dns.com and a.share-dns.com both point to 172.64.53.25, and b2.share-dns.net and b.share-dns.net both point to 172.64.52.239.

The host names a2.share-dns.com and a.share-dns.com both resolve to 172.64.53.25 IP addresses.

The host names b2.share-dns.net and b.share-dns.net both resolve to 172.64.52.239 IP addresses.