21hd.cn - robtex.com

21hd.cn

DNSSEC⚠️ Not signed
A38.174.235.177🇺🇸 AS39882338.174.224.0/19 PEG TECH INC
NSa6.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
PTRip-172-64-53-25.defastlink.net
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
PTRip-172-64-53-25.defastlink.net
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
PTRip-172-64-52-239.defastlink.net
NSb6.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
PTRip-172-64-52-239.defastlink.net
SOAa.share-dns.commaster@share-dns.com serial=1758177544

cn

DNSSEC⚠️ Not signed
NSa.dns.cn ⭐ 🔒
NSb.dns.cn
NSc.dns.cn 🔒
NSd.dns.cn 🔒
NSe.dns.cn 🔒
NSns.cernet.net ⚠️ Not in parent delegation
SOAa.dns.cnroot@cnnic.cn serial=2034456417

Same first word

21hd.net
21hd.com
21hd.cn

Similar names

21dh.com
hd12.net
dh21.ru
21dh.cn
hd21.cn
dh12.ru
dh12.com
hd21.de
2hd1.com
12dh.com
2h1d.com
hd21.club
hd12.fr
d2h1.com
dh21.com
dh21.cn
h1d2.com
hd21.com
12hd.cn
dh21.de
h2d1.com
hd21.net
hd12.com
h1d2.com.cn
12hd.com
d1h2.de

DNS History

14 records (5 active, 9 former)

20162017201820192020202120222023202420252026NSa.share-dns.coma6.share-dns.comb.share-dns.netb6.share-dns.net21hd.cng1ns1.8jdns.netg1ns2.8jdns.netns1.dns002.comns2.dns002.comns3.dns002.comMXmail.51jb.comA38.174.235.177122.224.103.21761.153.111.38
○NS21hd.cn2015-06-21 → 2016-01-24 · 4 obs
● 2015-06-21 08:24:30
● 2016-01-24 05:21:18
○ 2016-10-11 14:08:28
○ 2026-03-09 07:54:30
●NSa.share-dns.com2026-03-09 → 2026-03-09 · 2 obs
○ 2017-09-02 03:37:26
● 2026-03-09 07:54:30
●NSa6.share-dns.com2026-03-09 → 2026-03-09 · 2 obs
○ 2017-09-02 03:37:26
● 2026-03-09 07:54:30
●NSb.share-dns.net2026-03-09 → 2026-03-09 · 2 obs
○ 2017-09-02 03:37:26
● 2026-03-09 07:54:30
●NSb6.share-dns.net2026-03-09 → 2026-03-09 · 2 obs
○ 2017-09-02 03:37:26
● 2026-03-09 07:54:30
○NSg1ns1.8jdns.net2016-10-11 → 2017-09-02 · 4 obs
○ 2016-04-26 13:29:06
● 2016-10-11 14:08:28
● 2017-09-02 03:37:26
○ 2026-03-09 07:54:30
○NSg1ns2.8jdns.net2016-10-11 → 2017-09-02 · 4 obs
○ 2016-04-26 13:29:06
● 2016-10-11 14:08:28
● 2017-09-02 03:37:26
○ 2026-03-09 07:54:30
○NSns1.dns002.com2015-06-21 → 2016-04-26 · 4 obs
● 2015-06-21 08:24:30
● 2016-04-26 13:29:06
○ 2016-10-11 14:08:28
○ 2026-03-09 07:54:30
○NSns2.dns002.com2015-06-21 → 2016-04-26 · 4 obs
● 2015-06-21 08:24:30
● 2016-04-26 13:29:06
○ 2016-10-11 14:08:28
○ 2026-03-09 07:54:30
○NSns3.dns002.com2015-06-21 → 2016-04-26 · 4 obs
● 2015-06-21 08:24:30
● 2016-04-26 13:29:06
○ 2016-10-11 14:08:28
○ 2026-03-09 07:54:30
○MXmail.51jb.com2015-06-21 → 2017-09-02 · 3 obs
● 2015-06-21 08:24:30
● 2017-09-02 03:37:26
○ 2026-03-09 07:54:30
○A122.224.103.2172015-06-21 → 2015-06-21 · 3 obs
● 2015-06-21 08:24:30
○ 2015-11-04 05:19:38
○ 2026-03-09 07:54:30
●A38.174.235.1772026-03-09 → 2026-03-09 · 2 obs
○ 2017-09-02 03:37:26
● 2026-03-09 07:54:30
○A61.153.111.382015-11-04 → 2017-09-02 · 4 obs
○ 2015-06-21 08:24:30
● 2015-11-04 05:19:38
● 2017-09-02 03:37:26
○ 2026-03-09 07:54:30

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
cna.dns.cn, b.dns.cn, c.dns.cn, d.dns.cn...-
21hd.cna6.share-dns.com, b6.share-dns.net-

✅ Authoritative Response

Server: 172.64.53.25

NS records: a6.share-dns.com, b6.share-dns.net

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for 21hd.cn (unsigned zone)

⏱️ Timing

Total: 1130ms | Queries: -

📄 Records

TypeCountSample Data
A138.174.235.177
NS2a.share-dns.com, b.share-dns.net
SOA1a.share-dns.com master.share-dns.com

Analysis

IP Addresses

21hd.cn resolves to a single IP: 38.174.235.177.

Other host names, for instance, yunyon.cn and martinlinking.cn share IP numbers with 21hd.cn.

Name Servers

21hd.cn is delegated to four name servers: a6.share-dns.com, a.share-dns.com, b6.share-dns.net and b.share-dns.net.

21hd.cn shares some name servers with other domains, for example hnhdxx.com, fabao114.com, zycczs.com, shicpack.com and yzhyjx.com.

these name servers are often used with a2.share-dns.com, b2.share-dns.net, a5.share-dns.com, b5.share-dns.net, a10.share-dns.com, b10.share-dns.net, a9.share-dns.com, b9.share-dns.net, a11.share-dns.com and b11.share-dns.net.

Host names with one IP:

a6.share-dns.com points to 172.64.53.25

a.share-dns.com points to 172.64.53.25

b6.share-dns.net points to 172.64.52.239

b.share-dns.net points to 172.64.52.239

Host names pointing to 172.64.53.25: a6.share-dns.com and a.share-dns.com

Host names pointing to 172.64.52.239: b6.share-dns.net and b.share-dns.net