do21.cn - robtex.com

do21.cn

DNSSEC⚠️ Not signed
A156.252.63.203🇺🇸 GNET-AS9294156.252.63.0/24
NSa5.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
NSb5.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=1767159171

cn

DNSSEC🔒 Signed (DS record present)
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=2034777215

Same first word

do21.cn
do21.net
do21.tv
do21.ch
do21.ru
do21.ws
do21.com

Similar names

12do.com
12do.app
12do.info
od21.com
21do.net
12do.nl
1do2.com

DNS History

19 records (5 active, 14 former)

20162017201820192020202120222023202420252026NSa.share-dns.coma5.share-dns.comb.share-dns.netb5.share-dns.netns1.myhostadmin.netns2.myhostadmin.netns3.myhostadmin.netns4.myhostadmin.netns5.myhostadmin.netns6.myhostadmin.netA156.252.63.203118.123.13.51125.88.190.20125.88.190.25125.88.190.31222.73.144.18061.160.224.230CNAMEaee21a345838835ffe0d7691b37c1a0b.dnspao.coms-50150.gotocdn.com
●NSa.share-dns.com2026-05-06 → 2026-05-11 · 3 obs
○ 2016-12-30 15:16:48
● 2026-05-06 04:13:04
● 2026-05-11 04:58:38
●NSa5.share-dns.com2026-05-06 → 2026-05-11 · 3 obs
○ 2016-12-30 15:16:48
● 2026-05-06 04:13:04
● 2026-05-11 04:58:38
●NSb.share-dns.net2026-05-06 → 2026-05-11 · 3 obs
○ 2016-12-30 15:16:48
● 2026-05-06 04:13:04
● 2026-05-11 04:58:38
●NSb5.share-dns.net2026-05-06 → 2026-05-11 · 3 obs
○ 2016-12-30 15:16:48
● 2026-05-06 04:13:04
● 2026-05-11 04:58:38
○NSns1.myhostadmin.net2015-06-28 → 2016-12-30 · 4 obs
● 2015-06-28 03:35:48
● 2016-12-30 15:16:48
○ 2026-05-06 04:13:04
○ 2026-05-11 04:58:38
○NSns2.myhostadmin.net2015-06-28 → 2016-12-30 · 4 obs
● 2015-06-28 03:35:48
● 2016-12-30 15:16:48
○ 2026-05-06 04:13:04
○ 2026-05-11 04:58:38
○NSns3.myhostadmin.net2015-06-28 → 2016-12-30 · 4 obs
● 2015-06-28 03:35:48
● 2016-12-30 15:16:48
○ 2026-05-06 04:13:04
○ 2026-05-11 04:58:38
○NSns4.myhostadmin.net2015-06-28 → 2016-12-30 · 4 obs
● 2015-06-28 03:35:48
● 2016-12-30 15:16:48
○ 2026-05-06 04:13:04
○ 2026-05-11 04:58:38
○NSns5.myhostadmin.net2015-06-28 → 2016-12-30 · 4 obs
● 2015-06-28 03:35:48
● 2016-12-30 15:16:48
○ 2026-05-06 04:13:04
○ 2026-05-11 04:58:38
○NSns6.myhostadmin.net2015-06-28 → 2016-12-30 · 4 obs
● 2015-06-28 03:35:48
● 2016-12-30 15:16:48
○ 2026-05-06 04:13:04
○ 2026-05-11 04:58:38
○A118.123.13.512016-01-27 → 2016-12-30 · 8 obs
○ 2015-11-08 14:18:06
● 2016-01-27 23:16:58
● 2016-08-14 15:41:20
○ 2016-08-25 16:09:14
○ 2016-12-17 15:02:18
● 2016-12-30 15:16:48
○ 2026-05-06 04:13:04
○ 2026-05-11 04:58:38
○A125.88.190.202015-11-08 → 2015-11-08 · 4 obs
○ 2015-06-28 03:35:48
● 2015-11-08 14:18:06
○ 2016-01-27 23:16:58
○ 2026-05-11 04:58:38
○A125.88.190.252015-06-28 → 2015-06-28 · 3 obs
● 2015-06-28 03:35:48
○ 2026-05-06 04:13:04
○ 2026-05-11 04:58:38
○A125.88.190.312016-12-17 → 2016-12-17 · 4 obs
○ 2016-11-21 08:47:28
● 2016-12-17 15:02:18
○ 2016-12-30 15:16:48
○ 2026-05-11 04:58:38
●A156.252.63.2032026-05-06 → 2026-05-11 · 3 obs
○ 2016-12-30 15:16:48
● 2026-05-06 04:13:04
● 2026-05-11 04:58:38
○A222.73.144.1802016-09-07 → 2016-11-21 · 5 obs
○ 2016-08-25 16:09:14
● 2016-09-07 20:00:34
● 2016-11-21 08:47:28
○ 2016-12-17 15:02:18
○ 2026-05-11 04:58:38
○A61.160.224.2302016-08-25 → 2016-08-25 · 4 obs
○ 2016-08-14 15:41:20
● 2016-08-25 16:09:14
○ 2016-09-07 20:00:34
○ 2026-05-11 04:58:38
○CNAMEaee21a345838835ffe0d7691b37c1a0b.dnspao.com2015-11-08 → 2016-12-17 · 8 obs
○ 2015-06-28 03:35:48
● 2015-11-08 14:18:06
○ 2016-01-27 23:16:58
○ 2016-08-14 15:41:20
● 2016-08-25 16:09:14
● 2016-12-17 15:02:18
○ 2016-12-30 15:16:48
○ 2026-05-11 04:58:38
○CNAMEs-50150.gotocdn.com2015-06-28 → 2016-12-30 · 4 obs
● 2015-06-28 03:35:48
● 2016-12-30 15:16:48
○ 2026-05-06 04:13:04
○ 2026-05-11 04:58:38

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
cnb.dns.cn, d.dns.cn, e.dns.cn, a.dns.cn...-
do21.cna5.share-dns.com, b5.share-dns.net-

✅ Authoritative Response

Server:172.64.53.25

NS records: a5.share-dns.com, b5.share-dns.net

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for do21.cn (unsigned zone)

⏱️ Timing

Total: 3183ms | Queries: -

📄 Records

TypeCountSample Data
A1156.252.63.203
NS2a.share-dns.com, b.share-dns.net
SOA1a.share-dns.com master.share-dns.com

Analysis

IP Addresses

do21.cn points to a single IP address: 156.252.63.203.

Other host names such as jingshengcnc.com and www.jingshengcnc.com share IP numbers with do21.cn.

Name Servers

do21.cn is delegated to four name servers: a5.share-dns.com, a.share-dns.com, b5.share-dns.net and b.share-dns.net.

At least part of the name servers for do21.cn are shared with other domains, for instance 1rida.com, echallain.com, 8f59d99d75a6873c.com, nataliapetrosky.com and zhongqipx.com.

these name servers are commonly used with the name servers a6.share-dns.com, b6.share-dns.net, a3.share-dns.com, b3.share-dns.net, a7.share-dns.com, b7.share-dns.net, a4.share-dns.com, b4.share-dns.net, a10.share-dns.com and b10.share-dns.net.

Hostnames with one IP:

a5.share-dns.com points to 172.64.53.25

a.share-dns.com points to 172.64.53.25

b5.share-dns.net points to 172.64.52.239

b.share-dns.net points to 172.64.52.239

Hostnames that point to 172.64.53.25: a5.share-dns.com and a.share-dns.com

Hostnames that point to 172.64.52.239: b5.share-dns.net and b.share-dns.net