21gbook.com - robtex.com

21gbook.com

DNSSEC⚠️ Not signed
A156.254.248.216🇭🇰 HKIDC-AS-AP156.254.192.0/18 ABC
NSa4.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
NSb4.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=1770751290

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=1771291435
WOT: SAFE (61/100)

DNS History

13 records (5 active, 8 former)

20162017201820192020202120222023202420252026NSa.share-dns.coma4.share-dns.comb.share-dns.netb4.share-dns.netns1.parkingcrew.netns11.xincache.comns12.xincache.comns2.parkingcrew.netMXmail.h-email.netnewmail-g1.xinnetdns.comA156.254.248.216173.201.142.91185.53.179.6
●NSa.share-dns.com2026-03-07 → 2026-03-07 · 3 obs
○ 2018-01-04 05:45:52
● 2026-03-07 22:32:26
● 2026-03-07 22:32:28
●NSa4.share-dns.com2026-03-07 → 2026-03-07 · 3 obs
○ 2018-01-04 05:45:52
● 2026-03-07 22:32:26
● 2026-03-07 22:32:28
●NSb.share-dns.net2026-03-07 → 2026-03-07 · 3 obs
○ 2018-01-04 05:45:52
● 2026-03-07 22:32:26
● 2026-03-07 22:32:28
●NSb4.share-dns.net2026-03-07 → 2026-03-07 · 3 obs
○ 2018-01-04 05:45:52
● 2026-03-07 22:32:26
● 2026-03-07 22:32:28
○NSns1.parkingcrew.net2018-01-04 → 2018-01-04 · 4 obs
○ 2016-04-08 17:26:02
● 2018-01-04 05:45:52
○ 2026-03-07 22:32:26
○ 2026-03-07 22:32:28
○NSns11.xincache.com2015-05-15 → 2016-04-08 · 4 obs
● 2015-05-15 10:24:14
● 2016-04-08 17:26:02
○ 2018-01-04 05:45:52
○ 2026-03-07 22:32:28
○NSns12.xincache.com2015-10-12 → 2016-04-08 · 5 obs
○ 2015-05-15 10:24:14
● 2015-10-12 10:48:48
● 2016-04-08 17:26:02
○ 2018-01-04 05:45:52
○ 2026-03-07 22:32:28
○NSns2.parkingcrew.net2018-01-04 → 2018-01-04 · 4 obs
○ 2016-04-08 17:26:02
● 2018-01-04 05:45:52
○ 2026-03-07 22:32:26
○ 2026-03-07 22:32:28
○MXmail.h-email.net2018-01-04 → 2018-01-04 · 4 obs
○ 2016-04-08 17:26:02
● 2018-01-04 05:45:52
○ 2026-03-07 22:32:26
○ 2026-03-07 22:32:28
○MXnewmail-g1.xinnetdns.com2015-10-12 → 2016-04-08 · 4 obs
● 2015-10-12 10:48:48
● 2016-04-08 17:26:02
○ 2018-01-04 05:45:52
○ 2026-03-07 22:32:28
●A156.254.248.2162026-03-07 → 2026-03-07 · 3 obs
○ 2018-01-04 05:45:52
● 2026-03-07 22:32:26
● 2026-03-07 22:32:28
○A173.201.142.912015-05-15 → 2016-04-08 · 4 obs
● 2015-05-15 10:24:14
● 2016-04-08 17:26:02
○ 2018-01-04 05:45:52
○ 2026-03-07 22:32:28
○A185.53.179.62018-01-04 → 2018-01-04 · 4 obs
○ 2016-04-08 17:26:02
● 2018-01-04 05:45:52
○ 2026-03-07 22:32:26
○ 2026-03-07 22:32:28

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
coma.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...-
21gbook.comb4.share-dns.net, a4.share-dns.com1 record

✅ Authoritative Response

Server: 172.64.53.25

NS records: b4.share-dns.net, a4.share-dns.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for 21gbook.com (unsigned zone)

⏱️ Timing

Total: 129ms | Queries: -

📄 Records

TypeCountSample Data
A1156.254.248.216
NS2a.share-dns.com, b.share-dns.net
SOA1a.share-dns.com master.share-dns.com

📌 Glue Records Collected

Total: 1

Out-of-bailiwick: 1 (a4.share-dns.com)

Analysis

IP Addresses

21gbook.com points to a single IP number: 156.254.248.216.

Other host names, for instance gxsrmy.com, share IP numbers with 21gbook.com.

Name Servers

21gbook.com is delegated to four name servers: a4.share-dns.com, a.share-dns.com, b4.share-dns.net and b.share-dns.net.

21gbook.com at least partially shares name servers with other domains, for instance kh185.com, csbaojia.net, auxkord.com, ctfund.net and 30data.com.

These name servers are commonly used together with the name servers a5.share-dns.com, b5.share-dns.net, a10.share-dns.com, b10.share-dns.net, a9.share-dns.com, b9.share-dns.net, a6.share-dns.com, b6.share-dns.net, a1.share-dns.com and b1.share-dns.net.

Host names pointing to 172.64.53.25: a4.share-dns.com and a.share-dns.com.

Host names pointing to 172.64.52.239: b4.share-dns.net and b.share-dns.net.