study211.com - robtex.com

🛡️Domain Reputation CheckBlocklist, phishing & malware status→

study211.com

DNSSEC⚠️ Not signed
A47.99.91.228🇨🇳 Alibaba-Cloud47.98.0.0/15 Hangzhou Alibaba Advertising Co.,Ltd.
NSdns7.hichina.com ⭐
A2408:4009:501::15🇨🇳 Alibaba-Cloud2408:4009:501::/48
A39.96.153.43🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC
A39.96.153.63🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC
A47.118.199.203🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd.
A47.118.199.213🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd.
A120.76.107.43🇨🇳 Alibaba-Cloud120.76.0.0/17
A120.76.107.63🇨🇳 Alibaba-Cloud120.76.0.0/17
A139.224.142.113🇨🇳 Alibaba-Cloud139.224.128.0/17 China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District,
A139.224.142.123🇨🇳 Alibaba-Cloud139.224.128.0/17 China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District,
NSdns8.hichina.com
A2408:4009:501::16🇨🇳 Alibaba-Cloud2408:4009:501::/48
A39.96.153.44🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC
A39.96.153.54🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC
A47.118.199.204🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd.
A47.118.199.214🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd.
A120.76.107.44🇨🇳 Alibaba-Cloud120.76.0.0/17
A120.76.107.54🇨🇳 Alibaba-Cloud120.76.0.0/17
A139.224.142.114🇨🇳 Alibaba-Cloud139.224.128.0/17 China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District,
A139.224.142.124🇨🇳 Alibaba-Cloud139.224.128.0/17 China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District,
SOAdns7.hichina.comhostmaster@hichina.com 2026-08-26 #16

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=1794538611

Same first word

study211.com
study211.workers.dev
study211.cn

Similar names

211study.com
study121.workers.dev
121study.com

Previous names

study1c.com
study1on1.com
study1sec.com
study1st.com
study1styear.com
study1styr.com
study1usa.com
study1v1.com
study2.com
study20.com
study2000.com
study2019.com
study2020-startup.com
study2020suv.com
study2021.com
study2025.com
study2026.com
study21.com
study2103104.com

Next names

study2112.com
study21cn.com
study22.com
study224.com
study23.com
study234.com
study239.com
study24.com
study247.com
study247exam.com
study247library.com
study24ai.com
study24h.com
study24hour.com
study24hours.com
study24hr.com
study24seven.com
study24x7.com
study24you.com
study27.com

DNS History

6 records (3 active, 3 former)

2017201820192020202120222023202420252026NSdns7.hichina.comdns8.hichina.comdns10.hichina.comdns9.hichina.comA47.99.91.228182.16.44.148
○NSdns10.hichina.com2016-12-17 → 2017-10-20 · 4 obs
● 2016-12-17 02:58:40
● 2017-10-20 00:46:20
○ 2026-10-19 07:01:52
○ 2026-11-13 03:39:14
●NSdns7.hichina.com2026-10-19 → 2026-11-13 · 3 obs
○ 2017-10-20 00:46:20
● 2026-10-19 07:01:52
● 2026-11-13 03:39:14
●NSdns8.hichina.com2026-10-19 → 2026-11-13 · 3 obs
○ 2017-10-20 00:46:20
● 2026-10-19 07:01:52
● 2026-11-13 03:39:14
○NSdns9.hichina.com2016-12-17 → 2017-10-20 · 4 obs
● 2016-12-17 02:58:40
● 2017-10-20 00:46:20
○ 2026-10-19 07:01:52
○ 2026-11-13 03:39:14
○A182.16.44.1482016-12-17 → 2017-10-20 · 4 obs
● 2016-12-17 02:58:40
● 2017-10-20 00:46:20
○ 2026-10-19 07:01:52
○ 2026-11-13 03:39:14
●A47.99.91.2282026-10-19 → 2026-11-13 · 5 obs
○ 2017-10-20 00:46:20
● 2026-10-19 07:01:52
○ 2026-10-21 09:16:28
● 2026-10-21 20:28:52
● 2026-11-13 03:39:14

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
comk.gtld-servers.net, j.gtld-servers.net, i.gtld-servers.net, l.gtld-servers.net...-
study211.comdns7.hichina.com, dns8.hichina.com18 records

✅ Authoritative Response

Server:120.76.107.43

NS records: dns7.hichina.com, dns8.hichina.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

Root DNSKEY fetch failed: Error: connect EADDRNOTAVAIL 198.41.0.4:53 - Local (0.0.0.0:0)

⏱️ Timing

Total: 3554ms | Queries: -

📄 Records

TypeCountSample Data
A147.99.91.228
NS2dns8.hichina.com, dns7.hichina.com
SOA1dns7.hichina.com hostmaster.hichina.com

📌 Glue Records Collected

Total: 18

Out-of-bailiwick: 18 (dns7.hichina.com, dns7.hichina.com, dns7.hichina.com...)

Analysis

IP Addresses

study211.com has exactly one IP address — 47.99.91.228.

Name Servers

DNS delegation for study211.com points to two name servers: dns7.hichina.com and dns8.hichina.com.

The name server configuration of study211.com is shared with other domains, for instance 1vyxk.shop, aiqitan.com, ulvaron.shop and two others.

The name servers of study211.com overlap at least partially with those of other domains — among them biliao.cc, 12305.org, zpbhy.com and two more.

These name servers commonly appear alongside the name servers expirens3.hichina.com and expirens4.hichina.com.

Hosts with 9 IP addresses each:

dns7.hichina.com has IP addresses 39.96.153.43, 39.96.153.63 and 47.118.199.203, plus 6 other.

dns8.hichina.com has IP addresses 39.96.153.44, 39.96.153.54 and 47.118.199.204, plus 6 other.