focusteach.com - robtex.com

focusteach.com

DNSSEC⚠️ Not signed
A221.6.35.120🇨🇳 CHINA169-Backbone221.6.0.0/16 CNC Group CHINA169 Jiangsu Province Network
NSns3.dnsv2.com ⭐
A2402:4e00:1470:2::12🇨🇳 TENCENT-NET-AP2402:4e00:1400::/40
A1.12.0.29🇨🇳 TENCENT-NET-AP-CN1.12.0.0/20 ZL-IDC-BOM
A1.13.76.55🇨🇳 TENCENT-NET-AP1.13.64.0/18
A111.13.203.55🇨🇳 CHINAMOBILE-CN111.13.0.0/16 CMI (Customer Route)
A117.135.128.155🇨🇳 CHINAMOBILE-CN117.135.128.0/24 CMI (Customer Route)
PTR(root)
A125.94.59.155🇨🇳 CHINANET-BACKBONE125.88.0.0/13 chinanet Guangdong network
A163.177.5.55🇨🇳 UNICOM-GuangZhou-IDC163.177.5.0/24
A220.196.136.55🇨🇳 UNICOM-SHFT-IDC220.196.136.0/24
NSns4.dnsv2.com
A2402:4e00:111:fff::f🇨🇳 TENCENT-NET-AP2402:4e00::/35
A1.12.0.30🇨🇳 TENCENT-NET-AP-CN1.12.0.0/20 ZL-IDC-BOM
A1.14.119.55🇨🇳 TENCENT-NET-AP1.14.64.0/18
A36.155.149.55🇨🇳 CMNET-Jiangsu-AP36.155.144.0/21 CMI (Customer Route)
A49.7.107.155🇨🇳 CHINA-149.7.64.0/18 China Telecom Beijing Co. Ltd.
A101.227.168.55🇨🇳 SHANGHAITELECOM101.227.168.0/23 SHIDC
A124.64.205.155🇨🇳 CHINA169-BJ124.64.205.0/24
MXmx1.focusteach.com ⭐
A221.6.35.101🇨🇳 CHINA169-Backbone221.6.0.0/16 CNC Group CHINA169 Jiangsu Province Network
PTRmx1.focuschina.com
MXmail13.made-in-china.com(15)
A222.190.108.198🇨🇳 CHINANET-BACKBONE222.184.0.0/13 for jiangsu province
PTRmail13.made-in-china.com
TXTv=spf1 a mx ip4:221.6.35.101 ip4:221.6.35.100 ip4:74.205.57.123 ip4:220.128.7...
TXTverify_2a4d339d6029babfe1249e7b7a9339f7
SOAns3.dnsv2.comlevel3dnsadmin@dnspod.com serial=1744357662

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

Subdomains

mx1.focusteach.com
all-cname.focusteach.com
jy.focusteach.com

Same first word

focusteach.com

DNS History

11 records (5 active, 6 former)

201820192020202120222023202420252026NSns3.dnsv2.comns4.dnsv2.comns4.made-in-china.comns5.made-in-china.comns6.made-in-china.comns9.made-in-china.comMXmail13.made-in-china.commx1.focusteach.commail3.made-in-china.comA221.6.35.12060.250.113.85
●NSns3.dnsv2.com2026-02-20 → 2026-03-12 · 3 obs
○ 2019-01-31 23:20:40
● 2026-02-20 02:02:14
● 2026-03-12 21:16:18
●NSns4.dnsv2.com2026-02-20 → 2026-03-12 · 3 obs
○ 2019-01-31 23:20:40
● 2026-02-20 02:02:14
● 2026-03-12 21:16:18
○NSns4.made-in-china.com2017-01-04 → 2019-01-31 · 4 obs
● 2017-01-04 19:40:48
● 2019-01-31 23:20:40
○ 2026-02-20 02:02:14
○ 2026-03-12 21:16:18
○NSns5.made-in-china.com2017-01-04 → 2019-01-31 · 4 obs
● 2017-01-04 19:40:48
● 2019-01-31 23:20:40
○ 2026-02-20 02:02:14
○ 2026-03-12 21:16:18
○NSns6.made-in-china.com2017-01-04 → 2019-01-31 · 4 obs
● 2017-01-04 19:40:48
● 2019-01-31 23:20:40
○ 2026-02-20 02:02:14
○ 2026-03-12 21:16:18
○NSns9.made-in-china.com2019-01-31 → 2019-01-31 · 4 obs
○ 2017-01-04 19:40:48
● 2019-01-31 23:20:40
○ 2026-02-20 02:02:14
○ 2026-03-12 21:16:18
●MXmail13.made-in-china.com2019-01-31 → 2026-03-12 · 3 obs
○ 2017-01-04 19:40:48
● 2019-01-31 23:20:40
● 2026-03-12 21:16:18
○MXmail3.made-in-china.com2017-01-04 → 2017-01-04 · 3 obs
● 2017-01-04 19:40:48
○ 2019-01-31 23:20:40
○ 2026-03-12 21:16:18
●MXmx1.focusteach.com2019-01-31 → 2026-03-12 · 3 obs
○ 2017-01-04 19:40:48
● 2019-01-31 23:20:40
● 2026-03-12 21:16:18
●A221.6.35.1202026-02-20 → 2026-03-12 · 3 obs
○ 2019-01-31 23:20:40
● 2026-02-20 02:02:14
● 2026-03-12 21:16:18
○A60.250.113.852017-01-04 → 2019-01-31 · 4 obs
● 2017-01-04 19:40:48
● 2019-01-31 23:20:40
○ 2026-02-20 02:02:14
○ 2026-03-12 21:16:18

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
coma.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...-
focusteach.comns3.dnsv2.com, ns4.dnsv2.com15 records

✅ Authoritative Response

Server: 1.12.0.30

NS records: ns3.dnsv2.com, ns4.dnsv2.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for focusteach.com (unsigned zone)

⏱️ Timing

Total: 344ms | Queries: -

📄 Records

TypeCountSample Data
A1221.6.35.120
NS2ns4.dnsv2.com, ns3.dnsv2.com
MX2mx1.focusteach.com (pri: 10), mail13.made-in-china.com (pri: 15)
TXT2verify_2a4d339d6029babfe1249e7b7a9339f7, v=spf1 a mx ip4:221.6.35.101 ip4:221.6.3
SOA1ns3.dnsv2.com level3dnsadmin.dnspod.com

📌 Glue Records Collected

Total: 15

Out-of-bailiwick: 15 (ns3.dnsv2.com, ns3.dnsv2.com, ns3.dnsv2.com...)

Analysis

Hierarchy

focusteach.com is a parent of mx1.focusteach.com, all-cname.focusteach.com and jy.focusteach.com.

IP Addresses

focusteach.com points to a single IP number: 221.6.35.120.

Other host names such as jskxedu.com and all-cname.focusteach.com share IP numbers with focusteach.com.

Name Servers

Delegation for focusteach.com rests with two name servers, ns3.dnsv2.com and ns4.dnsv2.com.

focusteach.com shares the same name server setup as other domains, including idspub.com, 8duhu.com, spapi.cn, justinclub.com and yuncdn.site.

focusteach.com at least partially shares name servers with other domains, for instance 98u.com, ancademy.org, wenwenxf.com, xgad.cn and ku7.com.

These name servers are commonly used with f1g1ns1.dnspod.net and f1g1ns2.dnspod.net.

Host names with eight IP numbers:

ns3.dnsv2.com points to: 2402:4e00:1470:2::12, 1.12.0.29, 1.13.76.55, 111.13.203.55, 117.135.128.155, 125.94.59.155, 163.177.5.55 and 220.196.136.55.

Host names with seven IP numbers:

ns4.dnsv2.com points to: 2402:4e00:111:fff::f, 1.12.0.30, 1.14.119.55, 36.155.149.55, 49.7.107.155, 101.227.168.55 and 124.64.205.155.

Mail Servers

focusteach.com is handled by two mail servers: mx1.focusteach.com and mail13.made-in-china.com.

focusteach.com shares mail servers with other domains at least in part, for instance 91xinbei.com, focusmonitor.com, meiawards.com, 3d-focus.com and trademessenger.com.

These mail servers are often used with mail3.made-in-china.com, mail.focuschina.com, mx1.focuschina.com and mx1.91xinbei.com.

Host names with one IP number: mx1.focusteach.com points to 221.6.35.101; mail13.made-in-china.com points to 222.190.108.198.