hotcourse.com - robtex.com
hotcourse.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 103.218.240.184🇭🇰 UCLOUD-1103.218.240.0/24 UCLOUD INFORMATION TECHNOLOGY (HK) LIMITED FLAT/RM 603 6/F LAWS COMMERCIAL PLAZA 788 CHEUNG SHA WAN ROAD, KL, | ||||||
| A | 118.193.33.220🇭🇰 UCLOUD-1118.193.33.0/24 UCLOUD INFORMATION TECHNOLOGY (HK) LIMITED FLAT/RM 603 6/F LAWS COMMERCIAL PLAZA 788 CHEUNG SHA WAN ROAD, KL, | ||||||
| A | 118.193.37.94🇭🇰 UCLOUD-1118.193.37.0/24 UCLOUD INFORMATION TECHNOLOGY (HK) LIMITED FLAT/RM 603 6/F LAWS COMMERCIAL PLAZA 788 CHEUNG SHA WAN ROAD, KL, | ||||||
| A | 152.32.171.65🇭🇰 UCLOUD-1152.32.171.0/24 UCLOUD INFORMATION TECHNOLOGY (HK) LIMITED FLAT/RM 603 6/F LAWS COMMERCIAL PLAZA 788 CHEUNG SHA WAN ROAD, KL, | ||||||
| A | 154.85.60.150🇺🇸 BAIDU-1154.85.56.0/21 AS55967 | ||||||
| NS | pk3.22.cn ⚠️ Not in zone NS records | ||||||
| A | 39.101.68.48🇨🇳 Alibaba-Cloud39.100.0.0/14 CT BeiJing IDC | ||||||
| NS | pk4.22.cn ⚠️ Not in zone NS records | ||||||
| A | 39.101.68.48🇨🇳 Alibaba-Cloud39.100.0.0/14 CT BeiJing IDC | ||||||
com
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a.gtld-servers.net ⭐ | ||||||
| NS | b.gtld-servers.net | ||||||
| NS | c.gtld-servers.net | ||||||
| NS | d.gtld-servers.net | ||||||
| NS | e.gtld-servers.net | ||||||
| NS | f.gtld-servers.net | ||||||
| NS | g.gtld-servers.net | ||||||
| NS | h.gtld-servers.net | ||||||
| NS | i.gtld-servers.net | ||||||
| NS | j.gtld-servers.net | ||||||
| NS | k.gtld-servers.net | ||||||
| NS | l.gtld-servers.net | ||||||
| NS | m.gtld-servers.net | ||||||
| SOA | a.gtld-servers.netnstld@verisign-grs.com serial=1774567867 | ||||||
Same first word
hotcourse.com |
Similar names
DNS History
12 records (7 active, 5 former)
○NSns1.sedoparking.com2015-07-26 → 2017-05-19 · 4 obs
● 2017-05-19 11:36:12
○ 2026-03-06 07:43:54
○ 2026-03-27 00:01:32
○NSns2.sedoparking.com2015-07-26 → 2017-05-19 · 4 obs
● 2017-05-19 11:36:12
○ 2026-03-06 07:43:54
○ 2026-03-27 00:01:32
●NSpk3.22.cn2026-03-06 → 2026-03-27 · 3 obs
● 2026-03-06 07:43:54
● 2026-03-27 00:01:32
●NSpk4.22.cn2026-03-06 → 2026-03-27 · 3 obs
● 2026-03-06 07:43:54
● 2026-03-27 00:01:32
○MXlocalhost2017-05-19 → 2017-05-19 · 4 obs
● 2017-05-19 11:36:12
○ 2026-03-06 07:43:54
○ 2026-03-27 00:01:32
○MXmail.nickstel.com2015-07-26 → 2016-07-06 · 4 obs
● 2016-07-06 06:15:24
○ 2017-05-19 11:36:12
○ 2026-03-27 00:01:32
●A103.218.240.1842026-03-27 → 2026-03-27 · 2 obs
● 2026-03-27 00:01:32
●A118.193.33.2202026-03-27 → 2026-03-27 · 2 obs
● 2026-03-27 00:01:32
●A118.193.37.942026-03-27 → 2026-03-27 · 2 obs
● 2026-03-27 00:01:32
●A152.32.171.652026-03-27 → 2026-03-27 · 2 obs
● 2026-03-27 00:01:32
●A154.85.60.1502026-03-27 → 2026-03-27 · 2 obs
● 2026-03-27 00:01:32
○A72.52.4.1202015-07-26 → 2017-05-19 · 4 obs
● 2017-05-19 11:36:12
○ 2026-03-06 07:43:54
○ 2026-03-27 00:01:32
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | l.gtld-servers.net, j.gtld-servers.net, h.gtld-servers.net, d.gtld-servers.net... | - |
| hotcourse.com | pk3.22.cn, pk4.22.cn | - |
✅ Authoritative Response
Server:39.101.68.48
NS records: pk3.22.cn, pk4.22.cn
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for hotcourse.com (unsigned zone)
⏱️ Timing
Total: 1431ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 5 | 154.85.60.150, 118.193.33.220... |
Analysis
IP Addresses
hotcourse.com points to five IPs: 103.218.240.184, 118.193.33.220, 118.193.37.94, 152.32.171.65 and 154.85.60.150.
Other host names, for instance sensor2.suitesmart.com, www.cangtai.com, 9813.com.cn, mdtec.cn and optec.com.cn share IP numbers with hotcourse.com.
Name Servers
Delegation for hotcourse.com rests with two name servers, pk3.22.cn and pk4.22.cn.
hotcourse.com shares the same name server setup as other domains, including chuangkai.cn, dieta.cn, spsb.com, enta.cn and tmfb.cn.
Host names sharing a single IP:
pk3.22.cn points to 39.101.68.48
pk4.22.cn points to 39.101.68.48
Host names that point to 39.101.68.48: pk3.22.cn and pk4.22.cn