udemy.com.tw - robtex.com
udemy.com.tw
| DNSSEC | ⚠️ Not signed | ||||||
| A | 217.19.248.132🇬🇧 SAFENAMES-AS217.19.248.0/24 Safenames Datacentre | ||||||
| PTR | redirect.idp365.net | ||||||
| NS | dns1.idp365.net ⭐ | ||||||
| A | 2400:cb00:2049:1::a29f:1b83🇺🇸 Cloudflare2400:cb00:2049::/48 , Inc. 101 Townsend Street | ||||||
| A | 162.159.27.131Cloudflare162.159.27.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | dns1.idp365.net | ||||||
| NS | dns2.idp365.net | ||||||
| A | 2400:cb00:2049:1::a29f:3003🇺🇸 Cloudflare2400:cb00:2049::/48 , Inc. 101 Townsend Street | ||||||
| A | 162.159.48.3Cloudflare162.159.48.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | dns2.idp365.net | ||||||
| NS | dns3.idp365.net | ||||||
| A | 2400:cb00:2049:1::a29f:31fe🇺🇸 Cloudflare2400:cb00:2049::/48 , Inc. 101 Townsend Street | ||||||
| A | 162.159.49.254Cloudflare162.159.48.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | dns3.idp365.net | ||||||
| MX | mail.idp365.net ⭐ | ||||||
| A | 217.19.248.131🇬🇧 SAFENAMES-AS217.19.248.0/24 Safenames Datacentre | ||||||
| PTR | redirect1.safenames.com | ||||||
| SOA | dns1.idp365.nethostmaster@idp365.net 2015-05-27 #1 | ||||||
com.tw
| DNSSEC | ⚠️ Not signed | ||||||
| NS | a.twnic.net.tw ⭐ ⚠️ Not in parent delegation | ||||||
| NS | anytld.apnic.net ⚠️ Not in parent delegation | ||||||
| NS | b.twnic.net.tw ⚠️ Not in parent delegation | ||||||
| NS | c.twnic.net.tw ⚠️ Not in parent delegation | ||||||
| NS | d.twnic.net.tw ⚠️ Not in parent delegation | ||||||
| NS | e.twnic.net.tw ⚠️ Not in parent delegation | ||||||
| NS | f.twnic.net.tw ⚠️ Not in parent delegation | ||||||
| NS | g.twnic.net.tw ⚠️ Not in parent delegation | ||||||
| NS | h.dns.tw ⚠️ Not in parent delegation | ||||||
| NS | h.twnic.net.tw ⚠️ Not in parent delegation | ||||||
| SOA | a.twnic.net.twsnw@twnic.net.tw serial=2006391558 | ||||||
Same first word
Similar names
DNS History
5 records (5 active, 0 former)
●NSdns1.idp365.net2026-07-22 → 2026-08-13 · 2 obs
● 2026-08-13 03:38:02
●NSdns2.idp365.net2026-07-22 → 2026-08-13 · 2 obs
● 2026-08-13 03:38:02
●NSdns3.idp365.net2026-07-22 → 2026-08-13 · 2 obs
● 2026-08-13 03:38:02
●MXmail.idp365.net2026-07-22 → 2026-08-13 · 2 obs
● 2026-08-13 03:38:02
●A217.19.248.1322026-07-22 → 2026-08-13 · 2 obs
● 2026-08-13 03:38:02
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| tw | g.dns.tw, e.dns.tw, a.dns.tw, c.dns.tw... | - |
| com.tw | a.twnic.net.tw, e.twnic.net.tw, h.twnic.net.tw, c.twnic.net.tw... | 17 records |
| udemy.com.tw | dns1.idp365.net, dns3.idp365.net, dns2.idp365.net | - |
✅ Authoritative Response
Server:162.159.49.254
NS records: dns1.idp365.net, dns3.idp365.net, dns2.idp365.net
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for udemy.com.tw (unsigned zone)
⏱️ Timing
Total: 1500ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 217.19.248.132 |
| NS | 3 | dns1.idp365.net, dns3.idp365.net... |
| MX | 1 | mail.idp365.net (pri: 10) |
| SOA | 1 | dns1.idp365.net hostmaster.idp365.net |
📌 Glue Records Collected
Total: 17
Out-of-bailiwick: 17 (h.twnic.net.tw, g.twnic.net.tw, f.twnic.net.tw...)
Analysis
IP Addresses
udemy.com.tw has exactly one IP address — 217.19.248.132.
udemy.shop, aramex.com.mx, betonline.lu plus two other host names have IP numbers in common with udemy.com.tw.
Name Servers
The authoritative name servers for udemy.com.tw are dns1.idp365.net, dns2.idp365.net and dns3.idp365.net — three in total.
There is at least partial name server overlap between udemy.com.tw and other domains — mercedesbenzvanservice.com, overtaal.nl, vinbrain.net and two more among them.
dns1.idp365.net, dns2.idp365.net and dns3.idp365.net all resolve to exactly two IP numbers apiece: dns1.idp365.net → 162.159.27.131 and 2400:cb00:2049:1::a29f:1b83; dns2.idp365.net → 162.159.48.3 and 2400:cb00:2049:1::a29f:3003; dns3.idp365.net → 162.159.49.254 and 2400:cb00:2049:1::a29f:31fe.
Mail Servers
udemy.com.tw uses one mail server — mail.idp365.net.
The mail server setup of udemy.com.tw matches that of other domains such as jcb.us, achlacasino.net, 365-078.com and two others.
Some mail servers of udemy.com.tw are also used by other domains, notably logisticsconference.co.uk and jeep.co.uk.
mail.idp365.net directs to just one IP number, 217.19.248.131.