udemy.tw - robtex.com
udemy.tw
| DNSSEC | ⚠️ Not signed | ||||||
| A | 217.19.248.132🇬🇧 SAFENAMES-AS217.19.248.0/24 Safenames Datacentre | ||||||
| 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 | ||||||
tw
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a.dns.tw ⭐ | ||||||
| NS | anytld.apnic.net ⚠️ Not in parent delegation | ||||||
| NS | b.dns.tw | ||||||
| NS | c.dns.tw | ||||||
| NS | d.dns.tw | ||||||
| NS | e.dns.tw | ||||||
| NS | f.dns.tw | ||||||
| NS | g.dns.tw | ||||||
| NS | h.dns.tw | ||||||
| SOA | a.dns.twsnw@twnic.net.tw serial=2011034366 | ||||||
Same first word
Similar names
DNS History
5 records (5 active, 0 former)
●NSdns1.idp365.net2026-05-26 → 2026-07-16 · 2 obs
● 2026-07-16 06:25:18
●NSdns2.idp365.net2026-05-26 → 2026-07-16 · 2 obs
● 2026-07-16 06:25:18
●NSdns3.idp365.net2026-05-26 → 2026-07-16 · 2 obs
● 2026-07-16 06:25:18
●MXmail.idp365.net2026-05-26 → 2026-07-16 · 2 obs
● 2026-07-16 06:25:18
●A217.19.248.1322026-05-26 → 2026-07-16 · 2 obs
● 2026-07-16 06:25:18
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| tw | d.dns.tw, a.dns.tw, e.dns.tw, b.dns.tw... | 16 records |
| udemy.tw | dns3.idp365.net, dns2.idp365.net, dns1.idp365.net | - |
✅ Authoritative Response
Server:162.159.27.131
NS records: dns3.idp365.net, dns2.idp365.net, dns1.idp365.net
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for udemy.tw (unsigned zone)
⏱️ Timing
Total: 875ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 217.19.248.132 |
| NS | 3 | dns3.idp365.net, dns1.idp365.net... |
| MX | 1 | mail.idp365.net (pri: 10) |
| SOA | 1 | dns1.idp365.net hostmaster.idp365.net |
📌 Glue Records Collected
Total: 16
In-bailiwick: 14 (a.dns.tw, b.dns.tw, c.dns.tw...)
Out-of-bailiwick: 2 (anytld.apnic.net, anytld.apnic.net)
Analysis
IP Addresses
udemy.tw has exactly one IP address — 217.19.248.132.
indigopalmsjeans.com, execflat.com, myrfotst4.biz plus two other host names have IP numbers in common with udemy.tw.
Name Servers
The authoritative name servers for udemy.tw are dns1.idp365.net, dns2.idp365.net and dns3.idp365.net — three in total.
At least some of udemy.tw's name servers are shared with other domains, for example belzona.com.tr, enlihealth.com, idex-hs.com and two more.
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.tw uses one mail server — mail.idp365.net.
The mail server setup of udemy.tw matches that of other domains such as netplaytv.sc, aponlinepd.com, argusonline.org and two others.
udemy.tw overlaps on mail servers with certain other domains, stratabuilder.com among them.
mail.idp365.net directs to just one IP number, 217.19.248.131.