91dev.tw - dns.ninja
91dev.tw
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=2011025951 | ||||||
Subdomains
Same first word
91dev.tw |
Similar names
DNS History
9 records (5 active, 4 former)
○NSns-1472.awsdns-56.org2017-05-07 → 2017-09-15 · 5 obs
● 2017-05-07 17:25:48
● 2017-09-15 15:57:10
○ 2026-03-01 03:06:18
○ 2026-06-23 00:00:00
●NSns-1512.awsdns-61.org2016-12-05 → 2026-06-23 · 4 obs
○ 2017-05-07 17:25:48
● 2017-09-15 15:57:10
● 2026-06-23 00:00:00
○NSns-152.awsdns-19.com2017-05-07 → 2017-09-15 · 5 obs
● 2017-05-07 17:25:48
● 2017-09-15 15:57:10
○ 2026-03-01 03:06:18
○ 2026-06-23 00:00:00
○NSns-1587.awsdns-06.co.uk2017-05-07 → 2017-09-15 · 5 obs
● 2017-05-07 17:25:48
● 2017-09-15 15:57:10
○ 2026-03-01 03:06:18
○ 2026-06-23 00:00:00
●NSns-2039.awsdns-62.co.uk2016-12-05 → 2026-06-23 · 5 obs
○ 2017-05-07 17:25:48
○ 2017-09-15 15:57:10
● 2026-03-01 03:06:18
● 2026-06-23 00:00:00
○NSns-550.awsdns-04.net2017-05-07 → 2017-09-15 · 5 obs
● 2017-05-07 17:25:48
● 2017-09-15 15:57:10
○ 2026-03-01 03:06:18
○ 2026-06-23 00:00:00
●NSns-595.awsdns-10.net2016-12-05 → 2026-06-23 · 5 obs
○ 2017-05-07 17:25:48
○ 2017-09-15 15:57:10
● 2026-03-01 03:06:18
● 2026-06-23 00:00:00
●NSns-9.awsdns-01.com2016-12-05 → 2026-06-23 · 5 obs
○ 2017-05-07 17:25:48
○ 2017-09-15 15:57:10
● 2026-03-01 03:06:18
● 2026-06-23 00:00:00
●MXinbound-smtp.us-west-2.amazonaws.com2026-03-01 → 2026-06-23 · 2 obs
● 2026-06-23 00:00:00
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| tw | a.dns.tw, b.dns.tw, c.dns.tw, d.dns.tw... | - |
| 91dev.tw | ns-9.awsdns-01.com, ns-1512.awsdns-61.org, ns-595.awsdns-10.net, ns-2039.awsdns-62.co.uk | - |
✅ Authoritative Response
Server:205.251.199.247
NS records: ns-9.awsdns-01.com, ns-1512.awsdns-61.org, ns-595.awsdns-10.net, ns-2039.awsdns-62.co.uk
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for 91dev.tw (unsigned zone)
⏱️ Timing
Total: 803ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| NS | 4 | ns-1512.awsdns-61.org, ns-2039.awsdns-62.co.uk... |
| MX | 1 | inbound-smtp.us-west-2.amazonaws.com (pr |
| TXT | 1 | google-site-verification=T6Pw6AHMx8g7RHn |
| SOA | 1 | ns-1512.awsdns-61.org awsdns-hostmaster. |
Analysis
Hierarchy
The domain 91dev.tw is parent to qa.91dev.tw, hk.91dev.tw and act11.91dev.tw.
Name Servers
The authoritative name servers for 91dev.tw are ns-9.awsdns-01.com, ns-595.awsdns-10.net, ns-1512.awsdns-61.org and ns-2039.awsdns-62.co.uk.
At least some of 91dev.tw's name servers are shared with other domains, for example d3hyi3kjsgoto3.cloudfront.net, healthycare.link, mike(0x6469636b)ey.com and two more.
Four hostnames, each resolving to a pair of IP addresses: ns-9.awsdns-01.com directs to 205.251.192.9 and 2600:9000:5300:900::1; ns-595.awsdns-10.net directs to 205.251.194.83 and 2600:9000:5302:5300::1; ns-1512.awsdns-61.org directs to 205.251.197.232 and 2600:9000:5305:e800::1; ns-2039.awsdns-62.co.uk directs to 205.251.199.247 and 2600:9000:5307:f700::1.
Mail Servers
Mail for 91dev.tw is handled by a single mail server, inbound-smtp.us-west-2.amazonaws.com.
91dev.tw uses an identical mail server configuration to several other domains — among them trains.willer.co.jp, ampaws.com.au, swapthings.co and two more.
91dev.tw has at least partial mail server overlap with other domains such as icasit.atlassian.net, gkfplc.atlassian.net, dongenergy.atlassian.net and two more.
This set of mail servers commonly appears together with the mail servers inbound-smtp.us-east-1.amazonaws.com.
inbound-smtp.us-west-2.amazonaws.com has four IP addresses: 35.161.157.106, 52.13.163.116, 52.43.162.244 and 54.188.121.70.