f5u.net - robtex.com
f5u.net
net
| 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=1771291465 | ||||||
Same first word
Similar names
DNS History
9 records (4 active, 5 former)
●NSdns21.hichina.com2026-03-19 → 2026-03-20 · 3 obs
● 2026-03-19 05:17:22
● 2026-03-20 22:00:52
●NSdns22.hichina.com2026-03-19 → 2026-03-20 · 3 obs
● 2026-03-19 05:17:22
● 2026-03-20 22:00:52
○NSns11.xincache.com2016-10-14 → 2016-10-14 · 4 obs
● 2016-10-14 17:14:24
○ 2026-03-19 05:17:22
○ 2026-03-20 22:00:52
○NSns12.xincache.com2016-10-14 → 2016-10-14 · 4 obs
● 2016-10-14 17:14:24
○ 2026-03-19 05:17:22
○ 2026-03-20 22:00:52
○NSns13.xincache.com2015-08-21 → 2016-10-14 · 4 obs
● 2016-10-14 17:14:24
○ 2026-03-19 05:17:22
○ 2026-03-20 22:00:52
○NSns14.xincache.com2015-08-21 → 2016-10-14 · 4 obs
● 2016-10-14 17:14:24
○ 2026-03-19 05:17:22
○ 2026-03-20 22:00:52
●MXmxn.mxhichina.com2026-03-19 → 2026-03-20 · 2 obs
● 2026-03-20 22:00:52
●MXmxw.mxhichina.com2026-03-19 → 2026-03-20 · 2 obs
● 2026-03-20 22:00:52
○CNAMEagent.juming.com2017-08-16 → 2017-08-16 · 3 obs
○ 2026-03-19 05:17:22
○ 2026-03-20 22:00:52
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| net | m.gtld-servers.net, b.gtld-servers.net, d.gtld-servers.net, h.gtld-servers.net... | - |
| f5u.net | dns21.hichina.com, dns22.hichina.com | - |
✅ Authoritative Response
Server: 39.96.153.60
NS records: dns21.hichina.com, dns22.hichina.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for f5u.net (unsigned zone)
⏱️ Timing
Total: 1216ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| NS | 2 | dns22.hichina.com, dns21.hichina.com |
| MX | 2 | mxw.mxhichina.com (pri: 10), mxn.mxhichina.com (pri: 5) |
| TXT | 1 | v=spf1 include:spf.mxhichina.com -all |
| SOA | 1 | dns21.hichina.com hostmaster.hichina.com |
Analysis
Name Servers
f5u.net has two name servers: dns21.hichina.com and dns22.hichina.com.
f5u.net shares the same name server setup as other domains, for example rzdxc.com, htepi.com, 20071218.com, reallycnc.cn and miyun.info.
f5u.net shares some name servers with other domains, for example lunwentong.com, nbsun.com, lpfy.gov.cn, tjyushu.com and 38666.co.
These name servers are commonly used with the name servers expirens3.hichina.com, expirens4.hichina.com, ns1.alidns.com, ns2.alidns.com, dns15.hichina.com and dns16.hichina.com.
Host names with nine IP numbers:
dns21.hichina.com points to 2408:4009:501::29, 39.96.153.40, 39.96.153.60, 47.118.199.200, 47.118.199.220, 120.76.107.40, 120.76.107.60, 139.224.142.100 and 139.224.142.110.
dns22.hichina.com points to 2408:4009:501::30, 39.96.153.38, 39.96.153.61, 47.118.199.198, 47.118.199.222, 120.76.107.38, 120.76.107.61, 139.224.142.98 and 139.224.142.108.
Mail Servers
f5u.net is served by two mail servers: mxn.mxhichina.com and mxw.mxhichina.com.
f5u.net shares the mail server setup with other domains, for example santokuflavor.com, skysun.net, precisionmetalworkshop.com, zonbai.com and jxchangyi.com.
f5u.net shares some mail servers with other domains, at least partially; for instance wctte.org, magifan.com, wecards.cn, biyeyun.com and 8hb.cc.
these mail servers are commonly used alongside mx1.qiye.aliyun.com, mx2.qiye.aliyun.com and mx3.qiye.aliyun.com.
Host names with two IP numbers: mxn.mxhichina.com points to: 47.246.136.231 and 47.246.137.47.
Host names with one IP number: mxw.mxhichina.com points to: 47.246.99.195.