u257.com - robtex.com
u257.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 60.199.243.207🇹🇼 TFN-NET60.199.243.0/24 Taiwan Fixed Network | ||||||
| PTR | 60-199-243-207.static.tfn.net.tw | ||||||
| NS | dns1.f1.com.tw ⭐ ⚠️ Not in parent delegation | ||||||
| A | 218.32.213.234🇹🇼 NCIC-TW218.32.192.0/19 New Century InfoComm Tech Co., Ltd. | ||||||
| PTR | sp234.f1.com.tw | ||||||
| NS | dns2.f1.com.tw ⚠️ Not in parent delegation | ||||||
| A | 220.228.6.17🇹🇼 NCIC-TW220.228.0.0/19 New Century InfoComm Tech Co., Ltd. | ||||||
| NS | ns1.oknet.tw ⚠️ Not in zone NS records | ||||||
| A | 220.228.6.98🇹🇼 NCIC-TW220.228.0.0/19 New Century InfoComm Tech Co., Ltd. | ||||||
| NS | ns2.oknet.tw ⚠️ Not in zone NS records | ||||||
| A | 218.32.210.66🇹🇼 NCIC-TW218.32.210.0/24 New Century InfoComm Tech Co., Ltd. | ||||||
| PTR | sp66.f1.com.tw | ||||||
| MX | u257.com ⭐ | ||||||
| A | 60.199.243.207🇹🇼 TFN-NET60.199.243.0/24 Taiwan Fixed Network | ||||||
| PTR | 60-199-243-207.static.tfn.net.tw | ||||||
| MX | www.u257.com(14) | ||||||
| A | 60.199.243.207🇹🇼 TFN-NET60.199.243.0/24 Taiwan Fixed Network | ||||||
| PTR | 60-199-243-207.static.tfn.net.tw | ||||||
| SOA | dns1.f1.com.twohgo@ms23.hinet.net 2000-11-01 #8 | ||||||
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=1785446137 | ||||||
MX for
u257.com |
Subdomains
www.u257.com |
Same first word
u257.com |
Similar names
DNS History
7 records (7 active, 0 former)
●NSdns2.f1.com.tw2015-12-02 → 2026-07-30 · 3 obs
● 2015-12-02 02:30:26
● 2026-07-30 21:21:38
●NSns1.oknet.tw2026-03-22 → 2026-07-30 · 3 obs
● 2026-03-22 13:57:50
● 2026-07-30 21:21:38
●NSns2.oknet.tw2026-03-22 → 2026-07-30 · 3 obs
● 2026-03-22 13:57:50
● 2026-07-30 21:21:38
●MXu257.com2015-08-06 → 2026-07-30 · 2 obs
● 2026-07-30 21:21:38
●MXwww.u257.com2015-08-06 → 2026-07-30 · 2 obs
● 2026-07-30 21:21:38
●A60.199.243.2072015-08-06 → 2026-07-30 · 2 obs
● 2026-07-30 21:21:38
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net... | - |
| u257.com | ns1.oknet.tw, ns2.oknet.tw | - |
✅ Authoritative Response
Server:220.228.6.98
NS records: ns1.oknet.tw, ns2.oknet.tw
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for u257.com (unsigned zone)
⏱️ Timing
Total: 1420ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 60.199.243.207 |
| NS | 2 | dns1.f1.com.tw, dns2.f1.com.tw |
| MX | 2 | u257.com (pri: 10), www.u257.com (pri: 14) |
| SOA | 1 | dns1.f1.com.tw ohgo.ms23.hinet.net |
Analysis
Hierarchy
u257.com is the parent zone for www.u257.com.
Mail Server Role
u257.com is listed as a mail server for itself.
As mail servers, www.u257.com and u257.com are regularly found together.
IP Addresses
u257.com resolves to one IP address: 60.199.243.207.
www.av779.com, www.king674.com, www.(0x736578)y716.com and two other host names share IP numbers with u257.com.
Name Servers
The authoritative name servers for u257.com are ns1.oknet.tw, ns2.oknet.tw, dns1.f1.com.tw and dns2.f1.com.tw.
u257.com partially shares its NS delegation with several other domains, including ggyy090.com, k0938.com, p451.com and two others.
The name servers sp234.f1.com.tw, ns1.icstock.com.tw, ns2.icstock.com.tw and sf243.f1.com.tw are often found in use alongside these name servers.
Each of the four hosts ns1.oknet.tw, ns2.oknet.tw, dns1.f1.com.tw and dns2.f1.com.tw points to a single IP address — ns1.oknet.tw points to 220.228.6.98, ns2.oknet.tw points to 218.32.210.66, dns1.f1.com.tw points to 218.32.213.234 and dns2.f1.com.tw points to 220.228.6.17.
Mail Servers
The domain u257.com has two mail servers: u257.com and www.u257.com.
u257.com resolves to 60.199.243.207; www.u257.com resolves to the same IP address, 60.199.243.207.
Both u257.com and www.u257.com resolve to 60.199.243.207 IP addresses each.