polytcb.cn - robtex.com
polytcb.cn
| DNSSEC | ⚠️ Not signed | ||||||
| A | 156.244.253.94🇺🇸 GNET-AS9294156.244.240.0/20 | ||||||
| NS | ns1.julydns.com ⭐ ⚠️ Not in parent delegation | ||||||
| A | 162.159.48.223Cloudflare162.159.48.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| NS | ns1.judns.com ⚠️ Not in zone NS records | ||||||
| A | 162.159.27.251Cloudflare162.159.27.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| NS | ns2.judns.com ⚠️ Not in zone NS records | ||||||
| A | 162.159.27.251Cloudflare162.159.27.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| NS | ns2.julydns.com ⚠️ Not in parent delegation | ||||||
| A | 162.159.48.223Cloudflare162.159.48.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| SOA | ns1.julydns.commaster@jmdns.com serial=1775572196 | ||||||
cn
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a.dns.cn ⭐ | ||||||
| NS | b.dns.cn | ||||||
| NS | c.dns.cn | ||||||
| NS | d.dns.cn | ||||||
| NS | e.dns.cn | ||||||
| NS | ns.cernet.net ⚠️ Not in parent delegation | ||||||
| SOA | a.dns.cnroot@cnnic.cn serial=2034725704 | ||||||
Same first word
polytcb.cn |
DNS History
5 records (5 active, 0 former)
●NSns1.julydns.com2026-04-14 → 2026-04-29 · 2 obs
● 2026-04-29 01:00:44
●NSns2.julydns.com2026-04-14 → 2026-04-29 · 2 obs
● 2026-04-29 01:00:44
●A156.244.253.942026-04-14 → 2026-04-29 · 2 obs
● 2026-04-29 01:00:44
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cn | a.dns.cn, b.dns.cn, c.dns.cn, d.dns.cn... | - |
| polytcb.cn | ns1.judns.com, ns2.judns.com | - |
✅ Authoritative Response
Server:162.159.27.251
NS records: ns1.judns.com, ns2.judns.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for polytcb.cn (unsigned zone)
⏱️ Timing
Total: 1489ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 156.244.253.94 |
| NS | 2 | ns1.julydns.com, ns2.julydns.com |
| SOA | 1 | ns1.julydns.com master.jmdns.com |
Analysis
IP Addresses
polytcb.cn resolves to one IP number: 156.244.253.94.
Other host names, for instance t0aiof0fr.cn, sunvor.cn, irame.cn and tpjjw.cn share IP numbers with polytcb.cn.
Name Servers
polytcb.cn is delegated to four name servers: ns1.judns.com, ns2.judns.com, ns1.julydns.com and ns2.julydns.com.
polytcb.cn at least partially shares name servers with other domains, for instance jsyzzo.com, xthaihui.com, skop.cn, xilinghu.com and tealifeeast.com.
These name servers are commonly used alongside jm1.dns.com and jm2.dns.com.
Host names with a single IP:
ns1.judns.com points to 162.159.27.251.
ns2.judns.com points to 162.159.27.251.
ns1.julydns.com points to 162.159.48.223.
ns2.julydns.com points to 162.159.48.223.
Host names pointing to 162.159.27.251: ns1.judns.com and ns2.judns.com.
Host names pointing to 162.159.48.223: ns1.julydns.com and ns2.julydns.com.