1buedu.cn - robtex.com
1buedu.cn
| DNSSEC | ⚠️ Not signed | ||||||
| A | 173.249.187.111🇺🇸 BETTER-HK173.249.187.0/24 client's prefix | ||||||
| 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=1775908811 | ||||||
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=2034956880 | ||||||
Same first word
DNS History
5 records (5 active, 0 former)
●NSns1.julydns.com2026-06-10 → 2026-06-23 · 2 obs
● 2026-06-23 01:40:14
●NSns2.julydns.com2026-06-10 → 2026-06-23 · 2 obs
● 2026-06-23 01:40:14
●A173.249.187.1112026-06-10 → 2026-06-23 · 2 obs
● 2026-06-23 01:40:14
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cn | a.dns.cn, b.dns.cn, c.dns.cn, d.dns.cn... | - |
| 1buedu.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 1buedu.cn (unsigned zone)
⏱️ Timing
Total: 1358ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 173.249.187.111 |
| NS | 2 | ns1.julydns.com, ns2.julydns.com |
| SOA | 1 | ns1.julydns.com master.jmdns.com |
Analysis
IP Addresses
1buedu.cn resolves to just one IP address, 173.249.187.111.
Two other host names, along with cdbaxd.com, zhxbf.cn and changzhoushi.zhilianit.cn, also share IP numbers with 1buedu.cn.
Name Servers
The NS records for 1buedu.cn point to four name servers: ns1.judns.com, ns2.judns.com, ns1.julydns.com and ns2.julydns.com.
1buedu.cn partially shares its NS delegation with several other domains, including zhongchaobifen.mobi, ecgsd.cn, yinct.com and two others.
The name servers ns1.onclouddns.com, ns2.onclouddns.com, jm1.dns.com and jm2.dns.com are often found in use alongside these name servers.
ns1.judns.com resolves to 162.159.27.251, as does ns2.judns.com. ns1.julydns.com resolves to 162.159.48.223, as does ns2.julydns.com.
These two host names — ns1.judns.com and ns2.judns.com — each point to 162.159.27.251 IP addresses.
These two host names — ns1.julydns.com and ns2.julydns.com — each point to 162.159.48.223 IP addresses.