top - robtex.com
top
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a.zdnscloud.com ⭐ | ||||||
| A | 203.99.24.1🇨🇳 ZDNS203.99.24.0/24 Internet Domain Name System Beijing Engineering Resrarch Center Ltd. | ||||||
| PTR | a.zdnscloud.com | ||||||
| NS | a.zdnscloud.cn | ||||||
| A | 203.99.24.1🇨🇳 ZDNS203.99.24.0/24 Internet Domain Name System Beijing Engineering Resrarch Center Ltd. | ||||||
| PTR | a.zdnscloud.com | ||||||
| NS | b.zdnscloud.cn | ||||||
| A | 203.99.25.1🇨🇳 ZDNS203.99.25.0/24 Internet Domain Name System Beijing Engineering Resrarch Center Ltd. | ||||||
| PTR | b.zdnscloud.com | ||||||
| NS | c.zdnscloud.com | ||||||
| NS | d.zdnscloud.com | ||||||
| A | 203.99.27.1🇨🇳 ZDNS203.99.27.0/24 Internet Domain Name System Beijing Engineering Resrarch Center Ltd. | ||||||
| PTR | d.zdnscloud.com | ||||||
| NS | e.zdnscloud.cn | ||||||
| NS | f.zdnscloud.cn | ||||||
| A | 116.169.54.111🇨🇳 CHINA169-Backbone116.169.0.0/16 route of Chinaunicom | ||||||
| NS | i.zdnscloud.cn | ||||||
| A | 2401:8d00:1::1🇨🇳 ZDNS2401:8d00:1::/48 Internet Domain Name System Beijing Engineering Resrarch Center Ltd. | ||||||
| NS | j.zdnscloud.com | ||||||
| A | 2401:8d00:2::1🇨🇳 ZDNS2401:8d00:2::/48 Internet Domain Name System Beijing Engineering Resrarch Center Ltd. | ||||||
| PTR | j.zdnscloud.com | ||||||
| TXT | 2026-10-17_19:05:01 | ||||||
| SOA | a.zdnscloud.comtd_dns_gtld@knet.cn serial=1397425239 | ||||||
(root)
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a.root-servers.net ⭐ ⚠️ Not in parent delegation | ||||||
| NS | b.root-servers.net ⚠️ Not in parent delegation | ||||||
| NS | c.root-servers.net ⚠️ Not in parent delegation | ||||||
| NS | d.root-servers.net ⚠️ Not in parent delegation | ||||||
| NS | e.root-servers.net ⚠️ Not in parent delegation | ||||||
| NS | f.root-servers.net ⚠️ Not in parent delegation | ||||||
| NS | g.root-servers.net ⚠️ Not in parent delegation | ||||||
| NS | h.root-servers.net ⚠️ Not in parent delegation | ||||||
| NS | i.root-servers.net ⚠️ Not in parent delegation | ||||||
| NS | j.root-servers.net ⚠️ Not in parent delegation | ||||||
| NS | k.root-servers.net ⚠️ Not in parent delegation | ||||||
| NS | l.root-servers.net ⚠️ Not in parent delegation | ||||||
| NS | m.root-servers.net ⚠️ Not in parent delegation | ||||||
| SOA | a.root-servers.netnstld@verisign-grs.com 2026-10-17 #0 | ||||||
Previously NS for
Subdomains
Same first word
Similar names
Previous names
DNS History
14 records (9 active, 5 former)
●NSa.zdnscloud.cn2026-02-16 → 2026-10-17 · 3 obs
● 2026-02-16 16:51:52
● 2026-10-17 11:18:34
●NSa.zdnscloud.com2015-08-29 → 2026-10-17 · 2 obs
● 2026-10-17 11:18:34
●NSb.zdnscloud.cn2026-02-16 → 2026-10-17 · 3 obs
● 2026-02-16 16:51:52
● 2026-10-17 11:18:34
○NSb.zdnscloud.com2015-08-29 → 2021-12-07 · 4 obs
● 2021-12-07 00:48:44
○ 2026-02-16 16:51:52
○ 2026-10-17 11:18:34
●NSc.zdnscloud.com2015-08-29 → 2026-10-17 · 2 obs
● 2026-10-17 11:18:34
●NSd.zdnscloud.com2015-08-29 → 2026-10-17 · 2 obs
● 2026-10-17 11:18:34
●NSe.zdnscloud.cn2026-04-13 → 2026-10-17 · 3 obs
● 2026-04-13 10:13:36
● 2026-10-17 11:18:34
○NSe.zdnscloud.com2015-08-29 → 2018-03-06 · 4 obs
● 2018-03-06 23:53:00
○ 2018-03-08 10:33:54
○ 2026-10-17 11:18:34
●NSf.zdnscloud.cn2026-02-16 → 2026-10-17 · 3 obs
● 2026-02-16 16:51:52
● 2026-10-17 11:18:34
○NSf.zdnscloud.com2015-08-29 → 2021-12-07 · 4 obs
● 2021-12-07 00:48:44
○ 2026-02-16 16:51:52
○ 2026-10-17 11:18:34
○NSg.zdnscloud.com2015-08-29 → 2026-04-15 · 4 obs
● 2026-04-15 20:59:36
○ 2026-04-15 21:34:50
○ 2026-10-17 11:18:34
●NSi.zdnscloud.cn2026-02-16 → 2026-10-17 · 3 obs
● 2026-02-16 16:51:52
● 2026-10-17 11:18:34
○NSi.zdnscloud.com2015-08-29 → 2021-12-07 · 4 obs
● 2021-12-07 00:48:44
○ 2026-02-16 16:51:52
○ 2026-10-17 11:18:34
●NSj.zdnscloud.com2015-08-29 → 2026-10-17 · 2 obs
● 2026-10-17 11:18:34
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| top | a.zdnscloud.cn, b.zdnscloud.cn, c.zdnscloud.com, d.zdnscloud.com... | 9 records |
✅ Authoritative Response
Server:203.99.24.1
NS records: a.zdnscloud.cn, b.zdnscloud.cn, c.zdnscloud.com, d.zdnscloud.com, e.zdnscloud.cn, f.zdnscloud.cn, i.zdnscloud.cn, j.zdnscloud.com
🔒 DNSSEC Status
🔐 Secure (DNSSEC validated)
Chain of trust verified from root to domain
⏱️ Timing
Total: 1127ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| NS | 8 | a.zdnscloud.cn, b.zdnscloud.cn... |
| TXT | 1 | 2026-10-17_19:15:01 |
| SOA | 1 | a.zdnscloud.com td_dns_gtld.knet.cn |
📌 Glue Records Collected
Total: 9
Out-of-bailiwick: 9 (a.zdnscloud.cn, b.zdnscloud.cn, c.zdnscloud.com...)
Analysis
Hierarchy
top serves as the parent domain for 7draj.top, xkpn7zqa-jq2v4th.top, 109jili.top, qvsvn.top, yeweiwei.top and hundreds of thousands of other host names.
Name Servers
DNS for top is handled by 9 name servers: a.zdnscloud.cn, b.zdnscloud.cn, e.zdnscloud.cn and 6 others.
top partially shares its NS delegation with several other domains, including xn--ses554g, xn--otu796d, ren and two others.
In DNS configurations, these name servers often share authority with a.zdnscloud.com, c.zdnscloud.com, d.zdnscloud.com and 4 other name servers.
Host names resolving to a single IP address:
a.zdnscloud.cn directs to 203.99.24.1.
b.zdnscloud.cn directs to 203.99.25.1.
f.zdnscloud.cn directs to 116.169.54.111.
i.zdnscloud.cn directs to 2401:8d00:1::1.
a.zdnscloud.com directs to 203.99.24.1.
d.zdnscloud.com directs to 203.99.27.1.
j.zdnscloud.com directs to 2401:8d00:2::1.
Host names pointing to 203.99.24.1 IP addresses: a.zdnscloud.cn and a.zdnscloud.com.