51about.com - robtex.com
51about.com
| DNSSEC | ⚠️ Not signed | ||||||
| NS | a.share-dns.com ⚠️ Not in zone NS records | ||||||
| A | 172.64.53.25🇺🇸 Cloudflare172.64.53.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| NS | a11.share-dns.com ⚠️ Not in parent delegation | ||||||
| A | 172.64.53.25🇺🇸 Cloudflare172.64.53.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| NS | b.share-dns.net ⚠️ Not in zone NS records | ||||||
| A | 172.64.52.239 | ||||||
| NS | b11.share-dns.net ⚠️ Not in parent delegation | ||||||
| A | 172.64.52.239 | ||||||
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=1778747491 | ||||||
Same first word
51about.com |
DNS History
9 records (4 active, 5 former)
●NSa.share-dns.com2026-05-14 → 2026-05-14 · 3 obs
● 2026-05-14 08:38:28
● 2026-05-14 08:38:30
●NSa11.share-dns.com2026-05-14 → 2026-05-14 · 3 obs
● 2026-05-14 08:38:28
● 2026-05-14 08:38:30
●NSb.share-dns.net2026-05-14 → 2026-05-14 · 3 obs
● 2026-05-14 08:38:28
● 2026-05-14 08:38:30
●NSb11.share-dns.net2026-05-14 → 2026-05-14 · 3 obs
● 2026-05-14 08:38:28
● 2026-05-14 08:38:30
○NSdns10.hichina.com2016-03-27 → 2017-03-22 · 4 obs
● 2017-03-22 09:40:08
○ 2026-05-14 08:38:28
○ 2026-05-14 08:38:30
○NSdns9.hichina.com2016-03-27 → 2017-03-22 · 4 obs
● 2017-03-22 09:40:08
○ 2026-05-14 08:38:28
○ 2026-05-14 08:38:30
○MXmxn.mxhichina.com2016-03-27 → 2017-03-22 · 4 obs
● 2017-03-22 09:40:08
○ 2026-05-14 08:38:28
○ 2026-05-14 08:38:30
○MXmxw.mxhichina.com2016-03-27 → 2017-03-22 · 4 obs
● 2017-03-22 09:40:08
○ 2026-05-14 08:38:28
○ 2026-05-14 08:38:30
○A47.252.9.1822026-05-14 → 2026-05-14 · 2 obs
○ 2026-05-14 08:38:30
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | l.gtld-servers.net, j.gtld-servers.net, h.gtld-servers.net, d.gtld-servers.net... | - |
| 51about.com | b11.share-dns.net, a11.share-dns.com | 1 record |
✅ Authoritative Response
Server:172.64.53.25
NS records: b11.share-dns.net, a11.share-dns.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for 51about.com (unsigned zone)
⏱️ Timing
Total: 1462ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| NS | 2 | a.share-dns.com, b.share-dns.net |
📌 Glue Records Collected
Total: 1
Out-of-bailiwick: 1 (a11.share-dns.com)
Analysis
Name Servers
51about.com is delegated to four name servers: a11.share-dns.com, a.share-dns.com, b11.share-dns.net and b.share-dns.net.
Host names with one IP number:
The host name a11.share-dns.com points to: 172.64.53.25.
The host name a.share-dns.com points to: 172.64.53.25.
The host name b11.share-dns.net points to: 172.64.52.239.
The host name b.share-dns.net points to: 172.64.52.239.
Host names that point to 172.64.53.25 : a11.share-dns.com and a.share-dns.com.
Host names that point to 172.64.52.239 : b11.share-dns.net and b.share-dns.net.