`51ofc.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}
			PTR	`ip-172-64-53-25.defastlink.net`
NS	`a2.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}
			PTR	`ip-172-64-53-25.defastlink.net`
NS	`b.share-dns.net` ⚠️ Not in zone NS records
		A	172.64.52.239^{🇺🇸 Cloudflare172.64.52.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ip-172-64-52-239.defastlink.net`
NS	`b2.share-dns.net` ⚠️ Not in parent delegation
		A	172.64.52.239^{🇺🇸 Cloudflare172.64.52.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ip-172-64-52-239.defastlink.net`

`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.net`nstld@verisign-grs.com serial=1771291435

Same first word

51ofc.net

51ofc.com

Similar names

51cfo.cn

cfo51.com

51cfo.com.cn

DNS History

14 records (4 active, 10 former)

●NSa.share-dns.com2026-03-23 → 2026-03-23 · 2 obs

○ 2020-11-15 21:08:10
● 2026-03-23 15:32:50

●NSa2.share-dns.com2026-03-23 → 2026-03-23 · 2 obs

○ 2020-11-15 21:08:10
● 2026-03-23 15:32:50

●NSb.share-dns.net2026-03-23 → 2026-03-23 · 2 obs

○ 2020-11-15 21:08:10
● 2026-03-23 15:32:50

●NSb2.share-dns.net2026-03-23 → 2026-03-23 · 2 obs

○ 2020-11-15 21:08:10
● 2026-03-23 15:32:50

○NSexp1.julydns.com2026-03-23 → 2026-03-23 · 1 obs

○ 2026-03-23 15:32:50

○NSexp2.julydns.com2026-03-23 → 2026-03-23 · 1 obs

○ 2026-03-23 15:32:50

○NSns1.myhostadmin.net2015-08-20 → 2020-11-15 · 3 obs

● 2015-08-20 21:24:46
● 2020-11-15 21:08:10
○ 2026-03-23 15:32:50

○NSns2.myhostadmin.net2015-08-20 → 2017-03-27 · 3 obs

● 2015-08-20 21:24:46
● 2017-03-27 06:26:34
○ 2026-03-23 15:32:50

○NSns3.myhostadmin.net2015-08-20 → 2017-03-27 · 3 obs

● 2015-08-20 21:24:46
● 2017-03-27 06:26:34
○ 2026-03-23 15:32:50

○NSns4.myhostadmin.net2015-08-20 → 2017-03-27 · 3 obs

● 2015-08-20 21:24:46
● 2017-03-27 06:26:34
○ 2026-03-23 15:32:50

○NSns5.myhostadmin.net2015-08-20 → 2017-03-27 · 3 obs

● 2015-08-20 21:24:46
● 2017-03-27 06:26:34
○ 2026-03-23 15:32:50

○NSns6.myhostadmin.net2015-08-20 → 2017-03-27 · 3 obs

● 2015-08-20 21:24:46
● 2017-03-27 06:26:34
○ 2026-03-23 15:32:50

○A114.55.94.872017-03-27 → 2017-03-27 · 3 obs

● 2017-03-27 06:26:34
○ 2020-11-15 21:08:10
○ 2026-03-23 15:32:50

○CNAMEexp.julydns.com2026-03-23 → 2026-03-23 · 1 obs

○ 2026-03-23 15:32:50

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
51ofc.com	b2.share-dns.net, a2.share-dns.com	1 record

✅ Authoritative Response

Server:172.64.53.25

NS records: b2.share-dns.net, a2.share-dns.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for 51ofc.com (unsigned zone)

⏱️ Timing

Total: 115ms | 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 (a2.share-dns.com)

Analysis

Name Servers

51ofc.com delegates to four name servers: a2.share-dns.com, a.share-dns.com, b2.share-dns.net and b.share-dns.net.

51ofc.com at least partially shares name servers with other domains, for instance 558yu.com, 35mz.com, gfwaszhbvdecsxuns.top, 92watch.com and 8fmk.com.