`51fth.com`

DNSSEC	⚠️ Not signed
A	154.205.78.169^{🇺🇸 GNET-AS9294154.205.64.0/20}
NS	`a4.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	`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	`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	`b4.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`
SOA	`a.share-dns.com`master@share-dns.com serial=1746195087

`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

Subdomains

appqiniu.51fth.com

Same first word

51fth.com

DNS History

10 records (5 active, 5 former)

●NSa.share-dns.com2026-03-08 → 2026-03-08 · 3 obs

○ 2018-01-03 13:31:00
● 2026-03-08 01:12:18
● 2026-03-08 04:33:34

●NSa4.share-dns.com2026-03-08 → 2026-03-08 · 3 obs

○ 2018-01-03 13:31:00
● 2026-03-08 01:12:18
● 2026-03-08 04:33:34

●NSb.share-dns.net2026-03-08 → 2026-03-08 · 3 obs

○ 2018-01-03 13:31:00
● 2026-03-08 01:12:18
● 2026-03-08 04:33:34

●NSb4.share-dns.net2026-03-08 → 2026-03-08 · 3 obs

○ 2018-01-03 13:31:00
● 2026-03-08 01:12:18
● 2026-03-08 04:33:34

○NSdns10.hichina.com2017-01-05 → 2018-01-03 · 4 obs

● 2017-01-05 00:16:58
● 2018-01-03 13:31:00
○ 2026-03-08 01:12:18
○ 2026-03-08 04:33:34

○NSdns9.hichina.com2017-01-05 → 2018-01-03 · 4 obs

● 2017-01-05 00:16:58
● 2018-01-03 13:31:00
○ 2026-03-08 01:12:18
○ 2026-03-08 04:33:34

○MXmxn.mxhichina.com2017-01-05 → 2017-01-05 · 3 obs

● 2017-01-05 00:16:58
○ 2026-03-08 01:12:18
○ 2026-03-08 04:33:34

○MXmxw.mxhichina.com2017-01-05 → 2017-01-05 · 3 obs

● 2017-01-05 00:16:58
○ 2026-03-08 01:12:18
○ 2026-03-08 04:33:34

○A101.201.73.2082017-01-05 → 2018-01-03 · 4 obs

● 2017-01-05 00:16:58
● 2018-01-03 13:31:00
○ 2026-03-08 01:12:18
○ 2026-03-08 04:33:34

●A154.205.78.1692026-03-08 → 2026-03-08 · 3 obs

○ 2018-01-03 13:31:00
● 2026-03-08 01:12:18
● 2026-03-08 04:33:34

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	l.gtld-servers.net, j.gtld-servers.net, h.gtld-servers.net, d.gtld-servers.net...	-
51fth.com	b4.share-dns.net, a4.share-dns.com	1 record

✅ Authoritative Response

Server: 172.64.53.25

NS records: b4.share-dns.net, a4.share-dns.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

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

⏱️ Timing

Total: 557ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`154.205.78.169`
NS	2	`a.share-dns.com, b.share-dns.net`
SOA	1	`a.share-dns.com master.share-dns.com`

📌 Glue Records Collected

Total: 1

Out-of-bailiwick: 1 (a4.share-dns.com)

Analysis

Hierarchy

The parent of appqiniu.51fth.com is 51fth.com.

IP Addresses

51fth.com points to an IP address: 154.205.78.169.

other host names include appqiniu.51fth.com, xinhua558.com, numivcoin.com, itsashland.com and djycxg.com; they share IP numbers with 51fth.com.

Name Servers

51fth.com delegates to four name servers: a4.share-dns.com, a.share-dns.com, b4.share-dns.net and b.share-dns.net.

51fth.com at least partially shares name servers with other domains, for instance zhonmedia.com, zyfzd.top, oo2222.com, 66qhd.com and 9603dtf34.top.