`bt51.com`

	CNAME	`overdue.aliyun.com`
	DNSSEC	⚠️ Not signed
	A	170.33.12.185^{🇸🇬 Alibaba_Cloud_SEC170.33.12.0/24 Alibaba.com Singapore E-Commerce Private Limited 8 Shenton Way, 45-01 AXA Tower, Singapore 068811}

`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=1774546022

Subdomains

www.bt51.com

Same first word

bt51.cn

bt51.com

Similar names

51bt.net

bt15.co.uk

15bt.info

t15b.org

t5b1.com

1t5b.cn

15tb.com

b15t.com

tb51.net

bt15.cn

DNS History

6 records (3 active, 3 former)

●NSdns31.hichina.com2026-02-23 → 2026-03-26 · 3 obs

○ 2016-04-12 05:53:40
● 2026-02-23 11:02:54
● 2026-03-26 17:37:48

●NSdns32.hichina.com2026-02-23 → 2026-03-26 · 3 obs

○ 2016-04-12 05:53:40
● 2026-02-23 11:02:54
● 2026-03-26 17:37:48

○NSv1s1.xundns.com2015-08-17 → 2016-04-12 · 4 obs

● 2015-08-17 01:19:46
● 2016-04-12 05:53:40
○ 2026-02-23 11:02:54
○ 2026-03-26 17:37:48

○NSv1s2.xundns.com2015-08-17 → 2016-04-12 · 4 obs

● 2015-08-17 01:19:46
● 2016-04-12 05:53:40
○ 2026-02-23 11:02:54
○ 2026-03-26 17:37:48

○A139.162.28.682015-10-12 → 2016-04-12 · 4 obs

● 2015-10-12 09:39:50
● 2016-04-12 05:53:40
○ 2026-02-23 11:02:54
○ 2026-03-26 17:37:48

●CNAMEoverdue.aliyun.com2026-02-23 → 2026-03-26 · 2 obs

● 2026-02-23 11:02:54
● 2026-03-26 17:37:48

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
bt51.com	dns31.hichina.com, dns32.hichina.com	18 records

✅ Authoritative Response

Server:120.76.107.39

NS records: dns31.hichina.com, dns32.hichina.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for bt51.com (unsigned zone)

⏱️ Timing

Total: 3980ms | Queries: -

📄 Records

Type	Count	Sample Data
NS	2	`dns32.hichina.com, dns31.hichina.com`
CNAME	1	`overdue.aliyun.com`
SOA	1	`dns31.hichina.com hostmaster.hichina.com`

📌 Glue Records Collected

Total: 18

Out-of-bailiwick: 18 (dns31.hichina.com, dns31.hichina.com, dns31.hichina.com...)

Analysis

Hierarchy

bt51.com is the parent of www.bt51.com.

IP Addresses

bt51.com resolves to a single IP address: 170.33.12.185.

Other host names including wmml.cn, dahaoyun.com, chadeng.cn, tyrol.cn and jqex.cn share IP numbers with bt51.com.

bt51.com - robtex.com

bt51.com

com