`51xwb.com`

DNSSEC	⚠️ Not signed
A	221.224.3.74^{🇨🇳 CHINANET-BACKBONE221.224.0.0/13 ChinaNet Jiangsu Network}
NS	`dns13.hichina.com` ⭐
		A	2408:4009:501::21^{🇨🇳 Alibaba-Cloud2408:4009:501::/48}
		A	39.96.153.42^{🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC}
		A	39.96.153.52^{🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC}
		A	47.118.199.202^{🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd.}
		A	47.118.199.212^{🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd.}
		A	120.76.107.42^{🇨🇳 Alibaba-Cloud120.76.0.0/17}
		A	120.76.107.52^{🇨🇳 Alibaba-Cloud120.76.0.0/17}
		A	139.224.142.112^{🇨🇳 Alibaba-Cloud139.224.128.0/17 China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District,}
		A	139.224.142.122^{🇨🇳 Alibaba-Cloud139.224.128.0/17 China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District,}
NS	`dns14.hichina.com`
		A	2408:4009:501::22^{🇨🇳 Alibaba-Cloud2408:4009:501::/48}
		A	39.96.153.41^{🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC}
		A	39.96.153.51^{🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC}
		A	47.118.199.201^{🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd.}
		A	47.118.199.211^{🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd.}
		A	120.76.107.41^{🇨🇳 Alibaba-Cloud120.76.0.0/17}
		A	120.76.107.51^{🇨🇳 Alibaba-Cloud120.76.0.0/17}
		A	139.224.142.111^{🇨🇳 Alibaba-Cloud139.224.128.0/17 China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District,}
		A	139.224.142.121^{🇨🇳 Alibaba-Cloud139.224.128.0/17 China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District,}
MX	`mxbiz1.qq.com` ⭐
MX	`mxbiz2.qq.com`⁽¹⁰⁾
TXT	`2d3184c5528b8b0a6100dfa5f6ad295fd1995146a688657bfadf0d54f7c8b596`
TXT	`v=spf1 include:spf.mail.qq.com ~all`
TXT	`8662b8d1bc2843a827645545f4060eba5bd449e759b5e2ccc0ec84d9ce9c9d3f`
TXT	`v=spf1 include:spf.51xwb.com -all`
SOA	`dns13.hichina.com`hostmaster@hichina.com 2026-06-04 #13

`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=1781788585

Same first word

51xwb.com

Similar names

xwb51.com

51xbw.com

DNS History

10 records (5 active, 5 former)

●NSdns13.hichina.com2017-03-18 → 2026-06-18 · 3 obs

○ 2016-07-15 13:16:16
● 2017-03-18 05:05:22
● 2026-06-18 13:31:18

●NSdns14.hichina.com2017-03-18 → 2026-06-18 · 3 obs

○ 2016-07-15 13:16:16
● 2017-03-18 05:05:22
● 2026-06-18 13:31:18

○NSdns31.hichina.com2015-08-19 → 2015-12-04 · 4 obs

● 2015-08-19 09:53:58
● 2015-12-04 14:05:04
○ 2016-03-01 06:31:34
○ 2026-06-18 13:31:18

○NSdns32.hichina.com2015-08-19 → 2015-12-04 · 4 obs

● 2015-08-19 09:53:58
● 2015-12-04 14:05:04
○ 2016-03-01 06:31:34
○ 2026-06-18 13:31:18

○NSvip1.alidns.com2016-03-01 → 2016-07-15 · 5 obs

○ 2015-12-04 14:05:04
● 2016-03-01 06:31:34
● 2016-07-15 13:16:16
○ 2017-03-18 05:05:22
○ 2026-06-18 13:31:18

○NSvip2.alidns.com2016-03-01 → 2016-07-15 · 5 obs

○ 2015-12-04 14:05:04
● 2016-03-01 06:31:34
● 2016-07-15 13:16:16
○ 2017-03-18 05:05:22
○ 2026-06-18 13:31:18

○MXmail.51xwb.com2015-08-19 → 2016-07-15 · 4 obs

● 2015-08-19 09:53:58
● 2016-07-15 13:16:16
○ 2017-03-18 05:05:22
○ 2026-06-18 13:31:18

●MXmxbiz1.qq.com2026-05-18 → 2026-06-18 · 3 obs

○ 2017-03-18 05:05:22
● 2026-05-18 07:44:32
● 2026-06-18 13:31:18

●MXmxbiz2.qq.com2026-05-18 → 2026-06-18 · 3 obs

○ 2017-03-18 05:05:22
● 2026-05-18 07:44:32
● 2026-06-18 13:31:18

●A221.224.3.742015-08-19 → 2026-06-18 · 2 obs

● 2015-08-19 09:53:58
● 2026-06-18 13:31:18

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
51xwb.com	dns13.hichina.com, dns14.hichina.com	18 records

✅ Authoritative Response

Server:2408:4009:501::22

NS records: dns13.hichina.com, dns14.hichina.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

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

⏱️ Timing

Total: 2780ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`221.224.3.74`
NS	2	`dns13.hichina.com, dns14.hichina.com`
MX	2	`mxbiz2.qq.com (pri: 10), mxbiz1.qq.com (pri: 5)`
TXT	4	`v=spf1 include:spf.51xwb.com -all, 2d3184c5528b8b0a6100dfa5f6ad295fd1995146...`
SOA	1	`dns13.hichina.com hostmaster.hichina.com`

📌 Glue Records Collected

Total: 18

Out-of-bailiwick: 18 (dns13.hichina.com, dns13.hichina.com, dns13.hichina.com...)

Analysis

IP Addresses

51xwb.com resolves to one IP address: 221.224.3.74.

Name Servers

51xwb.com has two authoritative name servers — dns13.hichina.com and dns14.hichina.com.

51xwb.com uses the same name servers as several other domains — among them bonnpaints.com, bzbid.com.cn, dzgongsi.com and two more.

Some of 51xwb.com's name servers are also used by other domains, including kao-la.com, gotn.org, bdlz.com.cn and tepaopen.org.

These name servers are regularly seen alongside expirens3.hichina.com and expirens4.hichina.com as name servers.

Hostnames that resolve to 9 IP addresses:

dns13.hichina.com points to 39.96.153.42, 39.96.153.52, 47.118.199.202 and 6 other IP addresses.

dns14.hichina.com points to 39.96.153.41, 39.96.153.51, 47.118.199.201 and 6 other IP addresses.

Mail Servers

Mail for 51xwb.com is handled by two mail servers — mxbiz1.qq.com and mxbiz2.qq.com.

51xwb.com uses an identical mail server configuration to several other domains — among them kouqiangshipin.com, chatu.com, ycebd.com and two more.

51xwb.com has at least partial mail server overlap with other domains such as iinti.cn, cqxzjy.com, szpaec.com and two more.

51xwb.com - robtex.com

51xwb.com

com