`521up.com`

DNSSEC	⚠️ Not signed
A	123.206.65.156^{🇨🇳 TENCENT-NET-AP123.206.64.0/20 chinanet/CN2 TianJin province network}
NS	`ns3.dnsv3.com` ⭐
		A	2402:4e00:1470:2::11^{🇨🇳 TENCENT-NET-AP2402:4e00:1400::/40}
		A	1.12.0.27^{🇨🇳 TENCENT-NET-AP-CN1.12.0.0/20 ZL-IDC-BOM}
		A	36.155.149.54^{🇨🇳 CMNET-Jiangsu-AP36.155.144.0/21 CMI (Customer Route)}
		A	43.130.172.55^{🇸🇬 TENCENT-NET-AP-CN43.130.160.0/19 ACEVILLE PTE.LTD. 16 COLLYER QUAY 18-29 INCOME AT RAFFLES}
		A	43.140.78.54^{🇨🇳 TENCENT-NET-AP43.140.64.0/18 Tencent Cloud Computing (Beijing) Co., Ltd 309 West Zone, 3F. 49 Zhichun Road. Haidian District.}
		A	49.7.107.154^{🇨🇳 CHINA-149.7.64.0/18 China Telecom Beijing Co. Ltd.}
		A	101.227.168.54^{🇨🇳 SHANGHAITELECOM101.227.168.0/23 SHIDC}
		A	163.177.5.54^{🇨🇳 UNICOM-GuangZhou-IDC163.177.5.0/24}
		A	220.196.136.54^{🇨🇳 UNICOM-SHFT-IDC220.196.136.0/24}
NS	`ns4.dnsv3.com`
		A	2402:4e00:111:fff::e^{🇨🇳 TENCENT-NET-AP2402:4e00::/35}
		A	1.12.0.28^{🇨🇳 TENCENT-NET-AP-CN1.12.0.0/20 ZL-IDC-BOM}
		A	1.13.76.54^{🇨🇳 TENCENT-NET-AP1.13.64.0/18}
		A	43.134.249.55^{🇸🇬 TENCENT-NET-AP-CN43.134.224.0/19 ACEVILLE PTE.LTD. 16 COLLYER QUAY 18-29 INCOME AT RAFFLES}
		A	111.13.203.54^{🇨🇳 CHINAMOBILE-CN111.13.0.0/16 CMI (Customer Route)}
		A	117.135.128.154^{🇨🇳 CHINAMOBILE-CN117.135.128.0/24 CMI (Customer Route)}
			PTR	`(root)`
		A	124.64.205.154^{🇨🇳 CHINA169-BJ124.64.205.0/24}
		A	125.94.59.154^{🇨🇳 CHINANET-BACKBONE125.88.0.0/13 chinanet Guangdong network}
MX	`mxbiz1.qq.com` ⭐
		A	203.205.147.218^{🇭🇰 TENCENT-NET-AP-CN203.205.147.0/24 Proxy-registered route object}
		A	203.205.232.191^{🇭🇰 TENCENT-NET-AP-CN203.205.232.0/23 Proxy-registered route object}
MX	`mxbiz2.qq.com`⁽¹⁰⁾
		A	203.205.232.191^{🇭🇰 TENCENT-NET-AP-CN203.205.232.0/23 Proxy-registered route object}
SOA	`ns3.dnsv3.com`enterprise1dnsadmin@dnspod.com serial=1744788693

`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

WOT: UNKNOWN (61/100)

Same first word

521up.com

Similar names

u15p2.com

DNS History

8 records (5 active, 3 former)

○NSns1646.ztomy.com2015-06-24 → 2015-11-05 · 4 obs

● 2015-06-24 04:29:34
● 2015-11-05 01:13:54
○ 2016-02-01 05:23:26
○ 2026-02-26 12:07:14

○NSns2646.ztomy.com2015-06-24 → 2015-11-05 · 4 obs

● 2015-06-24 04:29:34
● 2015-11-05 01:13:54
○ 2016-02-01 05:23:26
○ 2026-02-26 12:07:14

●NSns3.dnsv3.com2016-04-24 → 2026-02-26 · 3 obs

○ 2016-02-01 05:23:26
● 2016-04-24 15:59:26
● 2026-02-26 12:07:14

●NSns4.dnsv3.com2016-04-24 → 2026-02-26 · 3 obs

○ 2016-02-01 05:23:26
● 2016-04-24 15:59:26
● 2026-02-26 12:07:14

●MXmxbiz1.qq.com2026-02-23 → 2026-02-26 · 2 obs

● 2026-02-23 09:41:06
● 2026-02-26 12:07:14

●MXmxbiz2.qq.com2026-02-23 → 2026-02-26 · 2 obs

● 2026-02-23 09:41:06
● 2026-02-26 12:07:14

●A123.206.65.1562026-02-23 → 2026-02-26 · 3 obs

○ 2016-02-01 05:23:26
● 2026-02-23 09:41:06
● 2026-02-26 12:07:14

○A141.8.226.142015-06-24 → 2015-11-05 · 4 obs

● 2015-06-24 04:29:34
● 2015-11-05 01:13:54
○ 2016-02-01 05:23:26
○ 2026-02-26 12:07:14

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
521up.com	ns3.dnsv3.com, ns4.dnsv3.com	17 records

✅ Authoritative Response

Server: 1.12.0.28

NS records: ns3.dnsv3.com, ns4.dnsv3.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for 521up.com (unsigned zone)

⏱️ Timing

Total: 222ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`123.206.65.156`
NS	2	`ns4.dnsv3.com, ns3.dnsv3.com`
MX	2	`mxbiz1.qq.com (pri: 5), mxbiz2.qq.com (pri: 10)`
SOA	1	`ns3.dnsv3.com enterprise1dnsadmin.dnspod`

📌 Glue Records Collected

Total: 17

Out-of-bailiwick: 17 (ns3.dnsv3.com, ns3.dnsv3.com, ns3.dnsv3.com...)

AI analysis

521up.com points to a single IP: 123.206.65.156.

521up.com's delegation is to two name servers ns3.dnsv3.com and ns4.dnsv3.com.

521up.com shares the same name server configuration as other domains, such as educity.cn, drip.im, mxcxzx.com, netinnet.cn and jpushoa.com.

521up.com at least partially shares its name servers with other domains, for instance 16fan.com, kingnet.com, 838wap.net, ickimg.com and yangfancn.com.