exam.nowcoder.com - dns.ninja

`exam.nowcoder.com`

	CNAME	`alb-btfrlo1jfu41wr200y.cn-hangzhou.alb.aliyuncs.com`
	DNSSEC	⚠️ Not signed
	A	47.114.84.106^{🇨🇳 Alibaba-Cloud47.114.0.0/17 Alibaba (US) Technology Co., Ltd.}
	A	116.62.46.60^{🇨🇳 Alibaba-Cloud116.62.0.0/17 China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District,}

`nowcoder.com`

	DNSSEC	⚠️ Not signed
	A	121.43.185.253^{🇨🇳 Alibaba-Cloud121.42.0.0/15}
	NS	`ns3.dnsv4.com` ⭐
	NS	`ns4.dnsv4.com`
	MX	`mxbiz1.qq.com` ⭐
	MX	`mxbiz2.qq.com`⁽¹⁰⁾
	TXT	`v=spf1 include:spf.mail.qq.com ~all`
	TXT	`aliyun-site-verification=036badcd-111f-405f-a715-99c01cc12372`
	TXT	`201706220000002efs425ud2ws6c2hynrjo3wcwk147dpqqow30ay9mkzpr6xd21`
	SOA	`ns3.dnsv4.com`enterprise2dnsadmin@dnspod.com serial=1781258218

rank #42039 globally
rank #20546 in the tld
📈 Tranco rank: #48,806

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DNS History

2 records (1 active, 1 former)

○A47.110.223.2302020-03-15 → 2021-04-03 · 4 obs

● 2020-03-15 09:39:16
● 2021-04-03 20:48:54
○ 2026-03-06 12:06:44
○ 2026-06-29 00:29:08

●CNAMEalb-btfrlo1jfu41wr200y.cn-hangzhou.alb.aliyuncs.com2026-03-06 → 2026-06-29 · 2 obs

● 2026-03-06 12:06:44
● 2026-06-29 00:29:08

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	m.gtld-servers.net, f.gtld-servers.net, b.gtld-servers.net, k.gtld-servers.net...	-
nowcoder.com	ns3.dnsv4.com, ns4.dnsv4.com	18 records

✅ Authoritative Response

Server:1.12.0.24

NS records: ns3.dnsv4.com, ns4.dnsv4.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for nowcoder.com (unsigned zone)

⏱️ Timing

Total: 1217ms | Queries: -

📄 Records

Type	Count	Sample Data
CNAME	1	`alb-btfrlo1jfu41wr200y.cn-hangzhou.alb.a`

📌 Glue Records Collected

Total: 18

Out-of-bailiwick: 18 (ns3.dnsv4.com, ns3.dnsv4.com, ns3.dnsv4.com...)

Analysis

IP Addresses

exam.nowcoder.com points to the IP addresses 47.114.84.106 and 116.62.46.60

alb-btfrlo1jfu41wr200y.cn-hangzhou.alb.aliyuncs.com, for instance, is one of the other host names sharing IP numbers with exam.nowcoder.com.