`acmcoder.com`

	CNAME	`20bjl54tu700f372.aliyunddos1013.com`
	DNSSEC	⚠️ Not signed
	A	203.107.46.110^{🇨🇳 Alibaba-Cloud203.107.46.0/24 Alibaba (US) Technology Co., Ltd.}

`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

exam.acmcoder.com

baidu.acmcoder.com

360.acmcoder.com

tz.acmcoder.com

Same first word

acmcoder.net

acmcoder.com.cn

acmcoder.cn

acmcoder.com

acmcoder.cc

Similar names

DNS History

12 records (6 active, 6 former)

○NSf1g1ns1.dnspod.net2015-11-26 → 2018-01-21 · 5 obs

○ 2015-08-07 17:32:20
● 2015-11-26 21:00:36
● 2018-01-21 03:50:12
○ 2026-02-24 16:55:56
○ 2026-03-15 20:19:28

○NSf1g1ns2.dnspod.net2015-11-26 → 2018-01-21 · 5 obs

○ 2015-08-07 17:32:20
● 2015-11-26 21:00:36
● 2018-01-21 03:50:12
○ 2026-02-24 16:55:56
○ 2026-03-15 20:19:28

○NSns2.east.net.cn2015-08-07 → 2015-08-07 · 3 obs

● 2015-08-07 17:32:20
○ 2015-11-26 21:00:36
○ 2026-03-15 20:19:28

●NSns3.dnsv4.com2026-02-24 → 2026-03-15 · 3 obs

○ 2018-01-21 03:50:12
● 2026-02-24 16:55:56
● 2026-03-15 20:19:28

●NSns4.dnsv4.com2026-02-24 → 2026-03-15 · 3 obs

○ 2018-01-21 03:50:12
● 2026-02-24 16:55:56
● 2026-03-15 20:19:28

●MXmxn.mxhichina.com2015-08-07 → 2026-03-15 · 2 obs

● 2015-08-07 17:32:20
● 2026-03-15 20:19:28

●MXmxw.mxhichina.com2015-08-07 → 2026-03-15 · 2 obs

● 2015-08-07 17:32:20
● 2026-03-15 20:19:28

○MXsmtp.career.acmcoder.com2015-08-07 → 2015-08-07 · 3 obs

● 2015-08-07 17:32:20
○ 2015-11-26 21:00:36
○ 2026-03-15 20:19:28

●MXsmtp.tz.acmcoder.com2015-11-26 → 2026-03-15 · 3 obs

○ 2015-08-07 17:32:20
● 2015-11-26 21:00:36
● 2026-03-15 20:19:28

○A101.201.170.2222018-01-21 → 2018-01-21 · 4 obs

○ 2016-03-08 08:27:46
● 2018-01-21 03:50:12
○ 2026-02-24 16:55:56
○ 2026-03-15 20:19:28

○A123.56.133.792015-08-07 → 2016-03-08 · 4 obs

● 2015-08-07 17:32:20
● 2016-03-08 08:27:46
○ 2018-01-21 03:50:12
○ 2026-03-15 20:19:28

●CNAME20bjl54tu700f372.aliyunddos1013.com2026-02-24 → 2026-03-15 · 2 obs

● 2026-02-24 16:55:56
● 2026-03-15 20:19:28

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	j.gtld-servers.net, l.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
acmcoder.com	ns3.dnsv4.com, ns4.dnsv4.com	18 records

✅ Authoritative Response

Server: 1.12.0.23

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for acmcoder.com (unsigned zone)

⏱️ Timing

Total: 1038ms | Queries: -

📄 Records

Type	Count	Sample Data
NS	2	`ns4.dnsv4.com, ns3.dnsv4.com`
MX	3	`mxn.mxhichina.com (pri: 5), mxw.mxhichina.com (pri: 10)...`
TXT	1	`v=spf1 include:spf1.dm.aliyun.com includ`
CNAME	1	`20bjl54tu700f372.aliyunddos1013.com`
SOA	1	`ns3.dnsv4.com enterprise2dnsadmin.dnspod`

📌 Glue Records Collected

Total: 18

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

Analysis

Hierarchy

acmcoder.com is a parent of exam.acmcoder.com, baidu.acmcoder.com, 360.acmcoder.com and tz.acmcoder.com.

IP Addresses

acmcoder.com points to a single IP: 203.107.46.110.

Other host names, such as 20bjl54tu700f372.aliyunddos1013.com, share IP numbers with acmcoder.com.

acmcoder.com - robtex.com

acmcoder.com

com