`it300.com`

DNSSEC	⚠️ Not signed
A	47.57.100.251^{🇭🇰 Alibaba-Cloud47.57.0.0/16 Proxy-registered route object}
NS	`ns11.bigwww.com` ⭐
		A	2408:4009:501::9^{🇨🇳 Alibaba-Cloud2408:4009:501::/48}
		A	39.96.153.43^{🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC}
		A	47.118.199.203^{🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd.}
NS	`ns12.bigwww.com`
		A	2408:4009:501::10^{🇨🇳 Alibaba-Cloud2408:4009:501::/48}
		A	120.76.107.43^{🇨🇳 Alibaba-Cloud120.76.0.0/17}
		A	139.224.142.113^{🇨🇳 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	`ns13.bigwww.com` ⚠️ Not in zone NS records
		A	47.118.199.203^{🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd.}
NS	`ns14.bigwww.com` ⚠️ Not in zone NS records
		A	139.224.142.113^{🇨🇳 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	`ns15.bigwww.com` ⚠️ Not in zone NS records
		A	39.96.153.43^{🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC}
NS	`ns16.bigwww.com` ⚠️ Not in zone NS records
		A	120.76.107.43^{🇨🇳 Alibaba-Cloud120.76.0.0/17}
SOA	`ns11.bigwww.com`hostmaster@hichina.com 2026-01-12 #9

`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=1774671492

Same first word

it300.com.cn

it300.com

Similar names

030it.com

it003.com

DNS History

8 records (7 active, 1 former)

●NSns11.bigwww.com2015-08-05 → 2026-03-28 · 2 obs

● 2015-08-05 01:51:16
● 2026-03-28 04:21:26

●NSns12.bigwww.com2026-03-28 → 2026-03-28 · 2 obs

○ 2015-08-05 01:51:16
● 2026-03-28 04:21:26

●NSns13.bigwww.com2026-03-28 → 2026-03-28 · 2 obs

○ 2015-08-05 01:51:16
● 2026-03-28 04:21:26

●NSns14.bigwww.com2026-03-28 → 2026-03-28 · 2 obs

○ 2015-08-05 01:51:16
● 2026-03-28 04:21:26

●NSns15.bigwww.com2026-03-28 → 2026-03-28 · 2 obs

○ 2015-08-05 01:51:16
● 2026-03-28 04:21:26

●NSns16.bigwww.com2026-03-28 → 2026-03-28 · 2 obs

○ 2015-08-05 01:51:16
● 2026-03-28 04:21:26

○A116.255.219.2422015-08-05 → 2017-12-07 · 3 obs

● 2015-08-05 01:51:16
● 2017-12-07 09:00:48
○ 2026-03-28 04:21:26

●A47.57.100.2512026-03-28 → 2026-03-28 · 2 obs

○ 2017-12-07 09:00:48
● 2026-03-28 04:21:26

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	i.gtld-servers.net, k.gtld-servers.net, h.gtld-servers.net, m.gtld-servers.net...	-
it300.com	ns11.bigwww.com, ns12.bigwww.com, ns13.bigwww.com, ns14.bigwww.com...	10 records

✅ Authoritative Response

Server:39.96.153.43

NS records: ns11.bigwww.com, ns12.bigwww.com, ns13.bigwww.com, ns14.bigwww.com, ns15.bigwww.com, ns16.bigwww.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for it300.com (unsigned zone)

⏱️ Timing

Total: 671ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`47.57.100.251`
NS	2	`ns11.bigwww.com, ns12.bigwww.com`
SOA	1	`ns11.bigwww.com hostmaster.hichina.com`

📌 Glue Records Collected

Total: 10

Out-of-bailiwick: 10 (ns11.bigwww.com, ns11.bigwww.com, ns11.bigwww.com...)

Analysis

IP Addresses

it300.com points to a single IP: 47.57.100.251.

Name Servers

it300.com is delegated to six name servers: ns11.bigwww.com, ns12.bigwww.com, ns13.bigwww.com, ns14.bigwww.com, ns15.bigwww.com and ns16.bigwww.com.

it300.com partially shares name servers with other domains; examples include quezhou.com, ff87.com, hnteamtop.com, hugeepay.com and pldmc.cn.