`openclasses.cn`

DNSSEC	⚠️ Not signed
A	154.221.133.58^{🇭🇰 DXTL-HK154.221.128.0/20 Proxy-registered route object}
NS	`ns1.nowcndns.com` ⭐
		A	1.193.216.204^{🇨🇳 CHINANET-Henan-Luoyang-IDC1.193.216.0/24 Chinatelecom HeNan Province Network}
			PTR	`ip-1-193-216-204.defastlink.net`
		A	218.98.111.129^{🇩🇪 HKCICL-AS-AP218.98.111.0/24 HONG KONG COMMUNICATIONS INTERNATIONAL CO.,LIMITED}
			PTR	`ip-218-98-111-129.defastlink.net`
		A	218.98.111.138^{🇩🇪 HKCICL-AS-AP218.98.111.0/24 HONG KONG COMMUNICATIONS INTERNATIONAL CO.,LIMITED}
			PTR	`ip-218-98-111-138.defastlink.net`
NS	`ns2.nowcndns.com`
		A	61.158.128.11^{🇨🇳 CHINA169-Backbone61.158.128.0/17 CNC Group CHINA169 Henan Province Network}
			PTR	`11.128.158.61.ha.cnc`
		A	183.253.57.202^{🇨🇳 CHINAMOBILE-CN183.253.0.0/16 CMI (Customer Route)}
			PTR	`ip-183-253-57-202.defastlink.net`
		A	211.99.99.38^{🇨🇳 DONGGUAN-1211.99.99.0/24 Proxy-registered route object}
			PTR	`ip-211-99-99-38.defastlink.net`
SOA	`ns1.nowcndns.com`admin@nowcndns.com serial=1760085886

`cn`

	DNSSEC	⚠️ Not signed
	NS	`a.dns.cn` ⭐ 🔒
	NS	`b.dns.cn`
	NS	`c.dns.cn` 🔒
	NS	`d.dns.cn` 🔒
	NS	`e.dns.cn` 🔒
	NS	`ns.cernet.net` ⚠️ Not in parent delegation
	SOA	`a.dns.cn`root@cnnic.cn serial=2034456417

openclasses.cn

openclasses.org

openclasses.info

lessonspace.org

10 records (3 active, 7 former)

○NSgo1.cdns.cn2015-12-07 → 2016-03-19 · 4 obs

● 2015-12-07 15:03:26
● 2016-03-19 12:31:56
○ 2016-07-14 20:17:16
○ 2026-02-27 13:54:56

○NSgo2.cdns.cn2015-12-07 → 2016-03-19 · 4 obs

● 2015-12-07 15:03:26
● 2016-03-19 12:31:56
○ 2016-07-14 20:17:16
○ 2026-02-27 13:54:56

○NSns1.22.cn2016-07-14 → 2016-07-14 · 4 obs

○ 2016-03-19 12:31:56
● 2016-07-14 20:17:16
○ 2017-04-21 02:53:02
○ 2026-02-27 13:54:56

●NSns1.nowcndns.com2026-02-16 → 2026-02-27 · 3 obs

○ 2017-04-21 02:53:02
● 2026-02-16 04:03:46
● 2026-02-27 13:54:56

○NSns2.22.cn2016-07-14 → 2016-07-14 · 4 obs

○ 2016-03-19 12:31:56
● 2016-07-14 20:17:16
○ 2017-04-21 02:53:02
○ 2026-02-27 13:54:56

●NSns2.nowcndns.com2026-02-16 → 2026-02-27 · 3 obs

○ 2017-04-21 02:53:02
● 2026-02-16 04:03:46
● 2026-02-27 13:54:56

○NSns3.22.cn2016-07-14 → 2016-07-14 · 4 obs

○ 2016-03-19 12:31:56
● 2016-07-14 20:17:16
○ 2017-04-21 02:53:02
○ 2026-02-27 13:54:56

○NSns4.22.cn2016-07-14 → 2016-07-14 · 4 obs

○ 2016-03-19 12:31:56
● 2016-07-14 20:17:16
○ 2017-04-21 02:53:02
○ 2026-02-27 13:54:56

○MXmx.freemail.icoremail.net2016-07-14 → 2016-07-14 · 3 obs

● 2016-07-14 20:17:16
○ 2017-04-21 02:53:02
○ 2026-02-27 13:54:56

●A154.221.133.582026-02-16 → 2026-02-27 · 2 obs

● 2026-02-16 04:03:46
● 2026-02-27 13:54:56

openclasses.cn points to a single IP: 154.221.133.58.

openclasses.cn's delegation is to two name servers ns1.nowcndns.com and ns2.nowcndns.com.

openclasses.cn shares the same name server configuration as other domains, such as jacksonpollock.cn, texilart.cn, gzmidea.cn, baiyifangzhi.gd.cn and heaq.com.cn.

Host names with three IP numbers