Summary
Incoming mail for
*.21cn.net is handled by one mailserver having a total of four IP numbers. All of them are on the same IP network.
vnet.cn,
21cn.net,
cdn1.21cn.net,
news.21cn.net,
ns2`.21cn.net and at least five other hosts share mailservers with this domain.
21cn.net is delegated to three nameservers, however all three delegated nameservers are missing in the zone and one other nameserver is listed. All nameservers are having a total of four IP numbers. There are two duplicated IP numbers. Some of them are on the same IP network. Incoming mail for
21cn.net is handled by one mailserver having a total of four IP numbers. All of them are on the same IP network.
21cn.net has one IP number.
| base | record | name | ip | reverse | route | as |
| *.21cn.net | mx | 10 | mta.21cn.net | 59.36.102.86 China | (none) | 59.32.0.0/13 China Telecom Guangdong province | AS4134 CHINA-TELECOM China Telecom |
| 59.36.102.87 China |
| 59.36.102.88 China |
| 59.36.102.89 China |
| 59.36.102.86 China |
| 59.36.102.87 China |
| 59.36.102.88 China |
| 59.36.102.89 China |
| 21cn.net | a | 121.14.129.213 China | (none) | 121.8.0.0/13 From Guangdong Network of ChinaTelecom |
| ns-soa | cdnns.21cn.com | 218.107.61.49 China | cdnns2.21cn.com | 218.107.56.0/21 | AS17622 CNCGROUP-GZ CNCGROUP IP network of GuangZhou region MAN network |
| 58.211.81.95 China | (none) | 58.208.0.0/12 China Telecom JiangSu province | AS4134 CHINA-TELECOM China Telecom |
| 59.36.102.160 China | 59.32.0.0/13 China Telecom Guangdong province |
| ns | cdnns4.21cn.com (only in delegation) | 59.36.102.160 China | (none) |
| cdnns5.21cn.com (only in delegation) | | | ? |
| cdnns.21cn.com (only in zone) | 218.107.61.49 China | cdnns2.21cn.com | 218.107.56.0/21 | AS17622 CNCGROUP-GZ CNCGROUP IP network of GuangZhou region MAN network |
| 58.211.81.95 China | (none) | 58.208.0.0/12 China Telecom JiangSu province | AS4134 CHINA-TELECOM China Telecom |
| 59.36.102.160 China | 59.32.0.0/13 China Telecom Guangdong province |
| cdnns2.21cn.com (only in delegation) | 218.107.61.49 China | 218.107.56.0/21 | AS17622 CNCGROUP-GZ CNCGROUP IP network of GuangZhou region MAN network |
| mx | 10 | mta.21cn.net | 59.36.102.86 China | (none) | 59.32.0.0/13 China Telecom Guangdong province | AS4134 CHINA-TELECOM China Telecom |
| 59.36.102.87 China |
| 59.36.102.88 China |
| 59.36.102.89 China |
| net | ns-soa | a.gtld-servers.net | 192.5.6.30 United States | 192.5.6.0/24 VeriSign Route | AS36625 VERISIGN-AS VeriSign, Inc |
| ns | a.gtld-servers.net | 192.5.6.30 United States |
| b.gtld-servers.net | 192.33.14.30 United States | 192.33.14.0/24 VeriSign Route | AS26415 VERISIGN-AS VeriSign, Inc |
| c.gtld-servers.net | 192.26.92.30 United States | 192.26.92.0/24 VeriSign Route | AS36625 VERISIGN-AS VeriSign, Inc |
| d.gtld-servers.net | 192.31.80.30 United States | 192.31.80.0/24 VeriSign Route | AS36617 VERISIGN-AS VeriSign, Inc |
| e.gtld-servers.net | 192.12.94.30 United States | 192.12.94.0/24 VeriSign Route | AS36629 VERISIGN-AS VeriSign, Inc |
| f.gtld-servers.net | 192.35.51.30 United States | 192.35.51.0/24 VeriSign Route | AS36620 VERISIGN-AS VeriSign, Inc |
| g.gtld-servers.net | 192.42.93.30 United States | 192.42.93.0/24 VeriSign Route | AS36624 VERISIGN-AS VeriSign, Inc |
| h.gtld-servers.net | 192.54.112.30 United States | 192.54.112.0/24 VeriSign Route | AS36623 VERISIGN-AS VeriSign, Inc |
| i.gtld-servers.net | 192.43.172.30 United States | 192.43.172.0/24 VeriSign Route | AS36625 VERISIGN-AS VeriSign, Inc |
| j.gtld-servers.net | 192.48.79.30 United States | 192.48.79.0/24 VeriSign Route | AS36626 VERISIGN-AS VeriSign, Inc |
| k.gtld-servers.net | 192.52.178.30 United States | 192.52.178.0/24 VeriSign Route | AS36622 VERISIGN-AS VeriSign, Inc |
| l.gtld-servers.net | 192.41.162.30 United States | 192.41.162.0/24 VeriSign Route | AS36628 VERISIGN-AS VeriSign, Inc |
| m.gtld-servers.net | 192.55.83.30 United States | 192.55.83.0/24 VeriSign Route | AS36618 VERISIGN-AS VeriSign, Inc |