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Data as of Nov 10, 2026

221.239.53.0/24

No anonymizer space · no proxy exits in 30 days

ASN for TIANJIN Provincial Net of CT · space held by Chinanet Tianjin Province Network

Announcement
this exact prefix
RPKI valid
Announced by
AS17638
Type
Residential
Risk
0 / 100 · Low

Announcements

Less specific

Covering announcements

PrefixOriginTypeProxy exitsHolderRPKI
221.239.0.0/18
since May 2005
AS17638Residential17
1 always on
Chinanet Tianjin Province Network

Registrations in this block

The registry's network records over the announcement: those covering it, widest first, then every record inside it, under its parent.

RangeAddressesNetnameHolderTypeCreatedAbuse contact
221.238.0.0 - 221.239.127.25598,304CHINANET-TJChinanet Tianjin Province NetworkALLOCATED PORTABLE—anti-spam@chinatelecom.cn
└ 221.239.53.28/304TIANJIN-WANSHUNLIJING-LTDunknownASSIGNED NON-PORTABLE—anti-spam@chinatelecom.cn
via CHINANET-TJ
└ 221.239.53.56/304TIANJIN-WANSHUNLIJING-LTDunknownASSIGNED NON-PORTABLE—anti-spam@chinatelecom.cn
via CHINANET-TJ
└ 221.239.53.60/304TIANJIN-XINGZHENGXUKEZHONGXIN-LTDunknownASSIGNED NON-PORTABLE—baijian.tj@chinatelecom.cn
└ 221.239.53.84/304TIANJIN-TIANJINCHANGKUAN-LTDunknownASSIGNED NON-PORTABLE—baijian.tj@chinatelecom.cn
└ 221.239.53.92/304TIANJIN-BOHAIZHENGQUAN-LTDunknownASSIGNED NON-PORTABLE—anti-spam@chinatelecom.cn
via CHINANET-TJ
└ 221.239.53.104/304TIANJIN-FUCHANGDIANZI-LTDFUCHANGDIANZI-LTD.ASSIGNED NON-PORTABLE—anti-spam@chinatelecom.cn
via CHINANET-TJ
└ 221.239.53.108/304TIANJIN-BOHAIZHUANGSHICHENG-LTDBOHAIZHUANGSHICHENG-LTD.ASSIGNED NON-PORTABLE—anti-spam@chinatelecom.cn
via CHINANET-TJ
└ 221.239.53.132/304TIANJIN-ZHILIANDA-LTDunknownASSIGNED NON-PORTABLE—anti-spam@chinatelecom.cn
via CHINANET-TJ
└ 221.239.53.136/304TIANJIN-TIANJINCHANGCHENGKUANDAI-NETWORKunknownASSIGNED NON-PORTABLE—anti-spam@chinatelecom.cn
via CHINANET-TJ
└ 221.239.53.140/304TIANJIN-LANZUANDASHA-LTDunknownASSIGNED NON-PORTABLE—anti-spam@chinatelecom.cn
via CHINANET-TJ
└ 221.239.53.144/298TIANJIN-GUANGBODIANSHI-LTDunknownASSIGNED NON-PORTABLE—baijian.tj@chinatelecom.cn
└ 221.239.53.148/304TIANJIN-TIANXINTONG-NETWORKunknownASSIGNED NON-PORTABLE—baijian.tj@chinatelecom.cn
via TIANJIN-GUANGBODIANSHI-LTD
└ 221.239.53.152/298TIANJIN-WEISITUO-LTDunknownASSIGNED NON-PORTABLE—anti-spam@chinatelecom.cn
via CHINANET-TJ
└ 221.239.53.160/298TIANJIN-LAOBAIXINGDAYAOFANG-LTDunknownASSIGNED NON-PORTABLE—baijian.tj@chinatelecom.cn
└ 221.239.53.168/298TIANJIN-TIYUXUEYUAN-COLLEGEunknownASSIGNED NON-PORTABLE—anti-spam@chinatelecom.cn
via CHINANET-TJ
└ 221.239.53.176/298TIANJIN-SHIJIAZHUANGSHANGYE-BANKunknownASSIGNED NON-PORTABLE—baijian.tj@chinatelecom.cn
└ 221.239.53.184/298TIANJIN-XINGCHEN-NETBARunknownASSIGNED NON-PORTABLE—anti-spam@chinatelecom.cn
via CHINANET-TJ
└ 221.239.53.196/304TIANJIN-XIAOFANGYANJIUSUO-GOVunknownASSIGNED NON-PORTABLE—anti-spam@chinatelecom.cn
via CHINANET-TJ
└ 221.239.53.200/298TIANJIN-XINHONGWEI-LTDunknownASSIGNED NON-PORTABLE—baijian.tj@chinatelecom.cn
└ 221.239.53.208/2816TIANJIN-CHANQUANJIAOYIZHONGXIN-LTDCHANQUANJIAOYIZHONGXIN-LTD.ASSIGNED NON-PORTABLE—anti-spam@chinatelecom.cn
via CHINANET-TJ
└ 221.239.53.224/2816TIANJIN-CHANQUANJIAOYIZHONGXIN-LTDCHANQUANJIAOYIZHONGXIN-LTD.ASSIGNED NON-PORTABLE—anti-spam@chinatelecom.cn
via CHINANET-TJ
└ 221.239.53.240/2816TIANJIN-FEISIKAER-LTDFEISIKAER-LTD.ASSIGNED NON-PORTABLE—anti-spam@chinatelecom.cn
via CHINANET-TJ

A contact marked “via” is the registry's: the record names none of its own, so the registry hands down its parent's.

Network & registry

AnnouncementRouting historyRPKI & IRRWhois & abuse
Origin network

AS17638

CN
Name
ASN for TIANJIN Provincial Net of CT
Type
Internet provider
Registered
Nov 18, 2002
Domain
cndata.com
Industry
Computer and Information Technology
Spamhaus ASN-DROP
not listed