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Data as of Nov 6, 2026

173.203.0.0/17

No anonymizer space · no proxy exits in 30 days

Rackspace Hosting

Announcement
this exact prefix
No RPKI
Announced by
AS19994
Type
Hosting
Risk
50 / 100 · Medium

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
173.203.0.0/1665,536RSCP-NET-4Rackspace Hosting (RACKS-8) · USDirect AllocationOct 2, 2009abuse@rackspace.com
└ 173.203.0.0/221,024RSPC-1258471808347040Rackspace Backbone Engineering (C02394558) · USReassignedJan 4, 2010abuse@rackspace.com
via RSCP-NET-4
└ 173.203.4.0/25128RSPC-1255030570158029unknown———
└ 173.203.4.128/2732RSPC-1263835808355653unknown———
└ 173.203.4.176/298RSPC-1263403089280847unknown———
└ 173.203.4.192/2732RSPC-E25277B1-AF36-4E91-BE4C-B413CBE2F378unknown———
└ 173.203.4.240/298RACKS-8-1365780625041016unknown———
└ 173.203.4.248/298INTERNAL-CUSTOMER-01unknown———
└ 173.203.6.0/2664RSPC-82D6994E-D29F-4ED3-8BA2-51CBD5886FB2unknown———
└ 173.203.8.0/221,024RSPC-1260823328411239Cloud Sites (Formerly MOSSO) (C02394766) · USReassignedJan 4, 2010abuse@rackspace.com
via RSCP-NET-4
└ 173.203.12.32/298RACKS-8-1369763774290756unknown———
└ 173.203.12.48/298RACKS-8-1335345373477397unknown———
└ 173.203.12.64/298RSPC-5CB57611-1C3F-472C-9B04-DB4F07310C3Eunknown———
└ 173.203.12.96/298RACKS-8-1313759535537906unknown———
└ 173.203.12.160/298RSPC-1269192008114589unknown———
└ 173.203.12.216/298RSPC-1269354728332815unknown———
└ 173.203.12.232/298RSPC-D209A045-1A98-4987-A7FE-695DA3AA5AB4unknown———
└ 173.203.12.248/298RSPC-1269364208471367unknown———
└ 173.203.13.0/298RACKS-8-1386347295209961unknown———
└ 173.203.13.48/298RSPC-803565DC-CC33-4DA7-B4D2-B25097C8ADABunknown———
└ 173.203.13.64/298RSPC-1269453610805466unknown———
└ 173.203.13.72/298RACKS-8-1438092378632190unknown———
└ 173.203.13.80/298RSPC-1269614059027598unknown———
└ 173.203.13.88/298RSPC-1269636608411529unknown———
└ 173.203.13.96/298RACKS-8-1375840224171413unknown———
└ 173.203.13.152/298RACKS-8-1386353424232322unknown———
└ 173.203.13.200/298RSPC-0FC0830B-30D7-490F-A832-866A9DEDF57Funknown———
└ 173.203.13.216/298RACKS-8-1374183134980820unknown———
└ 173.203.14.8/298RSPC-A62E0077-1D58-42CE-8077-A6B11723BF6Eunknown———
└ 173.203.14.16/298RSPC-1270098489228010unknown———
└ 173.203.14.48/298RSPC-1270129088766804unknown———
└ 173.203.14.88/298RACKS-8-1407848057096052unknown———
└ 173.203.14.104/298RSPC-B56C864C-1DF9-411B-AE66-965D2EF6C6A8unknown———
└ 173.203.14.112/298RACKS-8-1305558012354363unknown———
└ 173.203.14.136/298RSPC-1270187049388358unknown———
└ 173.203.14.160/298RACKS-8-1462461223418253unknown———
└ 173.203.14.192/298RACKS-8-1385141775915121unknown———
└ 173.203.14.208/298RSPC-1270265409252140unknown———
└ 173.203.14.216/298RACKS-8-1360770024778477unknown———
└ 173.203.14.224/298RSPC-1270267329238812unknown———
└ 173.203.14.240/298RACKS-8-1307475851414246unknown———
└ 173.203.15.0/2816RSPC-8C266243-6444-45A3-B0C3-B03F8BFFFA0Cunknown———
└ 173.203.15.32/2816RACKS-8-1408031777288538unknown———
└ 173.203.15.80/2816RACKS-8-1370489774294715unknown———
└ 173.203.15.128/298RSPC-1270273209903483unknown———
└ 173.203.15.136/298RACKS-8-1423863857427240unknown———
└ 173.203.15.144/298RSPC-1270273928511529unknown———
└ 173.203.15.152/298RACKS-8-1423831233429259unknown———
└ 173.203.15.160/298RSPC-1270286289139967unknown———
└ 173.203.15.176/298RSPC-1270510089180988unknown———
└ 173.203.15.184/298RSPC-1270511528964648unknown———
└ 173.203.15.200/298RACKS-8-1423870234092578unknown———
└ 173.203.15.248/298RACKS-8-1441559779754530unknown———
└ 173.203.16.0/2816RSPC-1270149250701605unknown———
└ 173.203.16.16/2816RACKS-8-1374510493936510unknown———
└ 173.203.16.80/2816RSPC-29E40E57-CCC5-48C6-B0B0-5BDF552F99BBunknown———
└ 173.203.16.176/2816RACKS-8-1438884665879634unknown———
└ 173.203.16.208/2816RACKS-8-1415977696221623unknown———
└ 173.203.17.128/298RSPC-4DA6BC3E-91B4-4F85-859E-01D8794B8D3Funknown———
└ 173.203.17.152/298RACKS-8-1335368534352874unknown———
└ 173.203.17.160/298RSPC-0620D343-D945-4AF8-8525-750E0953D44Eunknown———
└ 173.203.17.176/298RACKS-8-1386334935464595unknown———
└ 173.203.17.184/298RSPC-1272543965612485unknown———
└ 173.203.17.224/298RACKS-8-1444836260158710unknown———
└ 173.203.18.16/298RACKS-8-1438110270542400unknown———
└ 173.203.18.24/298RACKS-8-1386029293821104unknown———
└ 173.203.18.32/298RACKS-8-1424004736228217unknown———
└ 173.203.18.48/298RSPC-1270798928061431unknown———
└ 173.203.18.56/298RACKS-8-1405550774495359unknown———
└ 173.203.18.80/298RSPC-878722EB-A118-4F59-B3A6-A0B400222E5Eunknown———
└ 173.203.18.104/298RACKS-8-1441046455945169unknown———
└ 173.203.18.120/298RSPC-1271180768335661unknown———
└ 173.203.18.128/298RACKS-8-1441560138544792unknown———
└ 173.203.18.144/298RACKS-8-1361811375083406unknown———
└ 173.203.18.152/298RACKS-8-1383665773598537unknown———
└ 173.203.18.160/298RACKS-8-1451401937578214unknown———
└ 173.203.18.184/298RACKS-8-1424012896378634unknown———
└ 173.203.18.192/298RACKS-8-1386366374394156unknown———
└ 173.203.18.248/298RSPC-1271429408249674unknown———
└ 173.203.19.16/298RACKS-8-1441050055393192unknown———
└ 173.203.19.40/298RACKS-8-1385158455300000unknown———
└ 173.203.19.80/298RSPC-1271893924644556unknown———
└ 173.203.19.120/298RSPC-1272117485543691unknown———
└ 173.203.19.128/298RSPC-1272118805685073unknown———
└ 173.203.19.144/298RSPC-1272132124687929unknown———
└ 173.203.20.0/2816RSPC-1272038526790118unknown———
└ 173.203.20.16/2816RSPC-1272449165763899unknown———
└ 173.203.20.48/2816RSPC-1272581045597138unknown———
└ 173.203.20.144/2816RACKS-8-1444943058132744unknown———
└ 173.203.20.160/2816RACKS-8-1442600667140428unknown———
└ 173.203.20.192/2816RSPC-B5D066A9-5ECF-4F16-9602-D49DB849851Cunknown———
└ 173.203.20.224/2816RSPC-1273083605162792unknown———
└ 173.203.21.0/2816RSPC-1273260125785859unknown———
└ 173.203.21.16/2816RSPC-1273484405404057unknown———
└ 173.203.21.32/2816RSPC-E5177222-457A-49D2-9B99-856A219578ADunknown———
└ 173.203.21.64/2816RSPC-EC260DA5-7AF6-4D08-990D-40EAF34F129Funknown———
└ 173.203.21.80/2816RSPC-1274109245800733unknown———
└ 173.203.21.96/2816RSPC-1274109365606506unknown———
└ 173.203.21.112/2816RACKS-8-1319813532008571unknown———
└ 173.203.21.128/2816RACKS-8-1383093735493027unknown———
└ 173.203.21.160/2816RACKS-8-1274316605614465unknown———
└ 173.203.21.208/2816RACKS-8-1274198647294573unknown———
└ 173.203.21.224/2816RACKS-8-1274198532698122unknown———
└ 173.203.21.240/2816RACKS-8-1274198527767047unknown———
└ 173.203.22.0/298RACKS-8-1415309658552374unknown———
└ 173.203.22.8/298RSPC-82A803E7-042D-41DA-A382-354F69AA2E6Eunknown———
└ 173.203.22.16/298RSPC-1272940085916377unknown———
└ 173.203.22.32/298RSPC-1272995885179577unknown———
└ 173.203.22.48/298RSPC-1273026605442911unknown———
└ 173.203.22.88/298RSPC-1273074365685697unknown———
└ 173.203.22.96/298RSPC-17CA3B02-9AB2-4F64-97D3-C67ED1DAA5F3unknown———
└ 173.203.22.112/298RSPC-1273098965052613unknown———
└ 173.203.22.120/298RSPC-1273112644453274unknown———
└ 173.203.22.128/298RACKS-8-1438177468224966unknown———
└ 173.203.22.176/298RACKS-8-1368985824160419unknown———
└ 173.203.22.192/298RSPC-1273243564185546unknown———
└ 173.203.22.208/298RACKS-8-1386030625482673unknown———
└ 173.203.22.216/298RACKS-8-1360607893112731unknown———
└ 173.203.22.224/298RSPC-1273485005729289unknown———
└ 173.203.22.232/298RSPC-1273266364795216unknown———
└ 173.203.22.240/298RACKS-8-1315325054925450unknown———
└ 173.203.23.16/298RSPC-7ED674AF-65C3-464C-9527-57A606E10300unknown———
└ 173.203.23.48/298RSPC-1273619284191947unknown———
└ 173.203.23.64/298RACKS-8-1386260534527490unknown———
└ 173.203.23.72/298RACKS-8-1386363855890062unknown———
└ 173.203.23.128/298RSPC-1273782965258702unknown———
└ 173.203.23.144/298RACKS-8-1438201941763862unknown———
└ 173.203.23.152/298RACKS-8-1438263739140843unknown———
└ 173.203.23.184/298RSPC-1273964405347853unknown———
└ 173.203.23.208/298RACKS-8-1309607055421793unknown———
└ 173.203.23.224/298RSPC-1274124844699250unknown———
└ 173.203.23.232/298RACKS-8-1457476577999710unknown———
└ 173.203.23.248/298RSPC-D6CD158C-65CC-4034-8FB6-117A22F86B71unknown———
└ 173.203.24.8/298RACKS-8-1274198285606422unknown———
└ 173.203.24.24/298RACKS-8-1409859032809382unknown———
└ 173.203.24.64/298RACKS-8-1274198649748645unknown———
└ 173.203.24.96/298RACKS-8-1424103033374559unknown———
└ 173.203.24.104/298RACKS-8-1386258625524481unknown———
└ 173.203.24.112/298RACKS-8-1434031097058776unknown———
└ 173.203.24.144/298RACKS-8-1424107836429495unknown———
└ 173.203.24.152/298RACKS-8-1274366284090308unknown———
└ 173.203.24.168/298RACKS-8-1447947738981480unknown———
└ 173.203.24.176/298RACKS-8-1335303132739627unknown———
└ 173.203.24.192/298RACKS-8-1386366626848669unknown———
└ 173.203.24.200/298RACKS-8-1386368535479298unknown———
└ 173.203.25.0/2664RACKS-8-1360592667774725unknown———
└ 173.203.25.96/2816RSPC-1CF686BB-40C2-4198-BB9B-C47729770E91unknown———
└ 173.203.25.112/2816RACKS-8-1364926694141181unknown———
└ 173.203.25.128/2732RSPC-976C589E-179F-4AD5-92EE-96CB687B1989unknown———
└ 173.203.25.192/2732RACKS-8-1305675731345317unknown———
└ 173.203.26.16/298RACKS-8-1335821418362156unknown———
└ 173.203.26.32/298RACKS-8-1386403095679926unknown———
└ 173.203.26.72/298RACKS-8-1463761579966825unknown———
└ 173.203.26.80/298RACKS-8-1274853485994999unknown———
└ 173.203.26.96/298RACKS-8-1274872444601090unknown———
└ 173.203.26.104/298RACKS-8-1335983294636967unknown———
└ 173.203.26.136/298RACKS-8-1438375937126125unknown———
└ 173.203.26.168/298RACKS-8-1274995325211063unknown———
└ 173.203.26.184/298RACKS-8-1275053645731761unknown———
└ 173.203.26.200/298RACKS-8-1275065171465364unknown———
└ 173.203.26.216/298RACKS-8-1275147244268716unknown———
└ 173.203.26.224/298RACKS-8-1275193445336524unknown———
└ 173.203.26.232/298RACKS-8-1386339255811480unknown———
└ 173.203.27.0/298RSPC-BB1D435B-6B06-4AF6-BF62-30CCFED827A1unknown———
└ 173.203.27.8/298RACKS-8-1424272697915903unknown———
└ 173.203.27.24/298RACKS-8-1415469376650121unknown———
└ 173.203.27.56/298RACKS-8-1306753931579995unknown———
└ 173.203.27.64/298RACKS-8-1390277655352301unknown———
└ 173.203.27.72/298RACKS-8-1275497164429832unknown———
└ 173.203.27.104/298RACKS-8-1335254053720350unknown———
└ 173.203.27.128/298RACKS-8-1406313855130581unknown———
└ 173.203.27.144/298RACKS-8-1335897975227467unknown———
└ 173.203.27.160/298RACKS-8-1275597125345779unknown———
└ 173.203.27.176/298RACKS-8-1275597365396571unknown———
└ 173.203.27.224/298RACKS-8-1275774245655125unknown———
└ 173.203.27.232/298RACKS-8-1304969770128863unknown———
└ 173.203.27.240/298RACKS-8-1275850325231702unknown———
└ 173.203.30.0/24256RACKS-8-1275586805963841unknown———
└ 173.203.31.8/298RACKS-8-1277502725480731unknown———
└ 173.203.31.24/298RACKS-8-1424538137045893unknown———
└ 173.203.31.40/298RACKS-8-1395370096308919unknown———
└ 173.203.31.72/298RACKS-8-1277797085749340unknown———
└ 173.203.31.88/298RACKS-8-1277836925824926unknown———
└ 173.203.31.136/298RACKS-8-1438631449485159unknown———
└ 173.203.31.144/298RACKS-8-1277832485524258unknown———
└ 173.203.31.152/298RACKS-8-1277846885773866unknown———
└ 173.203.31.160/298RACKS-8-1277853845174392unknown———
└ 173.203.31.192/298RACKS-8-1386046224908547unknown———
└ 173.203.31.208/298RACKS-8-1424730137104786unknown———
└ 173.203.31.240/298RACKS-8-1439335255882329unknown———
└ 173.203.31.248/298RACKS-8-1386532334148834unknown———
└ 173.203.32.0/25128RACKS-8-1360592675667984unknown———
└ 173.203.32.128/2664RSPC-1265041568005125unknown———
└ 173.203.32.192/2732RACKS-8-1405903694711194unknown———
└ 173.203.32.240/2816RSPC-1260283808618831unknown———
└ 173.203.33.0/2664RACKS-8-1404331096694507unknown———
└ 173.203.33.64/2664RACKS-8-1406565027902504unknown———
└ 173.203.33.128/2664RACKS-8-1406565137270329unknown———
└ 173.203.34.0/2816RSPC-1260285127910855unknown———
└ 173.203.34.32/2732RSPC-1265829128181450unknown———
└ 173.203.34.96/2732RACKS-8-1457724257798236unknown———
← Previous1–200 of 340 · page 1 of 2Next →

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

AS19994

US
Name
Rackspace Hosting
Type
Hosting
Registered
Jan 15, 2010
Domain
rackspace.com
Industry
Hosting and Cloud Provider
Spamhaus ASN-DROP
not listed