Data as of Nov 10, 2026

166.78.192.0/18

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.

Range	Addresses	Netname	Holder	Type	Created	Abuse contact
166.78.0.0/16	65,536	RACKS-8-NET-11	Rackspace Hosting (RACKS-8) · US	Direct Allocation	Oct 17, 2012	abuse@rackspace.com
└ 166.78.223.44/30	4	RSPC-096E4EC7-F81B-4BAB-9058-54DE5EC3F707	unknown	—	—	—
└ 166.78.223.52/31	2	RSPC-C4255234-0C18-4B70-ACD0-5E8CBE806879	unknown	—	—	—
└ 166.78.223.58/31	2	RSPC-B0490EE5-1F28-4DD7-89F7-E6CF8E06C2BA	unknown	—	—	—
└ 166.78.223.60/30	4	RSPC-A12C71F2-4559-4215-B137-D1051B9B09C1	unknown	—	—	—
└ 166.78.223.72/30	4	RSPC-370F966C-725F-4E5A-82B1-9E27D52EEB3D	unknown	—	—	—
└ 166.78.223.76/30	4	RSPC-BFAFD941-5413-45A2-A8A4-3C6C79643CB9	unknown	—	—	—
└ 166.78.223.80/30	4	RSPC-C8608517-AA9B-4067-A97F-21108A9192B6	unknown	—	—	—
└ 166.78.223.84/30	4	RSPC-A8F62C6E-BB68-494A-A9D7-B6EA8FAC8E3B	unknown	—	—	—
└ 166.78.223.88/30	4	RSPC-39246F83-3B44-40F8-A60B-D65A0EC84E04	unknown	—	—	—
└ 166.78.223.104/31	2	RSPC-FA0EFD16-C77F-4B5C-896F-680A81C6DEFD	unknown	—	—	—
└ 166.78.223.120/31	2	RSPC-30B9EF0B-A48D-4F92-8100-7426D419BC6A	unknown	—	—	—
└ 166.78.223.124/30	4	RSPC-81370037-2A38-4E35-92E8-5595E6634BDE	unknown	—	—	—
└ 166.78.223.128/30	4	RSPC-C0E1E510-74DB-46CB-B68E-6FE448C1A4A1	unknown	—	—	—
└ 166.78.223.132/31	2	RSPC-E899C188-EE9D-4575-B568-AA1E94F843F2	unknown	—	—	—
└ 166.78.223.138/31	2	RSPC-01D674D7-5B53-4513-8169-8C7DAEB2DDF1	unknown	—	—	—
└ 166.78.223.140/30	4	RSPC-3B6425B2-5CDB-4AA8-8382-2033E3F549E7	unknown	—	—	—
└ 166.78.223.160/30	4	RSPC-F66F0DE0-7A9A-42B1-8832-AD01FD85CCBE	unknown	—	—	—
└ 166.78.223.164/31	2	RSPC-A00DB961-C2F1-422D-9507-FFD5135597E8	unknown	—	—	—
└ 166.78.223.168/30	4	RSPC-E3A98E0A-0AC6-4B24-AEFB-833F4EE13769	unknown	—	—	—
└ 166.78.223.176/30	4	RSPC-2456D640-0CCD-4371-B138-B7DB4CE785FD	unknown	—	—	—
└ 166.78.223.180/30	4	RSPC-026EDC55-90EE-4600-B200-6C0130CB06F7	unknown	—	—	—
└ 166.78.223.192/30	4	RSPC-CE385B78-831E-4382-A592-948BEC4E661D	unknown	—	—	—
└ 166.78.223.200/30	4	RSPC-A374E7F9-EC26-4190-BE2E-713741EA0230	unknown	—	—	—
└ 166.78.223.204/30	4	RSPC-6260116C-02E5-4DD3-8184-6A346ED5F4B5	unknown	—	—	—
└ 166.78.223.208/31	2	RSPC-80074D9E-155F-4371-9028-8D1DCEA09398	unknown	—	—	—
└ 166.78.223.212/30	4	RSPC-A56A5773-8247-4512-8E4D-69D2ADD8D940	unknown	—	—	—
└ 166.78.223.220/30	4	RSPC-DDBD2A0A-5900-4308-A158-B5448C1F571D	unknown	—	—	—
└ 166.78.223.246/31	2	RSPC-02B85432-970D-47E3-AB66-6B0155DFC7A0	unknown	—	—	—
└ 166.78.223.252/30	4	RSPC-AB0E360C-72E4-4B17-B98A-940204263D8A	unknown	—	—	—
└ 166.78.224.0/30	4	RACKS-8-1360098495687468	unknown	—	—	—
└ 166.78.224.4/30	4	RACKS-8-1454683580310196	unknown	—	—	—
└ 166.78.224.8/30	4	RACKS-8-1360099095335062	unknown	—	—	—
└ 166.78.224.16/30	4	RSPC-9F6E7D93-F18B-4DD1-8C74-825452B902FC	unknown	—	—	—
└ 166.78.224.20/30	4	RACKS-8-1427300435261711	unknown	—	—	—
└ 166.78.224.24/30	4	RSPC-C09817AA-440B-456F-BE2F-1D1371AE1F00	unknown	—	—	—
└ 166.78.224.28/30	4	RACKS-8-1360113135773508	unknown	—	—	—
└ 166.78.224.36/31	2	RSPC-2D9EF4C5-7A0D-4254-A14E-3B40F1144367	unknown	—	—	—
└ 166.78.224.44/30	4	RACKS-8-1360177094516664	unknown	—	—	—
└ 166.78.224.72/29	8	RACKS-8-1360192097226970	unknown	—	—	—
└ 166.78.224.80/30	4	RACKS-8-1456516577080520	unknown	—	—	—
└ 166.78.224.88/29	8	RACKS-8-1360202178119393	unknown	—	—	—
└ 166.78.224.96/29	8	RSPC-1D8714FE-A202-4D32-B90C-CB1A985F9E66	unknown	—	—	—
└ 166.78.224.108/30	4	RACKS-8-1360250054823771	unknown	—	—	—
└ 166.78.224.128/30	4	RACKS-8-1400560935763037	unknown	—	—	—
└ 166.78.224.136/29	8	RACKS-8-1400576896024087	unknown	—	—	—
└ 166.78.224.144/29	8	RACKS-8-1400591895517968	unknown	—	—	—
└ 166.78.224.152/29	8	RACKS-8-1400599097517560	unknown	—	—	—
└ 166.78.224.160/29	8	RACKS-8-1400600428292345	unknown	—	—	—
└ 166.78.224.168/30	4	RACKS-8-1400603175804995	unknown	—	—	—
└ 166.78.224.176/31	2	RACKS-8-1400618296531891	unknown	—	—	—
└ 166.78.224.178/31	2	INTERNAL-CUSTOMER-01	unknown	—	—	—
└ 166.78.224.180/31	2	RACKS-8-1449614441307512	unknown	—	—	—
└ 166.78.224.182/31	2	RSPC-B7023014-A355-4FB3-A31B-B6875200171F	unknown	—	—	—
└ 166.78.224.208/29	8	RACKS-8-1400701576087253	unknown	—	—	—
└ 166.78.224.216/30	4	RACKS-8-1400709027838188	unknown	—	—	—
└ 166.78.224.220/30	4	RACKS-8-1400764577932888	unknown	—	—	—
└ 166.78.224.224/30	4	RACKS-8-1400768295791016	unknown	—	—	—
└ 166.78.224.232/30	4	RSPC-BB0428B8-08DF-42E4-BC25-0BDC7BFBCAB0	unknown	—	—	—
└ 166.78.224.236/30	4	RSPC-4C7393FF-6E7F-43C6-8EDA-ADB1DA69E953	unknown	—	—	—
└ 166.78.225.8/30	4	RSPC-09B1599B-198E-4294-AFEE-EBE0DD4048CD	unknown	—	—	—
└ 166.78.225.12/30	4	RSPC-75AC2682-FCE7-4624-B5D5-091CA57DAC13	unknown	—	—	—
└ 166.78.225.20/31	2	RSPC-BBF5380A-D15E-4D9F-A814-C71E1F3700FA	unknown	—	—	—
└ 166.78.225.24/29	8	RACKS-8-1360299373832282	unknown	—	—	—
└ 166.78.225.32/30	4	RACKS-8-1360317134917345	unknown	—	—	—
└ 166.78.225.36/30	4	RACKS-8-1360320373867493	unknown	—	—	—
└ 166.78.225.64/29	8	RACKS-8-1360339095156806	unknown	—	—	—
└ 166.78.225.72/29	8	RACKS-8-1360340425683548	unknown	—	—	—
└ 166.78.225.80/30	4	RACKS-8-1360340536795447	unknown	—	—	—
└ 166.78.225.84/30	4	RSPC-9B85D3AA-76FD-4DE5-81D5-07DD83C35997	unknown	—	—	—
└ 166.78.225.88/29	8	RACKS-8-1451415040182808	unknown	—	—	—
└ 166.78.225.120/29	8	RACKS-8-1360359133504446	unknown	—	—	—
└ 166.78.225.130/31	2	RSPC-496AABA8-83C9-4E67-91B2-3AA5D4F3429A	unknown	—	—	—
└ 166.78.225.132/30	4	RACKS-8-1446239897746052	unknown	—	—	—
└ 166.78.225.160/30	4	RSPC-0B4C851E-5589-49BC-A88C-7E642952D095	unknown	—	—	—
└ 166.78.225.164/31	2	RSPC-3C4A100C-CD04-441D-B4AB-640C4CA509D1	unknown	—	—	—
└ 166.78.225.166/31	2	RSPC-7D8EC6CA-F470-47C4-87B0-DAA802301264	unknown	—	—	—
└ 166.78.225.168/30	4	RACKS-8-1360507573737145	unknown	—	—	—
└ 166.78.225.188/30	4	RACKS-8-1360596136022266	unknown	—	—	—
└ 166.78.225.200/29	8	RACKS-8-1360595295610509	unknown	—	—	—
└ 166.78.225.208/29	8	RACKS-8-1360596626285324	unknown	—	—	—
└ 166.78.225.216/29	8	RACKS-8-1360601053382762	unknown	—	—	—
└ 166.78.225.232/31	2	RSPC-5122B425-1476-4BBE-AAD2-05AC54032E4E	unknown	—	—	—
└ 166.78.225.236/30	4	RACKS-8-1387921336625318	unknown	—	—	—
└ 166.78.225.248/31	2	RACKS-8-1462727300069475	unknown	—	—	—
└ 166.78.225.252/30	4	RACKS-8-1446674443950223	unknown	—	—	—
└ 166.78.226.0/30	4	RSPC-BACA7C0A-C347-4E9C-A655-EC01C6A5EF86	unknown	—	—	—
└ 166.78.226.4/30	4	RACKS-8-1360631775564474	unknown	—	—	—
└ 166.78.226.20/30	4	RACKS-8-1360686254325230	unknown	—	—	—
└ 166.78.226.44/30	4	RSPC-E075A152-F72F-4858-B616-9C10C0B75C9F	unknown	—	—	—
└ 166.78.226.68/30	4	RSPC-B1F27ED7-0465-4FC9-98B6-7BDD125A9461	unknown	—	—	—
└ 166.78.226.84/30	4	RSPC-3FE3FC87-35F2-4866-B7AF-7BBA01242749	unknown	—	—	—
└ 166.78.226.92/30	4	RACKS-8-1360803134237655	unknown	—	—	—
└ 166.78.226.116/30	4	RACKS-8-1360854134070890	unknown	—	—	—
└ 166.78.226.120/29	8	RACKS-8-1360857974566892	unknown	—	—	—
└ 166.78.226.144/29	8	RACKS-8-1360867333776669	unknown	—	—	—
└ 166.78.226.154/31	2	RSPC-91A91BB4-DDB1-44B7-9AE2-913FB8AEE813	unknown	—	—	—
└ 166.78.226.192/29	8	RACKS-8-1451425098538803	unknown	—	—	—
└ 166.78.226.200/30	4	RACKS-8-1420725377191709	unknown	—	—	—
└ 166.78.226.208/30	4	RACKS-8-1360882695062395	unknown	—	—	—
└ 166.78.226.212/30	4	RACKS-8-1360886654071922	unknown	—	—	—
└ 166.78.226.216/29	8	RACKS-8-1462563620004102	unknown	—	—	—
└ 166.78.226.224/30	4	RACKS-8-1360892423850184	unknown	—	—	—
└ 166.78.226.232/29	8	RACKS-8-1360892894739909	unknown	—	—	—
└ 166.78.226.248/29	8	RACKS-8-1360940293601725	unknown	—	—	—
└ 166.78.227.0/30	4	RACKS-8-1360942824037606	unknown	—	—	—
└ 166.78.227.8/29	8	RACKS-8-1360945825439404	unknown	—	—	—
└ 166.78.227.44/30	4	RSPC-CE3752A8-79D1-4405-8A22-8DF21F41DFF6	unknown	—	—	—
└ 166.78.227.48/30	4	RACKS-8-1360968374969302	unknown	—	—	—
└ 166.78.227.56/31	2	RSPC-7484074D-3372-4F90-9F17-87923A8ABEC2	unknown	—	—	—
└ 166.78.227.88/29	8	RACKS-8-1361106254370520	unknown	—	—	—
└ 166.78.227.104/30	4	RSPC-5032A116-CDFB-4075-BAEF-C79EF34B872C	unknown	—	—	—
└ 166.78.227.160/30	4	RACKS-8-1361219293017157	unknown	—	—	—
└ 166.78.227.164/30	4	RACKS-8-1427991257907102	unknown	—	—	—
└ 166.78.227.184/29	8	RSPC-A24FAEAC-9238-496A-9D1B-0BE78C736779	unknown	—	—	—
└ 166.78.227.192/27	32	RACKS-8-1381777574583001	unknown	—	—	—
└ 166.78.227.224/30	4	RACKS-8-1361223026242228	unknown	—	—	—
└ 166.78.227.232/30	4	RSPC-6E47B8FA-DF5A-4B9C-B16C-C820BC9D0EE6	unknown	—	—	—
└ 166.78.227.236/30	4	RSPC-8CCFBD2A-8B24-41CF-8598-DD95184136AF	unknown	—	—	—
└ 166.78.227.240/29	8	RACKS-8-1456174844381709	unknown	—	—	—
└ 166.78.227.248/29	8	RSPC-C61D2158-5998-4014-81C5-D98422CC219B	unknown	—	—	—
└ 166.78.228.4/30	4	RSPC-5044722C-0E05-45B3-B2C7-CEDE85609CC5	unknown	—	—	—
└ 166.78.228.8/30	4	RSPC-AF5ACE84-A227-45D9-9120-945F88CE3255	unknown	—	—	—
└ 166.78.228.12/30	4	RSPC-9CC39496-C226-4AB6-A713-CB0C67BB49EE	unknown	—	—	—
└ 166.78.228.24/30	4	RACKS-8-1361820255584103	unknown	—	—	—
└ 166.78.228.28/30	4	RACKS-8-1379499855467407	unknown	—	—	—
└ 166.78.228.32/30	4	RACKS-8-1361827095069392	unknown	—	—	—
└ 166.78.228.36/30	4	RACKS-8-1361831055019742	unknown	—	—	—
└ 166.78.228.40/30	4	RACKS-8-1361833694775396	unknown	—	—	—
└ 166.78.228.44/30	4	RACKS-8-1361834294884630	unknown	—	—	—
└ 166.78.228.48/30	4	RACKS-8-1361844854181837	unknown	—	—	—
└ 166.78.228.56/30	4	RACKS-8-1430832257486743	unknown	—	—	—
└ 166.78.228.60/30	4	RACKS-8-1361892733030410	unknown	—	—	—
└ 166.78.228.64/30	4	RACKS-8-1402693934567277	unknown	—	—	—
└ 166.78.228.68/31	2	RACKS-8-1403010379131168	unknown	—	—	—
└ 166.78.228.70/31	2	RACKS-8-1403105536462810	unknown	—	—	—
└ 166.78.228.76/30	4	RACKS-8-1402697654188909	unknown	—	—	—
└ 166.78.228.88/30	4	RACKS-8-1434657377976959	unknown	—	—	—
└ 166.78.228.92/30	4	RACKS-8-1402720826935113	unknown	—	—	—
└ 166.78.228.100/30	4	RACKS-8-1361907975790006	unknown	—	—	—
└ 166.78.228.104/30	4	RACKS-8-1361912295723842	unknown	—	—	—
└ 166.78.228.108/30	4	RACKS-8-1396631175913746	unknown	—	—	—
└ 166.78.228.112/31	2	RACKS-8-1406039537264673	unknown	—	—	—
└ 166.78.228.114/31	2	RACKS-8-1463665940215513	unknown	—	—	—
└ 166.78.228.164/30	4	RACKS-8-1361989455136192	unknown	—	—	—
└ 166.78.228.168/30	4	RACKS-8-1361997031182513	unknown	—	—	—
└ 166.78.228.172/30	4	RACKS-8-1401308774008623	unknown	—	—	—
└ 166.78.228.180/30	4	RSPC-A2B9C9EA-4523-46C0-AA44-2571EF6D073F	unknown	—	—	—
└ 166.78.228.188/30	4	RSPC-B16819C0-E634-48D2-AF01-7DA7022A16D8	unknown	—	—	—
└ 166.78.228.192/27	32	RACKS-8-1361999054184862	unknown	—	—	—
└ 166.78.228.224/27	32	RACKS-8-1361999054925644	unknown	—	—	—
└ 166.78.229.0/27	32	RACKS-8-1361999174635564	unknown	—	—	—
└ 166.78.229.32/27	32	RACKS-8-1361999174301290	unknown	—	—	—
└ 166.78.229.80/30	4	RACKS-8-1401370936734408	unknown	—	—	—
└ 166.78.229.92/30	4	RACKS-8-1420754297808752	unknown	—	—	—
└ 166.78.229.112/29	8	RACKS-8-1362155775257318	unknown	—	—	—
└ 166.78.229.120/30	4	RSPC-702EDC4A-4C6B-4D0D-84B4-D2FF301DA94D	unknown	—	—	—
└ 166.78.229.124/30	4	RACKS-8-1362181227210642	unknown	—	—	—
└ 166.78.229.128/29	8	RACKS-8-1362169094388825	unknown	—	—	—
└ 166.78.229.136/29	8	RACKS-8-1362181825780768	unknown	—	—	—
└ 166.78.229.164/30	4	RACKS-8-1420755976864644	unknown	—	—	—
└ 166.78.229.180/30	4	RACKS-8-1362432736092410	unknown	—	—	—
└ 166.78.229.192/26	64	RACKS-8-1362612374884304	unknown	—	—	—
└ 166.78.230.0/29	8	RACKS-8-1362427095983650	unknown	—	—	—
└ 166.78.230.24/29	8	RACKS-8-1362437057235460	unknown	—	—	—
└ 166.78.230.32/30	4	RACKS-8-1362444135227257	unknown	—	—	—
└ 166.78.230.90/31	2	RSPC-CBF6AC37-F1B5-4B64-9A00-5A0541633BFF	unknown	—	—	—
└ 166.78.230.92/30	4	RSPC-760E28AE-3DF8-4E9C-B02B-F89B9834FD6B	unknown	—	—	—
└ 166.78.230.104/29	8	RACKS-8-1362492623403234	unknown	—	—	—
└ 166.78.231.8/30	4	RACKS-8-1375716973497412	unknown	—	—	—
└ 166.78.231.16/29	8	RSPC-0621CF5C-E3F0-4952-9F40-7C2D7094E11E	unknown	—	—	—
└ 166.78.231.24/30	4	RSPC-22AECC2F-F93B-4073-8FBF-4E0ADC07AD2D	unknown	—	—	—
└ 166.78.231.28/30	4	RSPC-7137DAD9-741E-47A5-A613-798C31ABC54A	unknown	—	—	—
└ 166.78.231.40/30	4	RSPC-07A9C30F-CA5A-4B81-A4F8-21FF4836CF57	unknown	—	—	—
└ 166.78.231.44/30	4	RSPC-D60B8509-8B21-461D-B8BE-7D8AA7AE8CBD	unknown	—	—	—
└ 166.78.231.96/28	16	RACKS-8-1362636496694509	unknown	—	—	—
└ 166.78.231.116/30	4	RSPC-BDA3EB5B-F9F6-4513-BE94-B19032FAE0A4	unknown	—	—	—
└ 166.78.231.120/30	4	RACKS-8-1363130417824332	unknown	—	—	—
└ 166.78.231.124/30	4	RACKS-8-1363140975182412	unknown	—	—	—
└ 166.78.231.128/27	32	RACKS-8-1362801136371043	unknown	—	—	—
└ 166.78.231.160/27	32	RACKS-8-1363118775796543	unknown	—	—	—
└ 166.78.231.192/27	32	RACKS-8-1363119496553262	unknown	—	—	—
└ 166.78.231.232/30	4	RACKS-8-1435756937048895	unknown	—	—	—
└ 166.78.231.236/30	4	RACKS-8-1363201842093158	unknown	—	—	—
└ 166.78.231.248/30	4	RSPC-3421786A-8D39-48E6-80FA-55C695196A86	unknown	—	—	—
└ 166.78.232.4/30	4	RACKS-8-1422456738714902	unknown	—	—	—
└ 166.78.232.8/30	4	RACKS-8-1363214776433936	unknown	—	—	—
└ 166.78.232.12/30	4	RACKS-8-1453480577941613	unknown	—	—	—
└ 166.78.232.16/30	4	RACKS-8-1363251032645392	unknown	—	—	—
└ 166.78.232.28/30	4	RACKS-8-1363275976632598	unknown	—	—	—
└ 166.78.232.32/30	4	RACKS-8-1363276236134969	unknown	—	—	—
└ 166.78.232.40/30	4	RACKS-8-1363278376065433	unknown	—	—	—
└ 166.78.232.44/30	4	RACKS-8-1363278735128695	unknown	—	—	—
└ 166.78.232.48/30	4	RACKS-8-1363279228227921	unknown	—	—	—
└ 166.78.232.52/30	4	RACKS-8-1363279335535074	unknown	—	—	—
└ 166.78.232.56/30	4	RACKS-8-1363279575243449	unknown	—	—	—
└ 166.78.232.60/30	4	RACKS-8-1363280055974713	unknown	—	—	—
└ 166.78.232.64/30	4	RACKS-8-1363289656696045	unknown	—	—	—
└ 166.78.232.72/30	4	RACKS-8-1363307427171040	unknown	—	—	—
└ 166.78.232.80/30	4	RSPC-8A61D010-588D-4F16-93DD-C4FB8123EC25	unknown	—	—	—
└ 166.78.232.88/30	4	RACKS-8-1363341135350721	unknown	—	—	—

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Network & registry

Announcement Routing history RPKI & IRR Whois & abuse

Origin network

AS19994

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

166.78.192.0/18

Registrations in this block

Network & registry

AS19994

Who has announced this prefix

Routing history

Route objects on the exact prefix

Registration for this announcement

Abuse contact