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United Kingdom

Autonomous systems and IP prefixes registered in United Kingdom.

Registered ASNs
3,141
IPv4 Prefixes
590,698
IPv6 Prefixes
135,198

Largest Networksby registered prefixes

#ASNNamePrefixes
1AS212238RIPENCCCDNEXT Datacamp Limited2,156
2AS62240RIPENCCClouvider Clouvider Limited1,591
3AS8912RIPENCCNETBENEFIT Aptum Technologies (UK) Limited1,279
4AS31708RIPENCCCOREIX-UK-AS Coreix Ltd460
5AS60068RIPENCCCDN77 Datacamp Limited452
6AS214238RIPENCCiwihost HOST TELECOM LTD404
7AS215540RIPENCCGCS-AS GLOBAL CONNECTIVITY SOLUTIONS LLP391
8AS15692RIPENCCRAZORBLUE Razorblue Ltd373
9AS2856RIPENCCBT-UK-AS British Telecommunications Limited340
10AS31727RIPENCCNODE4-AS Node4 Limited300
11AS42831RIPENCCUKSERVERS-AS UK Dedicated Servers Limited296
12AS202831RIPENCCPACKETLOSS Packet Loss LTD271
13AS2589RIPENCCWANSTOR Wanstor Ltd265
14AS25369RIPENCCBANDWIDTH-AS Hydra Communications Ltd254
15AS42689RIPENCCGlide Glide Student & Residential Limited226
16AS197107RIPENCCBlueChip SERVICE EXPRESS EUROPE LIMITED225
17AS215439RIPENCCPLAY2GO-NET PLAY2GO INTERNATIONAL LIMITED218
18AS214143RIPENCCskydigital-telecom SKYDIGITAL TELECOM LTD211
19AS786RIPENCCJANET Jisc Services Limited189
20AS39097RIPENCCMAINTEL-LTD-UK Maintel Europe Limited187
21AS207957RIPENCCServHost-AS SERV.HOST GROUP LTD187
22AS20860RIPENCCIOMART-AS IOMART CLOUD SERVICES LIMITED184
23AS44444RIPENCCForcepoint-Cloud-AS Forcepoint UK Limited177
24AS3223RIPENCCVOXILITY Voxility LLP170
25AS8851RIPENCCEDGE GCI Network Solutions Limited170
26AS51055RIPENCCBRIDGEP-AS Bridge Fibre Limited168
27AS205489RIPENCCCODEASSET CODE ASSET LTD153
28AS203346RIPENCCAS-232WEB Proper Support LLP150
29AS43937RIPENCCPTNET Playtech Software Ltd149
30AS201838RIPENCCASN-COMMUNITYFIBRE Community Fibre Limited121
31AS215590RIPENCCXORA-AS DpkgSoft International Limited121
32AS8220RIPENCCCOLT COLT Technology Services Group Limited116
33AS50746RIPENCCBTL Britannic Technologies Ltd115
34AS213877RIPENCCU1DS-AS U1 DIGITAL SERVICES LTD114
35AS16247RIPENCCM247-UK Convergence Group (Wireless) Networks Limited112
36AS207461RIPENCChost-industry HOSTING INDUSTRY LIMITED111
37AS8426RIPENCCCLARANET-AS Claranet Limited109
38AS214432RIPENCCZLIDC Zhilian Technology CO., LTD.108
39AS61112RIPENCCAkileCloud AKILE LTD101
40AS41095RIPENCCIPTP IPTP LTD89
41AS5089RIPENCCNTL Virgin Media Limited85
42AS48101RIPENCCTROOLI-AS Trooli Ltd.85
43AS216127RIPENCCNUXT-AS INTERNATIONAL HOSTING COMPANY LIMITED85
44AS5413RIPENCCWavenet-AS5413 Wavenet Limited84
45AS209641RIPENCCI-SERVERS-EAST IHOR HOSTING LTD84
46AS216139RIPENCCIRONHOST Iron Hosting Centre LTD81
47AS30844RIPENCCLIQUID-AS Liquid Telecommunications Ltd79
48AS15404RIPENCCCOLT Technology Services Group Limited78
49AS20712RIPENCCAS20712 Andrews & Arnold Ltd78
50AS213607RIPENCCWORLD-FIRST-COMMUNICATION-LTD WORLD FIRST COMMUNICATION LTD78
51AS5400RIPENCCBT British Telecommunications Limited77
52AS13285RIPENCCOPALTELECOM-AS TalkTalk Communications Limited75
53AS213887RIPENCCWAICORE-LTD WAIcore Ltd75
54AS34270RIPENCCINETC Internet Connections Ltd72
55AS15418RIPENCCIONOS-ANYCAST Fasthosts Internet Limited71
56AS199614RIPENCCFICITY-AS-01 Fiberocity Ltd68
57AS13205RIPENCCBritish Telecommunications Limited65
58AS52025RIPENCCPARADOXNETWORKS-LIMITED ParadoxNetworks Limited65
59AS204997RIPENCCFIRSTBYTE-AS FIRST SERVER LIMITED65
60AS207569RIPENCCI-SERVERS-NORTH-EU IHOR HOSTING LTD64
61AS209693RIPENCCOC-NETWORK OC NETWORKS LIMITED64
62AS213915RIPENCCHOSTES-AS HOSTES LTD63
63AS8897RIPENCCKCOM-SPN KCOM Group Limited62
64AS35228RIPENCCO2BROADBAND Telefonica UK Limited61
65AS205544RIPENCCLEASEWEB-UK-LON-11 Leaseweb UK Limited60
66AS29611RIPENCCELITE-AS Elite Limited59
67AS12703RIPENCCPULSANT-AS Pulsant (Scotland) Ltd58
68AS15395RIPENCCRACKSPACE-LON Rackspace Ltd.58
69AS21267RIPENCCWavenet-AS21267 Wavenet Limited58
70AS58065RIPENCCPacketExchange Orion Network Limited58
71AS200740RIPENCCFIRST-SERVER-EU-AS FIRST SERVER LIMITED57
72AS206134RIPENCCNEKO-AS NEKOBYTE INTERNATIONAL LIMITED57
73AS6871RIPENCCPlusnet British Telecommunications Limited56
74AS20738RIPENCCGD-EMEA-DC-LD5 Heart Internet limited56
75AS13213RIPENCCUK2NET-AS THG HOSTING LIMITED55
76AS61323RIPENCCUKFAST ANS ACADEMY LIMITED55
77AS201988RIPENCCVPSPay-ASN VPSPay Networks LTD55
78AS9002RIPENCCRETN-AS RETN Limited53
79AS199741RIPENCCTRANSITX-BYOIP-Customers TransitX Ltd53
80AS202596RIPENCCGNETWORK GNC Realisations 2026 Limited53
81AS43915RIPENCCTRUESPEED TrueSpeed Communications Limited52
82AS58273RIPENCCB4RN-AS Broadband for the Rural North Limited.52
83AS60819RIPENCCSAFENAMES-AS Safenames Ltd.52
84AS210546RIPENCCCHSL-ONE CHSL ONE LTD52
85AS5503RIPENCCRMIFL RM Education Ltd51
86AS8468RIPENCCENTANET Cityfibre Limited51
87AS49683RIPENCCMASSIVEGRID MASSIVEGRID LTD50
88AS3170RIPENCCVELOXSERV VeloxServ Communications Ltd49
89AS25180RIPENCCEXPONENTIAL-E-AS Exponential-E Ltd.47
90AS51561RIPENCCAS-ICUK ICUK Computing Services Limited47
91AS214731RIPENCCETO-AS ETO Networks Limited47
92AS216138RIPENCCSKYQUANTUM-TELECOM SKYQUANTUM TELECOM LTD.47
93AS25577RIPENCCC4L-AS MAINFRAME & CYBERNETIC SYSTEMS LIMITED46
94AS5607RIPENCCBSKYB-BROADBAND-AS Sky UK Limited45
95AS29457RIPENCCOPTIONS-AS Options Technology Ltd45
96AS205090RIPENCCFIRST-SERVER-EUROPE FIRST SERVER LIMITED45
97AS64080RIPENCCSYN-UK SYN LTD44
98AS212706RIPENCCLIVI-HOSTING-AS LIVI HOSTING LTD44
99AS3300RIPENCCBT British Telecommunications Limited43
100AS6908RIPENCCDATAHOP Six Degrees Technology Group Limited43

Threat map: malicious IPs in United Kingdom

320 flagged IPv4 networks on 2026-10-11, #14 of 179 countries; 2.26 per million allocated IPv4 addresses (#71 by rate).

IP Address Transfers

Last 12 months: 1,089 registry transfers involving organisations in United Kingdom, 5.2M IPv4 addresses.

IPv4 received from

  1. 1🇺🇸 United States715K
  2. 2🇨🇭 Switzerland131K
  3. 3🇳🇱 Netherlands59K
  4. 4🇨🇦 Canada33K
  5. 5🇪🇪 Estonia27K

IPv4 sent to

  1. 1🇺🇸 United States887K
  2. 2🇸🇬 Singapore369K
  3. 3🇩🇪 Germany362K
  4. 4🇱🇹 Lithuania131K
  5. 5🇮🇹 Italy77K
IPv4 transfers in United Kingdom →All transfers for United Kingdom →Global IPv4 transfer market →