Autonomous System details

AS51561

ICUK Computing Services Limited · icuk.net

United Kingdom

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AS51561 – ICUK Computing Services Limited

Field	Value
Country	United Kingdom
Website	icuk.net
Hosted domains	11,004
IPv4 addresses	70,656
IPv6 addresses	79,229,371,440,083,952,629,200,000,000
ASN type	ISP
Registry	ripe
Allocated	16 years ago on Sep 28, 2010
Updated	2 months ago on Feb 24, 2026

Netblock	Company	Num of IPs
46.33.128.0/19	ICUK Computing Services Limited	8,192
46.102.192.0/19	ICUK Computing Services Limited	8,192
80.209.128.0/19	ICUK Computing Services Limited	8,192
188.240.160.0/19	ICUK Computing Services Limited	8,192
205.157.160.0/19	ICUK Computing Services Limited	8,192
80.95.192.0/20	ICUK Computing Services Limited	4,096
80.209.160.0/20	ICUK Computing Services Limited	4,096
138.124.128.0/20	ICUK Computing Services Limited	4,096
80.209.176.0/21	ICUK Computing Services Limited	2,048
2.56.84.0/22	ICUK Computing Services Limited	1,024
45.93.112.0/22	ICUK Computing Services Limited	1,024
80.209.184.0/22	ICUK Computing Services Limited	1,024
89.107.24.0/22	CSD Communications Ltd	1,024
185.2.236.0/22	ICUK Computing Services Limited	1,024
185.145.152.0/22	ICUK Computing Services Limited	1,024
185.201.208.0/22	CTR Communications Limited	1,024
5.133.168.0/23	Jibba Jabba Internet Services Ltd	512
5.133.170.0/23	Jibba Jabba Internet Services Ltd	512
5.254.162.0/23	Webmate Internet Services Ltd.	512
5.254.164.0/23	Webmate Internet Services Ltd.	512
45.93.112.0/23	ICUK Computing Services Limited	512
45.145.86.0/23	Fluidity Connect Limited	512
185.140.16.0/23	ICUK Computing Services Limited	512
185.140.18.0/23	ICUK Computing Services Limited	512
37.235.43.0/24	Shetland Broadband LLP	256
46.33.128.0/24	Interdsl Network Structure	256
46.33.130.0/24	ICUK Computing Services Limited	256
46.33.156.0/24	LL user 11125185019	256
46.102.192.0/24	ICUK Computing Services Limited	256
46.102.193.0/24	ICUK Computing Services Limited	256
46.226.120.0/24	Agile ICT Ltd	256
80.209.128.0/24	ICUK Computing Services Limited	256
80.209.155.0/24	LL 191975205	256
80.209.159.0/24	ICUK Computing Services Limited	256
80.247.216.0/24	CEF (W) SA	256
82.39.142.0/24	VersaTek	256
91.233.33.0/24	Metropolitan Networks UK Ltd	256
138.124.128.0/24	ICUK Computing Services Limited	256
138.124.134.0/24	DN9 3GA	256
138.124.135.0/24	LL user 377387195	256
138.124.136.0/24	BB 33311135635	256
138.124.137.0/24	BB 52205100875	256
138.124.138.0/24	LL user 497791650	256
138.124.142.0/24	LL user 3274131897	256
181.215.32.0/24	No Metric Limited	256
185.32.55.0/24	Lantec Manchester DC 1	256
185.132.52.0/24	NWIMS Communications	256
185.137.240.0/24	ICUK Global CDN Platform	256
185.145.152.0/24	ICUK Computing Services Limited	256
185.152.2.0/24	Pine Media Ltd	256
185.234.255.0/24	Network 79 Ltd	256
185.243.62.0/24	Multidata Ltd	256
185.243.63.0/24	Multidata Ltd	256
185.253.88.0/24	SDC Hosting and Support Ltd	256
188.211.249.0/24	Select Comms LTD	256
188.240.160.0/24	ICUK Computing Services Limited	256
188.240.172.0/24	ICUK Computing Services Limited	256
188.240.173.0/24	ICUK Computing Services Limited	256
188.240.191.0/24	ICUK Computing Services Limited	256
193.161.9.0/24	HP Networks Ltd	256
193.161.10.0/24	HP Networks Ltd	256
193.187.0.0/24	Select Comms LTD	256

Netblock	Company
2a00:b900::/32	ICUK Computing Services Limited
2a00:b900:2::/48	ICUK Computing Services Limited

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WHOIS Details

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                                                ASHandle:       AS51561
                                                OrgID:          AS51561
                                                ASName:         AS51561
                                                ASNumber:       AS51561
                                                RegDate:        0000-00-00
                                                Updated:        0000-00-00
                                                TechHandle:     AA00-AAAA
                                                Source:         AAAA

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Hosted Domains

There are 11,004 domain names hosted across 352 IP addresses on this ASN.

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IP Address	Domain	Domains on this IP
188.240.191.168	██████████	951
188.240.191.171	██████████	856
188.240.191.163	██████████	853
188.240.191.161	██████████	805
188.240.191.160	██████████	793
188.240.191.166	██████████	771
188.240.191.169	██████████	755
188.240.191.164	██████████	752
188.240.191.165	██████████	728
188.240.191.167	██████████	724

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Hosted Domains API & Database

Peers

There are 120 peers for this ASN.

Peers	Name
AS1031	PEER 1031 LLC
AS1239	Cogent Communications, LLC
AS12552	GlobalConnect AB
AS1267	WIND TRE S.P.A.
AS12713	OTEGlobe
AS12779	IT.Gate S.p.A.
AS12969	Vodafone Iceland
AS132337	Axclusive
AS13237	euNetworks GmbH
AS13335	Cloudflare, Inc.
AS137409	GSL Networks Pty LTD
AS14537	Continent 8 LLC
AS14630	Invesco Group Services, Inc.
AS14840	BR.Digital Telecom
AS15412	FLAG TELECOM UK LIMITED
AS15802	Emirates Integrated Telecommunications Company PJSC
AS16347	ADISTA SAS
AS16552	Tiggee LLC
AS174	Cogent Communications, LLC
AS17639	Converge ICT Solutions Inc.
AS18106	Viewqwest Pte Ltd
AS1828	Unitas Global
AS198150	SIACOM JSC
AS199204	Webmate Internet Services Ltd.
AS201060	SNETTERTON TELECOM LIMITED
AS20562	Broadband Hosting B.V.
AS20764	CJSC RASCOM
AS207841	Inferno Communications Ltd
AS21215	UNITED GROUP NETWORK INFRASTRUCTURE d.o.o. Beograd
AS212483	LEVEL EIGHTY-SIX COMMUNICATIONS LTD
AS213241	TECHIT.BE SRL
AS215638	Cilix Limited
AS22356	Durand do Brasil Ltda
AS24482	SG.GS
AS24940	Hetzner Online GmbH
AS25091	IP-Max SA
AS25160	Vorboss Limited
AS25369	Hydra Communications Ltd
AS263152	MIGO TELECOM
AS271253	LINK BRASIL TELECOMUNICACOES LTDA
AS28792	Public Internet Ltd
AS29049	Delta Telecom Ltd
AS29075	IELO Main Network
AS2914	NTT America, Inc.
AS30844	Liquid Telecommunications Ltd
AS31122	Digiweb ltd
AS31500	Global Network Management Inc
AS3170	VeloxServ Communications Ltd
AS31742	Sotaconnect Network
AS3214	xTom GmbH
AS3216	PJSC "Vimpelcom"
AS32590	Valve Corporation
AS3356	Level 3 Parent, LLC
AS33891	Core-Backbone GmbH
AS34177	CELESTE SAS
AS34288	Kantonsschule Zug
AS34549	meerfarbig GmbH & Co. KG
AS34927	iFog GmbH
AS35266	EX Networks Limited
AS35280	F5 Networks SARL
AS36236	NetActuate, Inc
AS37100	SEACOM Limited
AS37282	Main one Cable Company Nigeria Limited
AS3741	Dimension Data
AS37468	Angola Cables
AS37497	Network Platforms (PTY) LTD
AS37662	West Indian Ocean Cable Company
AS37680	Cool Ideas Service Provider (Pty) Ltd
AS37721	Virtual Technologies & Solutions
AS38880	Micron21 Datacentre Pty Ltd
AS39120	Convergenze S.p.A.
AS39122	Blacknight Internet Solutions Limited
AS39351	31173 Services AB
AS398465	Rackdog, LLC
AS41327	Fiber Telecom S.p.A.
AS41811	CONVERGENCE (GROUP NETWORKS) LIMITED
AS42473	Anexia Cloud Solutions GmbH
AS43733	Viva Armenia CJSC
AS4455	IX Reach Ltd
AS45352	IP ServerOne Solutions Sdn Bhd
AS4651	National Telecom Public Company Limited
AS47957	Worldline IGSA SA
AS48070	DSM (GB) Limited
AS48185	team.blue NV
AS48362	Stadtwerke Feldkirch
AS49544	i3D.net B.V
AS50300	CustodianDC Limited
AS50304	Blix Solutions AS
AS51185	MainStreaming SpA
AS52075	Wifirst S.A.S.
AS52320	GlobeNet Cabos Submarinos Colombia, S.A.S.
AS53062	ALT \| GRUPO BRASIL TECPAR
AS5413	Wavenet Limited
AS56665	Proximus Luxembourg S.A.
AS5713	Telkom SA Ltd.
AS58511	Anycast Global Backbone
AS60171	AFR-IX TELECOM S.A.
AS61049	Exascale Ltd
AS61568	ALOO TELECOM - FSF TECNOLOGIA SA
AS61573	IP TELECOM

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ASN API & Database

Upstreams

There are 5 upstreams for this ASN.

upstreams	Name
AS13335	Cloudflare, Inc.
AS174	Cogent Communications, LLC
AS2914	NTT America, Inc.
AS3356	Level 3 Parent, LLC
AS6939	Hurricane Electric LLC

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ASN API & Database

Downstreams

There are 2 downstreams for this ASN.

Downstreams	Name
AS199204	Webmate Internet Services Ltd.
AS201060	SNETTERTON TELECOM LIMITED

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ASN API & Database

Pingable IPs

274 IPs in this ASN replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address	ASN	Details
185.201.209.184	AS51561 ICUK Computing Services Limited	`0.51ms` from London, GB
46.33.157.174	AS51561 ICUK Computing Services Limited	`0.42ms` from London, GB
185.132.52.4	AS51561 ICUK Computing Services Limited	`6.29ms` from London, GB
80.95.199.237	AS51561 ICUK Computing Services Limited	`2.13ms` from London, GB
80.209.141.160	AS51561 ICUK Computing Services Limited	`2.08ms` from London, GB
185.253.88.36	AS51561 ICUK Computing Services Limited	`0.63ms` from London, GB
80.95.200.196	AS51561 ICUK Computing Services Limited	`0.43ms` from London, GB
138.124.129.215	AS51561 ICUK Computing Services Limited	`3.03ms` from London, GB
46.33.146.173	AS51561 ICUK Computing Services Limited	`2.07ms` from London, GB
46.102.202.34	AS51561 ICUK Computing Services Limited	`3.72ms` from London, GB
188.240.161.246	AS51561 ICUK Computing Services Limited	`2.43ms` from London, GB
185.140.19.119	AS51561 ICUK Computing Services Limited	`1.94ms` from London, GB
46.102.219.216	AS51561 ICUK Computing Services Limited	`0.44ms` from London, GB
2a00:b900:1::2:1	AS51561 ICUK Computing Services Limited	`0.49ms` from London, GB
80.95.207.76	AS51561 ICUK Computing Services Limited	`0.52ms` from London, GB
46.102.192.61	AS51561 ICUK Computing Services Limited	`0.51ms` from London, GB
2a00:b900:129d::1	AS51561 ICUK Computing Services Limited	`8.84ms` from London, GB
185.201.211.16	AS51561 ICUK Computing Services Limited	`0.56ms` from London, GB
2a00:b900:1355:cafe::1	AS51561 ICUK Computing Services Limited	`5.30ms` from London, GB
80.209.154.209	AS51561 ICUK Computing Services Limited	`0.60ms` from London, GB
2a00:b900:2000::c1	AS51561 ICUK Computing Services Limited	`0.43ms` from London, GB
80.209.146.251	AS51561 ICUK Computing Services Limited	`2.78ms` from London, GB
46.102.197.78	AS51561 ICUK Computing Services Limited	`0.38ms` from London, GB
185.145.152.97	AS51561 ICUK Computing Services Limited	`0.58ms` from London, GB
188.240.176.17	AS51561 ICUK Computing Services Limited	`0.49ms` from London, GB

Other Pingable IPs

Below is a random selection of 25 IPs that replied to an ICMP ping during our most recent internet scan.

IP Address	ASN	Details
104.224.4.9	AS14480 County of Orangeburg	`9.59ms` from Atlanta, US
63.142.42.89	AS30036 Mediacom Communications Corp	`0.52ms` from Atlanta, US
172.176.101.217	AS8075 Microsoft Corporation	`0.28ms` from Boydton, US
197.49.190.105	AS8452 TE-AS	`4.96ms` from Cairo, EG
76.16.95.249	AS7922 Comcast Cable Communications, LLC	`8.04ms` from Chicago, US
65.24.37.185	AS10796 Charter Communications Inc	`9.47ms` from Columbus, US
3.130.39.249	AS16509 Amazon.com, Inc.	`0.09ms` from Columbus, US
117.241.246.137	AS9829 National Internet Backbone	`6.57ms` from Delhi, IN
212.154.114.41	AS12735 TurkNet Iletisim Hizmetleri A.S.	`0.28ms` from Istanbul, TR
208.131.177.105	AS10292 Cable & Wireless Jamaica	`1.01ms` from Kingston, JM
91.232.158.105	AS198227 New Telecom Ltd	`0.44ms` from Kyiv, UA
59.47.139.41	AS4134 CHINANET BACKBONE	`4.24ms` from Liaoyang, CN
185.250.10.41	AS209505 Unchained ISP Limited	`0.31ms` from London, GB
86.204.6.105	AS3215 Orange S.A.	`3.53ms` from Marseille, FR
110.2.221.153	AS7522 STNet, Incorporated	`7.00ms` from Osaka, JP
181.233.178.9	AS271500 LINKGOLD TELECOMUNICACOES	`0.81ms` from Osasco, BR
195.81.62.153	AS3257 GTT Communications Inc.	`0.55ms` from Paris, FR
24.115.6.201	AS3737 PenTeleData Inc.	`8.90ms` from Philadelphia, US
94.19.148.185	AS35807 SkyNet Ltd.	`0.58ms` from Saint Petersburg, RU
184.69.163.105	AS6327 Shaw Communications	`2.21ms` from Seattle, US
112.223.112.169	AS3786 LG DACOM Corporation	`1.82ms` from Seoul, KR
183.123.78.137	AS4766 Korea Telecom	`4.82ms` from Seoul, KR
47.50.217.57	AS20115 Charter Communications LLC	`1.74ms` from St. Louis, US
223.95.181.137	AS56041 China Mobile communications corporation	`5.89ms` from Suzhou, CN
115.128.51.57	AS7545 TPG Telecom Limited	`1.20ms` from Sydney, AU

Traceroute

Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this ASN. Learn more.

traceroute -a -n -q1 -f3 193.161.9.170

traceroute to 193.161.9.170 (193.161.9.170): 64 hops max, 52 byte packets

3 [AS36236] 185.40.232.17 0.321 ms

4 [AS51561] 193.161.9.170 0.722 ms

Measurement taken from

IPinfo ProbeNet in London, GB

On April 13th 2026

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What is an ASN?

Autonomous System Numbers (ASNs) are assigned to entities such as Internet Service Providers and other large organizations that control blocks of IP addresses. This network page, and the organization field that's shown on the main IP address information page and also returned in the geolocation API are based on the ASN.

The ASN details will often correspond to the IP address owner, but for smaller organizations it may be that organization's parent, or their ISP. Find out more about AS51561 at robtex.

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