Autonomous System details

AS43872

Optinet U.K. Limited · optinet.co.uk

United Kingdom

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AS43872 – Optinet U.K. Limited

Field	Value
Country	United Kingdom
Website	optinet.co.uk
Hosted domains	15
IPv4 addresses	6,400
IPv6 addresses	4,436,777,100,798,802,905,238,461,218,816
ASN type	ISP
Registry	ripe
Allocated	9 years ago on Dec 20, 2016
Updated	3 months ago on Nov 28, 2025

Netblock	Company	Num of IPs
5.253.252.0/22	Optinet U.K. Limited	1,024
185.183.20.0/22	Optinet U.K. Limited	1,024
185.253.176.0/22	Optinet U.K. Limited	1,024
45.136.108.0/24	Optinet U.K. Limited	256
84.38.246.0/24	Harrods International Ltd	256
91.201.105.0/24	Guaranty Trust Bank (UK) Limited	256
92.118.111.0/24	Optinet U.K. Limited	256
176.101.169.0/24	Optinet U.K. Limited	256
185.187.61.0/24	Optinet U.K. Limited	256
193.105.189.0/24	Optinet U.K. Limited	256
193.247.94.0/24	Optinet U.K. Limited	256
193.247.101.0/24	Optinet U.K. Limited	256
193.247.103.0/24	Optinet U.K. Limited	256
193.247.165.0/24	Optinet U.K. Limited	256
195.234.28.0/24	Optinet U.K. Limited	256
217.198.183.0/24	Optinet U.K. Limited	256

Netblock	Company
2a0b:180::/29	Optinet U.K. Limited
2a0d:1e80::/29	Optinet U.K. Limited
2a10:c740::/29	Optinet U.K. Limited
2a10:c7c0::/29	Optinet U.K. Limited
2a10:c8c0::/29	Optinet U.K. Limited
2a10:c9c0::/29	Optinet U.K. Limited
2a10:cac0::/29	Optinet U.K. Limited

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WHOIS Details

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                                                ASHandle:       AS43872
                                                OrgID:          AS43872
                                                ASName:         AS43872
                                                ASNumber:       AS43872
                                                RegDate:        0000-00-00
                                                Updated:        0000-00-00
                                                TechHandle:     AA00-AAAA
                                                Source:         AAAA

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Hosted Domains

There are 15 domain names hosted across 11 IP addresses on this ASN.

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IP Address	Domain	Domains on this IP
185.253.177.226	██████████	5
92.118.111.12	██████████	1
193.105.189.235	██████████	1
185.183.20.100	██████████	1
185.183.22.26	██████████	1
193.105.189.234	██████████	1
193.105.189.98	██████████	1
185.187.61.169	██████████	1
5.253.255.58	██████████	1
92.118.111.139	██████████	1

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Hosted Domains API & Database

Peers

There are 79 peers for this ASN.

Peers	Name
AS1031	PEER 1031 LLC
AS1239	Cogent Communications, LLC
AS12552	GlobalConnect AB
AS1267	WIND TRE S.P.A.
AS12969	Vodafone Iceland
AS1299	Arelion Sweden AB
AS132337	Axclusive
AS13237	euNetworks GmbH
AS137409	GSL Networks Pty LTD
AS14537	Continent 8 LLC
AS14630	Invesco Group Services, Inc.
AS14840	BR.Digital Telecom
AS15802	Emirates Integrated Telecommunications Company PJSC
AS16552	Tiggee LLC
AS174	Cogent Communications, LLC
AS18106	Viewqwest Pte Ltd
AS1828	Unitas Global
AS198150	SIACOM JSC
AS20562	Broadband Hosting B.V.
AS20764	CJSC RASCOM
AS207841	Inferno Communications Ltd
AS212483	LEVEL EIGHTY-SIX COMMUNICATIONS LTD
AS24482	SG.GS
AS25091	IP-Max SA
AS25160	Vorboss Limited
AS286	GTT Communications Inc.
AS28792	Public Internet Ltd
AS30781	Free Pro SAS
AS30844	Liquid Telecommunications Ltd
AS3170	VeloxServ Communications Ltd
AS31742	Sotaconnect Network
AS3214	xTom GmbH
AS3257	GTT Communications Inc.
AS32590	Valve Corporation
AS33891	Core-Backbone GmbH
AS34177	CELESTE SAS
AS34288	Kantonsschule Zug
AS34549	meerfarbig GmbH & Co. KG
AS34927	iFog GmbH
AS35266	EX Networks Limited
AS36236	NetActuate, Inc
AS37100	SEACOM Limited
AS3741	Dimension Data
AS37468	Angola Cables
AS37497	Network Platforms (PTY) LTD
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
AS4455	IX Reach Ltd
AS47957	Worldline IGSA SA
AS48070	DSM (GB) Limited
AS48362	Stadtwerke Feldkirch
AS49544	i3D.net B.V
AS52075	Wifirst S.A.S.
AS52320	GlobeNet Cabos Submarinos Colombia, S.A.S.
AS53062	ALT \| GRUPO BRASIL TECPAR
AS5713	Telkom SA Ltd.
AS58511	Anycast Global Backbone
AS60171	AFR-IX TELECOM S.A.
AS61049	Exascale Ltd
AS62167	Tismi BV
AS63927	RISE
AS6424	EDGOO NETWORKS
AS6461	Zayo Bandwidth
AS6908	Datahop - Six Degrees
AS6939	Hurricane Electric LLC
AS8220	COLT Technology Services Group Limited
AS8359	MTS PJSC
AS8455	atom86 BV
AS8708	DIGI ROMANIA S.A.
AS8966	EMIRATES TELECOMMUNICATIONS GROUP COMPANY (ETISALAT GROUP) PJSC
AS9044	BSE Software GmbH
AS9304	HGC Global Communications Limited

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ASN API & Database

Upstreams

There are 5 upstreams for this ASN.

upstreams	Name
AS1299	Arelion Sweden AB
AS174	Cogent Communications, LLC
AS3257	GTT Communications Inc.
AS6461	Zayo Bandwidth
AS6939	Hurricane Electric LLC

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ASN API & Database

Downstreams

There are no downstreams for this ASN.

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ASN API & Database

Pingable IPs

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

IP Address	ASN	Details
185.183.23.98	AS43872 Optinet U.K. Limited	`0.48ms` from London, GB
91.201.105.10	AS43872 Optinet U.K. Limited	`0.75ms` from London, GB
185.253.177.4	AS43872 Optinet U.K. Limited	`0.48ms` from London, GB
5.253.252.245	AS43872 Optinet U.K. Limited	`0.40ms` from London, GB
5.253.254.171	AS43872 Optinet U.K. Limited	`0.52ms` from London, GB
185.183.21.53	AS43872 Optinet U.K. Limited	`0.39ms` from London, GB
176.101.169.144	AS43872 Optinet U.K. Limited	`0.49ms` from London, GB
195.234.28.81	AS43872 Optinet U.K. Limited	`0.39ms` from London, GB
193.247.101.23	AS43872 Optinet U.K. Limited	`0.36ms` from London, GB
193.247.94.13	AS43872 Optinet U.K. Limited	`0.27ms` from London, GB
185.253.176.130	AS43872 Optinet U.K. Limited	`0.40ms` from London, GB
2a0b:180:dc01:eb01::50	AS43872 Optinet U.K. Limited	`0.84ms` from London, GB
92.118.111.126	AS43872 Optinet U.K. Limited	`0.37ms` from London, GB
185.253.178.1	AS43872 Optinet U.K. Limited	`0.33ms` from London, GB
193.247.165.193	AS43872 Optinet U.K. Limited	`0.69ms` from London, GB
5.253.255.184	AS43872 Optinet U.K. Limited	`0.41ms` from London, GB
185.183.20.210	AS43872 Optinet U.K. Limited	`0.27ms` from London, GB
2a0b:180:dc00:eb01::217	AS43872 Optinet U.K. Limited	`0.97ms` from London, GB
193.105.189.39	AS43872 Optinet U.K. Limited	`0.41ms` from London, GB
5.253.253.241	AS43872 Optinet U.K. Limited	`0.45ms` from London, GB
185.183.22.49	AS43872 Optinet U.K. Limited	`0.31ms` from London, GB
2a0b:180::40	AS43872 Optinet U.K. Limited	`0.45ms` from London, GB
2a0b:180:dc02:eb01::54	AS43872 Optinet U.K. Limited	`0.97ms` from London, GB
185.253.179.118	AS43872 Optinet U.K. Limited	`0.54ms` from London, GB
185.187.61.227	AS43872 Optinet U.K. Limited	`0.41ms` 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
141.140.83.128	AS20115 Charter Communications LLC	`0.82ms` from Ashburn, US
20.81.121.160	AS8075 Microsoft Corporation	`0.57ms` from Ashburn, US
181.124.44.48	AS23201 Telecel S.A.	`8.59ms` from Asuncion, PY
81.196.16.224	AS8708 DIGI ROMANIA S.A.	`2.88ms` from Bucharest, RO
195.138.89.0	AS6876 TENET Scientific Production Enterprise LLC	`4.66ms` from Chisinau, MD
43.139.15.240	AS45090 Shenzhen Tencent Computer Systems Company Limited	`1.90ms` from Guangzhou, CN
90.72.61.224	AS2376 Bleu SAS	`0.47ms` from Marseille, FR
217.172.218.0	AS3269 Telecom Italia S.p.A.	`6.99ms` from Milan, IT
46.72.52.32	AS12714 PJSC MegaFon	`10.74ms` from Moscow, RU
75.214.226.112	AS6167 Verizon Business	`9.50ms` from New York City, US
13.227.208.144	AS16509 Amazon.com, Inc.	`0.17ms` from Prague, CZ
39.81.54.208	AS4837 CHINA UNICOM China169 Backbone	`9.17ms` from Qingdao, CN
79.15.3.0	AS3269 Telecom Italia S.p.A.	`12.15ms` from Rome, IT
183.86.223.160	AS17589 GABIA Inc.	`0.62ms` from Seoul, KR
119.116.89.208	AS4837 CHINA UNICOM China169 Backbone	`4.07ms` from Tieling, CN
113.239.138.32	AS4837 CHINA UNICOM China169 Backbone	`12.49ms` from Tieling, CN
142.189.128.128	AS577 Bell Canada	`3.24ms` from Toronto, CA
27.29.150.96	AS4134 CHINANET-BACKBONE	`6.30ms` from Wuhan, CN
86.81.58.32	AS1136 KPN B.V.	`1.87ms` from Amsterdam, NL
54.76.13.144	AS16509 Amazon.com, Inc.	`0.21ms` from Dublin, IE
115.72.60.80	AS7552 Viettel Group	`1.68ms` from Hanoi, VN
76.176.82.128	AS20001 Charter Communications Inc	`7.62ms` from Los Angeles, US
6.14.168.64	AS668 United States Department of Defense (DoD)	`1.70ms` from Los Angeles, US
79.26.77.160	AS3269 Telecom Italia S.p.A.	`3.04ms` from Naples, IT
193.253.236.160	AS3215 Orange S.A.	`1.97ms` from Paris, FR

Traceroute

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

traceroute -a -n -q1 -f4 185.183.20.212

traceroute to 185.183.20.212 (185.183.20.212): 64 hops max, 52 byte packets

4 [] 195.66.237.113 1.294 ms

5 [AS43872] 185.183.20.212 0.407 ms

Measurement taken from

IPinfo ProbeNet in London, GB

On February 16th 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 AS43872 at robtex.

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