AS205311

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Summary

IP address summary information
Name	Cambridge Fibre Networks Ltd.
Country	United Kingdom
Website	host.io/cfn.ltd·cfn.ltd
Hosted domains	60
IPv4 addresses	1,280
IPv6 addresses	6.34 × 10²⁹
ASN type	ISP
Registry	RIPE
Allocated	8 years ago on Sep 25, 2017
Updated	7 years ago on Jul 3, 2019

Ranking

#26,518

Overall rank

among 42,415 networks

Traffic

#20,767

Infrastructure

#13,013

#554inUnited Kingdom

Learn how ASN rankings work

Geolocation

Share of IPv4 footprint per hexagonLessMore

Countries by IPv4 share

United Kingdom
100%

Held location over 90 days: 80%
Held location over 1 year: 78%
Median days between moves: 92 days
Geolocation scope: City

How consistently this network's IPs hold their geolocation. Read relative to the network type, not as a quality score.

Activity

A pronounced day/night rhythm — the signature of a consumer/eyeball network whose users sleep at night.

Mon

IP Ranges

Netblock	Company	Num of IPs
185.219.108.0/22	Cambridge Fibre Networks Ltd.	1,024
185.229.51.0/24	Cambridge Fibre Networks Ltd.	256

IP Ranges

WHOIS


  ASHandle:       █████
  OrgID:          █████
  ASName:         ██████
  ASNumber:       AS█████
  RegDate:        ████-██-██
  Updated:        ████-██-██
  TechHandle:     ████-████
  Source:         ████

Hosted Domains

There are 60 domain names hosted across 29 IP addresses on this ASN.

IP Address	Domain	Count
185.219.108.108		9
185.219.110.194		8
185.219.110.85		5
185.219.110.65		4
185.219.109.171		4

Places

IPs in this network linked to physical places, based on their Wi-Fi networks.

Places IPs6
Bar3
Coffee Shop2
Museum1

Category	In AS205311	Example IP
Bar	3	185.219.110.133
Coffee Shop	2	185.219.110.188
Museum	1	185.219.108.71

Places

Peers

There are 1 peers for this ASN.

ASN	Name	Rank
AS35826	Netservers Limited

Upstreams

There are 1 upstreams for this ASN.

ASN	Name	Rank
AS35826	Netservers Limited

Downstreams

There are 0 downstreams for this ASN.

No downstreams found.

Pingable IPs

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

IP Address	ASN	Details
2a0b:e541:c3d::1 Ping	AS205311Cambridge Fibre Networks Ltd.	2.93ms from London, GB
2a0b:e541:14a0::1 Ping	AS205311Cambridge Fibre Networks Ltd.	3.30ms from London, GB
2a0b:e541:931:0:211:32ff:fe11:3291 Ping	AS205311Cambridge Fibre Networks Ltd.	3.55ms from London, GB
2a0b:e541:1427:0:86d6:c5ff:fe2b:5ee7 Ping	AS205311Cambridge Fibre Networks Ltd.	6.42ms from London, GB
2a0b:e541:674:0:86d6:c5ff:fe40:7b42 Ping	AS205311Cambridge Fibre Networks Ltd.	8.16ms from London, GB
2a0b:e541:632::1 Ping	AS205311Cambridge Fibre Networks Ltd.	3.79ms from London, GB
2a0b:e541:10c4:0:86d6:c5ff:fe02:f54c Ping	AS205311Cambridge Fibre Networks Ltd.	6.73ms from London, GB
2a0b:e541:e31::1 Ping	AS205311Cambridge Fibre Networks Ltd.	2.19ms from London, GB
2a0b:e541:651:0:211:32ff:fec2:c7cc Ping	AS205311Cambridge Fibre Networks Ltd.	3.85ms from London, GB
2a0b:e541:1247:0:211:32ff:fef7:df43 Ping	AS205311Cambridge Fibre Networks Ltd.	3.06ms from London, GB

Other Pingable IPs

IP Address	ASN	Details

Pingable IPs

Important routers in AS205311


2a0b:e540:0:10:0:cfbb:bb9:1	London, United Kingdom
2a0b:e540:0:10:0:cfbb:bb9:2	Cambridge, United Kingdom
185.219.111.6	London, United Kingdom
185.219.111.5	London, United Kingdom
185.219.111.9	London, United Kingdom
2a0b:e540:0:10:0:cfbb:bb9:3	London, United Kingdom
2a0b:e540:0:3::110:2	Cambridge, United Kingdom
2a0b:e540:0:3::f:2	Cambridge, United Kingdom
2a0b:e540:0:3::111:2	Cambridge, United Kingdom
185.229.51.1	London, United Kingdom

Important routers in AS205311

Traceroute

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

$ traceroute -a -n -q1 -f4 185.219.109.252

traceroute to 185.219.109.252 (185.219.109.252): 64 hops max, 52 byte packets

4 [AS35826] 185.113.204.33 0.588 ms

5 [AS35826] 94.229.130.151 129.546 ms

6 [AS35826] 94.229.130.135 1.998 ms

7 [AS35826] 80.248.183.59 1.863 ms

8 [AS205311] 185.219.111.6 1.84 ms

9 [AS205311] 185.219.109.252 2.345 ms

Measurement taken from

IPinfo ProbeNet in London, GB

On September 10, 2026

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 AS205311 at robtex.

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AS205311

Summary

Ranking

Geolocation

Countries by IPv4 share

Activity

IP Ranges

IP Ranges

WHOIS

Hosted Domains

Places

Places

Peers

Upstreams

Downstreams

Pingable IPs

Other Pingable IPs

Pingable IPs

Important routers in AS205311

Important routers in AS205311

Traceroute

Related Networks

AS15490

AS198351

AS206166

AS206232

AS25314

What is an ASN?

An API built with users in mind: reliable, accurate, and easy-to-use

Our IP tools

What is my IP?

Map IPs

Summarize IPs

Traceroute

Ranking

IP Ranges

Important routers in AS205311

Geolocation

Countries by IPv4 share

Pingable IPs

Other Pingable IPs

Activity

Places

AS15490

AS198351

AS206166

AS206232

AS25314

AS39630