asn.dev

Autonomous system

AS206405 CALIU CALIU LTD

Unclassified APNIC

IPv4 addresses 1.02K 1 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly GB
Exchanges 0 recorded by PCH
Upstreams 1 0 downstream
Flagged prefixes 0 none

Summary

Caliu Ltd

United Kingdom · AI-generated

business fibre uk private

CALIU is operated by Caliu Ltd.

What it's used for

  • The address space is registered under the netname UK-IPNSL-20160620 with registrant CALIU LTD.
  • The AS announces a single IPv4 prefix, 185.156.188.0/22, comprising 1024 addresses, with 0 IPv6 prefixes.
  • With 1 observed neighbour, the network functions as a dedicated private infrastructure provider rather than a transit or large-scale access network.
  • Traffic consists of business-grade fibre internet and specialised high-performance private networking services for organisations in Milton Keynes and London data centres.

Notable

  • The RDAP registrant CALIU LTD matches the AS holder CALIU CALIU LTD.
  • The address inventory consists of a single contiguous /22 block, indicating a focused, self-contained corporate estate.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.

Interconnection

Peering at a glance

Full topology · Graph

Internet exchanges

No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.

Transit providers

1 upstream, 0 downstream and 1 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS401561Proxel Innovations LLC63

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-11-06, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.

Address space

Summary

Shape and geography

IPv4 1 prefixes · 1.02K addresses IPv6 0 prefixes

CountryNamePrefixes
GBUnited Kingdom1

Registry

Allocation record

APNIC · via Atlas (registry + RDAP)
Registry
APNIC
Handle
AS206405
Registry name
CALIU
Registrant
CALIU LTD
Abuse contact
abuse@ipnsl.co.uk
Registered
2017-01-25
Last changed
2021-03-01
Allocation
allocated

Declared

PeeringDB profile

self-reported
Name
Caliu Ltd
Scope
Europe
Traffic ratio
Balanced
Peering policy
Selective
IRR as-set
AS-IPNSL
Facilities
1 facilities
Website
https://www.caliu.net

PeeringDB records are maintained by the network operator and are not independently verified. Treat them as a statement of intent rather than of fact. For the observed and recorded view, see peering, which lists the exchanges Packet Clearing House has a port on file for.

Routing security

RPKI and IRR

Full detail
RPKI
100% valid · 1 valid, 0 with no ROA
ROAs
11 authorising AS206405
ASPA
no ASPA record
IRR
100% registered · 1 of 1 announcements
Route objects
13 naming AS206405

Reputation

Classification and threat

Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.

Spamhaus DROP

Not on ASN-DROP The network as a whole is not listed.

No DROP prefixes None of its announced space is on the DROP prefix list.

Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 454 networks and 1,854 prefixes, as published 2026-11-06. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.

FBI IC3

No IC3 indicators Nothing from the FBI IC3 feed.

IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.

Elsewhere

Cross-check