asn.dev

Autonomous system

AS27256 CBNBC-NET

Unclassified ARIN

IPv4 addresses 2.05K 1 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly CA
Exchanges 0 recorded by PCH
Upstreams 1 0 downstream
Flagged prefixes 0 none

Summary

Cybernet Communications

Canada · AI-generated

business canada small

The AS handle CBNBC-NET is held by Cybernet Communications Ltd.

What it's used for

  • The address space carries a single IPv4 block, 199.58.168.0/21, with the netname CBNBC-NET and registrant Cybernet Communications Ltd.
  • The network announces 2048 IPv4 addresses across 1 prefix and has 0 IPv6 prefixes. With only 1 observed neighbour, the low address-to-neighbour ratio suggests a small, self-contained business or internal network rather than a transit or large access provider.

Notable

  • The RDAP registrant Cybernet Communications Ltd matches the registry holder and the AS handle, indicating consistent ownership.
  • The inventory consists of a single contiguous /21 block, representing a compact and uniform address 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
AS18988City West Cable & Telephone Corp.66

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-30, 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 · 2.05K addresses IPv6 0 prefixes

CountryNamePrefixes
CACanada1

Registry

Allocation record

ARIN · via Atlas (registry + RDAP)
Registry
ARIN
Handle
AS27256
Registry name
CBNBC-NET
Registrant
Cybernet Communications Ltd
Abuse contact
helpdesk@siennanetworks.ca
Registered
2010-09-21
Last changed
2012-03-02
Allocation
assigned

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 1 with no ROA
ROAs
0 authorising AS27256
ASPA
no ASPA record
IRR
100% registered · 1 of 1 announcements
Route objects
1 naming AS27256

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: 447 networks and 1,849 prefixes, as published 2026-10-30. 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